Hemi problems again.. valve to valve clearance
#585908
01/17/10 07:38 PM
01/17/10 07:38 PM
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Bob_Coomer
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Finally got everything mocked up, short block together etc. Despite some trouble with with the rotating assembly, (actually a rod bearing issue). Well I talked with a few of some very helpful people on this board, so I decided to do some checking for possible valve to valve issue's. I measured the distance between the valves with the valves on the seat, and didnt like what i found.. Mopar calls for .280-.300 for cams above .700 lift. I had right at .255-.260 or so. So I knew this might be a problem.. Well this cam is has wide lobe centers of 112 LSA, I degree'd and checked the cam and installed it at a 109-110 ICL so its advanced a hair. Well I was checking piston to valve clearance which is fine By the way... Anyways I was checking piston to valve clearance and noticed that the valves during overlap was very close, you can see the valve events pretty good looking through the intake port..How close..Well they didnt touch rotating the engine in the correct direction. But as I rotated the engine back words, I guess the slop in the timing chain etc retarded the cam, or changed the valve events enough that the valves clipped each other...They physically hit one another.. I had those light checker springs installed etc, so I didnt bend any valves etc. Luckily.. So now, I want to run this cam, so I must address the valves/heads to correct this issue. I know I can sink the valves, Should I sink just one valve like .050 or sink them both like .025? The valves are on diff angles so maybe I can gain more by sinking one valve compared to sinking the same amount off the other? Can the valves them self's be back cut any to gain any radial clearance?? Even if I can take as little as .008-.010 off each valve diameter would help.. Thanks in advise Bob Coomer
[color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: Hemi problems again.. valve to valve clearance
[Re: Cab_Burge]
#585910
01/17/10 08:39 PM
01/17/10 08:39 PM
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Joined: Jan 2003
Posts: 995 Boynton Beach, Fl
Rapid588
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Before getting too excited about them hitting i would set the valves up with the intended springs you are going to use, set with lash and then check again (going the correct direction). There will be a bit of deflection in the pushrods and the rest of valvetrain, big cams are a lot of times real close on valves missing each other, but if you do have to adjust i would cut the exhaust valve down slightly.
93 Dodge Stealth - Supercharged 526ci Hemi 93 Dodge Daytona Top Sportsman injected 588 Hemi - plus a lil NOS 67 Hemi GTX (may the 4speed with you!)
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Re: Hemi problems again.. valve to valve clearance
[Re: Rapid588]
#585911
01/17/10 08:51 PM
01/17/10 08:51 PM
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Joined: Nov 2003
Posts: 6,293 Rock Springs
Bob_Coomer
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Quote:
Before getting too excited about them hitting i would set the valves up with the intended springs you are going to use, set with lash and then check again (going the correct direction). There will be a bit of deflection in the pushrods and the rest of valvetrain, big cams are a lot of times real close on valves missing each other, but if you do have to adjust i would cut the exhaust valve down slightly.
My machist actually told me the same thing.
During the time that they were hitting. There was NO head gasket, the valve lash was set to zero. I dont think the head gasket would matter, but the valve lash might make a diff. But even MP knew it might be problem with large lift and large duration cams..And Ma Mopar called for .300 between the valves with them on the seat...I know for fact I have only .255-.260 max..Si its close. If two years down the road, and I have some valve guide wear..kaboom..its too close for comfort for me really. I couldnt measure it, but at the closest point it was only .020 inch .025 tops.
Last edited by Bob_Coomer; 01/17/10 08:52 PM.
[color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: Hemi problems again.. valve to valve clearance
[Re: Bob_Coomer]
#585916
01/17/10 11:54 PM
01/17/10 11:54 PM
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Joined: Oct 2004
Posts: 1,752 detroit area
moderncylinder
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hey bob i run .900 lift and .260 valve to valve,,,, ma mopar must have missed the boat on me.... the mopar jury must not apply to me..
do not go on assumption.... check your actual clearance with springs, lash up through the bottom of the cylinder,, if you have .025 run it
and pretty much noone runs .300 valve to valve anymore,, unless you are running a 426 with a cam from 1970
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Re: Hemi problems again.. valve to valve clearance
[Re: moderncylinder]
#585917
01/18/10 07:53 AM
01/18/10 07:53 AM
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Joined: Dec 2007
Posts: 12,587 Great Neck,LI,new york
hemi-itis
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Quote:
hey bob i run .900 lift and .260 valve to valve,,,, ma mopar must have missed the boat on me.... the mopar jury must not apply to me..
do not go on assumption.... check your actual clearance with springs, lash up through the bottom of the cylinder,, if you have .025 run it
and pretty much noone runs .300 valve to valve anymore,, unless you are running a 426 with a cam from 1970
Priceless info right there!!I would never have thought......
HEMI-ITIS has no cure. My condition is fully BLOWN!!
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Re: Hemi problems again.. valve to valve clearance
[Re: LSP]
#585919
01/18/10 08:57 AM
01/18/10 08:57 AM
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Joined: Nov 2004
Posts: 3,619 Norwich CT USA
Defbob
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Check all the valve to valve measurements on the seat on each chamber. Note the chamber with the closest measurement, pull that piston/rod out and mock up the head/actual valvetrain on that cylinder. See that you have the minimum of .025" as Jeff said at valve overlap. I would leave the intakes alone, and sink/clip the exhausts to get your clearance.
Careful about following the mopar "bible" too much, that info is way outdated.
it says the purple cam is the most powerful cam for a 440
Bob, I would listen to ModernCylinder
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Re: Hemi problems again.. valve to valve clearance
[Re: MuscleMike]
#585923
01/18/10 03:43 PM
01/18/10 03:43 PM
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Joined: Mar 2006
Posts: 9,910 Eighty Four, PA
B G Racing
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With close center long duration camshafts it is advisable to have a minimum of .280/.290 between the valves on the seat.Jeff may be getting away with .025 at the valve to valve intersecting point and only have .260 between the valves on the seat with the design of cam he is using.I would not and never recommend you use his numbers with that cam I gave you.The slightest deviation could spell disaster, a loose guide,slight varaying position of a guide center,or a side loading of the valve from unstabe or poor geometry.Even a pushrod bind can cause enough deflection in a long valve with a 5/16 stem to cause concern.I'am not doubting Jeff's claim,after all he is the head guru for race applications and especially SS/AH Hemis,and he would know better than any of us.If your that confident in his recommendation go for it,what do you have to loose?I stand buy what I said,I would rather be conservative and safe than be sorry later.Bob your not building a SS/AH granade and trimming or sinking those valve won't kill a 100hp for sure and you will sleep better.What ever you decide,good luck. P.S.FYI, Jeff it is an early style cam.
Last edited by B G Racing; 01/18/10 08:02 PM.
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Re: Hemi problems again.. valve to valve clearance
[Re: Cab_Burge]
#585926
01/18/10 04:13 PM
01/18/10 04:13 PM
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Joined: Aug 2004
Posts: 2,128 sweden
sshemi
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Are you saying that the int and ex valves in the same cylinder are hitting each other when you turn the motor over only in one diretion????? How the %#!" is that possible??? Is the cam twisting in one direction?
Cam does not twist, it is a physcical contact on the overlap of the valves, not unusual with bigger cams on the 426 hemi motors, be very careful when setting the cam up and make sure to check them like what has already been said to do the bigger the lift(.700+ and duration (286+)the more likely you can have a problem
But only when turning it over in one direction???
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Re: Hemi problems again.. valve to valve clearance
[Re: 52savoy]
#585928
01/18/10 04:32 PM
01/18/10 04:32 PM
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Joined: Dec 2003
Posts: 1,400 Wi.
old_racer
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Besides clipping the valves for clearance, no one mentioned(or I missed it) anywhere about cutting the exhaust valve to 1.900. I agree with BG..old school cams should be set up the old school way. I run a Crane R290 in my 477 and it's clipped with 1.900 exh valves. It wouldn't work(clear) any other way even with moving the cam timing around.
Hi, I ran the old R290 (I still have it)years back also, I assembled the motor with out pistons and rods, with everything just the way it would run and checked it that way, I back cut the intakes and clipped the exh diameter till I had about .050 between the valves at full overlap. Russ
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Re: Hemi problems again.. valve to valve clearance
[Re: old_racer]
#585929
01/18/10 05:57 PM
01/18/10 05:57 PM
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Joined: Nov 2003
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Bob_Coomer
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Besides clipping the valves for clearance, no one mentioned(or I missed it) anywhere about cutting the exhaust valve to 1.900. I agree with BG..old school cams should be set up the old school way. I run a Crane R290 in my 477 and it's clipped with 1.900 exh valves. It wouldn't work(clear) any other way even with moving the cam timing around.
Hi, I ran the old R290 (I still have it)years back also, I assembled the motor with out pistons and rods, with everything just the way it would run and checked it that way, I back cut the intakes and clipped the exh diameter till I had about .050 between the valves at full overlap. Russ
Yep Thats what were are shooting for at least .040+ I know guys run them closer, I also know those guys service there engine a bunch more frequent also. I bet they dont go season, after season without refreshing the heads etc...Being a bracket engine, a few seasons with hundreds or runs..Guide clearance gets loose .003-.004 or so, and the bottom see's .008-.010 movement..kaboom. Its probably no big deal to those guys, if they kill a piston, or knock the head off a valve..they have deep pockets..I dont however..
The heads and valves are over to the machine shop now. He said the margins on these new valves were super thick and were +.080..He is going to gauge the clearance, then cut the margin down to about .040-.050 backcut the valve again, and see what he gained by doing this..If he gets a desent return he will do them all. I will then mock it back up and measure actual clearance between the valves during over lap.. We are looking for .040 minimal, or he will sink the exh valve some to achieve what I want...
The one cam I have is probably a 1970 Crane grind that has a narrow 104 LSA..I might try it in this long stroke engine just too see what and how it runs, just for experience. As for the .290-.300 I may not be able to get those margins, but I wished I had them. If it worked back then, it will work now..no matter how out dated it is. I have several intakes,cams, and I plan to just have fun, and test some parts out..
[color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: Hemi problems again.. valve to valve clearance
[Re: Bob_Coomer]
#585930
01/18/10 06:19 PM
01/18/10 06:19 PM
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B G Racing
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Besides clipping the valves for clearance, no one mentioned(or I missed it) anywhere about cutting the exhaust valve to 1.900. I agree with BG..old school cams should be set up the old school way. I run a Crane R290 in my 477 and it's clipped with 1.900 exh valves. It wouldn't work(clear) any other way even with moving the cam timing around.
Hi, I ran the old R290 (I still have it)years back also, I assembled the motor with out pistons and rods, with everything just the way it would run and checked it that way, I back cut the intakes and clipped the exh diameter till I had about .050 between the valves at full overlap. Russ
Yep Thats what were are shooting for at least .040+ I know guys run them closer, I also know those guys service there engine a bunch more frequent also. I bet they dont go season, after season without refreshing the heads etc...Being a bracket engine, a few seasons with hundreds or runs..Guide clearance gets loose .003-.004 or so, and the bottom see's .008-.010 movement..kaboom. Its probably no big deal to those guys, if they kill a piston, or knock the head off a valve..they have deep pockets..I dont however..
The heads and valves are over to the machine shop now. He said the margins on these new valves were super thick and were +.080..He is going to gauge the clearance, then cut the margin down to about .040-.050 backcut the valve again, and see what he gained by doing this..If he gets a desent return he will do them all. I will then mock it back up and measure actual clearance between the valves during over lap.. We are looking for .040 minimal, or he will sink the exh valve some to achieve what I want...
The one cam I have is probably a 1970 Crane grind that has a narrow 104 LSA..I might try it in this long stroke engine just too see what and how it runs, just for experience. As for the .290-.300 I may not be able to get those margins, but I wished I had them. If it worked back then, it will work now..no matter how out dated it is. I have several intakes,cams, and I plan to just have fun, and test some parts out..
Your astute wisdom reflects your age Gather all the information and make the best decision that will serve your purpose.
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Re: Hemi problems again.. valve to valve clearance
[Re: Bob_Coomer]
#585931
01/18/10 07:52 PM
01/18/10 07:52 PM
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Joined: Aug 2003
Posts: 43,157 Bend,OR USA
Cab_Burge
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I wouldn't even try that Crane with that LSA, it will make the EGT go sky high and loose a lot of the intake charge and compression out the exhausts I did try a Crane R292-R296 (marine grind )on 108 LSA in a 12.5 to 1 comp. ratio 426 cross ram motor with Bauman SS Carbs and that rascal wouldn't start to run until 4400+ RPM, not good for a bracket motor or a street motor I tried to talk the customer out of using that cam but he had to have try it
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Hemi problems again.. valve to valve clearance
[Re: B G Racing]
#585932
01/18/10 10:32 PM
01/18/10 10:32 PM
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Joined: Oct 2004
Posts: 1,752 detroit area
moderncylinder
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i know its an old cam bob,, something for a 426 sized motor,, with a 3.75 stroke,, i know its totally the wrong cam for bob but i think he got it for free or something like that..
you DO NOT need that much overlap with a sroker motor due to the less dwell at tdc respective to stroke travel, more overlap helps to scavange intake charge while the piston is moving about tdc, higher rod ratios need more overlap due to more dwell time for their respective stroke. i dont know what your cam is,, i forgot but i though it had like 72-74 degrees of overlap at .050,,, you would be better with 60 or so,,, maybe even 55 with a 572
"it worked back then so it will work today",,, sure the engine will start and run,, will it be the best cam, or close to it,, not even close,, you will "waste" alot of charge out the exhaust due to overscavaging cause,,,,,,,,, drumroll please.... what cab said.... it has too much overlap,, and if you had less overlap, youd have more valve to valve and youd be fine,, if you had the appropriate cam for your combo...
i understand getting things for free, and wanting to learn yourself that when you do what people tell you to it runs faster,,, im sure it wont be much of a headacche to just clip the margins,, i would not face them,, airflow would be better if you clipped them
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Re: Hemi problems again.. valve to valve clearance
[Re: moderncylinder]
#585933
01/18/10 10:44 PM
01/18/10 10:44 PM
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Anonymous
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Anonymous
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bob, get rid of the cam and get the correct one, look at the big picture! its not really free when you have to go through all of this to get it to work, plus the cam isnt the right one for your application. listen to jeff.
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Re: Hemi problems again.. valve to valve clearance
[Re: moderncylinder]
#585934
01/18/10 10:53 PM
01/18/10 10:53 PM
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Joined: Jan 2003
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mr_340
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Jeff, what sort of LSAs are they running now in SS/AH? I've heard something around 112, but that was a few years back.
Floyd Lippencott IV
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Re: Hemi problems again.. valve to valve clearance
[Re: moderncylinder]
#585936
01/19/10 04:17 PM
01/19/10 04:17 PM
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Joined: Dec 2005
Posts: 4,231 State of retirement
52savoy
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Quote:
i know its an old cam bob,, something for a 426 sized motor,, with a 3.75 stroke,, i know its totally the wrong cam for bob but i think he got it for free or something like that..
you DO NOT need that much overlap with a sroker motor due to the less dwell at tdc respective to stroke travel, more overlap helps to scavange intake charge while the piston is moving about tdc, higher rod ratios need more overlap due to more dwell time for their respective stroke. i dont know what your cam is,, i forgot but i though it had like 72-74 degrees of overlap at .050,,, you would be better with 60 or so,,, maybe even 55 with a 572
"it worked back then so it will work today",,, sure the engine will start and run,, will it be the best cam, or close to it,, not even close,, you will "waste" alot of charge out the exhaust due to overscavaging cause,,,,,,,,, drumroll please.... what cab said.... it has too much overlap,, and if you had less overlap, youd have more valve to valve and youd be fine,, if you had the appropriate cam for your combo...
i understand getting things for free, and wanting to learn yourself that when you do what people tell you to it runs faster,,, im sure it wont be much of a headacche to just clip the margins,, i would not face them,, airflow would be better if you clipped them
Jeff, No one was trying to undermine your wisdom.
I never said and I don't believe anyone else did either that "it worked back then so it will work today",,, . It was just trying to get Bob on the right track with that old cam profile. I do think his best choice is like you and a couple others have said...buy a new cam profile for a motor that size. But I take him at his word that he wants to use it and know how to set it up.
peace brothers
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Re: Hemi problems again.. valve to valve clearance
[Re: 52savoy]
#585938
01/19/10 08:23 PM
01/19/10 08:23 PM
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Joined: Nov 2003
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Bob_Coomer
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I just dont think the cam is way off in left field for the engine..I wished it was about 5 deg smaller on both the intake and exh side as for as duration goes...I like the 112 LSA etc.
The cam is 290°@.050 on the intake and 300°@.050 on the exh looks like overlap is about 71 deg or so. I degree'd the cam in at 109.5-110 LSA which worked out to be exactly what the cams valve events written on the cam card. I liked the fact that the lift at the valve retainer was .775 for the intake and .755 for the exh.
I would love to know how much they can move this cam on a regrind. They probably couldnt tell me unless it was sent in and they knew things like hardness depth etc. Id say .010-.015 would be max they could move whats there including the base circle. Anyone know for sure or have any cam experience? Looking at Comps Master Cam lobe library..I still would be looking at numbers in the mid 280's on the intake and low to mid 290's on the exh, with about the same LSA give or take a degree or so.
probably a DR or XR intake Lobe and a XCX or JX exh lobe.
Yep Its a money thing now, buying parts twice is what has hurt me...Changing directions during the build, and not doing my home work has cost me time and money. Things like Cam, lifters, valve springs,retainers, spring cups, cams, intakes, and even valve covers. But one way or another, the engine will be finished and running well. Even if things are optimal for my combo..They can be changed, I never cared to work on my stuff. I have even been known to take apart good engines for no apparent reason..just too have a look. So labor around here doesnt cost about $0.25 per/hour.
[color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: Hemi problems again.. valve to valve clearance
[Re: Bob_Coomer]
#585939
01/19/10 09:47 PM
01/19/10 09:47 PM
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Joined: Aug 2009
Posts: 2,042 Mooresburg, Tn
'72CudaRacer
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So labor around here doesnt cost about $0.25 per/hour.
Bob, I never said I was going to work on your engine. (thats what my wage works out to be) Brian
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Re: Hemi problems again.. valve to valve clearance
[Re: Bob_Coomer]
#585940
01/20/10 11:14 AM
01/20/10 11:14 AM
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Posts: 4,231 State of retirement
52savoy
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I just dont think the cam is way off in left field for the engine..I wished it was about 5 deg smaller on both the intake and exh side as for as duration goes...I like the 112 LSA etc.
The cam is 290°@.050 on the intake and 300°@.050 on the exh looks like overlap is about 71 deg or so. I degree'd the cam in at 109.5-110 LSA which worked out to be exactly what the cams valve events written on the cam card. I liked the fact that the lift at the valve retainer was .775 for the intake and .755 for the exh.
I would love to know how much they can move this cam on a regrind. They probably couldnt tell me unless it was sent in and they knew things like hardness depth etc. Id say .010-.015 would be max they could move whats there including the base circle. Anyone know for sure or have any cam experience? Looking at Comps Master Cam lobe library..I still would be looking at numbers in the mid 280's on the intake and low to mid 290's on the exh, with about the same LSA give or take a degree or so.
probably a DR or XR intake Lobe and a XCX or JX exh lobe.
Yep Its a money thing now, buying parts twice is what has hurt me...Changing directions during the build, and not doing my home work has cost me time and money. Things like Cam, lifters, valve springs,retainers, spring cups, cams, intakes, and even valve covers. But one way or another, the engine will be finished and running well. Even if things are optimal for my combo..They can be changed, I never cared to work on my stuff. I have even been known to take apart good engines for no apparent reason..just too have a look. So labor around here doesnt cost about $0.25 per/hour.
I considered regrinding my R290 a couple years ago but after seeing what Crane wanted to do it, a new cam was cheaper(way).
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Re: Hemi problems again.. valve to valve clearance
[Re: Bob_Coomer]
#585941
01/20/10 11:54 AM
01/20/10 11:54 AM
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Joined: Jun 2009
Posts: 705 Michigan
Hemiroid
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Quote:
I just dont think the cam is way off in left field for the engine..I wished it was about 5 deg smaller on both the intake and exh side as for as duration goes...I like the 112 LSA etc.
The cam is 290°@.050 on the intake and 300°@.050 on the exh looks like overlap is about 71 deg or so. I degree'd the cam in at 109.5-110 LSA which worked out to be exactly what the cams valve events written on the cam card. I liked the fact that the lift at the valve retainer was .775 for the intake and .755 for the exh.
I would love to know how much they can move this cam on a regrind. They probably couldnt tell me unless it was sent in and they knew things like hardness depth etc. Id say .010-.015 would be max they could move whats there including the base circle. Anyone know for sure or have any cam experience? Looking at Comps Master Cam lobe library..I still would be looking at numbers in the mid 280's on the intake and low to mid 290's on the exh, with about the same LSA give or take a degree or so.
probably a DR or XR intake Lobe and a XCX or JX exh lobe.
Yep Its a money thing now, buying parts twice is what has hurt me...Changing directions during the build, and not doing my home work has cost me time and money. Things like Cam, lifters, valve springs,retainers, spring cups, cams, intakes, and even valve covers. But one way or another, the engine will be finished and running well. Even if things are optimal for my combo..They can be changed, I never cared to work on my stuff. I have even been known to take apart good engines for no apparent reason..just too have a look. So labor around here doesnt cost about $0.25 per/hour.
Bob, I hear ya about money concerns. That being said, I'd really consider a new cam if I were you. It seems really strange that you'd use the wrong cam and go to a lot of trouble(and some $$) in a $20,000+ engine to save $300??
I wish you the best in whatever you decide to do. Love the car and look forward to seeing it make laps some day
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Re: Hemi problems again.. valve to valve clearance
[Re: Bob_Coomer]
#585944
01/20/10 03:37 PM
01/20/10 03:37 PM
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52savoy
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Bob, hopefully this post has lost steam I talked to Jack Moore(Moore&Moore) over the weekend at the Columbus swap met. He said, he actually ran as good if not better with an old profile cam(R296) in his 572incher. ain't say'n no'mo Fred
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Post deleted by Defbob
[Re: 52savoy]
#585946
01/20/10 11:24 PM
01/20/10 11:24 PM
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Anonymous
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Re: Hemi problems again.. valve to valve clearance
#585947
01/21/10 06:05 AM
01/21/10 06:05 AM
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Joined: Mar 2006
Posts: 9,910 Eighty Four, PA
B G Racing
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Bob, hopefully this post has lost steam
I talked to Jack Moore(Moore&Moore) over the weekend at the Columbus swap met. He said, he actually ran as good if not better with an old profile cam(R296) in his 572incher.
I still run a 70's Crane it's been in my last 3 motors. I think maybe that the rate of lift in the older grinds was much more severe at lower lifts and could have caused the valve clearance problems. my cam card
PART 66R000424 ENGINE TYPE: MECHANICAL ROLLER
SPECIAL
GRINDN R-288/4714-2S-10
ENGINE 1966-1971 PLYMOUTH-DODGE V8 HEMI 426 CU.IN.
(THREE BOLT GEAR)
VALVE SETTING: .026 EXHAUST .026 HOT
INTAKE @ CAM 4714 @ 740 ROCKER ARM
INTAKE @ CAM 480 @ 730 IN 1.57/EX 1.52 ROCKER ARM
LIFT: EXHAUST @ @
ALL LIFTS ARE BASED ON ZERO LASH AND THEORETICAL ROCKER RATIOS
CAM OPENS CLOSES ADVERTISED
.0162 EXHAUS INTAKE 56.0 BTDC 92.0 ABDC 328 ° °
TAPPET LIFT EXHAUS 98.0 BBDC 54.0 ATDC 332 °
SPRING RECOMMENDED RPM
RANGE WITH
TRIPLE DUAL OUTER MATCHING
PART 99877 MINIMUM RPM 4500
LOAD CLOSE 220 LBS 2.000 O 2" MAXIMUM RPM 9000
OPEN: 592 LBS 1.320 VALVE FLOAT 9600
CAM OPENS CLOSES MAX LIFT DURATIO
@ .050 INTAKE 37.0 BTDC 71.0 ABDC 105 ° ATDC 288 °
TAPPET LIFT EXHAUS 79.0 BBDC 33.0 ATDC 115 ° BTDC 292 °
IMPORTANT! Crane Cams continuously improves and upgrades its cam designs. In some cases this may mean that two Crane Cams with the same part number may actually be different grinds. You must check the GRIND NUMBER stamped on the front of the camshaft and check it against the Grind Number near the top of the Spec Card.
Fred is that the cam we put in your 588"?
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Post deleted by Defbob
#585948
01/21/10 12:26 PM
01/21/10 12:26 PM
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Anonymous
Unregistered
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Anonymous
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Re: Hemi problems again.. valve to valve clearance
#585950
01/21/10 10:17 PM
01/21/10 10:17 PM
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Joined: Mar 2006
Posts: 9,910 Eighty Four, PA
B G Racing
master
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master
Joined: Mar 2006
Posts: 9,910
Eighty Four, PA
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Quote:
Quote:
Fred is that the cam we put in your 588"?
yes not just same grind it was same cam and it was in the 484 " motor when I bought the car back in 1997 then used in the 572 and now your 588" [/quot
Keep in mind Fred you are using Indy Legend heads with the moved exhaust angle and don't have the clearence problem.
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Re: Hemi problems again.. valve to valve clearance
[Re: B G Racing]
#2642022
04/06/19 05:30 PM
04/06/19 05:30 PM
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Joined: Jan 2003
Posts: 17,844 S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,844
S.E. Michigan
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This was a helpful thread to me many years later, I have .040" measured from the bottom and it seemed Fine, but I was questioning it.
Thanks for the knowledge shared here.
Zombie thread alert.
Last edited by ZIPPY; 04/06/19 05:31 PM.
Rich H.
Esse Quam Videri
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