Re: BUSHED LIFTER BORES IN STOCK BLOCK.............
[Re: Cab_Burge]
#1056074
08/19/11 11:09 AM
08/19/11 11:09 AM
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Joined: Apr 2006
Posts: 3,675 Akron, Ohio U.S.A.
roadhazard
master
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master
Joined: Apr 2006
Posts: 3,675
Akron, Ohio U.S.A.
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Quote:
Jason did my 527 block before we moved here, the 518 street motor is not bushed. The 518 made 775 HP on Oregon pump gas with the same carb that the 527 made 845 HP on race gas, both with the same set of ported Indy 440-1 heads I have piched a roller lifter out(the old bracket Duster) when a valve spring broke and bent the pushrod, oil pressure went to zero, the 527 motor broke a Smith Bros pushrod on the dyno testing and both lifters came out, no oil pressure loss
Cab, is this with a STOCK OEM block?
Puting bushing's in the bores and "correcting" geometry with bushings are 2 different things.
Has anybody degreed their cam in on #1 intake and then went and checked say #8 intake lobe to see where it comes in at on a OEM uncorrected block?
I don't have enough parts to put something together to do this but someone may have the parts and time
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Re: BUSHED LIFTER BORES IN STOCK BLOCK.............
[Re: roadhazard]
#1056075
08/19/11 01:22 PM
08/19/11 01:22 PM
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Joined: Aug 2003
Posts: 43,228 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,228
Bend,OR USA
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Quote:
Quote:
Jason did my 527 block before we moved here, the 518 street motor is not bushed. The 518 made 775 HP on Oregon pump gas with the same carb that the 527 made 845 HP on race gas, both with the same set of ported Indy 440-1 heads I have piched a roller lifter out(the old bracket Duster) when a valve spring broke and bent the pushrod, oil pressure went to zero, the 527 motor broke a Smith Bros pushrod on the dyno testing and both lifters came out, no oil pressure loss
Cab, is this with a STOCK OEM block?
Puting bushing's in the bores and "correcting" geometry with bushings are 2 different things.
Has anybody degreed their cam in on #1 intake and then went and checked say #8 intake lobe to see where it comes in at on a OEM uncorrected block?
I don't have enough parts to put something together to do this but someone may have the parts and time
I did that stock block to correct the angles( thye probally where okay, I didn't check the angles, they had .0025 + clearances then) and insure that I wouldn't loose oil pressure if the lifters came out. I have check cam lobes on both #1 and #6, you don't have to move the degree wheel to keep TDC in the same place , and found a bad cam grind when I had it check on a cam Doctor
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: BUSHED LIFTER BORES IN STOCK BLOCK.............
[Re: roadhazard]
#1056077
08/19/11 08:55 PM
08/19/11 08:55 PM
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Joined: Dec 2009
Posts: 20,640 in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
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Quote:
Quote:
Jason did my 527 block before we moved here, the 518 street motor is not bushed. The 518 made 775 HP on Oregon pump gas with the same carb that the 527 made 845 HP on race gas, both with the same set of ported Indy 440-1 heads I have piched a roller lifter out(the old bracket Duster) when a valve spring broke and bent the pushrod, oil pressure went to zero, the 527 motor broke a Smith Bros pushrod on the dyno testing and both lifters came out, no oil pressure loss
Cab, is this with a STOCK OEM block?
Puting bushing's in the bores and "correcting" geometry with bushings are 2 different things.
Has anybody degreed their cam in on #1 intake and then went and checked say #8 intake lobe to see where it comes in at on a OEM uncorrected block?
I don't have enough parts to put something together to do this but someone may have the parts and time
I did mine when I assembled the new shortblock just because I was curious and it wasn't off but maybe .5 degree. Were any others off? I don't know but that's pretty darn close for an old Crane grind if you ask me.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion. 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: BUSHED LIFTER BORES IN STOCK BLOCK.............
[Re: Cudajon]
#1056079
08/20/11 08:24 AM
08/20/11 08:24 AM
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Joined: Oct 2005
Posts: 976 ontario canada
mac56
super stock
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super stock
Joined: Oct 2005
Posts: 976
ontario canada
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Quote:
This thread is jogging a bit of remembered tech from back in the 70's. When and only when, running a roller cam some guys would bush the Mopar lifter bore .904 to chevy .842 so they could use a lighter and cheaper chevy roller lifter. The wider base circle of the mopar didn't really make much difeerence with a roller lifter. Anybody else remember this?
I would be interested to see if anyone on here has done this. When I asked my machine shop about this they said why would you do this when chev guys take theirs out to .904 size. I have not found a chev guy yet running anything but .842.
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Re: BUSHED LIFTER BORES IN STOCK BLOCK.............
[Re: mac56]
#1056080
08/20/11 10:20 AM
08/20/11 10:20 AM
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Joined: Dec 2005
Posts: 293 Kansas City Metro
mbogina
enthusiast
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enthusiast
Joined: Dec 2005
Posts: 293
Kansas City Metro
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The correction of geometry, decrease in wear, improvement in alignment- those are all great reasons to bush the lifter bores, but the biggest reason I have is for the oil control. Try priming a BBM or Hemi with the intake off it and watch the GALLONS of oil that push by the lifter bores. We frequently run only standard oil pumps in bushed motors, no HV needed, and we also frequently need to REDUCE the oil pressure in those same motors after controlling the massive leaks from the lifter bores.
Be a Rebel- Break the Laws of Physics!
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Re: BUSHED LIFTER BORES IN STOCK BLOCK.............
[Re: LA360]
#1056083
08/21/11 02:15 AM
08/21/11 02:15 AM
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Joined: Dec 2010
Posts: 49 Sterling Heights, MI
MCHBOB
member
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member
Joined: Dec 2010
Posts: 49
Sterling Heights, MI
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Quote:
Quote:
A good friend called me tonight, he is having a 426 Hemi rebuilt and the bill for bushing the lifter bores was right at a thousand dollars. This was on a MP block.
Is he having Key Way lifters fitted?
Thats what iam thinking JESEL keyway bushings are 35ish each
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Re: BUSHED LIFTER BORES IN STOCK BLOCK.............
[Re: MCHBOB]
#1056084
08/21/11 01:39 PM
08/21/11 01:39 PM
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Joined: Jan 2008
Posts: 795 Glendale Az
Darryls-Demon
super stock
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super stock
Joined: Jan 2008
Posts: 795
Glendale Az
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Quote:
Quote:
Quote:
A good friend called me tonight, he is having a 426 Hemi rebuilt and the bill for bushing the lifter bores was right at a thousand dollars. This was on a MP block.
Is he having Key Way lifters fitted?
Thats what iam thinking JESEL keyway bushings are 35ish each
No they are standard bushings. He will be using Crower lifters.
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Re: BUSHED LIFTER BORES IN STOCK BLOCK.............
[Re: mbogina]
#1056085
08/22/11 06:50 AM
08/22/11 06:50 AM
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Joined: Oct 2005
Posts: 976 ontario canada
mac56
super stock
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super stock
Joined: Oct 2005
Posts: 976
ontario canada
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Quote:
Try priming a BBM or Hemi with the intake off it and watch the GALLONS of oil that push by the lifter bores. We frequently run only standard oil pumps in bushed motors, no HV needed, and we also frequently need to REDUCE the oil pressure in those same motors after controlling the massive leaks from the lifter bores.
I have primed without valley pan and it was frightening how much oil comes out around the bottom of the lifter.
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