Re: BROKEN INTAKE VALVE SPRINGS?
[Re: 68HEMIRR]
#2242185
01/27/17 11:49 AM
01/27/17 11:49 AM
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Joined: Jan 2003
Posts: 13,385 Marion, South Carolina [><]
an8sec70cuda
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Like Fast68 said, I think you just went wayyy too long without changing springs! Your cam must be a much more aggressive profile than the one that Fast68 spec'd for me b/c my springs are only 220# on the seat and 600# open. I change mine out at freshen ups (usually in the 3-4k mile range) and never even check them. I don't want to be tempted to reuse them. I've sent my Isky Red Zone lifters back twice for a checkup and had them returned w/ a note saying no work needed. They are not the EZ Roll bushed lifters...those weren't available in 2006 when I built mine.
What's the rest of the combo if you don't mind me asking? Any timeslips? YOU RAN A 8.91@150......whats your combo if you don"t mind? 572" KB block, 4.5" Callies crank, 7" Oliver steel rods, 11:1 Diamond pistons, pump gas CNC ported MP aluminum heads by MCH 276°/284° at fifty, .672"/.651" lift, solid roller (spec'd by Fast68plymouth), PAC 1243 springs, DLI roller rockers, Manton .134" wall pushrods Barton single 4500 manifold, 1200 cfm Pro Systems dominator TTI 2.25" pri., 4" collector headers, 4" exhaust 727, 9" 5k stall, 4.10 gear Dana 60, Cal-Tracs, 295-65 drag radials N/A it has run 9.54 at 140.4 mph, 1.320 sixty foot. That was on pump gas at about 3800 lbs. On about a 225 hp hit of nitrous it went 8.91 at 150, 1.310 sixty foot (delaying the hit) at 3900 lbs.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: BROKEN INTAKE VALVE SPRINGS?
[Re: an8sec70cuda]
#2242286
01/27/17 03:01 PM
01/27/17 03:01 PM
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Joined: May 2013
Posts: 80 new york
68HEMIRR
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Like Fast68 said, I think you just went wayyy too long without changing springs! Your cam must be a much more aggressive profile than the one that Fast68 spec'd for me b/c my springs are only 220# on the seat and 600# open. I change mine out at freshen ups (usually in the 3-4k mile range) and never even check them. I don't want to be tempted to reuse them. I've sent my Isky Red Zone lifters back twice for a checkup and had them returned w/ a note saying no work needed. They are not the EZ Roll bushed lifters...those weren't available in 2006 when I built mine.
What's the rest of the combo if you don't mind me asking? Any timeslips? YOU RAN A 8.91@150......whats your combo if you don"t mind? 572" KB block, 4.5" Callies crank, 7" Oliver steel rods, 11:1 Diamond pistons, pump gas CNC ported MP aluminum heads by MCH 276°/284° at fifty, .672"/.651" lift, solid roller (spec'd by Fast68plymouth), PAC 1243 springs, DLI roller rockers, Manton .134" wall pushrods Barton single 4500 manifold, 1200 cfm Pro Systems dominator TTI 2.25" pri., 4" collector headers, 4" exhaust 727, 9" 5k stall, 4.10 gear Dana 60, Cal-Tracs, 295-65 drag radials N/A it has run 9.54 at 140.4 mph, 1.320 sixty foot. That was on pump gas at about 3800 lbs. On about a 225 hp hit of nitrous it went 8.91 at 150, 1.310 sixty foot (delaying the hit) at 3900 lbs. Wow thats awesome....looks like the 5k stall/caltracs and 1200cfm makes a big difference compared to mine....when i get it together i am dying to find out what mine will do......thanks
BORN TO BE WILD
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Re: BROKEN INTAKE VALVE SPRINGS?
[Re: 68HEMIRR]
#2242289
01/27/17 03:04 PM
01/27/17 03:04 PM
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Joined: Jan 2003
Posts: 19,382 Las Vegas
Al_Alguire
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Your problem on a hemi depending on the car it is in is going to be removing exhaust springs on the car. LSM may make an on head tool as well as Buxton http://www.buxtonengineering.com/on_head_valve_spring_compressor.phpFWIW when I ran a Hemi we had spray bars for just the reason DT is referring to. For what you are doing you wont find a set it and forget it option for sure. But would be nice. I would run the PAC stuff personally. I could be biased as my brother in law is a big wig at Peterson Spring, the parent company But I do feel they make the best race springs out there, coil, valve, torsion bars and so on
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: BROKEN INTAKE VALVE SPRINGS?
[Re: 68HEMIRR]
#2242291
01/27/17 03:08 PM
01/27/17 03:08 PM
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Joined: Jan 2003
Posts: 19,382 Las Vegas
Al_Alguire
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My stuff was a KB block B1 head deal. Hot lash was .016 on both..My current Predator is a World block with about .003 cold and .022 hot. I have another KB B1 engine as well that has .028 hot and .012 cold.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: BROKEN INTAKE VALVE SPRINGS?
[Re: dthemi]
#2242293
01/27/17 03:11 PM
01/27/17 03:11 PM
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68HEMIRR
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Just something to look at. The 2 shaft rocker systems, even SV are hard pressed to keep oil on the intake springs at idle, and low rpm. Even reved there isn't much there. Heat is what I've seen break springs more than cycles,(save coil bind) and really high rpm stuff that would never be street driven anyway. Maybe consider a spray bar to help keep them cool.
My personal spring choice is PSI. PAC also makes a great spring. would only run these two spring makers period.
is there a post to see how and where to buy spray bars....that makes sense......would like to do that i am going with PAC....thanks
BORN TO BE WILD
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Re: BROKEN INTAKE VALVE SPRINGS?
[Re: 68HEMIRR]
#2242296
01/27/17 03:16 PM
01/27/17 03:16 PM
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Joined: Jan 2003
Posts: 19,382 Las Vegas
Al_Alguire
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We made our own that were epoxied into the valve cover.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: BROKEN INTAKE VALVE SPRINGS?
[Re: Al_Alguire]
#2242301
01/27/17 03:21 PM
01/27/17 03:21 PM
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68HEMIRR
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Your problem on a hemi depending on the car it is in is going to be removing exhaust springs on the car. LSM may make an on head tool as well as Buxton http://www.buxtonengineering.com/on_head_valve_spring_compressor.phpFWIW when I ran a Hemi we had spray bars for just the reason DT is referring to. For what you are doing you wont find a set it and forget it option for sure. But would be nice. I would run the PAC stuff personally. I could be biased as my brother in law is a big wig at Peterson Spring, the parent company But I do feel they make the best race springs out there, coil, valve, torsion bars and so on yeah i souldve never sold my spring compressor ..that buxton setup looks like a fine tool but not for tight quarters...the one i had bolted off the stands with 4 bolts and was tight on the exhaust but did work.....i dont know why they stopped making them....yep going with PAC.....thanks
BORN TO BE WILD
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Re: BROKEN INTAKE VALVE SPRINGS?
[Re: second 70]
#2242303
01/27/17 03:26 PM
01/27/17 03:26 PM
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Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
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Dwayne I have a crane solid roller in my 426 with 200# closed 455# open lift in 587 ex 568. Calls for .020 lash hot set at .012 cold aluminum heads cast block. Street driven. How often should I change out the springs?
Thanks Mike Obviously there is no hard and fast rule for this, as a lot of it would depend on how the vehicle is used........ How many runs down the track per spring cycle, if it's run into valve float at all, whether it's lots of high speed interstate driving, or mostly around town and back roads, etc....... Along with the quality of the springs being used. Do you know what brand and part number springs are in the motor now? Since it's so much "fun" to swap out valve springs on a hemi with the motor in the car, I would use a pretty tame set of street friendly lobes(like you have), and the best springs I could put in it, to extend the service interval as long as possible.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: BROKEN INTAKE VALVE SPRINGS?
[Re: 68HEMIRR]
#2242305
01/27/17 03:32 PM
01/27/17 03:32 PM
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Joined: Jan 2003
Posts: 19,382 Las Vegas
Al_Alguire
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The Buxton and LSM spring compressors both bolt in to shaft bolt holes..Was yours an old MP deal? Would not be hard to make one really
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: BROKEN INTAKE VALVE SPRINGS?
[Re: Al_Alguire]
#2242309
01/27/17 03:43 PM
01/27/17 03:43 PM
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68HEMIRR
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The Buxton and LSM spring compressors both bolt in to shaft bolt holes..Was yours an old MP deal? Would not be hard to make one really no its all stage v....stands and roller rockers
BORN TO BE WILD
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Re: BROKEN INTAKE VALVE SPRINGS?
[Re: 68HEMIRR]
#2242317
01/27/17 03:52 PM
01/27/17 03:52 PM
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Joined: Jan 2003
Posts: 19,382 Las Vegas
Al_Alguire
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Those both bolt to stands or shafts, IF they make one for that head. I would imagine Buxton does last I checked LSM did not but that was a few years ago. I have both and they are very good pieces, inner fenders are the issue Only way to find out is give them a call
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: BROKEN INTAKE VALVE SPRINGS?
[Re: Al_Alguire]
#2242320
01/27/17 03:56 PM
01/27/17 03:56 PM
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68HEMIRR
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ok....thanks ....my inner fenders are the problem.....this would be fine if i pulled the motor.....that looks like a stout beefy compressor.....this was the tool [img:center] https://goo.gl/images/vPjieB[/img]
Last edited by 68HEMIRR; 01/27/17 04:06 PM.
BORN TO BE WILD
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Re: BROKEN INTAKE VALVE SPRINGS?
[Re: 68HEMIRR]
#2242346
01/27/17 04:47 PM
01/27/17 04:47 PM
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Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
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Just another thought on the spring choice...... I would use the PAC 1344 instead of the 1244, especially in this application.
The 1344 is the nitrided, higher endurance version of the 1244.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: BROKEN INTAKE VALVE SPRINGS?
[Re: 68HEMIRR]
#2242437
01/27/17 08:11 PM
01/27/17 08:11 PM
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68HEMIRR
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i almost called John at Bullet Cams to order the 1244"s....glad you mentioned this.....thank you
BORN TO BE WILD
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Re: BROKEN INTAKE VALVE SPRINGS?
[Re: 68HEMIRR]
#2242533
01/27/17 11:20 PM
01/27/17 11:20 PM
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Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
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Not sure on the springs The float on the cam is 8200 max power rpm 7600 I have the shift light at 6500 and rev limiter at 7200. It has plenty of pull left at 7200 but with a 4 speed I wanted to play it on the safe side. I try to keep it around the 6500 and most times it's only running 4500 tops. I guess "if it were me", I'd probably pull a few intake springs off at around 4000 miles and test them for pressure, as well as look at the overall condition of the shims/retainers/locks to see if there are signs of "unhappiness", and make a decision on whether to replace the springs at that time based on what I saw. To put the OP's situation into a little perspective........ Using very rough guesstimates....... 10,000 miles, at an average speed of 50mph is 200hrs. If the average rpm over the entire 200hrs of use is 2500rpm, with the cam running at 1/2 speed(1250 cycles per min), 60 mins per hour(75,000 cycles per hour), for 200hrs...... That's 15,000,000 cycles.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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