High revving valve/rocker/lifter combo LS3
12-24-2012, 03:25 AM
#1
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High revving valve/rocker/lifter combo LS3 Hello everybody. I had purchased a LS3 heads and started looking for some adjustable rocker arms and what? Surprise, surprise found the ones that I am can not afford, compcams for 1400$, they definitely nice piece of machining, but little bit over my budget.
The reason I am looking for adjustables, because I am planning to run a roller cam lightweight lifters with boosted 427 iron block topped with LS3 heads, spinn it to 7500 at least. The engine is only for drag race.
Could you share some combos or give me some tips, I am quite new with the LS engines.
The reason I am looking for adjustables, because I am planning to run a roller cam lightweight lifters with boosted 427 iron block topped with LS3 heads, spinn it to 7500 at least. The engine is only for drag race.
Could you share some combos or give me some tips, I am quite new with the LS engines.
12-24-2012, 08:30 AM
#2
Getting a good shaftmount rocker setup (jessel, TD) is going to be the best, less costly part (in the long run) for having a hi rpm engine. Going cheap will cost more, after you have to re do with good parts the 2nd time.
Either keep it under 7,500 and run the stock style hydro lifter cam. (stock type intake limited this too) Or go solid get good parts, and spin it what the valvetrain controls, and what your limited from the power adder? If you want to spin it over 7K
Either keep it under 7,500 and run the stock style hydro lifter cam. (stock type intake limited this too) Or go solid get good parts, and spin it what the valvetrain controls, and what your limited from the power adder? If you want to spin it over 7K
Last edited by studderin; 12-24-2012 at 08:36 AM.
12-24-2012, 03:17 PM
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Getting a good shaftmount rocker setup (jessel, TD) is going to be the best, less costly part (in the long run) for having a hi rpm engine. Going cheap will cost more, after you have to re do with good parts the 2nd time.
Either keep it under 7,500 and run the stock style hydro lifter cam. (stock type intake limited this too) Or go solid get good parts, and spin it what the valvetrain controls, and what your limited from the power adder? If you want to spin it over 7K
Either keep it under 7,500 and run the stock style hydro lifter cam. (stock type intake limited this too) Or go solid get good parts, and spin it what the valvetrain controls, and what your limited from the power adder? If you want to spin it over 7K
What are the good lightweight solid roller lifters? was looking at these : http://www.briantooleyracing.com/mor...r-lifters.html
LS1 style solid lifters are more affordable, even adjustable one's, unfotunatly :-)
Last edited by Tomis; 12-25-2012 at 03:13 AM.
12-27-2012, 07:52 PM
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I guess I am going to stick to stock rockers with comp upgrade, just need to find a good lifter/spring/cam combo to work to 7500rpm.
Does anybody have ls3 stock rockers for cheap, I neeed bolts pedestals and rockers, since the heads that i bought are bare.
Does anybody have ls3 stock rockers for cheap, I neeed bolts pedestals and rockers, since the heads that i bought are bare.
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12-27-2012, 08:58 PM
#8
I'd do stock rockers, comp upgrade, hollow-stem valves (if true ls3 you have), and something like PAC 1521 springs and Morel 5206. I'd also go with some Manton 3/8" pushrods tapered down to 5/16" ends to fit the heads.
Then you could probably look at an endurance lobe profile. That's going to be most critical. One of the better ones I know of is EHI/EHX lobes from Comp Cams.
Then you could probably look at an endurance lobe profile. That's going to be most critical. One of the better ones I know of is EHI/EHX lobes from Comp Cams.
Last edited by JakeFusion; 12-27-2012 at 09:14 PM.
12-28-2012, 03:27 PM
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So far I have a 221/221, 112 from Stock48, Issky chrom molly pushrods, LS7 lifters and Brian Tooley spring and titanium retainer kit: 155 lbs @ 1.780", 380 lbs @ 1.180", 400 lbs @ 1.130, coild bind @ 1.070". How does that combo looks like?
12-29-2012, 11:50 AM
#17
Here's a video of a turbo combination I setup with heads/cam. It has the same springs you have, stock rockers, LS3 intake valves, turning it 7300 rpm through the traps. This isn't his best pass, he went 5.20's in the 1/8 mile. But with turbos, why do you want to turn it 7500 rpm? What intake are you running?
