ls2/l92 heads, cam without flycutting
ls2/l92 heads, cam without flycutting Title says it all really, whats the largest cam I can run without flycutting using a stock ls2 bottom end and l92 heads, just would like to know the max limit (roughly) so I can pick a cam within limits.
Or may just go with 243s
car will be a 91 bird street/strip mostly strip.
Or may just go with 243s
car will be a 91 bird street/strip mostly strip.
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From: ELSA, South TEXAS (956) 802-7700
as for a few factors, they are due to the l92/ls3 heads having alot bigger intake valves and. these factors include: cam duration, cam lsa, head milling, and gasket thickness.
spinmonster on corvette forum recommends a comp 230 234 612 598 114+2 for manual and comp 228 232 588 595 114+4 for autos. on my lq9 with ls3 heads, i went with the 228 232 and hope to enjoy in the next couple of days.
i was concerned about lift over 600 and spring life so kept under. my heads are milled .015 and i will be using cometic .040 gaskets as also recommended by the spinmonster. he made 465 and 471 rwhp with these combos and has spent considerable time dyno and actual drive testing.
good luck with your project.
spinmonster on corvette forum recommends a comp 230 234 612 598 114+2 for manual and comp 228 232 588 595 114+4 for autos. on my lq9 with ls3 heads, i went with the 228 232 and hope to enjoy in the next couple of days.
i was concerned about lift over 600 and spring life so kept under. my heads are milled .015 and i will be using cometic .040 gaskets as also recommended by the spinmonster. he made 465 and 471 rwhp with these combos and has spent considerable time dyno and actual drive testing.
good luck with your project.
Last edited by low2001gmc; Sep 24, 2012 at 10:28 AM.
So I'm looking at under .600 lift and 230 intake duration. I'm running a carb on this so I'd like to tighten up the lsa if I could to say 110-112, can I run any lobe profile (lsr, lsa etc) or do I need to stay mild on the ramp rates. I've searched but no specific answers
Also I'd like to have around 10:5:1 scr so mill around .20? Using a stock head gasket. ( first goal is avoid ptv issue compression comes 2nd).
Here's kinda what I'm thinking
6.0 with ls2 pistons rods
L-92 heads milled for 10:5(light clean up porting)
1 7/8" headers
Single plain carb intake
750 Cfm carb
And probably a pat g spec'd cam probably around 230-235 59x-59x with a 112 but I'm just guessing lol.
Anything sound..off?
Here's kinda what I'm thinking
6.0 with ls2 pistons rods
L-92 heads milled for 10:5(light clean up porting)
1 7/8" headers
Single plain carb intake
750 Cfm carb
And probably a pat g spec'd cam probably around 230-235 59x-59x with a 112 but I'm just guessing lol.
Anything sound..off?
Mine is a 230-236 629/629...ported milled LS3 heads on a LS2.. Done by New Era.. Feels awesome on the streets right from 2500rpm!
Last edited by Johnnystock; Aug 28, 2012 at 02:22 AM.
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Honesly id like 500whp but im not stuck on numbers to bad, as far as weight goes im shooting for 3300-3400 but im still building the car.
Our stage 2 "street heat" cam for LS1/LS6 engines would work well. http://www.tickperformance.com/tick-...1-ls6-engines/
It is 231/238 .617"/.615 113+3.
You really should measure for PTV when milling anything as you never know if the machinist took "a little" too much more off than what he was suppose to do.
It is 231/238 .617"/.615 113+3.
You really should measure for PTV when milling anything as you never know if the machinist took "a little" too much more off than what he was suppose to do.
Last edited by Sales@Tick; Sep 7, 2012 at 09:02 PM.
We have used our 231/236 .641/.615 cam a number of times with those heads with quite a bit of success. I would never guarantee 500rwhp but we have had a couple customers reach that power level, especially if the heads are ported.
With the same general setups most anyone is going to lead you to the same approximate specs. In similar fashion to those above, our cam for that is a 230/236 .610/.612
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In the duration range we are all quoting the LSA is not going to change PTV enough to cause any issues. Mine isn't set on one LSA only. On some we use 115, some we use a 113. I know Texas Speed offers options as well.
I personally would recommend flycutting regardless so you can mill the heads and/or use a thinner head gasket to get compression up. It's an important step towards getting the most out of your total setup.
I personally would recommend flycutting regardless so you can mill the heads and/or use a thinner head gasket to get compression up. It's an important step towards getting the most out of your total setup.
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800-456-0211 / PM / Facebook
WHIPPLE Superchargers, Procharger, Magnuson, Powerbond Sale, HPTuners packages!, Trickflow, AFR, PRC, CHE Trunion upgrade, $100 7.400" pushrod set, Custom Cam of your choice
800-456-0211 / PM / Facebook
WHIPPLE Superchargers, Procharger, Magnuson, Powerbond Sale, HPTuners packages!, Trickflow, AFR, PRC, CHE Trunion upgrade, $100 7.400" pushrod set, Custom Cam of your choice