ls3/l92 topend with custom cam on 408/414 500rwhp?
04-12-2013, 04:24 PM
#21
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I just picked up some 5364 heads.
I still nee rockers though, so will LS3 rockers be fine (offset)?
I am contemplating a 408+ ls2 aluminum block with those heads and a ls3 intake.
Im looking for 450/450 streetable and reliable.
Im picking up a shortblock and getting the rotating customized to my liking.
What compression would this work best with? 11:1? 11.5:1? Id like to remain about the 20mpg range
I still nee rockers though, so will LS3 rockers be fine (offset)?
I am contemplating a 408+ ls2 aluminum block with those heads and a ls3 intake.
Im looking for 450/450 streetable and reliable.
Im picking up a shortblock and getting the rotating customized to my liking.
What compression would this work best with? 11:1? 11.5:1? Id like to remain about the 20mpg range
04-12-2013, 06:04 PM
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04-15-2013, 12:28 AM
#26
YES i disagree with your statement about shrouding and giving the impression to others that they wont work well with anything less than a 4.060 bore. Everyone is entitled to an opinion but too many stock bore 6.0s with ls3/l92 heads out there that are making lots of power.
11.90s in a heavy truck. would be much faster in a car. Not dyno tested as I dont like dynos as they vary from type to type and stalls among other things affect numbers.
11.90s in a heavy truck. would be much faster in a car. Not dyno tested as I dont like dynos as they vary from type to type and stalls among other things affect numbers.
I have a set of TEA Ported L92 Heads on a 4.030 Bore right now..and it's not cuttin it. I'm about to put them on a 4.135 Bore....and I bet it wakes the hell up. Smaller bores shroud these Heads. That is a FACT.
I have researched the *** out of these L92/LS3 Heads. My opinion is you should gather some more facts before posting misleading information. Smaller Engines are making power, yes. Bigger Engines make MORE power with these Heads..tons more power.
No replacement for displacement.
Last edited by the_merv; 04-15-2013 at 12:44 AM.
04-15-2013, 03:02 AM
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So Merv, what do you think the limit of hp/ torq would be with an LS6 cam, 4.005" bore, and the l92 heads, using the stock LS3 intake, with shortie's?
I am thinking that it might be hard to get less than 380/380 at the rear wheels? Or about 475/475 at the Flywheel; are you saying that it will not do it with the 4" bore?
I am thinking that it might be hard to get less than 380/380 at the rear wheels? Or about 475/475 at the Flywheel; are you saying that it will not do it with the 4" bore?
04-15-2013, 12:52 PM
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04-15-2013, 01:34 PM
#32
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you have an actual track time?
I have a set of tea ported l92 heads on a 4.030 bore right now..and it's not cuttin it. I'm about to put them on a 4.135 bore....and i bet it wakes the hell up. Smaller bores shroud these heads. That is a fact.
Aluminum engines are being taken out .010 max on that stock bore..and that is if need be.
I have researched the *** out of these l92/ls3 heads. My opinion is you should gather some more facts before posting misleading information. Smaller engines are making power, yes. Bigger engines make more power with these heads..tons more power.
I'm putting together a 430ci lsx (4.000 stroke, 4.135 bore) with my tea l92 heads(flow ~350/280 cfm @ .600, 4.030 bore), efi vic jr, at 12.3:1 compression and the current cam i have now. Something tells me that it'll make more power than your 6.0l with "ported" ls3 heads. The purpose with me building this is to flow the heads i have.
No replacement for displacement.
I have a set of tea ported l92 heads on a 4.030 bore right now..and it's not cuttin it. I'm about to put them on a 4.135 bore....and i bet it wakes the hell up. Smaller bores shroud these heads. That is a fact.
Aluminum engines are being taken out .010 max on that stock bore..and that is if need be.
I have researched the *** out of these l92/ls3 heads. My opinion is you should gather some more facts before posting misleading information. Smaller engines are making power, yes. Bigger engines make more power with these heads..tons more power.
I'm putting together a 430ci lsx (4.000 stroke, 4.135 bore) with my tea l92 heads(flow ~350/280 cfm @ .600, 4.030 bore), efi vic jr, at 12.3:1 compression and the current cam i have now. Something tells me that it'll make more power than your 6.0l with "ported" ls3 heads. The purpose with me building this is to flow the heads i have.
No replacement for displacement.
not gonna get into a pissing match here. facts are as you stated your combo aint cutting it. mine on the other hand is. i am happy
and would be glad to help you or anyone with a combo build.
04-15-2013, 05:04 PM
#33
No pissing match here..just what we've found out. That 11.46 was a run on just getting a baseline with the new Cam..if I had the opportunity to run another pass I have no doubt it would've been low 11.2's after the adjustments..then getting faster as I dialed it in more.
I plan on making more than 650 NA so I guess I have the Heads for it.
Hard to say..The Shortie's will hinder it since these Heads move air..
I plan on making more than 650 NA so I guess I have the Heads for it.
So Merv, what do you think the limit of hp/ torq would be with an LS6 cam, 4.005" bore, and the l92 heads, using the stock LS3 intake, with shortie's?
I am thinking that it might be hard to get less than 380/380 at the rear wheels? Or about 475/475 at the Flywheel; are you saying that it will not do it with the 4" bore?
I am thinking that it might be hard to get less than 380/380 at the rear wheels? Or about 475/475 at the Flywheel; are you saying that it will not do it with the 4" bore?
04-15-2013, 07:03 PM
#34
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stock bottom lq4 10.5 comp
stock 821 heads milled 40
stock l92 truck intake
92 t/b
230/238 cam
1 7/8 headers
3 inch x pipe
6 spd
steel d shaft
410 gear
465/432
so there is no way you cant make 500whp with a 408 with stock ls3 heads
stock 821 heads milled 40
stock l92 truck intake
92 t/b
230/238 cam
1 7/8 headers
3 inch x pipe
6 spd
steel d shaft
410 gear
465/432
so there is no way you cant make 500whp with a 408 with stock ls3 heads
04-15-2013, 10:53 PM
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04-16-2013, 01:14 AM
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Glad I read this post, I am also researching a way to get 500rwhp out of my ls2. So far all I have come across is countless posts referring to LS3 heads/cam, but is 500hp obtainable with the stock ls2 manifolds? I am trying to avoid long tubes as ground clearance has always been an issue on third gen camaros.