Street 427
Street 427 Ok lets hear it. I want to get a 427 built for the street. If you were to build up a ls3/l92 427 that had manners to drve everyday on the street, which parts would you use? Looking for 525 rwhp through a stick. If any of you sponsors can shoot me prices and suggestions that would be great! Thanks!
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With the LS7 intake manifold being sooooo much better than anything available for the LS3/L92s, I'd have to recommend LS7 heads/intake on top of whatever 427 block you choose. 525rwhp is so easy to make with those heads. The intake manifold is one of the key components.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
Can you put LS7 heads on an ls3/l92?
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you could use LS7 heads and intake if you wanted. I put L92 heads and L76 intake on my 427 and love it. I got everything through Texas Speed. It made 534hp in a locked A4. Should be easy to make 525 on a stick.
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Shoot me an e-mail with what you have in mind and I will put together a detailed quote for you. I think I helped with some parts at my last job 
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Verdad Gallardo With the LS7 intake manifold being sooooo much better than anything available for the LS3/L92s, I'd have to recommend LS7 heads/intake on top of whatever 427 block you choose. 525rwhp is so easy to make with those heads. The intake manifold is one of the key components.
If not, Pat is completely correct. You would have to be a complete moron to NOT make 525 rwhp with a ls7 topend.
This is a good question Superman09 and is basically a similar boat as I am in right now also. (427 any block, 525rwhp ballpark, 6spd)
My only addition would be to add that, being a daily driver motor, I would like to pick parts that can optimize that as much as possible unless it means I can't have a heavy lope.
My only addition would be to add that, being a daily driver motor, I would like to pick parts that can optimize that as much as possible unless it means I can't have a heavy lope.
This is a good question Superman09 and is basically a similar boat as I am in right now also. (427 any block, 525rwhp ballpark, 6spd)
My only addition would be to add that, being a daily driver motor, I would like to pick parts that can optimize that as much as possible unless it means I can't have a heavy lope.
My only addition would be to add that, being a daily driver motor, I would like to pick parts that can optimize that as much as possible unless it means I can't have a heavy lope.
That is correct! LS7 427 is a 4" stroke, the 427 LS3 is a 4.1" stroke.
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POWERBOND - ASP - AND MORE!
Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
I just built a 4.070" bore iron block (cause I'm cheap) with a 4.100" crank, TFS 235's and a crappy Weiand aluminum intake (back to the cheap thing) and it made 635 HP 580 TQ on an engine dyno. It made killer average torque. A TFS head with a Fast intake will make as much power as a LS7 setup and a lot more average torque. Here is the dyno sheet compared to the TFS 440 with a ported Fast intake. And a link of the TFS 440 with an unported Fast versus LS7 heads and intake out of the box. https://ls1tech.com/forums/showthrea...ls7+vs+235+tfs
Last edited by Brian Tooley Racing; Aug 25, 2008 at 02:40 PM.
