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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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.
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.
I think he is talking l92 block 427 Pat.
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.
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.
With a 427, unless you use a VERY small cam. It will sound very lopy...
LS7 heads want a 4.125 bore or bigger. You looking at a 4.070 bore.
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MSD 8.5mm Superconductor wires w/ NGK $68 delivered, custom length LS1 LT1. HKE Precision Racing Engines 347-500 cid N/A, N2O, FI applications AFR, TFS, All Pro, Edelbrock, Dart head cam specials Ron Davis Racing.. radiators and heat extractors finest in the business
So I guess that means a 427ci L92 has a different bore/stroke than a 427ci LS7?
Yep, just as Matt stated 4"stroke x 4.125 bore or 4.100 stroke x 4.070 bore.
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MSD 8.5mm Superconductor wires w/ NGK $68 delivered, custom length LS1 LT1. HKE Precision Racing Engines 347-500 cid N/A, N2O, FI applications AFR, TFS, All Pro, Edelbrock, Dart head cam specials Ron Davis Racing.. radiators and heat extractors finest in the business
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. Trick Flow 235cc vs. LS7 head
Street 427 
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