So im starting this damn thing over. Too many variables in the last one.

whats the best heads i can buy for around 2500 for a 600-650 fwhp engine.

 

trickflow 235s...JMOP

 

+1 or possibly the new LS7 small bores from TSP once they are released.

 

I have those on my 402, I think they are a great head. Got mine from Jon @ TSP.

 

Advanced Induction


They have many options at or below that price point. Send them an email. You won't be disappointed when you buy from them and run the numbers.

 

Go ported trickflow

 

the ls7 small bores are reallllly realllly interesting. how did you guys find out about these?

and what would be the advantage to having these heads over aftermarket ls3 heads.
i looked on the website and i couldnt find any of these LS7 (ls3) heads anywhere.

and how much are they.

 

https://ls1tech.com/forums/generatio...-ls3-bore.html

The heads aren't out and only barely in the testing phase. No pricing has been released. I'd imagine the heads will be priced right with Texas Speed's other PRC heads.

 

another vote for TFS235's

 

Wish those heads would fit on my G8GT...

 

Ported LS7 heads fully assembled......400+ cfm @ .650

Thats what I'm using, just about that price too.

.

 

That would be great if you could use them on a 4.070 bore, id be running them if that was the case. The OP is building a LS3 427 so those won't work without re sleeving the block.

 

Oops.....I had 4.125 bore in my head thinking of a 427................

.

 

Do you have the LS3 heads that came with block originally? If so, getting these ported might get you to your goals for less cash and a more stealthy look. With 427 inches and the right cam, 600 fwhp might be within reach of stock LS3's.

 

so whats the difference between ls3 heads ported and polished and the ls7 (style) heads ported and polished.

im not doing a heavy cam. NOT doing it.
so im going to have to get 600-650fwhp. with a mild cam.
i do NOT want this car to guzzle gas when im not on the peddle.

 

Your LS3 heads would get the job done. Nice CNC port job and a mild cam. I figure I am making over 600 fwhp with mildly ported L92's on a 11.5 to 1 370. Cam is a 231/239 614 624 114+3. Drives great and pulling 18mpg in Houston traffic. Over 20 on freeway. Put down 504hp at 6500 thru 5.13 gears and 30.5 tires. It is a T56 in the JG truck. Lite weight valves and valve train will help also...

 

nice numbers midevil1!

 

Thanks a lot... Engine has more in it. I think it's all in the combo. Engine has all the right parts in all the right places. I just don't see how you can go wrong with the production heads..???....

 

so getting some stage 3 ls3 heads would do the job.?

those would be a crazy improvment from the ls2 heads.


what would i have to do to use ls7 heads from an ls7. could i use a fast 102 intake and all the same components or would the ls7 heads require different intakes and what no.
i do know that the ls7 is the most different ls motor.

 

Bolt them on....slap a 102 Fast on and go.