Bowtiejoni

Hello,

Please recomend me set of cylinderheads for the 415 cid LS3.
Goal is to get +500 real life hp and as much torque as possible.
100% street driven. No wild cam or power adders.

GMPP has cnc ported LS3 heads about 1300 pair. Are they good?

Bowtiejoni

gnx7

iTrader: (28)

The power is in the heads..... if you only want 500rwhp a set of stock LS3 heads with good valve springs will get the job done with a 11:1 or higher 416. If you want 50-75rwhp more... you want better heads.

For about $2400/pair you can get the Dart Pro1 LS3 heads that flow 370cfm..... Running a stock LS3 intake on them would be choking them a bit....

http://www.enginelabs.com/engine-tec...ead-from-dart/

Bowtiejoni

Thanks Gnx7. I think I will go with gmpp heads. 500+ is my target.

DavidBoren

I'm pretty sure that stock LS3 heads and a stock LS3 intake will get you 500rwhp on a 415ci motor with a well spec'ed custom cam and a good exhaust.

Those Dart Pro1 heads have made 700hp at the flywheel on a 402... SpeedTrigger's build if I remember correctly.

I am a fan of cathedral port heads, so naturally I would suggest Tony Mamo's MMS 235's, but that requires a new intake an may not be at all what you are looking for.

Bowtiejoni

Hello David,

I think I will go with gmpp cnc heads. Intake will be "carburator" model with holley ls3 terminator tbi efi. I need the looks of the classic sbc

1989GTA

Those heads will be just fine for your goals.

Frankenstein

Bowtiejoni,


We've got an excellent program if you're interested. Good luck with your build!


-Russ

BFASTNOTLAST

^^^ I second this!

smaz632

Im interested in your program Russ. Could you give us a ballpark $ wise on what it would cost to do a set of 821's? Thanks.

Bowtiejoni

Russ, yes I am I give you an email.

Bowtiejoni

Russ your email wont work. Send you an pm.

Frankenstein

smaz632,


Our Stage 1 package for 821s are $1350 + shipping. Pm me for more details! Thanks for the inquiry!


-Russ

big hammer

Gmpp ported ls3 heads are a bargain and works easily meet your goals. Some say they don't flow as advertised though

Hardcoresoldier

iTrader: (2)

yea, they are a good bang for the buck head

Bowtiejoni

1KillerSS

Stock heads will flow over 1000whp FI. Your obviously not going FI, but a 415 LS3 can hit 500 easy with stock heads.

Joeking1025

iTrader: (1)

I did Tony Mamo 223 sportsman cathedral heads and a fast 102 on my 416 with a 237/44 624/615 114 +2 and came out with 529 and 518 to the wheels

wannafbody

iTrader: (2)

Bobby Stipkovic ran a 10.45 in a pretty much full weight TA with minitubs on a 416 LS3 stroker with STOCK LS3 heads (not ported).

Bowtiejoni

Really good, is that btr cam?