Tirefire

iTrader: (1)

What does everyone here think about these two heads on a 390 block. I'm trying to find out if one head is better than the other for FI. I'm planning on pushing 14 psi on a D-1 and was hoping to get as much power on pump gas without pushing water. Anyone have any experience with the LS3 head since I really don't see to much of it on the FI forums.

Rickys S/C Z28

iTrader: (13)

A good buddy on mine has a 5th gen camaro with a cam and LT with A d1 and it made 651RWHP thew a A6.....I wish to god i had a 4 in bore motor just so i could use the LS3 heads

Tirefire

iTrader: (1)

Thats awesome!!! Does anyone else have good things to say about LS3 heads.. Whats the max power I can get out of the 370, EPP cam and LS3 heads with my D-1. Just curious to know what people have made with this kind of setup..

BigRich954RR

iTrader: (1)

if you dont have the heads yet and only looking to do 800 hp and under get the ls3

rotary1307cc

iTrader: (5)

^^^ good ballpark

Tirefire

iTrader: (1)

Well I'm looking to get as much RWHP as I can possibly get, but I figured the Ls3 head flows better and would probably give me more gains than the 317's. I spoke to the builder of the block and he advised that the block could go as high as 1000 rwhp but with a bigger hairdryer. Where you thinking of another head, besides the ls3 or 317?

gnx7

iTrader: (28)

If you want to make big power start out with a 4.0" bore block or larger....

lt1773

iTrader: (1)

if you plan to run just under 800rwhp i would recommend the ls3 heads

lt1773

iTrader: (1)

https://ls1tech.com/forums/forced-in...t-results.html