cjmatt

iTrader: (4)

Anyone tried LSA heads instead?

PRAY HRD

iTrader: (119)

If i didn't already have a fast intake i would have tried the lsa heads. They're stronger than a standard cast head so it's a decent budget head that should hold up to some extra boost before lifting when combined with studs.

CAMSTER

iTrader: (10)

Six bolts per cylinder is the answer...

Texas_WS6

iTrader: (9)

Those injectors should work fine. Same ones I have right now. The cam sounds pretty tame actually on my 408. Smaller engine it should sound a little more wild.

Texas_WS6

iTrader: (9)

That and some cash, only about 4 to 5k with block and heads.

PRAY HRD

iTrader: (119)

That's damn good to know! Thanks!!

68 SS

iTrader: (23)

I sold my motor and ordered an AES short block: LSX block,410'' callies magnum crank and callies ultra billet rods with coated CP pistons and I bought a set of LSA heads which I just got back from WCCH they CNC'd them and installed the new valves I also went with the 1/2'' head studs so I had the heads opened up while they were there. I plan on making as much boost as I can with the F1R and expect to be north of the magic 1000hp this is all going in my 68 Camaro once the short block arrives I plan on starting a build thread. Frost will be tuning the car once it is up and running again should be interesting!!

Texas_WS6

iTrader: (9)

Nice, keep us posted.

PRAY HRD

iTrader: (119)

What are the flow numbers as cast between the lsa's and 317's? Anyone know?

68 SS

iTrader: (23)

Richard from WCCH tells me the LSA program will flow the same as their L92 program. They cut 90% of the swirl wing out. I believe with the 1/2'' studs they will stay planted it is an experiment and if it does not work out I will replace them with the LSX L92 6 bolt heads seeing how I am married to my intake but I think they will take it they are a much cleaner casting of T6-356 and heavier than the L92 castings.

Beaflag VonRathburg

iTrader: (176)

^ Why for a slight increase in price did you not find a set of LS9 heads? They're a thicker decked head and you would have solved the head bolt issue with the 1/2 studs.

68 SS

iTrader: (23)

What leads you to believe they have a thicker deck?

Beaflag VonRathburg

iTrader: (176)

The LS9 heads have for a proven fact a thicker deck and use larger head bolts. The only differences between the L92 and LSA castings are the wings and roto castings.

LS9 = .625
LS3 / LSA = .500

cjg454ss

iTrader: (27)

ls9 dont have a thick deck, ls3,l92s, lsa have a 3/8th deck. i went through all of this and ended up with the 6 bolt l92s with the 5/8th deck, so far they hold over 1000rwhp with no signs of water leakage when disassembled.

i have also pushed stock l92s to 988rwhp without any water pushing on stock arp studs. i could of went more but ran out of injector that day.

68 SS

iTrader: (23)

I would be interested in seeing the supporting data and where it came from that backs up your measurements. As for why, to each their own I do not subscribe to the adage that you must use aftermarket heads to make big power.

cjg454ss

iTrader: (27)

read both these

https://ls1tech.com/forums/generatio...thickness.html

http://www.yellowbullet.com/forum/sh...2&postcount=19

cjg454ss

iTrader: (27)

http://www.yellowbullet.com/forum/sh...8&postcount=39

PRAY HRD

iTrader: (119)

Well "big power" has become a very relative term these days. 1000rwhp is no longer the big power it once was. 1500+rwhp certainly is though yet and i know of nobody making that kind of power on ANY stock casting head! There comes a level where you don't have a choice but to go with a .750" thick deck aftermarket casting.

fouroff

iTrader: (2)

I know this is an old post, but I'd be very interested in learning more about your friends build you mentioned here(forged LS3 w/GTS76). I'm going with a similar build and would like to compare notes on a few things if possible. Thanks.

Jeff

westtexasbuff

iTrader: (40)

Try again. Ported L92 heads, twin mp76s, 24lbs of boost, 1300 rwhp, never has pushed water, or had any issues.

http://www.youtube.com/watch?v=bjWwHPHxfi0