Sizzlenut

iTrader: (1)

My buddy broke some manifold bolts in his LQ4 iron heads on his plow truck (snowplow) and figured he'd freshen up the heads while he needs to work on them. I have a set of low km LS1 heads I pulled off my engine that we might throw on. Anyone try this? I'd put on some patriot golds while we have it out for durability. Any tuning would be required? Would he need to run premium going from a 72cc head to a 67cc? We'd keep the same cam to keep the low end torque higher for plowing.

Sizzlenut

iTrader: (1)

Any input at all?

726.0chevelle

iTrader: (17)

i think the ls1 heads would do better than the iron heads for sure the iron headed motors are rated 20 hp less than the aluminum headed motors with the same cam and compression deff. have to run super prob. need a retune on the computer

bulldogSS

iTrader: (2)

i just put some ported ls1 heads on my lq9. they will fit for sure.

sroach20

iTrader: (31)

it will up the compression and give some good midrange power.