MIKELMOTORCYCLE3398

iTrader: (3)

How much HP do you think I will pick up with this seap alone? I have a hotcam, LT's and CAI already. I can get the heads, gaskets and bolts for $500 Id like to see a 40hp gain on the dyno. U think its worth it?

Slimsilverado

iTrader: (5)

Your not gonna get 40hp IMO.

Marc 85Z28

iTrader: (8)

If measured at the crank, 35-40 seems reasonable.

wildcamaro

iTrader: (15)

If you get 40hp I will def be milling mine 30 thousandths lol

redtan

iTrader: (5)

Not even close on the 40hp. The 5.3 heads are already high comp, so milled 243s won't gain you that much compression. That said, the 243s are an improvement flow wise so you will get some power there. Just not 40hp.

wildcamaro

iTrader: (15)

My sentiments exactly...

MIKELMOTORCYCLE3398

iTrader: (3)

Thats what i was thinking. I want to mill to keep compression, just wonder if they flow that much better. I really need some more top end flow with the cam and figure this would provide it.

redtan

iTrader: (5)

The hotcam isn't exactly a big cam that needs killer head flow, especially on a 5.3.

Now if you had a decent cam in there, a set of 243s might gain you a good amount of power. On the tiny hot cam, not really.

SNLPerformance

iTrader: (15)

When Gm swapped to the 799 heads on a stock 5.3 I believe the difference was 15hp, you're getting a tiny compression bump milled and like mentioned the hot cam doesn't have anymore lift than a stock LS2 cam so I'd say 20-25hp is my guess.

garygnu

what I was thinking also ,15 rwhp gain .

learning101

ok now what if you add flat top pistons or dish better and deal with the lose compression

G Atsma

Who are you asking? You're replying to an 11-year old thread

1988montecarloss

iTrader: (6)

internet is hard