Pontiac Derek

iTrader: (6)

anyone hear running 11.25:1 or higher on Pump Gas DD successfully? what cam? converter? intake? thanks

dirt track racer 81

iTrader: (45)

I was with my ls6 heads milled. vic jr 244/248 .612/.615 112 lsa 4.56 3200 stall. i was around 11.7:1

Pontiac Derek

iTrader: (6)

Thanks !My 383 stroker 5.3 block is just about done at the machine shop and i'm just about to order pistons, i went with a different cam than i planned, was 224-230 but found a nice Comp XER used-232-234 at 50 .600 lift 112lsa Hand Ported Dart 205cc heads, coated chambers/valves/ex ports, planned vert is a 3000-3200 Yank SC with 3.42 gears for now then when i can 4.10's will go in, I want to go with 11.5:1 with this engine so i'm just curious if anyone else is doing the same, thanks for the replies! Pistons will be either Top and side Coated Manley's or top and side Coated Wiseco's with offset pins and steel rings ect, My local fuel is 91-92 octane fwiw

jophuss36

iTrader: (1)

11.65:1. But it's all about your dynamic compression ratio not so much stAtic

acethedragon

iTrader: (2)

true. ls motors can handle higher cr than previous motors. just combine it with the proper cam to bleed off low end cylinder pressure which is where detonation tends to happen. up higher in the revs its less likely, but be sure your tune is spot on either way

Pontiac Derek

iTrader: (6)

Yep, i understand, just wanted to see if any of you guys are, How do you like that cheater cam you have?

budhayes3

iTrader: (19)

A single pattern cam with a tight LSA and a lot of duration is good for higher SCA engines...

Phantom

iTrader: (16)

Around 11.5:1 here on 91 octane

MPFD

iTrader: (5)

yeah, on the street but I don't really get on it much on the street. No use it has no hope of hooking, Maybe a ricer drift through a roundabout now and then just to impress the kids. But when I'm at the track I run VP with my spray...

1slow01Z71

iTrader: (36)

Its not necessarily the low end where you'll get detonation, its most likely going to happen at peak torque.



My buddy closet red neck on here was running 12:1 in his head and cam 5.3. It was a tempermental bastard but ran like a scalded ape. I believe he still has the heads and cam laying in his garage if youre interested.