Terry Burger

iTrader: (4)

Hi, I've got a 382 with around 11:1 CR, AFR heads, and a 230 cam. I'm running TTS headers with the stock cats, and Z06 mufflers. I'm also on crappy CA 91 octane gas. I'm wondering what kind of total timing you guys are able to get away with in similar combos on 91 octane.


Thanks,
Terry

Terry Burger

iTrader: (4)

Do I hear 26 degrees? Going once....

horist

w/that much compression and only 91 octane... 26 would prolly be the high end... though alot depends on weather... I run 11.3:1 compression and 93 octane with 28* of timing... and I'll ping when it gets into the high 90s

24 would probably be a safe timing, with 26 max

Ryne @ CMS

iTrader: (10)

why dont you call your buddy mike morgan and ask him, to you he was a tuning guru, but if you a answer i would say 26-27 degrees no more, i am running 25 in my 408 with 11.5:1 compression and i dont ping on 91, but i also have alot of overlap

Bombguy99z28

I'd try 23-24 around peak torque and 25-26 on the top and bottom and see how it worked.

white2001s10

iTrader: (4)

I don't know. AFR's are supposed to have great swirl, and if you're also running a tight squish, then I'd think not too much advance there.
I do know one thing for sure.
The internet would be the last place I'd go to find out what the motor wanted.

Terry Burger

iTrader: (4)

I wish Morgan was around, he's fix this for me quickly.

The map I have in there is all fubared (previous owner set it up). It has around 28 degrees up top, but pings like crazy. I think I'll track down a stock Z06 map and then back the total timing down to 25 degrees after peak torque and see how it does.

NAVY

hi if i have 98 octane gas its same pragmatism 24-27 degrees max


thank
navy