Blown02Camaro

iTrader: (4)

First off im new to the high horsepower world,I recently just got my turbo 383 finished up and tuned a a local shop. Made great power on 93 octane. my question is this, Is an AFR reading of around 12.8 in boost safe? Cause doesn't the lower the number mean the safer AFR. Sorry if this may seem like a pointless question, I would just like to know. Thanks

outkast6991

iTrader: (34)

I'm no expert but 12.8 with boost doesn't sound good to me. I'm n/a and 12.8 on 93 is still giving me some kr. I'd talk to a reputable tuner and stay out of wot until its fixed

Ed Wright

iTrader: (1)

It will make great power for a little while. Like the other gentleman said, stay out of boost until it is fixed. 11.5-1 is pretty safe and normally makes close to the same power. It won't live long at 12.8-1. Those are NA numbers.

wait4me

iTrader: (10)

Yeah, DEFINATELY STAY OUT OF BOOST until you get the a/f back down to a good 11s value. It wont last long if you don't. 12.8s is for non supercharged

Blown02Camaro

iTrader: (4)

Great Thanks for the info. This is odd cause the shop I go to this is all they do

Blown02Camaro

iTrader: (4)

so would an 11.8-12.0 be good for a pump gas street tune

outkast6991

iTrader: (34)

If your shop is purposely targeting 12.8 on a boosted car I'd go elsewhere

Blown02Camaro

iTrader: (4)

They just tuned it on the dyno and didn't do any street pulls so this may be why its high

murphinator

iTrader: (2)

12.8 is on the lean end of where you typically see NA (12.5-13.0) , mid 11's to be safe on boost , with a real reputable tuner that knows turboed ls tuning well doing the tuning you may creep up to high 11's

Blown02Camaro

iTrader: (4)

Good news The Afr is at 11.6-11.7

Ed Wright

iTrader: (1)

That's where I always put them. Plenty safe. A little leaner will make a little more power with a turbo(s), but not as much as many want to think.