AVCR and SAFC install

[Vovan]

today i've installed SACFII and AVCR. i'm going to run 1.0 bar pressure on stock turbo, but there is some kind of a sound like iron knock... is it a detonation? i've also a backfire always above 0.5 pressure... hope the spark plug gap to 0.7 will fix it.

what i would like to know is will the lower gap (0.7) fix my problem of backfier or not?

btw, i'm trying to measure the A/F ratio with Apexi turbo timer thanks.

[Guest Robo's]

Check your A/F ratios, this could be your backfire. Too much unburnt fuel.

[Raza]

iron knock...get it tuned . thatsounds like Detonation.

u could stuff ur motor if u run it like that.

[Vovan]

Originally posted by Robo's

Check your A/F ratios, this could be your backfire.  Too much unburnt fuel.

can the detonation happen on rich mixture? because it backfires on 1.0 bar too but it looks like it detonate... it also backfires on 0.5 bar. i thought that detonation happen only when the fuel mix is too lean, but how then the backfire happens?

[Raza]

if u got the stock intercooler 1 bar seems alot..thats y u need to get it tuned by a pro

[Vovan]

No pros here all is done by myself.. learning from the start

[Guest Robo's]

Lean it off, mine backfired everytime at higher boost. Now im running 12psi

[Guest INASNT]

Originally posted by Vovan

No pros here all is done by myself.. learning from the start

LOL

How exactly are you measuring the a/f ratios??

[franks]

i thought audible detonation sounded like a tin can shaking around with nutz and bolts in it. could that sound be just vibration noise from the exhaust or turbo heat shield?

does your check engine light come on when you hear this noise? i've registered 150+ on my powerFC for knock and i've still not heard detonation. i believe you're alot more susceptible to detonation when you start advancing ignition timing.

i just can't imagine how an increase in boost and some fuel adjustments could be making the car detonate (unless you've taken out alot of fuel and your running a shitload of boost).

i wouldn't trust a/f ratios from a turbo timer. you are best to get it tuned on a dyno with the sniffer up the exhaust.

[Vovan]

Originally posted by INASNT

LOL

How exactly are you measuring the a/f ratios??

My Apexi turbo timer shows it... but it actually sucks, i tried to make a very rich mixture, there is a black smoke from the exhaust, but Apexi still shows 14:1 no Dynos here....

Franks, check engine didn't flash - should it? but yes, i think it "sounded like a tin can shaking around with nutz and bolts in it". just didn't know how to describe it... i will try to configure the knock sensor on the SAFC and see if it is a denotatation or not.

[Guest INASNT]

Originally posted by Vovan

My Apexi turbo timer shows it... but it actually sucks, i tried to make a very rich mixture, there is a black smoke from the exhaust, but Apexi still shows 14:1 no Dynos here....

Franks, check engine didn't flash - should it? but yes, i think it "sounded like a tin can shaking around with nutz and bolts in it". just didn't know how to describe it... i will try to configure the knock sensor on the SAFC and see if it is a denotatation or not.

your turbo timer has a sensor plugged into the oxygen sensor??

[Vovan]

it has a wire that connects to the stock O2 sensor

[Guest INASNT]

shite, didnt know it had that. U get a more accurate reading with a probe in the rear of the exhaust