2000psi

How much does the idle hunt? like jump around from 500-2000 or like 500-700? that I can deal with....Can I adjust the (injector) pulsewidth at idle to correct this or am I SOL? thanks!

Tom-Guy

Try 1000-1200 when you're supposed to idle at 850.

If you want a standalone type setup, get a P06, and OBD2 to OBD1 adapter harness, and the new Uberchips tuner app. Under $500 for everything - if you were already OBD1 the estimated price quote is $318, which includes your chip burner and all accessories except a laptop.

Chacko

Is this even with altering the throttle screw thing? At its minimum/maximum? Just impossible to get around?

scttydb411

everything that i have heard is that base timing witht he hack and btm works just fine on obd2. however, if it isn't wouldn't just backing base timing at the distributor back a little and then using a btm work just as well? this would also give you a safety margin to use btm to adjust timing/tune safety if you got bad gas, had extreme temp/weather change (heat/humidity), or drove from fla to the mountains? please don't flame if i'm totally off base, just trying to get the 411.

Tom-Guy

People make the AFC + BTM setup work, yeah. Your ignition is still much more advanced when compared to FMU + BTM or the usual standalone settings. If you do not run lean, you won't have any problems. If you retard timing you will affect low end power and start up.

At the cost of AFC and BTM, you could have a better setup on an OBD2 car. My $0.02. If you are comfortable with an AFC + BTM setup and uncomfortable with the possible complexity of something I'd propose, go for the AFC + BTM... they do work, just be careful and get your fuel dialed in. It's not a safe starting point to tune from, so beware *shrug*

2000psi

Thing is I already have the AFC from my last car....and 450cc would be cheap to get. I will get them from a yard then send them to RC to get cleaned /balanced before installing them. RC said it's about $20 per injector to clean and balance. The only thing I'm worried about is the ignition timing. I mean the ECU will advance it too much and i'm worried I won't hear the ping and then it'll all be over before I can lift off the throttle. Anyone have any idea what the timing will be at say 4000RPM with 450's set at -%35? I just want a ballpark figure to see how unsafe this setup really is. (stock ECU) D16Y7 thanks!!! one more thing, does the ECU base timing off of TPS voltage too? or just map voltage vs. RPM?

45psi

is uberchips vertigo?

Tom-Guy

The guy that got booted from this board for being a royal *****, yes.