Songzzz

Finally the engine is back in the car and ready for its first start up. 8V 3 litre (approx CR 8.7:1) with 72lbs injectors and mafterburner. While waiting for the Guru chips, I decide to start the car and try to break it in using STOCK chips. Will this do?

The car is eurospec, thus there's O2 feedback. Will running overly rich or lean foul up the break-in process? Stock Chips, without prior adjusting the Mafterburner, will I be rich or lean? FQS is currently at "0", perhaps there is something I can do to be safe?

Opinions and advise needed...

TIA

Sam Lin

It's going to be a crapshoot starting the car without proper programming, you'll need to immediately tune with the Mafterburner and your WB to get air fuel ratios correct. You'll likely run very rich. Frankly, I'd wait because you have no idea what's going to result.

Sam

Songzzz

Sam, Tks.

I guess the initial startup will be overly rich, do you think adjusting the FQS for less fuel will help?

Sam Lin

FQS isn't going to do a thing for you. The key will be Mafterburner tuning by someone experienced in a/f tuning.

Sam

mumzer

open up the stock vane meter and put 5 or 6 turns on the potentiometer spring....watch the wideband....
the additional tension will probably lean the car out badly at idle, so you will need to compensate by adding fuel on the idle mixture setting.

i know it sounds hokey, but two of the fastest 3 litres i have ever seen, one kokeln, one from KMR both ran tweaked stock meters....you can get enough air for about 360 rwhp through them.

worth a try

Songzzz

I do have some experience with ProM but I am probably going to load the fuel map (2.8L with 72lbs Inj and Welts chips) from lindsey's site as a start.. hopefully it wouldnt be too far off.

Mumzer, I am not using the stock vane meter.

Duke

With that start map you should be fine. Or at least not endanger the engine.
A/F ratios at idle aren't that crucial.

Keep us updated with the results with the new engine!

Bengt Sweden

Wait for the chips!!! Don't mess with the AFM since the chips are programmed for stock AFM.
Bengt

Songzzz

Yes! It's up and running now. I drove for 20miles and at only 5psi of boost, wooohoooo... TORQUE!!! I can say that the trottle response is as good as a WRX.

Can't wait to turn up the boost.

Duke

Sweet! What turbo do you run?

Songzzz

Kokeln (Stage V) Club..

nick_968

Good work there mate, nice to see its come together well. I am building the same setup as you but with a Vitesse turbo. Nice to see someone getting good results with what I am trying to do. Keep us updated with your progress as you wind up the boost etc.

Bengt Sweden

Me too! I mean I will build the same engine but with Vitesse turbo. My 2.5l already makes impressive power but I have wet dreams about the throttle response of a 3L. Is it as good as they say?
Bengt

Songzzz

Bengt, the throttle response is just incredible and it pulls hard even at 5psi of boost. Unfortunately, my factory rpm meter is not working but according to the Mafterburner I make full 5psi boost at 2500rpm.

Tom M'Guinn

Songzzz,

Congrats to you! Glad it worked out. I think you pulled it together in record time. I haven't even made it to the machine shop yet! Break it in, and get to a dyno!