I seem to be close......

[NHRA Super Gas]

Well like you said razor, my "out of the box" tune up seems to be really close, 770ish with 0.0 KR. Question for you......If I just wanted to bump that to 780-800, I could use fuel pressure, adjust eric's chip, or turn the blue knob on the alky controller...is there a "right" answer?

Right now i'm on about 4-4.5 on the alky controller, defualt 85%DC and 23/21 on Eric's chip, and the same FP he calls for. My thought is it could use a little more alky to be safe in case I start turning the wg rod in search of some more ET.

 

[Razor]

Use alky for knock suppression, use fueling for O2 changes.. so in your question, put the chip into program mode and bump your fueling up a few numbers.. take it from there watching performance.

Now if you ran 790 and had knock.. then I would suggest adding alky via gain knob and pulling some fuel out to get back to 790. Make sense?

And the higher the boost.. the more alky volume your moving into the motor.. so typically if the car needs to be leaned out a little.. move the boost up.. the alky will follow.

HTH

 

[NHRA Super Gas]

Update

OK, since the post above I have now run all the 100 octane fuel out of the car and changed back to 93. I've noticed with no other changes the mv numbers on the scanmaster lowered to around 740-760 down from 770 or so with 100. Also, with the alky control knob at around 4 -4.5 I was still picking up some occasional knock, bumped it to 5-5.5 and still a little. Moved it to 6 and haven't seen any since.

Curious if 6 is ever considered too much, car is maybe a hint lazy since then. (no add'l timing added) Razor, I know we discussed the effect of fuel on EGT and 02mv, but I forgot what we decided. Is 760 on pump gas an acceptable number?

Thanks,

Eric

 

[Razor]

Eric ,
Bump the fuel up on the chip. Put it into program mode and do so.

760 may be lean.. you need to bump the WOT fuel and look to see if the trap MPH increases or decreases. Typically a lower timing chip will net lower O2's.. as the heat increases so will the EGT increase and the O2 drop.

First step.. eliminate knock.. next step is tune afr to what makes the most power. Sounds like your car is leaning out and your padding the fueling with alky to eliminate knock. The 740-760 number would indicate that.. and then having to bump the alky to stop the motor from detonating.

So up your injector duty cycle at WOT and drop your alky amount.. bet it picks up. Target O2's in the 780-800 range on a street tuneup.. whereby your in the throttle for a short period of time. At the track.. then move your target up or down and see what makes it respond better.

Tuning with a 30 dollar narrow band O2 takes patience.. it would be faster with a wideband O2.. then i'd be telling you to target 11.0-11.2 and work from there.

HTH