man, I just realized it hs 1 5/8 mid length headers (and probably 2.5" collectors). I would get some 1 3/4 LT's (or 1 7/8 would be even better) on there ASAP.

The heads ended up at 55 cc instead of the standard 57 cc but a -5 cc piston would put it closer to 12.0 to 1 and a -12 cc piston would be about 11.2 to 1. A -16 cc piston would be closer to 10.7-10.8 if I am guessing correct (quick guesstimates in my head).

I must have misunderstood the exact piston used if I had told you that compression ratio. The heads were milled a lil more so I know we were wanting more compression but there must have been confusion on what piston you had or what compression you would end up with. Either way, that is as small as you can get the chanmbers and the next step would be angle milling and corrective intake milling to amke it all line up. You might be able to get them slightly smaller but the valves hang of the deck already and they will not end up much smaller with thoise 2.055 valves.

Good #'s considering an A4, stall, those headers and a base mail oder tune. I think they are VERY good #'s considering all of this. I would change headers and then go to the track.

 

I can't see it either, and I thought it was the monitors at work, too. I figured it was bad on my end because turbo Z mentioned seeing the 12.8 a/f.

Also, high 10's for SCR isn't bad. It is still higher than stock and is easier to tune.

 

can be done...I have a 48mm CC, and zero'd deck....not sure on the exact dish....but it is somewhere around there...thin gasket, and 12.2:1

 

I darkened my monitor so I could see the graph. How the hell did you spin the car to almost 7600 rpm with a stock PCM? Also, it stopped making power long before that (~6500), so there is no reason to spin it that high (more wear and tear).

 

No, I think the dyno's rpm is wrong. It only spins up to about 6700 or so according to my Data Master scan program. If any one would like to see the files on that, I can email them to you after Thanks Giving.

 

So how is the power and torque right if the dyno RPM is wrong?

 

Very good question. The torque should be the same, but the horsepower is going to be off.

 

Pretty good for no tune, auto, and the midlengths

 

The air/fuel is very close. I am thinking I can get more timing into the car now that we are calculating the compression to be lower. With a few more degrees of timing and a bit leaner it can pick up 5-10HP or a bit more. The headers and the fact it is an A4 is robbing it of a BIG number, but this car will be a monster at the track (which is where it really counts), I've tried drag racing my dyno sheet with somone elses and it didn't work

 

I still think that is some nice power. I drive a 400 RWHP car and I know how nice it feels.

 

Great! I'm starting to feel better about the car. I know when I drive it, it feels pretty strong. I probly won't get to the track til January since ther is only two more Friday night that Houston Raceway is open this year.