VINCE

iTrader: (1)

Mark your timing and knock is definitely a problem.. It drops pretty quick.. Have you had any kind of professional programming done yet?

1madss

iTrader: (10)

I'm still gathering information to get it tuned. I will probably send off my PCM to MTI one day this week and then dyno again.

Mark

VINCE

iTrader: (1)

Sounds like a good idea Mark.. That should complete your package..

427Zo6

The wideband O2 readings are the most accurate. Be certain that the readings are taken in front of the cats. You are near a lean condition.

Bill00Formula

iTrader: (4)

So your trap speed is over 122 mph now. Wow, that's impressive.

1madss

iTrader: (10)

I finally got around to dynoing my car in preparation for tuning after installing the MTI S2/Hammer cam combo last month. I picked up 7mph in the 1/4 so far. I dynoed 408.8hp/388tq through a "Zed" style cutout and pantyhose mod (my track config <img src="images/icons/smile.gif" border="0"> ). My question is the Dyno Wideband shows me at 13.2-13.4 up to 5900 when it drops off to 12.4 by 6100 up to the limiter on both pulls. My A-tap O2s are showing anywhere between .725 and .945 <img src="images/icons/frown.gif" border="0"> . What is more accurate?

Here are my a-tap numbers; Sorry about the crappy formatting.

Run#1
CoolantTemp/EngineSpeed/ThrottlePos/IgnitionTimingAdv/KnockRetard/LTrimB1/LTrimB2/O2B1S1
183 2154 100 23 0 5.5 3.1 0.94
183 2284 100 27.5 0 1.6 0 0.915
183 2493 100 30.5 0 1.6 0 0.925
183 2726 100 30 0 1.6 0 0.915
183 2946 100 30 0 1.6 0 0.92
185 3185 100 30 0 1.6 0 0.91
185 3430 100 30 0 1.6 0 0.905
185 3677 100 29 0 1.6 0 0.905
185 3935 100 28 0 1.6 0 0.915
185 4202 100 28 0 1.6 0 0.925
185 4463 100 26.5 0 1.6 0 0.925
185 4711 100 25 0 1.6 0 0.925
185 4984 100 25 0 1.6 0 0.925
185 5232 100 25.5 0 1.6 0 0.925
187 5514 100 26 0 1.6 0 0.925
187 5762 100 26 0 1.6 0 0.935
187 6016 100 26 0 1.6 0 0.935
187 6233 100 26.5 0 1.6 0 0.935
187 6432 100 27 0 1.6 0 0.945
187 6593 100 27 0 1.6 0 0.055

Run#2
CoolantTemp/EngineSpeed/ThrottlePos/IgnitionTimingAdv/KnockRetard/LTrimB1/LTrimB2/O2B1S1
189 2218 100 30.5 0 3.1 0 0.725
189 2395 100 30.5 0 3.1 0 0.725
189 2607 100 30.5 0 3.1 0 0.725
189 2813 100 30 0 3.1 0 0.735
190 3059 100 30 0 3.1 0 0.735
190 3308 100 30 0 3.1 0 0.75
190 3565 100 30 0 3.1 0 0.755
190 3797 100 28.5 0 3.1 0 0.77
190 4074 100 24.5 3.4 3.1 0 0.775
190 4313 100 24.5 3.2 3.1 0 0.79
190 4579 100 22.5 3 3.1 0 0.8
190 4828 100 22 2.8 3.1 0 0.805
190 5075 100 23 2.6 3.1 0 0.805
190 5328 100 23.5 2.5 3.1 0 0.81
192 5588 100 24 2.3 3.1 0 0.82
192 5817 100 24 2.1 3.1 0 0.835
192 6057 100 24 1.9 3.1 0 0.845
192 6273 100 25 1.8 3.1 0 0.855
192 6482 100 25 1.6 3.1 0 0.85

My timing looks pretty good up to 4K when it drops off, other than the KR in the second pass. I'm pretty sure that it is false knock, at least that's what I'm hoping <img src="images/icons/grin.gif" border="0">

It's also surprising that both pulls were within .1 hp of each other even with the differences between the two a-tap logs.

Any ideas on what kind of HP improvements I would see by fixing the A/F at 6K and gettting my timing up to 30 degrees all the way up to 6800?

It seems that I'm missing ~15 rwhp/tq.

These pulls are made with a Moser 12bolt w/4.11s and my stock SS rims and tires. Meaning no dyno tricks, obvious by the number <img src="images/icons/grin.gif" border="0">

I'll try to get the dyno sheet scanned and posted soon. My scanner is on the fritz right now.
TIA
Mark

[ November 26, 2001: Message edited by: 1madss ]

[ November 26, 2001: Message edited by: 1madss ]</p>

Godspeed

Be careful, you're starting to run dangerously lean.

-Jeremy

1madss

iTrader: (10)

I wish <img src="images/icons/grin.gif" border="0"> No, my mph right now is only about 119. I was back down to 112 through the summer. I have yet to be able to get to the track on a cooler day.

Mark