This past Sunday, the Chicago Grand Prix Club held it'* annual dyno day. We had 21 cars run that day.

I wanted to run the Bonneville even though it wasn't tuned all the way. I just had my TOGs, GenV and N*/LQ4 MAF installed by local member (Ron Vogel) the night before actually the TOGs were installed the week before.) He got done with the car at midnight on Sat and only had 90 minutes to do a quick tune.

As for the dyno, I did three runs with the wideband O2. Car was in 2nd gear at normal operating temp for all three runs:

Run 1:270 whp/269wtq. My WOT AFR started at 12.4 with 1* of KR and steadily increased to 5-6* of KR by the end of the run. Since I was running alittle lean, they let me make a quick tuning change on the dyno. I removing a degree of timing and increasing my PE fueling by 5%.

Run 2:~269whp/~268wtq. My WOT AFR looked much better (~11.6....I had about 0-3* of knock throughout the run.)

Run 3:268whp/267wtq. About the same as run #2.

After I got the dyno chart, I noticed that the end of the run that my AFR dropped like a rock and I was running rich. I'm sure if I could of had a chance to lean it out that I would of got more out of the car.



OVerall I'm happy with the results. My previous dyno was 241whp.

I can't wait to get my W-Body Store IC installed. :P

Here'* a quick vid of the second run:
Dyno Run #2

Nice numbers. But I think you missed the RPM range where you hit peak torque.

nice numbers, but you appear to be a tad short on TQ for those HP #*... how was the KR? were you scanning?

looks like its about time for a 3.2inch pulley

Its pretty much impossible to dyno that range because the trans will downshift. And that is a big nono on the dyno.
And max torque #* will usually be off due to converterflash.

No way to make it hold second? I thought on 95+ you could put the shifter in second and it would hold it.

I pretty sure but hopefully someone else will chime in.

Nice !

nope. a 2000 wont hold 2nd

I know on my Bonne If I put it in 2nd it will stay there & bump into the 102mph limiter. Maybe it was changed in 2000.

Ed

it will hold all the way up to the rev or speed limiter, but if you are going under 30-35ish mph, it will downshift into first