[Penskecat]

I finally took my 95 DGGM Impala to the track to see what it would do.

I installed a 383 about a year ago. It pulled 425/450 on an engine dyno, so it's obviously not the most radical 383 out there. I had no idea what to expect from my times. I'm pretty satisfied with the results.

I'm sure you noticed the horrid reaction time. I hadn't been on a track in twenty years and was pretty shaky with the tree. A little practice and I should do better.

One disappointment was that I only made one run. My first was ruined when my throttle stuck wide open during my burnout. Man, that was a little disconcerting. Turns out, the tightening screw on the TB hose clamp interfered with the throttle mechanism. I remedied the problem.

My second attempt produced the time slip above and the pic below (thanks, Cheryl). The flat black '32 Ford was very cool.

While I was waiting in line for my third try, the Mazda RX7 in front of me actually burst into flames. It was then that I decided I'd just head home. It was getting late and the clean up looked like it would take a while.

All and all, a fun night. But maybe not for the guy with the Mazda.

 

[killerzracing71]

Damn rotary cars. They sure are loud though when they Turn Rs.

Sure faster then me, ill be happy to take that 383 off your hands lol

 

[Lance]

Not bad

You running drag radials or slicks? Need to get your 60' down into the 1.7 - 1.6's.

What heads and cam are you running? What are the rest of your supporting mods? Headers? TC? Gears? Tune?

The exact same thing happen to my throttle cable cwm4

The first run on my first 383 was a 13.8 However, once I sorted the tune out and got slicks on her I got a best of 12.28

Keep going to the track, practice and most importantly have fun.

 

[Penskecat]

Thanks for the input, Shane. Here are some answers to your questions:

Street tires - 255 50 17 Bridgestone Potenza RE750

Heads are aluminum GM with a valve job but not much in the way of fancy porting. Pretty basic.

Cam is a CC 502
Intake: 224˚@ .050” Exhaust: 230˚@ .050”
Lift: Intake: .536” Exhaust: .544”
Lobe Sep: 112˚

Headers are CIA 1.75" long tube

Torque converter is something I wimped out on. I figured I'd go conservative since the car is my everyday driver. The stall speed is only in the 2200+ range. If I were to go back and do it again I'd go with something in the 2800-3000 range. I had a local guy do the transmission and I was kind of paranoid about blowing it up. It's held up great during a year of enthusiastic street use. I'm not sure how it will fare with more track time. One way to find out, I guess.

3.73 Eaton out back

Herter mail order tune which seems fine. I suspect I could get a better tune on a dyno. I just haven't done it yet.


I'm wondering about reaction time. Does it relate directly to E.T.? In other words, if I cut .250 from my R.T. does that reduce my E.T. by .250? Maybe a silly question, but I don't know.

 

[yoko]

reaction time will not affect your e.t., you start the time when you pass the beam

its yor 60ft that will make the biggest difference

 

[Dan Fahey]

Thanks for the input, Shane. Here are some answers to your questions:

Street tires - 255 50 17 Bridgestone Potenza RE750

Heads are aluminum GM with a valve job but not much in the way of fancy porting. Pretty basic.

Cam is a CC 502
Intake: 224˚@ .050” Exhaust: 230˚@ .050”
Lift: Intake: .536” Exhaust: .544”
Lobe Sep: 112˚

Headers are CIA 1.75" long tube

Torque converter is something I wimped out on. I figured I'd go conservative since the car is my everyday driver. The stall speed is only in the 2200+ range. If I were to go back and do it again I'd go with something in the 2800-3000 range. I had a local guy do the transmission and I was kind of paranoid about blowing it up. It's held up great during a year of enthusiastic street use. I'm not sure how it will fare with more track time. One way to find out, I guess.

3.73 Eaton out back

Herter mail order tune which seems fine. I suspect I could get a better tune on a dyno. I just haven't done it yet.


I'm wondering about reaction time. Does it relate directly to E.T.? In other words, if I cut .250 from my R.T. does that reduce my E.T. by .250? Maybe a silly question, but I don't know.

Drag Race Tires -any brand

3200 Stall - (Edge, Yank, etc) will be perfect street drag converter.

If you have ODB1 any more Stall will require a PCM update.
The Trans will not shift under full power with more than 3200 rpm stall Converter.

Those two mods... your are in the 12's

Dan

 

[Penskecat]

Thanks, Dan.

I have a set of 9C1 cop wheels I used to use for winter. I believe they're 15"x8". Would they accomodate adequately sized slicks or drag radials?