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Went to drag strip last night - finally 9 sec time slip!

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Went to drag strip last night - finally 9 sec time slip!

 
Old 05-10-2019, 07:32 PM
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632C2
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Here are a couple of pics I dug up.

Getting ready to put the car back on the DynoJet:



In case anyone is wondering what a clutch turbo looks like:

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Old 05-10-2019, 09:16 PM
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Nice car! I used to race a Vega with a mild 402 big block , typically would have the same 60 foot (1.6902) with an 11.68. I had a Th-400 with a transbrake, reverse valve body and 2500 converter,
12 bolt rear w/spool and 4.88's, 11.5 slicks.
I would look into traction, weight transfer for same.....clutch slipping perhaps? Different traction compound slicks? You def should be screaming out of the hole, with that E.T.
I used to shift mine at 5800-6200 depending on your cam, your rpm's should be up at least to 5000-5500 at launch with a clutch...

Last edited by Picasso451; 05-10-2019 at 09:21 PM. Reason: added text
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Old 05-10-2019, 10:21 PM
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Originally Posted by Picasso451 View Post
Nice car! I used to race a Vega with a mild 402 big block , typically would have the same 60 foot (1.6902) with an 11.68. I had a Th-400 with a transbrake, reverse valve body and 2500 converter,
12 bolt rear w/spool and 4.88's, 11.5 slicks.
I would look into traction, weight transfer for same.....clutch slipping perhaps? Different traction compound slicks? You def should be screaming out of the hole, with that E.T.
I used to shift mine at 5800-6200 depending on your cam, your rpm's should be up at least to 5000-5500 at launch with a clutch...
Thank you for your excellent insight and advice. I am thinking about the possibility of using slicks. My best 60' time I had on Wednesday night was leaving at between 4000 and 4500 rpm and slipping the clutch. I tried leaving once at 5500 rpm and spun so bad that the car veered to the left and came close to hitting the barrier. Scary stuff! I completely got out of it and then went back to the center of the lane and nailed it again. It still went over 141 mph on that run.
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Old 05-10-2019, 10:45 PM
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Very impressive and congrats! Awesome looking car!

When I was (much) younger I had a big block 1971 Nova with a Fairbanks clutchturbo. It was awesome! It used to shift so hard that when I was in slicks it would buckle them every shift! Some guys would think I had a bad driveshaft ujoint. Haha
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Old 05-10-2019, 10:56 PM
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Originally Posted by Under-Pressure View Post
Very impressive and congrats! Awesome looking car!

When I was (much) younger I had a big block 1971 Nova with a Fairbanks clutchturbo. It was awesome! It used to shift so hard that when I was in slicks it would buckle them every shift! Some guys would think I had a bad driveshaft ujoint. Haha
This is great to hear! What kind of times were you running, what size motor, and how hard (RPMs) did you leave? Thanks!
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Old 05-10-2019, 11:44 PM
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Originally Posted by 632C2 View Post
This is great to hear! What kind of times were you running, what size motor, and how hard (RPMs) did you leave? Thanks!
It was a 396 .060 over, 11:1, rectangular port heads, solid roller .670 lift (I forget the duration),12 bolt with 4.56s, Holley 830 annual discharge carb. I had a lot of fun with it. Unfortunately where I used to live the closest track was over 2 hours away so i didn't get a real chance to see how fast it was. If I had to guess I'd say low 11's which was pretty good almost 30 years ago! I have pics of it somewhere....
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Old 05-10-2019, 11:44 PM
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Originally Posted by 632C2 View Post
Thank you for your excellent insight and advice. I am thinking about the possibility of using slicks. My best 60' time I had on Wednesday night was leaving at between 4000 and 4500 rpm and slipping the clutch. I tried leaving once at 5500 rpm and spun so bad that the car veered to the left and came close to hitting the barrier. Scary stuff! I completely got out of it and then went back to the center of the lane and nailed it again. It still went over 141 mph on that run.
You're welcome. To help get better weight transfer for traction, do you have drag shocks up front? I used 3 way adjustable ones, for different conditions...50/50, 70/30, and 90/10 . The front will jump up easily on 90/10 sending it all to the back.
I never used radials, so can't suggest a better tire.
The idea behind taking off at near your redline is to keep the rpm's up as consistent as possible the whole run, but don't if you have traction problems as you have seen. Rear gears make a big difference, but again, you need traction to make it work.
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Old 05-11-2019, 09:36 AM
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Found it!

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Old 05-11-2019, 01:09 PM
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Originally Posted by Picasso451 View Post
You're welcome. To help get better weight transfer for traction, do you have drag shocks up front? I used 3 way adjustable ones, for different conditions...50/50, 70/30, and 90/10 . The front will jump up easily on 90/10 sending it all to the back.
I never used radials, so can't suggest a better tire.
The idea behind taking off at near your redline is to keep the rpm's up as consistent as possible the whole run, but don't if you have traction problems as you have seen. Rear gears make a big difference, but again, you need traction to make it work.
I have Viking double adjustable on the front and on the rear. I just need to get the traction thing figured out. Thanks for the info!
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Old 05-11-2019, 01:10 PM
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Here is my last dyno sheet:
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Old 05-11-2019, 01:41 PM
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Damn...141 is moving! Tell us about your mill, your car is very unassuming, love it!
Ever see the street?
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Old 05-11-2019, 01:45 PM
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Just a little more traction and you’ll be needing a chute! Very impressive run
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Old 05-11-2019, 02:35 PM
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Originally Posted by cuisinartvette View Post
Damn...141 is moving! Tell us about your mill, your car is very unassuming, love it!
Ever see the street?
Thanks! Don't sell me short though. 141 mph was my bad run.😂 My best run was 143.95 mph so let's call it 144! But seriously, I drive the car as often as I can on the street and it is a blast!
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Old 05-11-2019, 02:37 PM
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Originally Posted by CA-Legal-Vette View Post
Just a little more traction and you’ll be needing a chute! Very impressive run
150 mph seems a long way from where I am at right now. Never really gave it much thought but you may have just changed that. Thanks!
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Old 05-12-2019, 11:51 AM
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If you were in state I'd be handing you a set a slicks for that thing (from a low 11's Chevelle, bolt right up) and I'm thinking on a good air day you'd be near the 150 mark looking at the dyno sheet anyway. I may put them on my 68 this year and see what happens (I'll wait til season is about done though in case something in the drivetrain lets go)
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Old 05-12-2019, 12:08 PM
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Originally Posted by 632C2 View Post
Here are a couple of pics I dug up.

Getting ready to put the car back on the DynoJet:



In case anyone is wondering what a clutch turbo looks like:

Where did you get the transmission holder/clamp (I'm working on building one right now and I'd look at buying instead to save time).
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Old 05-12-2019, 01:21 PM
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Originally Posted by suprspooky View Post
Where did you get the transmission holder/clamp (I'm working on building one right now and I'd look at buying instead to save time).
I'm amazed you were able to pick it out through all of the clutter on my bench. I bought it off of eBay. It's under "GM Transmission Holding Fixture".
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Old 05-12-2019, 03:08 PM
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Killer performance as always Steve...

"You know, if that thing had a xxxxxxxxx it would run...…"

You know I had to...

Keep up the good work...
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Old 05-12-2019, 04:39 PM
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Originally Posted by ajrothm View Post
Killer performance as always Steve...

"You know, if that thing had a xxxxxxxxx it would run...…"

You know I had to...

Keep up the good work...
Hey thanks Alan. That's a good one! You're killing me!
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Old 05-13-2019, 08:54 PM
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Congrats on breaking into the single digits in that beautiful car.

As you may know, no good deed goes unpunished... upgraded fire suit, pants and jacket, 8.5 second roll cage, neck brace, window net, gloves, roll cage certification and license.

Are you going to try to go faster?
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