Took my Grabber to the Track

I took my '72 Grabber to the track Saturday trying to lower my best ET. My previous best time was a 13.37 @ 105.9 MPH. I changed my rear gears from 3.40 to 4.11. I ended up running a 13.15 @ 107.99 MPH.

My car has a .040 over 302 with a roller block conversion. It has a Lunati 51028 cam, Edlebrock Performer 1.90 aluminum heads, Edelbrock Performer RPM Air Gap intake and a 750 vacuum secondary Holley carb, long tube headers, Dr. Gas X-pipe, Flowmaster mufflers with 3" tubing including over the axle tail pipes.

The car has C4 with a shift kit, stock stall, 8" rear with 4.11 gears and a mini spool. I ran it on 26 x 10.5 x 15 Mickey Thompson ET Street bias ply tires.

It was a little warm for the last weekend in November with temps in the low 70's. DA was in the 700-1,300 foot range during the day.

I was hoping to squeeze a 12.90 something out of it, but the warmer weather didn't cooperate. I hope to get a stall converter over the winter months and that should put me solidly in the mid to high 12's.

The car was pretty consistent. My 4 passes were 13.15, 13.18, 13.19 and 13.21. MPH's were all 107 something.

Here is a picture of my car, my best time slip and 3 videos of my passes.

 

Thanks for sharing all the technical details, it doesn't happen too often!

 

A 13.2 is pretty damm respectable.

 

You're welcome! I enjoy when others post their combinations. I know when I talked to you at the MCCI Roundup Nationals this past summer that your car ran real low 13's and I was hoping to get there or into the high 12's.

Thanks!

 

That MPH is impressive but your 60ft is killing the ET... With a 3K or so converter and a 1.8 short time your car will easily run 12.70s..

 

I agree!

 

Do you think the 750 is hurting you at all? With a healthy 400 in my GTO, I picked up ET and 60 foot by switching from a 750 vacuum secondary to a 600 double pumper.

 

He has improved since then.....a lot

 

I used to have a 600 vacuum secondary on the car, the 750 felt stronger throughout the powerband, though I wasn't able to test that at the track.

Yes, he has.

 

great info thanks for sharing

 

Wow,those are good times with your combo,seems like you are getting off the line pretty well.A 3000 stall will be a huge help,if you get er to hook & get those 60 fts down in the 1.6 range you will be flying,good luck.

 

Thanks Dan!

The car runs really well on the street from a roll. If you hit it at 3,000 RPM's in 1st gear and run it up through the gears it pulls hard. At the track I just have to wait for it to get to that sweet spot. A stall should definitely help the car!

 

What kind of traction bars do have,getting them set properly will also help a lot.I hope that Richmond Dragway has the Hangover Nats race on New Years day again this year.If the weather cooperates it would be on a Friday,the turn out last year was really good & I am really looking forward to it.

 

I don't have any type of traction bars on the car. It doesn't spin at all off the line.

Richmond Dragway is having the Hangover Nats again this year. I think they might also do a couple of more Saturday test and tunes the next couple of weeks. They just repaved the track. Concrete to the 330' mark and new asphalt the rest of the way.

 

It's amazing how every car reacts different to changes. I had such good luck with double pumpers on that car that you would be hard pressed to get me to run a vac secondary carb again. Once I swapped in the 455 I ran a 3310 750 vac secondary and it ran a best of 12.35, put a box stock 750 DP on it and it went 11.88. Of course as I'm typing it dawns on me the 3310 is the same carb from both combos so it could easily have been the carb and how it was tuned. I gave it to a friend that wanted it since it was originally off a Chevy big block, knew I'd never use it again.