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Re: 1987 Corvette Z52

Posted: Sat Jun 13, 2026 8:39 pm
by Basement Paul
I got the driveshaft to and from Henderson this week. After some concern that they made it 1/4" longer than I wanted, we installed it today with no issues. The car runs smooth up to post 1/4 mile speeds, and is inserted into the trans a much more acceptable distance. I'm calling it good!

- BP

Re: 1987 Corvette Z52

Posted: Fri Jul 17, 2026 8:37 pm
by Basement Paul
At the same time John's Vette was at Hutter's, so was my Vette. I was scheduled to get a final tune on the Holley computer from Trevor. He did, as usual, an amazing job making the drivability of this thing amazing. It was pretty good as it was, but he fixed the transmission shift logic, fixed the speedo, adjusted the converter lockup, reset the cooling fans to a lower temp. He also went after the fuel table and said that it was dumping way too much fuel in at the hit. He said he adjusted the spark delivery considerably too. So although the peak HP probably only went up maybe 6-7 over the base tune, the curve is now WAY better from way down low. And you can feel it everywhere from behind the wheel.
It will be interesting to see where it shows up in the ET at the track. I suspect mostly in the first few hundred feet, but that should translate everywhere.
The numbers were 285hp and 285lbft at the wheels. I guessed it would have been 295hp, but the air was absolutely terrible the day he tuned it, so those are probably as low as I would ever see. He also didn't charge me for a full tune since he said it wasn't too far off to start so it didn't require as much time as a normal from scratch tune. I thanked him for that. :D
I'm torn now for Wed night: Viper or Vette?

-BP

Re: 1987 Corvette Z52

Posted: Sat Jul 18, 2026 1:24 am
by TireSmoker
I'm looking forward to taking a ride in this thing.

Wait for good air to take the Viper.

Re: 1987 Corvette Z52

Posted: Sat Jul 18, 2026 7:42 pm
by Basement Paul
I'm leaning towards that logic.

Probably going to run the Vette this Wed.

-BP

Re: 1987 Corvette Z52

Posted: Mon Aug 03, 2026 7:45 am
by Basement Paul
Since the last post the Vette did make it's way back to KMP for a post tune race. The tune unfortunately netted me nothing in the 1/4 mile at all. The car remained super consistent in the low 12.2s all night, but I lost in the semis on a reaction time. I'm not disappointed though as it's just so much better to drive everywhere else.
This past Friday night the Vette made it's LS debut at the Lake County Fair dirt drags presented by KOI Dirt Drags. My previous best ET in the dirt with the Vette was a 4.74. I was able to lower that to a 4.40 on a much worse track. As I suspected, this car would be just about as fast as the S10 in the dirt due to better traction / weight distribution. The S10 on this same track last year was basically the same or even a little worse consistently. I was able to win the 2WD class and got runner up to The Mad Scientists dad in gas 4.5. On a good track this should be in the 4.2's, but finding a good track has been tough since Dragway 42 doesn't do dirt drags anymore. Super fun to get it back in the dirt.

-BP