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Re: 1987 Corvette Z52

Posted: Thu Aug 03, 2023 2:25 pm
by Basement Paul
On Wed AM we decided to lower the back of the car by using the longer bolt method of dropping the car. This is good and bad as it turns out. The good part is it lowered the car somewhere between 1-2" depending on the measurement and side. And that looked pretty cool. The bad part is that the rear wheels were towed in now, even when there was no weight on the car, and even worse with a driver and with the car in gear. The reason that is bad is that the rear tires are no longer flat on the ground, so when you want to launch at the dragstrip, you're not using all of the tire anymore. I went from dead hooking on every pass with over 32psi in the tires to spinning every time with only 24psi... Not an ideal situation, so on Saturday I plan to just go back to the stock bolts and let the rearend sit up high and proud in stock mode. It's an easy swap, so lesson learned. I'm not convinced one way or the other yet if the lowered setup will be better in an autocross / road course scenario, but it's easy to go back and forth if necessary.

-BP

Re: 1987 Corvette Z52

Posted: Thu Aug 03, 2023 2:30 pm
by TireSmoker
I'm pretty sure the rear toe-in is adjustable -- there's a spec for it, at least. You might be able to fix it without losing your lowered stance.

-Dave

Re: 1987 Corvette Z52

Posted: Thu Aug 03, 2023 3:36 pm
by Basement Paul
Good thinking, and I'll look into that, but might wait for a later date when I start fine tuning. For now we still have bigger stuff to fix and I don't have to think or learn to fix it.

-BP

Re: 1987 Corvette Z52

Posted: Thu Aug 03, 2023 8:38 pm
by Basement Paul
I said toe, but really meant camber...

-BP

Re: 1987 Corvette Z52

Posted: Fri Aug 04, 2023 7:38 am
by Basement Paul
One of the four 3rd brake light bulbs was out. An 891 halogen push in deal from the 80s. Apparently no stores in Painesville carry them, but every store that's 10miles away does... So I'll just have to drive a little farther this morning to fetch one. Don't worry though, it's sunny and I have a convertible, it will be OK.
When I took the third light assembly apart, I could see how poorly the paint doesn't match the original color. I like the new color better, but now I have absolutely no way to touch it up as problems arise.

-BP

Re: 1987 Corvette Z52

Posted: Sat Aug 05, 2023 3:34 pm
by Basement Paul
Today we put the rear suspension back to stock. We tried to tint the glass targa roof ourselves, but failed. Then when I went to leave from Dad's to go home the battery light was magically now on and the volt meter said it wasn't charging anymore. I had already driven the car more than 30 miles this morning... This is a bummer since I was planning to race it tomorrow. No local auto parts stores carry that alternator, so we'll have to get one on order.
That was pretty much a bummer...

-BP


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Re: 1987 Corvette Z52

Posted: Sun Aug 13, 2023 2:42 pm
by Basement Paul
The new alternator is installed and functioning properly at 13.9 V at warm idle. This week we will get to MostMint's place and try to test fit his Jaguar wheels from Kurt's car (I think). If they clear with no modifications, I'm going to buy tires for dirt drag racing and give that a shot with this car. Seems like it would be fun and would have a strong showing in a 2wd class. But mostly just for fun. In the meantime we'll be back at the drags on Wednesday.

-BP

Re: 1987 Corvette Z52

Posted: Mon Aug 14, 2023 11:41 am
by Fred32v
Had the C4 out for a run today returning the core of the old alternator for $11 to Newbury Auto Parts.
Then took it to the Marathon at the bottom of the hill for 7 gallons of 93 octane,
hoping to drive it to see the Mint one on Wednesday.

Re: 1987 Corvette Z52

Posted: Fri Aug 18, 2023 11:59 am
by Fred32v
Another visit to Newbury Auto Parts
Returning our new alternator.
We now have another new alternator,
this time they tested it before they gave it to me.

Now on the bench awaiting installation.
I got a guy.

Re: 1987 Corvette Z52

Posted: Mon Aug 28, 2023 7:45 am
by Basement Paul
The rear y-pipe has been bugging me for awhile since whoever replaced the large rear cat converter put this pipe that chokes it down from 3" to 2-1/4" before the Y. I bought a cheap 3" to 2.5" Y-pipe to replace (https://www.summitracing.com/parts/JEX-U6-4) the crappy choked down one. I got to work Saturday night and was able to sawzall the cuts close enough to where I needed for welding in the rear, and clamp in the front. I wanted it to look stock like it did before and not leak and I was able to accomplish that mission. I can't really feel a lot from the seat of the pants but I guarantee it will be stronger as it's a way bigger and smoother setup.
We did some stuff buying another set of rims and tires for the dirt drags. I'll let 32V post pictures of the wheels.

-BP

Re: 1987 Corvette Z52

Posted: Mon Aug 28, 2023 9:42 pm
by Fred32v
The wheels picture that BP promised, two Jag, two Vette, now all are black.
Black wheels
Black wheels
Ready for whatever is to come.

Re: 1987 Corvette Z52

Posted: Sat Sep 02, 2023 4:58 pm
by TireSmoker
I made a trip to the Tiresmoke Munson outpost to pick up a little hardware for the Porsche project and to see the DirtVette in person!

Re: 1987 Corvette Z52

Posted: Sun Sep 03, 2023 8:20 am
by Basement Paul
You know the tires are badass when you mean-mug the camera and point at them. Obviously we test fit them but decided not to drive on them until we get new lug nuts with an extended thread to go inside the bigger lug holes that the rims have.

-BP

Re: 1987 Corvette Z52

Posted: Sun Sep 03, 2023 5:29 pm
by wxo
Where are you thinking of using those badass tires?

Re: 1987 Corvette Z52

Posted: Sun Sep 03, 2023 6:22 pm
by Basement Paul
Dirt drags at Dragway 42 ( and other places eventually):

https://www.koidragracing.com/

-BP