FNG(foolish new guy) 66 Corvette Coupe

[doubl0h7]

New member Jim (James) Bond from Tennessee. Hoping to get a little input on some modifications on my 1966 Corvette coupe.

I'm going to start running this car in local SCCA in the new CAM class with the hope of getting a few of the bugs out and hitting one of the Goodguys autocross and the Powertour's Knoxville stop.

Some of the current details. Stock big block suspensions with old KYB gas adjust shocks and a ADDCO front sway bar. Mild 350 with hooker sidepipes and stock 4 spd. Stock 4 wheel disc brakes with o-ring pistons

Current track tire and wheel setup is 15X10 aluminum Sprint slots with Kumho Victoracers that won't comply with the 200 treadwear limit and bigger flares won't be added till the off season. I'd love to keep the 15" wheels but it looks like there just aren't any good options for tires made anymore.

I'd love some input on some lower cost mods I could do. I'm thinking some 17 or 18 inch wheels (possibly used C4 or C5 as I have a set of Vette brake adaptors) with a set of 200 treadwear tires (Direzzas? Hankook? BFG Rivals?) What's a good low weight wheel option?

Are the old style Koni's a good option or should I be looking for a more modern setup?

Anyone who has had experience setting up a C2 or C3 for racing please chime in!

[camcojb]

Cool name and a cool car. Welcome to the site.

[fleetus macmullitz]

Welcome Jim, you came to the right place.

https://lateral-g.net/forums/showthread.php4?t=40422

Here it is as well.

[BMR Sales]

Welcome Jim! I'm not a Fan of KYBs, so I'm sure that Konis would be better.

A Common Complaint is 15" Tires - The Selection is smaller but there are still some good tires available. I just bought some Toyo r888's in 15" ffor my Race Car - Sticky!

T.C.

[ProTouring442]

Welcome! What part of Tennessee? I'm on the outskirts of Knoxville, in Loudon County, near Farragut.

[GregWeld]

Welcome to Lat G!



Search the internet for the "Guldstrand mod"....

Get yourself a fiberglass mono rear leaf... or make sure your spring is the correct rate.

Dial in the CORRECT spring rate up front

Get some toe out not toe in - up front and get 3* of camber front and rear...

Get yourself a quicker ratio steering box

You didn't mention whether or not you're a road racer or an Auto crosser.... and that would determine your rear end gear ratio === so possibly a change there to make it more fitting to the track your running or driving you're doing etc.

Switch to a ligher weight flywheel and pressure plate/clutch set up for quicker rpms.

Car appears to be a '64 (disc brakes weren't standard until '65) -- so you might be running drums -- so change that out to the disc in the rear

Upgrade your Master Cylinder to a dual chamber 7/8" or 1" (depending on your preference for hard or softer pedal). The '64 had a single master cylinder.

[doubl0h7]

Originally Posted by GregWeld

Welcome to Lat G!



Search the internet for the "Guldstrand mod"....

Get yourself a fiberglass mono rear leaf... or make sure your spring is the correct rate.

Dial in the CORRECT spring rate up front

Get some toe out not toe in - up front and get 3* of camber front and rear...

Get yourself a quicker ratio steering box

You didn't mention whether or not you're a road racer or an Auto crosser.... and that would determine your rear end gear ratio === so possibly a change there to make it more fitting to the track your running or driving you're doing etc.

Switch to a ligher weight flywheel and pressure plate/clutch set up for quicker rpms.

Car appears to be a '64 (disc brakes weren't standard until '65) -- so you might be running drums -- so change that out to the disc in the rear

Upgrade your Master Cylinder to a dual chamber 7/8" or 1" (depending on your preference for hard or softer pedal). The '64 had a single master cylinder.

Sorry it took me so long to get back on line, The car is a 66 AC/4 spd disc brake car that most likely had a 427 originally in it according to one of the old vette guys I showed it too.

I have a jeep cherokee box and I'm hoping to do that mod to it but not by next Sunday when I go autocrossing in the new SCCA SOLO CAM class they just came out with. I would like to try the goodguys autocross after I get it more sorted out.

I've already done a dual circuit master mod because the original scared the crap out of me when it went to the floor one day!

At one point it was drag raced and the rear end was triangulated with a center link to the bottom of the pumpkin. The 64 front end was grafted on I assume after what appears to have been a pretty serious case of track rash. Really the body is in pretty crappy shape but the birdcage is worse.

How do I get the 3" of camber?

[doubl0h7]

Originally Posted by ProTouring442

Welcome! What part of Tennessee? I'm on the outskirts of Knoxville, in Loudon County, near Farragut.

I'm in Murfreesboro but my brother lives in West Knoxville

[GregWeld]

Ah ha! That explains the '64 clip on it. I ASSumed you'd done a typo.


The track alignment would need to be done by a competent alignment shop -- preferably one that is knowledgable with racing. Check around and find some shops that track cars or do set up and see where they take their stuff.


That's 3 DEGREES not inches BTW.

[rustomatic]

I had a few sets of those white KYBs in my old Mustang years (otherwise known as teens and 20s)--they should be sold with mouthguards, with a warning against the acquisition of awesome drifter dents on your quarters. The old school Konis are a huge improvement, but they do seem to need maxed-out adjustment on relatively mild (front) spring rates. I've only got about 600 pound springs (cut down a bit) on the front of my Falcon, and to minimize bob in the largest of quick rises in the road, I've needed full rebound adjustment. Nevertheless, the Konis are awesome, but technology has led to much nicer units (for lots more money). I believe the Konis still warrant solid vintage racer cred...

There's a dual-adjustable yellow Koni (instead of the red classic) that nobody seems to sell, but the people at Maeco Motorsports seem to have access...