65 fi

I am curious as to weather anyone has ideas on creating sufficient down force in a C2 coupe while at higher speeds?
These old cars had a tendency to have the front end lift at higher speeds to the point where they would float. I would like to incorporate very sutle changes that may not be outwardly apparent to counter this tendency.
I am thinking some kind of uner the body ground effects?

Pop Chevy

Small front air dam.

65 fi

Thought about that but would like to find some avenue more subtle. Perhaps, more adequately venting the engine compartment, etc?

devildog

Open head lights about half-way. Seriously !

Joe

Poorhousenext

63 and 64 have the worst front end lift since they have no vents in lower fender. 65 and up GM added lower fender vents to help with under hood air pressure. 63 Grand Sports cars had vents cut in lower fenders after they realized they had bad under hood air pressure problem. They also fixed hood so it had gap at back to help vent air that way too.

So your 65 has less lift as built.

Another thing you can do, is change stance of car so the nose sits lower than rear to add down force. Again that's one of the things done with the Grand Sports racers. Easiest way to do that is with tires. Go with a smaller dia tire on front and larger one on rear.

Are you could just not do any 130 MPH + runs, that the smart thing to do....

I'm not Young and Dumb. I know I'm old and Stupid and would not be able to control myself in my 64, so I built vents into lower fenders, changed stance by using different tire dia front and rear, and added a front chin spoiler.

65 fi

The 65 is staying original. I have been on the hunt for a suitable 63/64.
Not young either but still adventuristic enough to know I should expect the unintended or unexpected (from myself). Not foolish enough to try on a public road.
Cool car btw and a chief motivator for my desire to restomod.

keystonefarm

About the only way without any body changes, air dams etc. would be to change the front end height with a shorter tire. Years ago they called it the Daytona Rake. The nose of a C-2 is the same shape as the leading edge of an aircraft wing and that means lift. Getting the nose down helps as does getting the air out from under the front end. Back when I raced in SCCA in the mid seventies the tricks were to open up /remove the back of the 65-66 lower fender vents and also allow the hood to open slightly at the rear at higher speeds. With hood pins this was easy just leave plenty of slack between the retaining pin and hood surface. 67 style BB hoods with the rear intake open or 65-66 BB hoods with the blister trim removed. Air dam's made a big difference in the handling of C-2's over 140 mph. A number of the early 63-64 racers left the headlight door motors in place and opened them about half way to break up the wing effect . Then there were the Grand Sports !!! ------------ Ken

5thvet

If you haven't seen this thread, check it out for some interesting ideas.
http://forums.corvetteforum.com/c1-a...ding-mile.html

Tcom

69 Z28 front spoiler with a little trimming

65 fi

Found this old thread as well:

http://forums.corvetteforum.com/c1-a...ft-on-c2s.html

I did write the OP of this old thread to find any conclusions Chris may have come to.