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VetteMod - Corvette Restoration, Modding & Performance Forum

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  1. 69427

    Weight reduction: Running out of ideas.

    Did some maintenance and some minor mass reduction while I was in there. My rear rotors (stock C4 type) are worn out, which is a new experience, as the old stock C3 system never put much stress on the rear brakes. While I had the calipers and rotors off I cut/ground/filed the non-productive...
  2. 69427

    Weight reduction: Running out of ideas.

    I'm using most of the varied vintage C4 suspension pieces, but running Wilwood four piston calipers all around. They're compact and lightweight, but they don't bolt up easily with the C4 knuckles when I went to 11.75" rotors to retain my stock 15" wheels. The caliper mounting tabs competed with...
  3. 69427

    Weight reduction: Running out of ideas.

    Still keeping my eye out for a smaller (packageable) fuel tank, but in the mean time I've found another place to pull a few more ounces off the car. I have the left rear suspension apart to find where the noise/slop is coming from. While pulling things apart I noticed I can probably replace the...
  4. 69427

    Rear Brakes and Suspension.....Done!

    I had to lookup this thread again. I've got to take my differential out this winter to check out the source of the left output yoke endplay. Depending on what I see and what it costs me in time and money to rectify it, I may consider a similar setup as yours to take the side loads off the output...
  5. 69427

    Internal Body Aerodynamics

    First, let me admit these are just my opinions and observations. I welcome any clarification or corrections. My understanding is that the (front axle) caliper location is heavily influenced by whether it is front or rear steer/rack positioning. (As everyone here knows) the old Corvettes were...
  6. 69427

    Internal Body Aerodynamics

    You lost me on the connection between those calipers brackets and anti-dive. Can you clue me in? Thanks. (y)
  7. 69427

    Weight reduction: Running out of ideas.

    We're on a similar wavelength. I looked at several C5 tanks on ebay yesterday to see if that would be a workable option. Lots of availability, but I need to still get some packaging info. The shape is certainly odd, so I still would need to get some dimensions and internal capacity, and the tank...
  8. 69427

    Weight reduction: Running out of ideas.

    Running out of better and easier weight reduction ideas, so I'm looking at two items this winter. 1) Going to try to locate a used C3 fuel tank for modification. I believe I mentioned this before, but I'm thinking of cutting off the left half of the tank, and welding in a new sidewall just to...
  9. 69427

    Weight reduction: Running out of ideas.

    $450 is a bit out of my budget, but I certainly would love to take more weight out of the left side of the car. I'm presently using seats out of a '79 Corvette (Thank you again Karsten!). IIRC they are 12# lighter each compared to the original '69 seats, and heaven knows, have significantly more...
  10. 69427

    EXTERNAL AERODYNAMICS

    I like the headlight bucket method. I've wanted to replace my flip up headlights with fixed rectangular ones for years. I pulled the whole setup out of a late 80s/early 90s Oldsmobile that used the smaller-than-usual rectangular headlights. I then wanted to cover them and the bucket in easily...
  11. 69427

    EXTERNAL AERODYNAMICS

    I'm definitely interested in your results. (y)
  12. 69427

    EXTERNAL AERODYNAMICS

    At a minimum I need to do that. (y) Right now there's vented (atmospheric) pressure on both sides of the actuator diaphragms, so there's nothing additional trying to help the springs keep the headlights down. I believe I have a non-GM check valve in my hose collection that I can plumb into the...
  13. 69427

    EXTERNAL AERODYNAMICS

    Yesterday's track day went well. Nothing broke or got scratched up. A few conclusions I came to during the day: 1) I need to brake later. I'm still trying to get accustomed to how much quicker the car decelerates with the decreased weight. 2) The car is very neutral through the corners, with a...
  14. 69427

    EXTERNAL AERODYNAMICS

    Thanks. (y) I was probably braking for the 90* right hand corner just out of the picture.
  15. 69427

    EXTERNAL AERODYNAMICS

    Had a good time at the last track day a few weeks ago. The car ran great, the extended belly pan length didn't break, and the air dam extension (downward) got just enough scratches on it to let me know that's as low as I want to go for now. The next track day is this Sunday. For this weekend I...
  16. 69427

    EXTERNAL AERODYNAMICS

    My car has those same openings. I haven't had engine overheating issues, so I've been incrementally blocking off the air entrances to the radiator in an effort to reduce the amount that eventually finds its way under the car, increasing lift and drag. I have both front outer grilles blocked off...
  17. 69427

    EXTERNAL AERODYNAMICS

    I'm not following what that was (under the engine support). Are you referring to something other than the air dam under the radiator support on some other cars?
  18. 69427

    EXTERNAL AERODYNAMICS

    That's pretty much the exact setup I've been running for several years. (y) Last week I added an additional one inch lower strip to it for track days. It comes off with six bolts for street use. Behind the airdam I have about four feet of Lexan bellypan to discourage air from just balling up in...
  19. 69427

    Weight reduction: Running out of ideas.

    IIRC the stock fuel tank in my car is 16 gallon capacity (and twenty something pounds empty IIRC). I've been kicking around for a while the possibility of fitting an 8 to 10 gallon tank from a junk car somewhere and adapting it to mine. The smaller tank should be lighter and smaller in size...
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