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Taking the C5/C6 platform to the next level [GSpeed Chassis scan]
Hello forum members, the time has come to begin the journey with the C5 and C6 platform to take them to the next level of performance on the race track.
The corvette has inherent issues with the suspension geometry that allowed the corvette engineering team to meet the needs of all the consumers and grocery getters as well as having a car that performs really well for what it is!
When we build a race car, we get rid of those compromises as we have one goal. Max grip on track and the best handling car we can build.
3 years ago, we did this same program to the Gen2 viper. Scanned the frame, optimized suspension pick up points, CAD modeled everything, built it, raced it, won with it.
The time has come for the same work to be done with the Corvette.
Follow along as we build some bad to the bone race car parts!
Scanning the Viper front suspension
Viper chassis and suspension cad model
Completed front suspension. Notice the adjustment built into the frame, so we could tune the cars roll centers and anti dive.
Completed program. Penske shocks, ride height adjustable independent of spring preload, brembo GTLM brakes, had fabricated suspension parts, billet upright that you cant see.
On track at Hallet. Widened track, FINSPEED wheels, Michelin slicks. Car makes 770rwhp with a motec ECU and Emco trans.
We plan to scan the entire chassis, as we have roll cage kits to build for customers, and several on board for the suspension package. This is just the beginning!
Creaform scanner targets placed. This allows the scanner to recognize where it is, and allows you to rescan later if necessary as long as the targets are in the same spot. The scanner will read .002 accuracy on smaller parts.
Drivers seat area scanned.
Corey, our engineer scanning the chassis, and the scan in real time on the lap top.
Our first order of business is designing a rollcage and billet aluminum rollcage pads to help the install of the rollcages in cars. We hand fabricate them now and it takes over 40 hours to do this by hand. We hope to get this under 10 hours.
We will update more as we go along! Exciting times!
2014 NASA Texas TT1 Champion
2015 NASA Texas ST1 Champion
2018 NASA TTU & TT3 National Champions
2019 NASA ST2 National Champion
2019 NASA Texas TT2 Champion
2020 SCCA Majors COTA GT2 pole sitter
2020 SCCA Trans Am Road Atlanta SGT Winner
2022 NASA National Champion ST2
2023 NASA National Champion ST2
2023 NASA National Champion TT2
I really want to build a Viper Gen 2 coupe as a barely legal street car that is a track assassin. Hard to beat the curvy looks of the GTS body.
The Gen 2 cars sound so much better than the Gen 3/4/5 cars with their side exit exhaust. The Viper Gen 2's also remind me of European race cars from the 60's.
We ran out of targets for the weekend but we were able to get most of the center of the tub scanned! Probably 2-3 more days of scanning and then we can begin the post processing and solid modeling.
Awesome. I'd like to see the results for sure. Should answer some questions
I never measured to figure out why the c5z is such a beautiful handling car stock, and still handles well with mods unless you get way out into left field, whereas the c6z, at least my early ones, handles like garbage pretty much no matter what you do.
The difference is not going to be noticed by those who are not trailbraking hard and bringing the cars into corners with significant yaw angles off throttle.
But the c6 just would never do it and I suspected it probably had to do with a few things: I'll be curious if I guessed correctly
1-rear bump steer and/or caster?
2-some weird combination of extra wheelbase plus aluminum frame harmonics?
i know for a fact the abs was garbage on the early c6z's and the hydraulics were so fucked up you couldn't even disable it effectively for correction without replumbing the car. It delayed the rear brake activation and also refused to allow yaw on the brakes even with the nannies supposedly off.
But it I also seemed to need be able to get the handling right even off the brakes and I assumed they changed some geometry for the worse.
I also always noticed that neither Car really liked wider front tire offsets
finally it always seemed like for autocross the cars could have used more Ackerman.
It always seemed like the cars had way too much anti squat and would not put power down as well as they should either.
If you get it analyzed I'd love to know if I made good guesses or was way off.
I never measured to figure out why the c5z is such a beautiful handling car stock, and still handles well with mods unless you get way out into left field, whereas the c6z, at least my early ones, handles like garbage pretty much no matter what you do....
I agree. I had a C6 I used for TT and then got the racing bug and got a C5 FRC years ago. The C5 feels like a smaller car and rotates much better in off throttle situations. I swapped the C6 suspension mods to the C5, so pretty apples to apples comparison.
I never measured to figure out why the c5z is such a beautiful handling car stock, and still handles well with mods unless you get way out into left field, whereas the c6z, at least my early ones, handles like garbage pretty much no matter what you do.
The difference is not going to be noticed by those who are not trailbraking hard and bringing the cars into corners with significant yaw angles off throttle.
But the c6 just would never do it and I suspected it probably had to do with a few things: I'll be curious if I guessed correctly
1-rear bump steer and/or caster?
2-some weird combination of extra wheelbase plus aluminum frame harmonics?
i know for a fact the abs was garbage on the early c6z's and the hydraulics were so fucked up you couldn't even disable it effectively for correction without replumbing the car. It delayed the rear brake activation and also refused to allow yaw on the brakes even with the nannies supposedly off.
But it I also seemed to need be able to get the handling right even off the brakes and I assumed they changed some geometry for the worse.
I also always noticed that neither Car really liked wider front tire offsets
finally it always seemed like for autocross the cars could have used more Ackerman.
It always seemed like the cars had way too much anti squat and would not put power down as well as they should either.
If you get it analyzed I'd love to know if I made good guesses or was way off.
What is the difference 06-08 C6Z engine cradle and the 09-13 cradle?
What are you trimming on the drop spindles?
Thanks!
It had to do with either the ZR1, or the XLR and their placement of the engine/mounts.
Youll notice on the scan, that we scanned some of the table... This part needs to be trimmed in order to create a fully functional 3 dimensional scanned part.
05-18-2018, 06:52 PM
Taking the C5/C6 platform to the next level [GSpeed Chassis scan]
