Hey guys, haven't been in this section for quite awhile. Good to be back. To recap, I just moved back to St. Paul MN. from Santa Barbara CA. So fun to be back home. Have nice 2 car garage Vette only, for winter projects. To recap ..

86' is 420hp. Trick Flow Street Kit. Sanderson Tight Fit Headers, Last mod I really need to do under the hood is the intake. So following current threads there. Currently 52mm. BBK. on stock runners, so I know this is where next biggest performance will come. Custom Higgin's exhaust, not Corvette guy, builds for Bonnyville. MegaRaptor 700R4, 373 gears.
Magna-Flows and Borla, no cat. All under the hood has less than 5K. mi. 24lb. injectors, adjustable pressure regulator etc.
Custom Chip by Larry at Camarillo Performance on Mustang Dyno.

Of course intake advice will be appreciated. My primary thoughts now are of winter projects, that do not cost much. I have to admit I am an F1 junky .. So many of the major F1 performance improvements have come from under-body aero design. As with Red Bull and the blown diffuser, now banned. So basically I want to design & build under-car aero package from front intakes to rear diffuser. Not really interested in top of car, C4 is very efficient aerodynamically. But underneath, not clean at all.

If anyone is wondering or cares .. my education is in engineering sciences and as Hang Gliding Nut always interested in low-speed aerodynamics. So any advice, experience or interest in this subject, look forward too. Best_ .. http://youtu.be/yPa4RbAj_RE

 

I am looking forward to seeing what you build. If my car lasts long enough it's a project that I would work on as well. All I got to this year was closing off the hole where the spare tire was. Intakes, I tired several and like the MR.

 

Yes, aero is most dismissed to Hp. and Torque in this discussion. But as recent racing has improved. Aero is most important. As is proved with low speed aerodynamic studies, wind tunnel tests.

Most do not understand aerodynamics .. some here do. Major improvements can be made to car with simple undercar dynamics. Not all just HP. Torque .. Best_ Look forward to further discussion/ideas

 

No good at the aero stuff but I met these intake guys at Carlisle a few years ago and they seem to know their stuff.
Mike Graycar at Corvette Plenum. www.corvetteplenum.com
He and his engineer partner do CNC machining and porting of L98 intakes. I have read a few magazine articles that said good things about them too. Not inexpensive though.

 

great you joined discussion. My point here is more aero-dynamics. Most subjects are covered here with intakes, cams and such. HP. is not the point. Performance "aerodynamic's" is the subject. Principally' For purposes here is the flow of air under the car.

Most recent racecar developments have been made with aero-design undercar .. The air-flow over C4 is best ever. But under car is poor. This is where most significant improvements can be made. Look forward to further discussion and insight. Best_

 

So look forward to seeing what you come up with too. Especially to keep the weight down (at least it will be adding it WAY down low). Would love to do this on my '96 as well, but is WAY down at the bottom of the list. The hardest part I see, is just designing around the exhaust, so you don't create a toaster oven.

 

Yes, good point. As for my car, I will design the undercar to conform to SCCA rules, so I can race in class without point deductions or dis. There is a recent post in general disc. with pic's of Diffuser: http://forums.corvetteforum.com/c4-g...-diffuser.html

It is an interesting discussion. Not sure what his knowledge of aero-dynamics is. Such as lift & drag coefficients. For now my C4 has a huge hole where spare use to reside, but 50+lbs less. So that can't be good. As we know, sparing formula's. Air flowing over top of car has farther to travel than undercar. So it speeds up, creating lift. What we want to achieve is opposite: Downforce.

Any ideas?

 

I look forward to seeing what you come up with, though also am disappointed that it will be to scca rules (no doubt, a good thing but they are restrictive).

I've often thought of building a splitter and boxing off the under engine bay (scca legal only to the bj) and then boxing off the entire trans tunnel transitioning to a tapered diffuser that eliminates the sail effect of the rear bumper cover (again, not legal except the latter half of the diffuser by scca rules), it would be cool though (or maybe I should say hot... Considering the exhaust being boxed in until the outlets).

Is your car lowered and stiff, as mentioned to really get some effects you'll need to maintain a tight and constant distance to the ground as far as my research indicates.

Best of luck and I look forward to seeing what you come up with.

 

Yes, you are so right. I may split the hairs of SCCA. My car is significantly lowered. So they cannot check undercar unless there is protest and they lift it.

My car is bump stopped to accommodate 335"x17 Kumho's.
So has literally no body lean or travel.
Good Point ..

As in low speed aerodynamic studies and in fact. There are certain factors. Ground Effect, Boundary Layer .. Lift Drag Coefficients. That is about it as it relates to cars.

Look forward to ideas and discussion. Best_

 

Yes I agree .. fun winter project' ..
Have so many ideas ..
Just glad go be back in MN. from Cali.
Have nice garage and time to invent. 'Best'_