HP loss w/a Corvette IRS

[ClassicComp]

anyone know huw much percent of parasitic loss these soak up?

[ski_dwn_it]

anyone know huw much percent of parasitic loss these soak up?

I have been racing an IRS vette for the last 8+ years and just recently switched from a very optimized IRS setup that pulled 1.37 60' times to a solid rear conversion that I came up with that completely bolts in to these C4 corvettes.

In converting over my car gained .25 sec in the 1/4 and my best 60' time was 1.34 with the rear wheels (convert it to front wheels however you like).

There is a HUGE difference in efficiency you gain over the IRS. It has way too many angles happening and I used to break stuff right and left. And hell for that matter sometimes right and left at the same time! lol.

For drag racing the IRS is anything but the desired setup. I am MUCH happier now after moving away from it.

If you want to know the details of my setup, please feel free to email/IM me.

Here is a shot of the vette with the solid rear:



www.azzatochips.com

[ClassicComp]

road race car,going straight is boring for the owner....

[ski_dwn_it]

road race car,going straight is boring for the owner....

Not sure if I follow your post. You asked about losses; I explained what you asked....

You are road racing? Even if you are, you are loosing power, I used to be able to tune my suspension to gain 2 mph at the end of the track- but it hurt the 60' times alot and made things break too.

Again too many angles. If you could make the rear 2x as wide you could greatly lessen the angles happening as your suspension moves and keep efficiencies up, still probably would not be as efficient because of again the angles, but it might be better. Also would look pretty stupid going down the road with the azz of the car 2x as big as the front. lol

[af2]

road race car,going straight is boring for the owner....

Not sure if I follow your post. You asked about losses; I explained what you asked....

You are road racing?

Again too many angles. lol

I'm still waiting for a #. Not a complete suspension change. That is not apples for apples. I have yet to see U-joints that aren't binding add to that #.
I would feel comfortable with comparing it to a 12 bolt.
Road racing seems to like the independent over a solid rear so any little loss would be made up quickly by handling characteristics.

[ski_dwn_it]

road race car,going straight is boring for the owner....

Not sure if I follow your post. You asked about losses; I explained what you asked....

You are road racing?

Again too many angles. lol

I'm still waiting for a #. Not a complete suspension change. That is not apples for apples. I have yet to see U-joints that aren't binding add to that #.
I would feel comfortable with comparing it to a 12 bolt.
Road racing seems to like the independent over a solid rear so any little loss would be made up quickly by handling characteristics.

If you watch TV like the Rolex road racing - all those vettes are equipped with solid rear axles.

Again I gained about .25 tenths and my MPH went up about 3MPH on the bigend. That alone was ~3% gain.

[RCJ]

My brother road races a vette.It dyno at 435 rwhp I would guessed 540 at the flywheel.The dyno operator said motors that had made 510 at the flywheel had made 410rwhp.Thats with a 6speed trasmission.

[ClassicComp]

can't change the rear axle assembly design in a Vintage road race C2 Corvette.

[vetteman9368]

can't change the rear axle assembly design in a Vintage road race C2 Corvette.

check out dragvette.com. his 6 link setup for the C2 C3 IRS should help.

[ski_dwn_it]

can't change the rear axle assembly design in a Vintage road race C2 Corvette.

check out dragvette.com. his 6 link setup for the C2 C3 IRS should help.

Even with those setups your still leaving all the power robbing angles adn joints.

Here is what you need: CLick photo for slide show:

[ClassicComp]

What part of NOT LEGAL IN SVRA is difficult to understand???
Why the puddling on the welds?