Jim, yes I have a bet with Matthew on that, but I am confident it will be one of the lightest on the track regardless of the net weight. What did you get your old car down to?

One of the really nice things about the matter cage is that it only weighed about 60 lbs before the door bars were added, so total should be well under 75.

Not many options left on the weight, except for removing the bumper shocks, or whatever they call them on a waterpumper.

Remember, those door panels are saving me at least 100 lbs per side! And don't even get me started on the helium in the tires.

 

Cool Car Mark!!! I'm very jealous.....

I plan to turn my own 996 into a race car in a few years (after it's done performing DD duties) so I really enjoy seeing your pics.

 

Mark,
In club race form my car was about 2800 without ballast. That was with two seats and carpet in the passenger area but no carpet on the drivers side, no door panels, no window on the drivers side, light carpet (felt) in back, no mufflers, no cats, no airbags, all the insulation behind the plastic removed, etc. My wheels were very light one piece forged magnesium BBS racing wheels.

I had an Optima battery which would have been a little heavier and my cage was heavier. You should be close but I wouldn't bet too much on being under 2800.
Jim

 

What are you transporting a kidney?

 

Seal gray and Boxster red! great Combo! I have not seen that on a 911. got any pics of the car before vs after the transformation?

 

That's his lunch. Those enduros get long.

 

Jim what headers/muffler/cat set up did you run on you x51. Thanks

 

I had straight pipes with the stock X51 headers.

 

Did you loose low end torque out of turns?

 

Yes. The car had no torque below 4500 rpms, but above 4500 it screamed. We actually had a design to put a moveable flap in the exhaust that would add backpressure at lower rpms and open up above 4500 but we never got it working. I figured as soon as I perfected it PCA would outlaw it anyway. It would have freaked the corner workers out. Coming out of the corner the car would have had a muffled, hissing sound then all of a sudden it would have opened up and roared. Oh well. Damn I put a lot of effort into that car.

 

Jim, sounds like a poor man's turbo setup. I like it!

 

Jim, thanks pm sent.

 

Have a buddy that is using an aston martin variable exhaust valve that is electical and vaccuum activated. May want to look into it as he plumbed it inline himself...

 

You can actually buy in-line butterfly valves from Summit Racing but they take way too long to open and close. I wonder if that's what your friend used.

 

Nope - he used the stock aston martin (vantage maybe) part that is part of the exhaust system. When tooling around at low RPM it stays closed, but when you get on it the valve opens and lets the exhaust run free. It has both an electrical and vaccuum hookup which indicates that it may respond to both quick depression of the throttle (electrical) and increases pressure (vaccuum/mechanical) which may get around the delay given that the electrical impulse will move much faster than the mechanical one...I will give him a call and get more info.