Originally Posted by HDDP

After installing the Sprint Booster this morning, I had a chance to sneak the car to my secret testing road tonight after work, Little Tujunga Canyon Rd. This canyon is the closest thing to the road courses I normally race the car on and very isolated. So, I got a chance to break the law without impunity and test this little gizmo before I hit the track next weekend.

I immediately noticed the improved throttle response in neutral. Idle to 3,000 RPM happened with a quick "BLIP" of the pedal. This will help immensely for heel-toe down shifts (for those of you interested).

The first part of the road is about three miles of straights and sweeping curves, during which I played with the throttle to see what the SB had changed in the car. 1st gear launches were very easy and smooth, but I could "GOOSE" the throttle to make the car lunge if I got too aggressive with the pedal. I did a few start-stops in 1st and didn't find anything difficult with the altered (improved) throttle response if I were driving on city streets.

Perhaps because of the fair amount of modifications on my car, (disabled TC, ESP & 400 lbs lighter, etc.) I could do a standing burn-out in 1st gear for the first time. (I have racing slicks and they were cold). After goofing around for a few minutes I took the car to the road and adapted to the SB in a matter of moments. (nothing scary here guys).

In my estimation, 40-50% increased throttle response during the first 20% of pedal travel, 80% throttle response during the first 50% of pedal travel, VS the OEM set-up. For my application this will help with my heel-toe downshifts because I can bring the RPM's up much faster to match gears and car speed.

IMO, the Sprint Booster is really kind of a minor drag racing modification. It definitely gives you a quicker "off the line" feel. And for the daily driver Crossfire it will make your car feel more powerful (launch faster) , but not increase HP... This is what you expected the Crossfire to accelerate like... For those of you driving on slick roads in the winter, not a good idea, especially if you disable your TC !!!

MMZ: Thanks for hooking me up with the product, I'm happy, it will definitely make a minor difference in my track times...