The idea of sacrificing power for torque doesn't make a lot of sense. The engine is going to make max horsepower with a specific combination of AFR, ignition timing, and cam timing at a specific rpm. Whatever torque/power it makes at 4500 rpm has nothing to do with what it produces at 6000 rpm. If you look at a typical ignition curve, timing at full throttle advances starting at ~1500 rpm, maxes out at ~2500-3000, and stays the same up to redline. This is a generalization going back to the days of distributors and carburetors, but the principle still holds true. Cam timing has a huge effect on power production. Advancing the cams favors lowend torque whereas retarding them improves high rpm power. Since our engines have VVT we get the best of both worlds-advanced cams at low rpm and retarded cams at high rpm. You don't have to choose one over the other. The other variable is throttle opening. The faster and farther the throttles open for a given gas pedal movement, the faster the car feels. I suspect that this is what Doug does with the Race tune. The car FEELS faster because the throttles are opening farther and more rapidly with a given pedal movement. However, I suspect that if you dynoed both tunes there would be no difference in horsepower. BMW does this on certain models. I had a 2003 Z4 3.0 with a "Sport" button. In Sport mode the throttle response was much quicker and the car felt a lot faster, at least at part throttle. All the sport button did in reality was increase the rate of throttle opening, creating the illusion of more power. It felt way better and was much more fun to drive in Sport mode, but it wasn't actually faster. Regardless of what Doug calls it, the Race tune makes the car even more fun to drive.

 

I don't think that's right. I just got back a few responses from Brenspeed about purchasing a tune. It's a little pricey since I didn't buy a tuner from him, $110 for a single tune. I haven't done it yet but was thinking about it just to have a different one. Also since I have Airaid CAI Brenspeed say they prefer the MVT tube removed which utilizes the entire 4" diameter tube. Brenspeed says they got more power out of it that way so I was thinking of trying it at some point. So as far as I know I could call them, give them the specs and he'll send me a tune for $110.

 

Awesome vid Bill!

I also love all the how to vid's you make. Makes it easier for us first time installers!

 

Why couldn't you make a tune that had the Torque under 3000 and all out race tune acceleration for 3000 and up because anytime i'm above 3000 i'm pretty much going to want all the throttle response and power i can get. Seems like you would have the best of both worlds? I'm wondering as to why we can't have both in one tune?

 

Have to ask Doug that one. Maybe it could work.

I also have the airaid CAI and removing the venturi tube didn't do any good according to the dyno.

 

Removing it on a car with no tune? Or removing it on a car that already has a tune?

 

You mean you had it tuned on a dyno and couldn't get any more power out of it with the MVT out?
Well that's what Bamachips also said but Brenspeed said they *did* get more power out of it with MVT out so I might try it out for the heck of it.

 

I just ordered a Xcal2 from Doug...I went w/ the 93 Perf, 93 Torque, and 93 Race tunes.

 

Nice! You won't regret it.

 

Doug came to that conclusion when he borrowed my car to test the airaid CAI on the dyno. At first he ran it w/o a tune and it was just too far outside the computer's parameters to run good. Then he tuned it and he got the same result as having the tube in there. Maybe he couldn't get anymore power because the tune was just that good to begin with.