ard
10-01-2007, 04:35 PM
So, last year I went to the drag strip and ran a 15.7 @ 88 mph at 10 pounds of boost and stock everything except for exhaust. Auto tranny, etc.
Rebuilt the engine over the winter, swapped over to an M90, got a t4, 3" exhaust, no mufflers, eBay intercooler, custom piping.
Got it running last weekend, gave it a nice break-in, took it to the strip, and this is what happened:
Run 1: 15.72 @ 87.25 mph, 2.4121 60 ft
Run 2: 19.79 @ 66.96 mph, 2.7831 60 ft. Clutch slipped through 3rd gear, aborted the run
Run 3: 15.92 @ 86.39 mph, 2.4179 60 ft
Run 4: 16.14 @ 86.36 mph, 2.4809 60 ft. Don't know why this run was so much slower, but the car felt noticeably less powerful. So I let it cool down for a while. Also, started to play with the boost here. Or at least try to....
Run 5: 15.58 @ 87.08 mph, 2.2681 60 ft. Fastest run of the day... Maybe there IS something to this letting it cool down thing :-P
Run 6: 15.70 @ 87.37 mph, 2.3741 60 ft
Run 7: 15.65 @ 87.55 mph, 2.3657 60 ft
I have to admit, I was disappointed with my times (I was hoping for 14s), and also, no matter what I did with my controller, I couldn't get any more than 8.5 pounds out of the damned thing. I figured 7 relatively uneventful runs was pretty good for a fresh rebuild, so I stopped running, and saved my clutch for another day. I was really unimpressed until I got my 15.58.
And then at some point, I clued into something.... 8.5 pounds is pretty much stock boost, once you lose the stock IC. What the hell is wrong with my controller? Conclusion: no idea. I took it apart today, cleaned it up, etc.
Put it back in the car, loosely tensioned so as not to blow stuff up, and off I went. Holy CHRIST! 12 pounds now, and it's a completely different car. I can't wait to take it to the track again and hopefully hit 14s :D
The best thing I took away from the track was that I can launch the car pretty consistently. This is good.
I need a 90+ and wideband AFR. NOW
Good god I love boost
Rebuilt the engine over the winter, swapped over to an M90, got a t4, 3" exhaust, no mufflers, eBay intercooler, custom piping.
Got it running last weekend, gave it a nice break-in, took it to the strip, and this is what happened:
Run 1: 15.72 @ 87.25 mph, 2.4121 60 ft
Run 2: 19.79 @ 66.96 mph, 2.7831 60 ft. Clutch slipped through 3rd gear, aborted the run
Run 3: 15.92 @ 86.39 mph, 2.4179 60 ft
Run 4: 16.14 @ 86.36 mph, 2.4809 60 ft. Don't know why this run was so much slower, but the car felt noticeably less powerful. So I let it cool down for a while. Also, started to play with the boost here. Or at least try to....
Run 5: 15.58 @ 87.08 mph, 2.2681 60 ft. Fastest run of the day... Maybe there IS something to this letting it cool down thing :-P
Run 6: 15.70 @ 87.37 mph, 2.3741 60 ft
Run 7: 15.65 @ 87.55 mph, 2.3657 60 ft
I have to admit, I was disappointed with my times (I was hoping for 14s), and also, no matter what I did with my controller, I couldn't get any more than 8.5 pounds out of the damned thing. I figured 7 relatively uneventful runs was pretty good for a fresh rebuild, so I stopped running, and saved my clutch for another day. I was really unimpressed until I got my 15.58.
And then at some point, I clued into something.... 8.5 pounds is pretty much stock boost, once you lose the stock IC. What the hell is wrong with my controller? Conclusion: no idea. I took it apart today, cleaned it up, etc.
Put it back in the car, loosely tensioned so as not to blow stuff up, and off I went. Holy CHRIST! 12 pounds now, and it's a completely different car. I can't wait to take it to the track again and hopefully hit 14s :D
The best thing I took away from the track was that I can launch the car pretty consistently. This is good.
I need a 90+ and wideband AFR. NOW
Good god I love boost