Real-time timing advance @ WOT???

[Steve03GT]

Has anyone, with a boost controller, plugged into the ALDL and noted the timing advance/retard during WOT? GM calls their device a Tech II; I'm not sure what D-C calls theirs. A buddy of mine and I made several side by side runs today to compare his Hallman-equipped Cruiser to my stock Cruiser. When I got the move from a stop or a roll, most times I pulled a length or two and held it there til around 70mph when he began to gain and proceed to blow by me bigtime. I drove his car and it definitely has a lot better off-idle throttle response, probably due to his going into boost almost immediately. His gage registered steadily between 11-14 lbs @ WOT, which brought up the question of why do I pull him initially if he's running more boost than I. We're thinking the PCM may be pulling timing out due to the boost being outside the PCM's parameters or something like that. Anyone have any ideas?

[Ian-PT-GT]

Traction.

I have done about 50 passes at the track and found that in the stock configuration the car made 2.25 sec at the 60 feet mark, with the Hallman boost controller made 2.53 sec. This means that because the turbo is spooling so fast, it makes the tires loose traction and slows you down. You percieve that it is at the 70MPH that he is blowing you by, but in reality he is doing it long before that mark. remember, he has to gain those .3 seconds and then make up the lost track to catch you with should be happening just before the 1/8 mark at the strip.

With the controller I was reaching the 1/8 mark at 72 MPH and at the 1/4 mile I was pasing the lights at 89.8 MPH with an ET of 15.4 sec with a 2.53 sec at the 60 foot mark, this is where I need to improve. If I lower the 60 foot mark to 2.1 (.2 improvement), I could make 14.9 or 15.00 at the 1/4 mile.

In closing, if you install a two stage boost controller in your car and take of with just 8PSI or lower and change to 14 PSI in second gear and up he will never catch you.

Ian

[Steve03GT]

quote:Originally posted by Ian-PT-GT

Traction.

I have done about 50 passes at the track and found that in the stock configuration the car made 2.25 sec at the 60 feet mark, with the Hallman boost controller made 2.53 sec. This means that because the turbo is spooling so fast, it makes the tires loose traction and slows you down. You percieve that it is at the 70MPH that he is blowing you by, but in reality he is doing it long before that mark. remember, he has to gain those .3 seconds and then make up the lost track to catch you with should be happening just before the 1/8 mark at the strip.

With the controller I was reaching the 1/8 mark at 72 MPH and at the 1/4 mile I was pasing the lights at 89.8 MPH with an ET of 15.4 sec with a 2.53 sec at the 60 foot mark, this is where I need to improve. If I lower the 60 foot mark to 2.1 (.2 improvement), I could make 14.9 or 15.00 at the 1/4 mile.

In closing, if you install a two stage boost controller in your car and take of with just 8PSI or lower and change to 14 PSI in second gear and up he will never catch you.
Ian

I totally agree; however, my friend has 1/4mile passes that are for to numerous to enemuerate.Having said that, he would've realized the traction problem and told me about it, so I don't think traction is the problem in this case. I could be wrong.[:I]