Thrasher 100 & 108 with alky kit?

[rb68rr]

How many of you run the Thrasher 100 or 108 with their SMC alky kit? With a stock turbo and stock injectors witch one would probably work best? I also understand the car will run richer using alky. With a Thrasher chip the fuel pressure is suppose to be set at 45psi, so how do you tune for this? Just ordered the SMC kit and can't wait!!!!! Thanks, R.B.

 

[timstips]

HEY UNGN!!!!

You're the Thrasher man. What's the answer?

 

[ES1]

Unless your car is really knock free (very well tuned) I think the 100 is the way to go. Some of us had problems (very funny readings, but I cannot remember what they were) using the alky & the Thrashers, others have had no problems.

 

[RobR]

I run the Thrasher 92 in mine. Both when I had stock injectors and the 50's. I backed the fuel pressure down to 42-43psi and use the alcohol as added fuel. The block learns are near 128 in all cells except cell 15 where it tries to add fuel. I run 100% denatured alcohol with a pump speed of 8. I get 0 knock, which is what I tune for. My O2s are around 750-770 in 3rd gear. 800ish in 1st and 2nd gear.

Just don't go crazy with the boost at first. It took a long time to get mine dialed in.

Now its time to hit the track and see if I can get some ET with my MPH I've been running. New trans and a 9/11 converter sure do make for some fun street driving

 

[blackbuick87]

With the Thrasher 108 you may get a lot of transitional knock (knock on the shifts, when you step on it, etc). I have tried the Thrasher 108 and 100 and like the 100 better. The only knock you have to tune for is top end 3rd gear knock

 

[YGETV8]

I tried a Thrasher 92 with my old stock combo in my GN and it just didn't run well. Only ran it for a day or so and got rid of it.

A few weeks ago I installed my PT51 and Blue Tops which came with two chips, one of which was a Thrasher 108. I had tuned it with the 93 chip to about 22-23 psi boost and it was running well. I just installed the 108 a few days ago not expecting much and DAMN! I turned the boost down a couple since it had more timing and the car felt awesome even with the lowered boost! Spool up is pretty good and I had read that I'd hate the 51 with a stock converter! I'm now back up to about 22 psi with just a little alky tweaking and I really like it! I don't see any transitional knock but I haven't noticed any since my Power Plate install. Gonna try to tune (slowly) for about 23-24 psi and see how it goes.

BTW, what is the timing* on the 108? I bought everything used so I have no info on it. Thanks!

 

[RobR]

I have the PT51 with 50# injectors and the stock converter was brutal with this setup. I went from doing 1.6-1.7 short times to doing 2.0-2.1 short times. Talk about disappointing I was slower to the 1/8 than the stock setup. But could run 5-8mph faster at the big end.

Maybe its because I have 3.27 gears and couldn't pull up the rpm?

 

[blackbuick87]

Did all TTA's have 3.27's?

Jay I liked the way the 108 pulled up high but I would get a little knock if I tromped on it and didnt have race gas.
I asked the same question about the timing, but no one could say for sure. General consensus was around 28*
The Thrasher 100 I am running now has around 26* I think and it pulls just as well as my 108. HUGE difference over the RA93

Anyone running alky on a street chip is really missing the boat

 

[RobR]

Originally posted by blackbuick87
Did all TTA's have 3.27's?

Yep

Anyone running alky on a street chip is really missing the boat

That's the problem I'm having. I can only run street chips because of the low timing. My car has never liked timing either stock or modified. I just can't get it to stop the KR from coming on. So I just play it safe and run low timing and more boost, seems to work. With the new converter, spool up is very fast. Just like the stock setup was.