I am looking at getting the TMO stage 3 chip for each one of my cars. I need it for maintaining boost during shifting. Anyone recommend it or not recommend it?
Thanks,
Daniel
Thanks,
Daniel
What is everyone's opinion on the TMO Chip?
V8Diet
1 - 6 of 6 Posts
For some strange reason when I use that feature on my TMOIII ECU I get a knock spike after the shift which pulls timing. It may just be my setup (14b, 17psi, 550s, Starion FMIC, Hacked MAS, 2G pistons, 2 1/2 DP) but I have heard of some others having the same issue. I never did see a definite solution.
Just my experience, your mileage may vary.
Rick - '91 GSX
Just my experience, your mileage may vary.
Rick - '91 GSX
are you talking specifically about the no-lift-to-shift feature?
http://www.tmo.com/prod/eprom/drag.shtml
as i understand it, there are 2 rev limiters in the stage 3. both utilize the clutch switch, with one limiter utilized with the car moving and the other while it is stopped (under 7 mph, i believe).
what i have been trying to find out (not trying to hijack this thread), is if people are bouncing off the main rev limiter (7500 or so rpm) as the clutch disengages (mechanically) but before the clutch switch is engaged at the floor and the second, higher (6000 or so rpm) rev limiter is actuated?
for those of you who don't read referenced links, this is all done with the throttle wide open, foot to the floor. hence the no-lift part. which, btw, scares the shit out of me. that first time trying it should be interesting.
i have heard of theories about the use of the cruise control switch for the second, higher rev limiter. which activates at the top of the clutch's throw. but have never seen or heard of the theory in practice.
again, not trying to hijack this post, but expressing concerns with this mod that can be confirmed or disregarded easily.
Ben
http://www.tmo.com/prod/eprom/drag.shtml
as i understand it, there are 2 rev limiters in the stage 3. both utilize the clutch switch, with one limiter utilized with the car moving and the other while it is stopped (under 7 mph, i believe).
what i have been trying to find out (not trying to hijack this thread), is if people are bouncing off the main rev limiter (7500 or so rpm) as the clutch disengages (mechanically) but before the clutch switch is engaged at the floor and the second, higher (6000 or so rpm) rev limiter is actuated?
for those of you who don't read referenced links, this is all done with the throttle wide open, foot to the floor. hence the no-lift part. which, btw, scares the shit out of me. that first time trying it should be interesting.
i have heard of theories about the use of the cruise control switch for the second, higher rev limiter. which activates at the top of the clutch's throw. but have never seen or heard of the theory in practice.
again, not trying to hijack this post, but expressing concerns with this mod that can be confirmed or disregarded easily.
Ben
I really like my stage III mods too. The stutterbox is very useful. I did notice a knock spike when using it too. If I just floor it the knock goes way up but if I rev a little first to get the RPMs up and then ease into full throttle it works great with no knock.
Rick - '91 GSX
I've never run into this. The clutch switch is at the top of the pedal movement and actuates way before the clutch disengages. Mine switches to 6200 rpms (I think) when shifting. Adjusting where the switch actuates may be a good way to fine tune the shift point.
Rick - '91 GSX
Joined
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4,231 Posts
Usually while drag racing you shift so fast anyway that using the bottom switch is enough. My clutch cut is wired to the bottom switch and I've never had a problem.
Addressing the original question: to me, the TMO features let you take full advantage of all the work and mods you do to your car. The key to making the car quick in the quarter (low ET) is driving the hell out of it. Launching with boost, not lifting on any shift, etc are part of the formula. With smaller turbos, the no-lift-to-shift feature doesn't really sustain boost during shifts, as much as put your RPMs consistently in a place where you can extract the most power when the next gear engages. Same with the stutterbox (I can only build about 6 lbs at the line with my Big 16G). With bigger turbos you get all that consistency PLUS additional boost off the line and during shifts. Nice combination.
Addressing the original question: to me, the TMO features let you take full advantage of all the work and mods you do to your car. The key to making the car quick in the quarter (low ET) is driving the hell out of it. Launching with boost, not lifting on any shift, etc are part of the formula. With smaller turbos, the no-lift-to-shift feature doesn't really sustain boost during shifts, as much as put your RPMs consistently in a place where you can extract the most power when the next gear engages. Same with the stutterbox (I can only build about 6 lbs at the line with my Big 16G). With bigger turbos you get all that consistency PLUS additional boost off the line and during shifts. Nice combination.
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