650WHP turbo car, TH400 conversion - need input
05-17-2010, 11:21 PM
#25
Trust me, with a turbo car you won't miss the T56. Your car will be so much quicker and more controllable with a RMVB TH400 you won't even look back after your first drive. With a 28" tall tire, shifting around 6600 rpm, and estimated traps of 145 you won't want to go higher than a 3.55, probably around a 3.40 of sorts... but of course that depends on how much slip your converter has up top as well. A TH400 turbo converter will make or break the combo, spend money on a good converter.
I also ran a 3.00 gear last year in my rx7 with a 30" tire, it makes for driving it so much nicer if you do a lot of highway driving or road trips at all. If you make enough power(which you should), the lack of gearing won't bother you that much.
Now these two cars could be faster with the correct gear, but with as much street driving as we do it's a lot nicer to have a little less gear.
05-18-2010, 12:28 AM
#26
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I put a 3.00 gear in mine, but its bc I have a 26inch tire and I mainly street drive. Also I found the gear local for cheap.
Most of the turbo guys on theturboforums like the 3.25 and the 3.08 gear. I may switch to the 3.25 after I get the car to the track and see what it does.
Also a 3.08 on a 28inch tire should cruise simalar to a 4 speed auto with a 3.73
Jay
Most of the turbo guys on theturboforums like the 3.25 and the 3.08 gear. I may switch to the 3.25 after I get the car to the track and see what it does.
Also a 3.08 on a 28inch tire should cruise simalar to a 4 speed auto with a 3.73
Jay
06-09-2010, 07:12 AM
#32
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I'm guessing I'm going to pick up .1-.2 in my 60' times and probably .5-.6 total in the 1/4. Street driving isn't bad... but starting from a roll isnt nearly as exciting as it was w/the m6.
Still havent gotten to the track yet though.
Still havent gotten to the track yet though.
06-09-2010, 08:52 AM
#33
06-09-2010, 09:02 AM
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Now the car is much more predictable and only really spins/floats to about 60mph...
06-09-2010, 10:22 AM
#36
The M6 was a blast to drive too.. but at the 650WHP+ mark, driving a car with that much power becomes even more unpredictable when you unload and load the suspension between each gear and just hope that the suspension gets the power to the ground. I was spinning 28" MT ET Drags on the street @ over 80mph before...
Now the car is much more predictable and only really spins/floats to about 60mph...
Now the car is much more predictable and only really spins/floats to about 60mph...
06-09-2010, 03:53 PM
#40
I agree with what both NicD and Eagle02 with having better control with a TH400. When it gets hairy with a TH400 usually all you have to do is up shift and ease off the throttle and it settles down. Most of my passes at the drag strip are pretty relaxed with only one hand holding the steering wheel making small corrections.
As for downshifting, just make sure you are on the throttle before downshifting and don't go down to 1st gear. Even with my highway gears I almost never have to downshift to 1st on the street.
Even the die hard 6spd guys usually like the TH400s after switching. I know I did.
As for downshifting, just make sure you are on the throttle before downshifting and don't go down to 1st gear. Even with my highway gears I almost never have to downshift to 1st on the street.
Even the die hard 6spd guys usually like the TH400s after switching. I know I did.
Last edited by Zombie; 06-09-2010 at 03:58 PM.