cwh
cwh SuperDork
8/5/11 7:22 p.m.

OK, we have all seen the ridiculous power numbers that this midget motor can make with a simple turbo. Has me thinking fast thoughts. BUT, what transmission can handle 700hp and 600ft pounds? Will I have to go to a drag built Powerglide, or can a 4L60E handle this? Can a regular T-5 deal with it? Not that I'm going to do this next week, but there are some derelict RX7s around here for cheap. I think I can do this for challenge money. Maybe.

Gearheadotaku
Gearheadotaku Dork
8/5/11 7:56 p.m.

T5? No. 4L60E? No. 4L80E? With proper build up, yes. Much cheaper route would be a well built TH350 or TH400. Muncie 4-speed (M-21, M-22) could do it too. A properly prepped T56 could do it as well. You'll have more money in a trans than the motor most likely. Then you need to make a rear end to handle it and a suspension that will hook up, and then.....

Ranger50
Ranger50 Dork
8/5/11 8:54 p.m.

If you do ALL the available upgrades to the 60, you may as well get an 80 halfass built for less money and will handle more power. The weak links in the 60 is the powerflow plus gearing. No way do you need a 3.06 first gear in ANYTHING with an automatic.

HiTempguy
HiTempguy Dork
8/5/11 9:09 p.m.
Gearheadotaku wrote: T5? No.

There are gearsets out there that can handle that. Of course, the turbocharger works well with the torque converter; a manual valvebodied 4l80e would be the bees-knees (or, a 6L80E!111!!)

geomiata
geomiata Reader
8/5/11 9:25 p.m.

viper spec t56 chevy bellhousing?

geomiata
geomiata Reader
8/5/11 9:26 p.m.

but not for challenge money.

pres589
pres589 Dork
8/6/11 12:07 a.m.

Challenge money makes me think built TH350.

cwh
cwh SuperDork
8/6/11 11:59 a.m.

OK, looking over e-bay, I see racing TH350s for 800.00 to 1200.00. Full B&M race rebuild kit for 155.00. Is rebuilding a TH350 something I could consider? No transmission experience.

MrJoshua
MrJoshua SuperDork
8/6/11 12:02 p.m.

Buy a 4l80e for ~$300 used and run it until you blow it up. Then buy another used one.

cwh
cwh SuperDork
8/6/11 12:18 p.m.

I'm concerned about the LOW first gear. Light car, 5-600ft#, low gear equals large smoke cloud and not much forward motion.

MrJoshua
MrJoshua SuperDork
8/6/11 12:20 p.m.

Isn't the 60e 3.xx first while the 80e is 2.xx?

cwh
cwh SuperDork
8/6/11 12:27 p.m.

Don't know, but that would be a lot better.

Zomby woof
Zomby woof SuperDork
8/6/11 12:59 p.m.
cwh wrote: I'm concerned about the LOW first gear. Light car, 5-600ft#, low gear equals large smoke cloud and not much forward motion.

Opposite. Low gear equals better launch. High gear equals smoke show.

Ranger50
Ranger50 Dork
8/6/11 1:09 p.m.
Zomby woof wrote:
cwh wrote: I'm concerned about the LOW first gear. Light car, 5-600ft#, low gear equals large smoke cloud and not much forward motion.
Opposite. Low gear equals better launch. High gear equals smoke show.

No, Zw. Lower gears, numerically higher, make for a greater chance of going up in smoke because you can overpower the mechanical limits of the tire against the ground. This is even greater when you lower the overall weight.

HiTempguy
HiTempguy Dork
8/6/11 2:05 p.m.
Ranger50 wrote: No, Zw. Lower gears, numerically higher, make for a greater chance of going up in smoke because you can overpower the mechanical limits of the tire against the ground. This is even greater when you lower the overall weight.

Mike has always had this idea that limiting the rotational speed of said tire on launch vs rpm somehow prevents wheelspin. I have no idea where he came up with this idea, but I've heard him preach it for 6 years

Ranger50
Ranger50 Dork
8/6/11 2:14 p.m.
HiTempguy wrote:
Ranger50 wrote: No, Zw. Lower gears, numerically higher, make for a greater chance of going up in smoke because you can overpower the mechanical limits of the tire against the ground. This is even greater when you lower the overall weight.
Mike has always had this idea that limiting the rotational speed of said tire on launch vs rpm somehow prevents wheelspin. I have no idea where he came up with this idea, but I've heard him preach it for 6 years

Oh boy.....

EDIT: IF that was the case, Powerglides would never work.

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