TKO Feedback

Dwight · #1 (**permalink**) 08-26-2007, 06:34 AM

I have a TKO 600 (.64) 3:55, 25.25" rear tires (tire size makes a little different) a 354 ci small block 375 rwtq. 70 mph at 2000 rpms. With the torque of this stroker I can cruise at 1500 rpm in 5th and still accelerate without downshifting. Oh yea 20.8 mpg. I had a TKO but changed to the TKO 600 because of the first gear (2.87). It's is more useable on the street with my rear end and tire combo. The amount of low end torque you have makes a big different in what trannie/ gear/ tires combo you can use. My old motor had 308 rwtq and the stroker has 375 rwtq. BIG different in the way it drives on the street with the same tires and trannie. I have 5 or 6000 miles on the TKO 600 and like it. Love that 5th gear.

Dwight

Burgs · #2 (**permalink**) 08-26-2007, 07:22 AM

I've got one of those lumpy 482's that Keith puts together, 3.50 rear gears, 15" tires, and the .64 TKO600. I must admit 5th gear can buck a bit around 60mph, but from 65 up it really hits the sweet spot. From 65 to 90, (that's as far as I've ventured), the rpms hardly rise at all from slightly north of 2K. I went from a 90 mile trip on the back roads using nearly a full load of fuel, to 90 miles on the highway with half the fuel.

I did not plan on tracking the car, so I chose the overdrive.

Dwight · #3 (**permalink**) 08-26-2007, 07:46 AM

Quote:

Ain't that the truth.

I think for the most part there is no perfect tranny for all circumstances, and in reality, whichever tranny you pick, there will be some compromising, jujst depends upon what you want to compromise. Anthony

You are correct Anthony. Several guys have tried 2 or more trannies in their Cobra. I have. That is part of the fun, looking for the perfect Cobra (for me). I've changed just about everything 3 or 4 times. Got a few ideas for this winter.

Dwight

iwantacobra427 · #4 (**permalink**) 08-26-2007, 12:18 PM

331 stroker, TKO 0.64, 15" wheels, and 3.77 rear diffy.

David Kirkham · #5 (**permalink**) 08-27-2007, 10:55 AM

Anthony,

I have never had a tranny lock up and none of our customers has ever complained of it.

We race at www.millermotorsportspark.com and pit lane is perfectly flat so we don't have to chock or ebrake. They were pretty smart when they built that place.

The problem with the 0.62 over drive and freeway speeds is you run the serious risk of lugging the motor. Lugging a motor can cause the motor to detonate! Flooring the accelerator at highway speeds in a high gear is very likely to cause detonation in the engine. One of the variables that causes detonation is time. The slower the engine is turning, literally the more time there is for the engine to detonate.

Also, the RPM numbers that have been posted are not accurate for our cars with our tire set ups. (They may be accurate for other people's set ups on their cars).

We run 275-60-15 tires in the rear (28 inch diameter and 87.9 inch circumference).

With a 3.42 differential and 0.82 over drive, our RPM's at 80 miles/hour are 2694.1--or you could say 2700 RPM's. That is about perfect for highway cruising.

Lugging a motor down to 1500 RPM's and flooring on the freeway to pass some dude in a Vette is asking for long weekend in the garage pulling your motor out and finding little pieces of your rings and piston in your exhaust pipe. This is especially true in cars that lock out the advance (like we do). Centripetal advance helps to prevent the motor from detonating under these circumstances. Computer controlled fuel injected motors help to prevent detonation as well under these circumstances.

David

iwantacobra427 · #6 (**permalink**) 08-26-2007, 12:20 PM

331 stroker, TKO 0.64, 15" wheels, and 3.77 rear diffy.

dlang14 · #7 (**permalink**) 08-26-2007, 01:50 PM

I've got the TKO600, .82 OD, 3.46 rear, and 295/50 15s. I actually wish I had a little more OD. I'm up in the 2700-3000 range on the freeway most of the time. If Tremec offered a .75 OD to split the difference between the .68 and .82 I think they would have a winner.

Only other complaint was the 2-3 shift when really going for it. I just got a Steeda Tri-Ax shifter for it, so as soon as I'm done breaking my rebuilt motor in I'll give it a try and see if that fixed my issue.

patrickt · #8 (**permalink**) 08-26-2007, 02:09 PM

Quote:

Originally Posted by Burgs

I've got one of those lumpy 482's that Keith puts together, 3.50 rear gears, 15" tires, and the .64 TKO600. I must admit 5th gear can buck a bit around 60mph, but from 65 up it really hits the sweet spot...

I agree. With my torque-strong FE, 3.54 rear and .64 OD, fifth gear on the highway is a dream. The wind noise is actually louder than the pipes when cruising at 65 to 80 mph and passing is not a problem. You can't use fifth for road racing, but that's not what it's designed for. BTW, the first four gears will take you to 140, should you be so inclined. Let me tell you, being able to cruise gently and easily at 2000 RPM on the highway, and talk with your passenger, adds an additional dimension to the joy of a Cobra.

Naumoff · #9 (**permalink**) 08-26-2007, 06:40 PM

With the stoke 427 FE the CR toploader and 3.31 at parking lot speed take some getting use to but the 482 Stroker it seem just right.

It all depends on what you are going to use your car for.
The toploader can take a pounding with a Comp plus shifter.
I have driven a BDR with a TKO 500 and have to say I you can't jam it.
It takes a little finesse.
A top loader with an original shifter needs a little finesse too.