DanZ28

iTrader: (5)

Anyone drag racing a setup like this? I really like the idea of having 6 gears, especially an extra gear between 2nd and 3rd gear for the track. They are supposed to be good to 1300 hp as well. Any opinions or people using them?

Dan

NA$TY-TA

iTrader: (21)

If you do get it i wouldnt use it to split 2 and 3rd at the track......
I know a few people running them and i might get one myself one of these days....
The big dog unit is rated at 2500hp......
Most people i know of are street rod cars loking for overdrive.....

DanZ28

iTrader: (5)

Gear venders said it could help alot betwen those two gears since that is typically where the car drops off alot. It splits all the gears if you choose since it's a 6 speed. Why wouldn't you use it to split the 2nd and 3rd gears? I need to do more research .

Dan

gator's 99TA

iTrader: (2)

you must enjoy 35-40% driveline loss then......

DanZ28

iTrader: (5)

Why would I enjoy that? If it's a bad idea to use it just say it's bad ,and while your typing feel free to share some of your knowledge on it..

gator's 99TA

iTrader: (2)

dont take it as attitude. just wanted to give you an opinion. the GVOD is not popular b/c it eats up so much pwer it is literarlly another transmission that sits in line with your th400. it will help out on highway rpm and help slightly with fuel milage but will eat up another 10-12% of driveline loss.

FormulaFire

iTrader: (20)

It also adds a good bit of weight.

DanZ28

iTrader: (5)

Thanks for the info, thats what I was looking for. I figured there would be some loss, just didn't know if the addition of the extra gears would overcome the loss in drivetrain and weight. I'll save my money and add it to my twin turbo fund .

Dan

tektrans

iTrader: (23)

Yeah it's a great concept but not if it's gonna rob power. Shoot, you might as well go with taller gears if you want more rpms for the highway, it'll slow you down just as good as the gear vendors but it'll be cheaper.
Gator- 10-12% of what? If you're making BIG power would that % go down?
He's talking twin turbo, would his driveline loss % be lower if he's making 1000 rwhp as compared to myself making 466 rwhp?

69rat

the GV with adapter weighs about 40 lbs and depending on the vehicle, to install it you have to cut out a big chunk of the trans tunnel. they do keep the rpm's in the sweet spot though.

cablebandit

iTrader: (37)

4l80e....why does this get skipped in consideration

DanZ28

iTrader: (5)

Because I already have a TH400 . In the fitment department for the GVOD, it looks like the TA would be the biggest hassle.

JL ws-6

iTrader: (50)

I wouldn't put it in there. I have a th400, a converter that flashes to 6000 and 4.10's and I still drive my car around on the street. I'm not driving it across the country or anything like that, but it's still drivable.

I will be tightening the converter up this year though when the bottle goes on, I think it's gonna need that to run right, and that will probably make it run even better on the street, possibly a swap to 3.73 gears too if I'm running out at the track, but only if it's running out at the track... I spin my motor to 7500 so with the converter tighter I don't think it will be a problem.

cablebandit

iTrader: (37)

why a turbo 400? For your power level, rossler coulda built you a 4l60e with a tbrake

DanZ28

iTrader: (5)

I drive my car every so often on the street (very rarely), and on the free way with 4.10's, 28" tires and 4800 stall it sucks at 3350 rpm's at 65 mph. However whaen I put the turbo's on, I will probably go to a 3.23 or 3.42 gear and a tighter stall.

DanZ28

iTrader: (5)

After a blew up my built 4l60E, I went with the TH400. My car is a track car mostly and the TH400 made a huge difference over my 4l60e at the track.

gator's 99TA

iTrader: (2)

a looser converter shouldnt change your highway rpms much if at all. its that 1/1 gear and 4.10 that hurt. i run a 3.73 and 28 radial so it isnt really that bad IMO

NA$TY-TA

iTrader: (21)

And the 3.54's and 28's i run are even better.........

Phate

iTrader: (2)

There is no cutting required on the Camaro...not sure about a Firebird, but I am pretty sure it wouldn't require any cutting.

Where is this information coming from? From the GV site..."The GEAR VENDORS uses a common vertex (cone) Raybestos clutch system. This means there is no parasitic loss through dragging and unapplied clutch pack. For this reason the GEAR VENDORS is the most efficient transmission on the market using less than 1 horsepower per 400. Imagine - we race the Dakar. Tunisian, and Master rallies (over 6,000 miles each race) with just 27 ounces of fluid in the unit. And, we have won both the Tunisian and the Master. You cannot do that if you are converting hp to heat."

I believe that a lot of racers don't run them because they are prohibited in a lot of classes and they are fairly expensive @ $2500.

Regardless, it is an awesome piece and it works well splitting automatically when you have the speedo signal wired into it. I should have some numbers with my big front mount setup in the next few months with this unit.

I made 680ish to the wheels on the old twins with a pig rich tune on 14-16psi (was a couple of years ago and I had to get off the dyno for another car that had an appointment). Using the math supplied here that would mean that I was making ~900hp at the flywheel. Probably not, since I the heads on the combo are underperforming and it had a small cam in it at the time.

Anyone have before and after dynos who actually HAS one?

NA$TY-TA

iTrader: (21)

The $2500 price includes there driveshaft........ most dont need it.... so really its closer to $2k......
I never said i wouldnt use one.... i looked into it...... i just said i wouldnt split gears with it in drag racing....