mistafosta

iTrader: (9)

Lockup will mean zero slip, yeah that will help. But again it won't get you past the ratios. Only eliminate the slip.

s57_s2k

how come the calculation for 3.54 gear equal the one for 3.36 gear ?

oscs

iTrader: (19)

Yup, I was inputting the data wrong.

mistafosta

iTrader: (9)

http://www.catherineandken.co.uk/sti/tyres.html is usually what I use. Just plug in 1:1 for one of the ratios and 275/60/15 for tire size. It's not as comprehensive but it seems to be way more accurate lol.

oscs

iTrader: (19)

165 isnt going to cut it for me. So GM doesn't make a 4spd auto that can hold this kind of power?

mistafosta

iTrader: (9)

I don't think anyone makes an overdrive auto that will hold 1khp in OD

oscs

iTrader: (19)

What I need is a true 4spd auto with a "5th gear OD"

RonA

iTrader: (1)

That 47rh is looking better and better. :-)

Mongoose350

iTrader: (1)

Give NTX Coverter a call. I spoke with them once about an 80e. There super cool and will explain everything, and will build you somthing for whatever you need. Price might be more than you want to spend, but they will at least help you figure out if what you want is possible.

rotary1307cc

iTrader: (5)

8.8/9" IRS swap is the most logical step here. You get strength with a bunch of gear choices. For not that much money

Better if to cut the losses now with the r200

stevieturbo

What most auto guys do and what Z says, you need a taller diff.

Most fast auto guys end up in the 2.x range for a final drive to give them some top end ability

AFAIK you can get an 8.8 down to around 3.08, although the gears dont seem that common. Viper rear would be 3.08 too.

oscs

iTrader: (19)

I ran across a thread last night where a guy married a 2.94 Nissan Armada R&P set with a R230 300ZXTT diff. Those diffs are massive @ 9.05". At this point there is nothing else I can do minus tearing everything out and either back halving the car or trying to engineer an 8.8 setup.. Looks like I'm going Armada/300ZX diff shopping today.

rotary1307cc

iTrader: (5)

8.8 gears are everywhere. Easy as cake to get 3.08 or 2.73. I have a set of both just sitting here

Forcefed86

iTrader: (4)

You have to put it all into perspective. You are racing 300k+ super cars. 10k worth of trans. parts is a drop in the bucket to those guys. You can’t expect budget parts to hold up to 1300whp reliably.

I’ve seen used aftermarket case glides for $1500 or less quite a few times. Same with GV units. Ebay usually has a few. If you’re on a budget, you need to look to used stuff and learn how to go through it/rebuild it. The glide is by far the easiest auto trans to work on that will hold up at 1300whp. If you don’t’ want to redo the rear, the glide/GV unit is the cheapest option that can handle 2k worth of power. Also if your doing roll racing, you may get away with a stock case for a few years. I paid $700 for my stock case glide with all the goodies. 3 years of T-brake launches... so far so good.

The GV unit on a glide is no longer than a standard TH400… A .78 final gear would give you some healthy top end, even with the 3.54's.

https://gearsplitter.wordpress.com/2...ur-powerglide/

oscs

iTrader: (19)

Switching to an 8.8 is not anywhere as easy as it sounds, Do able but not easy. Not to mention the cost and i would have to try and sell all this stuff. It would be a massive undertaking at the moment.

oscs

iTrader: (19)

I want this more and more.. If i could find a used GV for $1500 or so i would do it in a heart beat. I am defiently capable of building up a glide i just need to do some research and look around for used ****. Where are you finding these deals in used stuff?

Also is the GV unit on the back of a "shorty" glide? that looks like it would fit the tunnel nicely, If not i would make it fit.

stevieturbo

Once it's done, it's done. Look long term if you're really that worried about the existing one breaking.

or just take a chance and keep running the existing setup

oscs

iTrader: (19)

So the big lure to the GV unit is that you can actually use the OD at WOT where the 4L80E OD is basically useless for anything other than cruising.

stevieturbo

Why not speak to someone at RPM etc ? There are bound to be some guys with good power with the 4l80 ?

oscs

iTrader: (19)

Ive talked to FTI, and jake. They both think the same thing, Glide for track 4L80 for a mix or "roll racing." Regardless of glide vs 80E i will always be at the mercy of my rear gear.

Using a 4L80E with my 3:54 gear will net me the same speeds as the glide. Not being able to go WOT in OD with 80E pushes me away. besides being able to "cruise" whats the point of it?

Now a glide with an OD i can actually hammer on is the answer for me.. I keep my rear end intact, I get a great low gear out of the hole, I minimize shifts ans I still get to use all that power up top and i can cruise the car.. WINNING!