hello u all,

looking at a viper diff wile back it looked like it would be an easy swap,
so I started serching the net and I found a guy that put one in a fd with gn
powerplant,

I lost his link but I saved the pics of the forum,

I finaly started on my 3rd gen viper diff,

I am going to need u guys help on the angles so should I keep the oem angle's
on the axels or have them with no angle at full squat when launching?

also I have seen someone on the forum reinforce the conecting points of the a and control arms on the sub frame is that needed?

drive shaft shop is waiting on my dimensions for custum axles,
they will use 3rd gen viper inner joints and the shaft rated 1200hp+
& fd outer and hub rated @ 1000hp+,

I plan to run a close ratio t56 magnum transmission, I allready have the t56 conversion kit with twin spec clutch,

on the engine I plan 91mm turbo

let me know what u guys think I should beef up

here r couple pics of the diff

 

I also wanted to do this swap... Good luck and keep us informed as to how it goes.. There is another member on this forum with the viper rear. Search and you will find him.

 

Where did you get the T56 conversion kit? I've been trying to get someone to sell me an adapter plate that's milled to mate up to an REW auto-bellhousing for a minute now. . .I don't know anybody local that I'd trust to center the input shaft correctly.

 

Bewtew and howard coleman are in the process of putting a kit together to sell. I think the hold up is the wiring, trying to get the reverse lights to light up. Cause both cars are up and running with the t56.

 

I got it from a forum member that had it listed on ebay couple years ago,
thats my concern the center of the input shaft hope its set right

 

I like the Viper housing more than the Cobra housing, easier mounting. I've got the "Paul3rdGen" diff brace in my FD, I'm sure it could be adapted to either though.

How much do Viper diffs go for? I seem to find them for $1k+. Also, they're viscous not clutch type from the factory right?

 

I was lucky I got 2 of the 3d gen's brand new localy few hundred $'s each

 

Hey Tony, I guess you and Sam have something up your sleeve! Can't wait to see the finished product.

 

yep, I gaved my other diff to sam he will run the same setup on his 20b fd,
our only problem is we dont have time to breathe, + we both have a bad habbit we get to excited and start to many projects at the same time instead of start and finish one at a time,

good news is I have my good friends,
chriss green (ex porsche cup car guy) help with suspension,

victor sanches and sam will help with the engine tricks,

and steve kan will help me with the 91mm turbo feeding a smaller turbo set up
hope to have it ready early next year

I think we make a good team

 

I hear you, I think quite a few of us do that. That's another project I would like to see running, Sam's 20B. You do have a good team.

 

here's a good deal on ebay

http://cgi.ebay.com/ebaymotors/08-09...Q5fAccessories

 

Is there a lot of fabrication involved to put one of these in an FD?

 

I have guy in waxahachi that charges around $200 to cut end weld everything in place (diff and cross member),

next u need the axles u can modify cheap turbo 2 axels, or u can go driveshaft shop $2k
and next u need to modify the driveshaft couple hundred $,

and u need the ring and pinion few hundred bucks installed 4.10 or higher ratio

I will post the picks from the guy that used t2 axels if I can find them later

 

here r the pics this one used gen 2 viper diff

 

Thanks for the info Tony, looks good. Looking forward to see you running with the new set up.

 

For those more on a budget the Ford Explorer IRS diffs are around $400 and have 3:73s with a clutch pack style LSD already in them. Also all aluminum.

The Viper diff however has been 7.90's with upgraded LSD in 1400rwhp twin turbo Vipers. They are stout.

 

7.5s is the record for now,
crazy on full weight and dr's

http://www.dragzine.com/news/99-dodg...ials-with-irs/