Who has a 7 SPEED DCT box in their supra?

[AC93]

Hmmm I'm sure some PC wizadry could make it work with Links or Syvecs

[el_bandido]

Hmmm I'm sure some PC wizadry could make it work with Links or Syvecs

 

Syvecs are the problem which led to SRD moving to a MOTEC on the IS-F. They don't allow custom firmware, so someone at Syvecs has to program the gearbox for you, and only if they want to. You need an ECU with an open protocol.

[scott.wild]

The ZF8hp is used in just about everything at the moment.

 

Just to give you some idea as to why the 8 speed is a vastly better choice than the 7 speed DCT, here is the speed to gear spread on a few options:

 

M3 DCT with Whifbitz custom diff vs NA6 diff and ZF8hp

https://jza80.mkivsupra.net/imports/2018/10/1.png

 

M3 DCT with Whifbitz custom diff vs TT6 diff and ZF8hp

https://jza80.mkivsupra.net/imports/2018/10/2.png

 

M3 DCT with Whifbitz custom diff vs NA6 diff and IS-F gearbox

https://jza80.mkivsupra.net/imports/2018/10/3.png

 

More aggressive through the gears and a higher top speed/lower cruising RPM. Not only will it be faster, it won't cost you so much petrol on a motorway run.

 

Interesting numbers, I was auto and went with the 3.2 rear, would be good to see how the M4 DCT gear ratios stack up and I believe there is little to no tunnel work needed to make it fit.

[el_bandido]

I'm not sure what the ratios are for the M4, I'll see what I can find and plug the numbers in.

[phobos]

I'm not sure what the ratios are for the M4, I'll see what I can find and plug the numbers in.

 

Here you go. Ratios for the F8x M3/M4 are much better. I actually have the box waiting here for Paul to complete the adaption work

 

 

Edited October 13, 2018 by phobos (see edit history)