clutch and boost
Turbo Mini Forums

just wondering what guys are running to what pressure plate and what final drive.

the point is i am experiancing probs with clutch slip now on 18 psi ap ralley plate grey diaphram and 2.9 fd.

how ever i have had a seal problem which contaminated my plate a bit, i changed to the uprated seal as they didnt have any at the time the new plate went in.

how ever during a play with a carrera ( my god the hog did go on 18 psi ) but the clucth started slipping like mad in 3rdand 4th when she got hot.

so just going to see what you guys are using before i plump for a double grey, as her in doors wont be chuffed with that i dont think.

always looking for them bigger bunches of bannanas

Double grey is the easiest solution for you. Or you can make a twin-spring verto, or you can re-mortgage your house ready for when my clutch is done (damn exchange rate) :(

Look at rover P5 or P6. One of them had a clutch servo...

I had to fit a double grey. 16+psi & my single grey slipped.

WWW.TURBO-MINI.COM

for a road car i personally would steer clear from a double grey from a thrusts point of view, i'm going to give a twin spring verto a whirl.

I bought Carl's engine which had a single grey and ate the thrusts after no more than 3500 miles.

A double grey must be a nightmare!

Edited by theoneeyedlizard on 9th Mar, 2009.

In the 13's at last!.. Just

while you have the clutch out did you modd the back plate by removing 1.5mm from the 3 lugs ?

this would increase the clamping pressure somewhat!
(as per Turbo Daves original modd)

Go double grey, it's not that bad on the left leg or the thrusts. I'm suprised a single grey has lasted you this long, as you've got quite a bit of power at the moment.

How is your clutch looking dave? ready for the weekend? I want to try 30psi again

Team Racing

Clutch is on my hard drive. Which is being recvovered at a cost of $2500 so far....

cheers for response guys will have to check when i remove it soon.

i think the gearing doesnt help, putting extra load through the clutch to propell car forward in high gears, t3tone is ok on a grey at 190 bhp on his 1380 but does have a 3.2. but yes lkooks like a double grey but will look at the back plate, at the moment i only use 2 straps as i know loads on here use 3 thus requiring the extra to be taken of the back plate.

always looking for them bigger bunches of bannanas

I was going to ask this question so I may as well ask here if you don't mind? With the clutch assembled I have the straps just touching the lugs on the backplate. So I take it the TD method will give you a bit of a gap there?

what about verto clutches?? can you do anything to mod these to get a higher clamping force on the plate!!!

hoggy, me and t2clubby both only use 2 straps on ours but after taking the height off the backplate lugs we've had no problems with clutch slip. kean uses the AP rally plate with around 200lb/ft and i used a std minispares "uprated" £16 plate with 170 ft/lb.

*edit* both on single greys with 3.1fd's and up to 20psi boost.

Edited by Nick on 10th Mar, 2009.

cheers for that nic best i give that a bash then i take it it is 60 thou to take of or 1.5mm

always looking for them bigger bunches of bannanas

What height does the backplate end up at after taking the 60 thou off?

I want to find out if mine has already been done.

In the 13's at last!.. Just

we'll measure a std one tonight,

but from memory it ends up at 25. siomthing

how do you make a twin spring verto?? i tried to search it n cant find anything?

search for a thread called thread called clutch thoughts :)

Look at Roberts "Clutch thoughts" thread. Or search RTS (Robert's Twin Spring) Clutch.

EDIT: Beat me to it!

Edited by theoneeyedlizard on 11th Mar, 2009.

In the 13's at last!.. Just

Dave, is your clutch package something like the pics I sent you a couple of years ago ?

There's no point machining the lugs if it's not required. You just need to machine enough off to get the diaphragm to sit flat.

WWW.TURBO-MINI.COM

or use a file....

So it's all about the position of the diaphram spring?