rts slippage !
Turbo Mini Forums

so iv finally managed to get the clutch to slip ..

this was on 15 psi boost at avon ,fast change from 3rd to 4th .and i think generally ,a bit of slippage was taking place ,, it didnt seem to kick on each gearchange .the engine is a bit more powerfull due to it being run a bit richer ,around 13.3 to 1 afr ,still too lean but now hitting 106 mph ish terminal , using the clutch formula ,this equates to 186 lb /ft holding power ,so more torque than that then ,and equating the top speed in the terminal to bhp for vehicle weight , id say over 200 bhp ....now for a bit of a change in friction and pressure.

here are some pictures of the barbecue ..







the plate was actually carbon on the inner edge ..



heres my assistant cleaning back the faces with wet and dry ,


and heres the result ..




so two different springs ,and a higher coeff to try next .

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

really robert.....

what do you expect with a 180mm plate. lol

I reckon that the slip could be down to the pressure dropping off due to the worn plate, perhaps try a few mm taken from the lugs?

joe , could be true , plates 7.35mm uncompressed ,and the old plate from years ago is 7.45 so it has lost some ... dont remember what a new turbo plate thickness is ?

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

I can measure my one for you tonight if you want?

that would be great mark , thank you .

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

She looks happy! I hope you had made sure she had done the dishes first before you gave her that job lol!

On 5th Sep, 2011 Vegard said:
I stand corrected. You should know

pretty sure mine was near enough 8mm new,

love the jaunty lampshade btw!

ive got those speakers

Hi Robert. I measured the clutch plate last night and it is 8mm exactly. I hope that helps

thats great thanks mark , looks like i had a bit of wear then .

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Slap another turbo spring plate on it and man up your left leg! Lol

Its about time you gave this engine what for...20psi + has to be done I tell the!

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1/4mile in 13.2sec @ 111 terminal on 15psi

matt....pot ?kettle ?lol

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

So what thickness springs did you have on there robert?

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

I am trying mate, I keep breaking things...im also waiting for a local RR to pop up out of no where, say in someones garden....to help map it! Lol

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1/4mile in 13.2sec @ 111 terminal on 15psi

think it was a .075 and .083 ,paul its in the ct thread .interestingly i just tested 4 .075 springs ,and got varying pressures from 210 to 380 ,thats just the cone on its own ,so thickness is not the only variable .

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

I get the impression that the "fingers" vary in strength, hence some springs have a lot more movement at the thrust bearing.

I've used two 0.94" springs in mine.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

im just building a triple spring .073 to test .

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Did you use the standard straps? Any sign of buckling?

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

stock straps , no sign of anything awry at all .

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

now tested at 188 hp and 184 lb/ft with no slip on the rr shootout .so with air flowing through the ic when racing the slipping point i estimate to be around 190 to 200 lb/ft .

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Worth trying the 190mm rally plate?

if its a higher friction joe .

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

bah,

I forgot your looking at different linings to use,

still the 190mm plate has an efective working diameter so should handle a bit more oompf asuming the same friction material.