What’s Clutch rating on stock bkd engine

cog

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Feb 6, 2008
Location
MIDDLESBROUGH... U.K
TDI
98 GT.TDI 11O
Just trying work out a turbo set up best suited for daily driving
And to stay below safe tourque limit on a probably old clutch
But no idea what sort of tourque figures these normally start to slip at
To give me an idea
 

eddie_1

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Joined
Dec 27, 2004
Location
Hannover, Germany formerly Toronto & NY
TDI
Jetta Wagon 2003 TDI tuned to 170HP, A6 Wagon 2008 TDI 2.7L tuned to 340HP
Those 4 cyl 240mm stock clutches or even 6cyl hold pretty good when new. I would say they can handle like 180hp-200hp / 320NM. But then they age faster when being put under that kind of power and then they can't handle as much, probably need to detune to below 150HP and under 250NM. Best to put a new clutch in, if you want the power. Else detune.
 

cog

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Joined
Feb 6, 2008
Location
MIDDLESBROUGH... U.K
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98 GT.TDI 11O
I bought it with a previous map on it doesn’t say what boost it’s pushing
On a va but running 184hp and just over 300ftlbs no sighn or slipping whatsoever
So with bigger turbo was thinking of just managing fueling so limited tourque and instead of peak tourque figures spread it across the band , not as much fun but less expensive than new clutch , just I’ve seen some say these good for 330ftlbs , and some even have thrown
Big gtb turbo no other mods and run 245hp and 345ftllbs , yes I think mad won’t last long
But shows seems to be a huge range of what’s a usual limit of these clutches
 

p0wer

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Jyvaskyla, Finland
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Golf 3 -94 1Z 377hp, Golf 3 Cabrio 4-Motion 1.8T 620hp, Golf 3 Syncro 2.9 VR6 HX52, Bora AJM 4-Motion 2260vk +120% Firad, Passat 3B Syncro AFN 2260vk
I had Mk5 BKD 4-Motion with maxed out 2260 and new stock DMF clutch without problems. I think figures were something around 280hp/550Nm.
 

eddie_1

Veteran Member
Joined
Dec 27, 2004
Location
Hannover, Germany formerly Toronto & NY
TDI
Jetta Wagon 2003 TDI tuned to 170HP, A6 Wagon 2008 TDI 2.7L tuned to 340HP
Sounds like the 2.0L BKD holds a lot more than what I was thinking. My comments were more regarding the 1.9L PD130 PD150 type applications. As you said, even on 240mm clutches there is a wide range of holding power based on DMF design and clamping force. My 2.7L BPP, which is also 240mm, holds 630NM 343HP with a new clucth no problem. At that power the 8year old one slipped. Then it seems always either Sachs or Luk is better for a particular application. What seems to be true though is wear is higher and higher at higher and higher power across the board. So, since I put in the new clutch I don't abuse it but know it's there when needed. This means detuning is more to do with % power reduction over new to prevent slipping and I also got the impression that below a certain threshold it is fine.
 

ryanp

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Arosa CR - 550hp - 9.7 @ 150mph 1/4 Mile, Citigo 4x4 CR TDi - 340hp, Caddy 2.0 CR 4x4 TDI - 300+hp, Golf Mk2 Van 1.9 TDI - was 290hp, Mk5 Ibiza 2.0 FR TDi - 270hp, BMW 135d - 360hp, BMW 330d - 335hp, BMW 335d - 380hp + a few more ........
we normally just fit the 1756 turbo and see how the clutch lasts, more than half of them are OK
 

eddie_1

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Joined
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Location
Hannover, Germany formerly Toronto & NY
TDI
Jetta Wagon 2003 TDI tuned to 170HP, A6 Wagon 2008 TDI 2.7L tuned to 340HP
When I did my BPP tuning I increased fueling by 5 mg/str steps...70, 75, 80, 85, 90mg/str, such that I can always go back to a working tune at lower power. The threshold on my old clutch really felt to be between 85 and 90mg/str. I found detuning to be not only about bringing up the torque slowly from low rpm, but also limiting max power. The reason was due to fast shifting and WOT-ing also at higher speed/rpm, bringing about the same sudden torque spike for the clutch. You could just do the same. Go back in steps until it is fine.
 
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