Home 
> Jensen Healey & Jensen GT Tech > Engine & Transmission > Borg & Beck Pressure Plate

 Moderated by: Greg Fletcher  
AuthorPost
malcolm
Guest
 

Joined: 
Location:  
Posts: 
Status: 
Offline
Does any one have information on Borg & Beck pressure plates.ie. serial nos and torque rating.

If the torgue rating is too low is it possible to modify the existing pressure plate

Judson Manning
Member


Joined: 03-14-2005
Location: Atlanta, Georgia USA
Posts: 406
Status: 
Offline
Malcolm,

At 8-1/2" the JH clutch-plate is marginal for any high performance 9xx engine.  However, it's more than adequate for a street car.  If you are in need of something stronger, the later Esprits and Excels used a 9-1/2" clutch (I think) from the Toyota Supra.

It wouldn't take much to machine your JH flywheel to accept the Toyota pressure-plate.  The Toyota clutch-plate would be a natural fit if using the W58 transmission.  Alternatively, companies like http://www.clutchnet.com can fabricate a custom plate for you.

Judson

malcolm
Guest
 

Joined: 
Location:  
Posts: 
Status: 
Offline
The pressure plate that I think I have is that provided is for a lotus Excel

 

Harkes
Member


Joined: 03-17-2005
Location: Warmond, Netherlands
Posts: 194
Status: 
Offline
Hi Malcolm,

I have the toyota supra 5sp gbox that came with the Lotus Excel including bellhousing. My new 907 (hybrid actually) engine is now equipped with the later leight weight steel flywheel and therefore I was looking for a 9.5" clutch and a 9.5" pressure plate.

I know you are looking for a Borg & Beck... i believe Conversion Components sells the 8.5" pressure plates and from pictures i could tell they are from Borg & Beck. Ask for Colin, he can give you all the details.

i have made some pictures of the Borg & Beck I ordered one day but which didn't fit my esprit flywheel... you can easily see the torque rating of it.  It can be found on the http://www.jhppg.com . Go to the netherlands section (old zealand :)  if you will) and then find the blue JH. You will find a special section containing pressure plates

I finally ended up purchasing a true 9.5" pressure plate from Valeo for Lotus Esprit (buy them from Lotus and you pay 3 times as much!!)

good luck

Erik Harkes 

Last edited on 02-20-2007 02:32 pm by Harkes

malcolm
Guest
 

Joined: 
Location:  
Posts: 
Status: 
Offline
Harkes,

I had a look (but I am myopic) and could not see anything

Harkes
Member


Joined: 03-17-2005
Location: Warmond, Netherlands
Posts: 194
Status: 
Offline
Hi Malcolm

no worries. Here's the link

http://jhppg.com/gallery/Clucth-Pressure-plate/Gearbox_conversion_049?full=1

Torque rating of my Delphi Borg & Beck pressure plate was: 6250

Diameter was ok for my esprit flywheel but the holes & dowels didn't line up. I ended up with a Valeo one which by the way has a higher torque rating (7000 something like that)
By the way, you'll see a sticker with Sachs on it as well, that is because Sachs bought (took over) Delphi Borg & Beck

hope this helps
Erik

Last edited on 02-21-2007 08:12 am by Harkes

malcolm
Guest
 

Joined: 
Location:  
Posts: 
Status: 
Offline
Harkes

Excuse my ignorance this number you talk of is it a dimensionless number or can be rated back to the torgue rating of the motor

regards

Malcolm

Harkes
Member


Joined: 03-17-2005
Location: Warmond, Netherlands
Posts: 194
Status: 
Offline
it can/should be rated back to the TORQUE rating of your engine.

there is a rather technical formula for this:

http://www.advancedclutch.com/proveit/clutch101/clutch101-torque.asp

But lotus engine experts such as Gary Kemp and others know almost exactly what amount of clamp force (torque) is necessary for your engine spec.

hope this is of help

malcolm
Guest
 

Joined: 
Location:  
Posts: 
Status: 
Offline
 

Harkes

Thanks,

Malcolm



UltraBB 1.172 Copyright © 2007-2011 Data 1 Systems