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Author Topic: Clutch tech  (Read 124737 times)
Typ3racing
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Posts: 41



« Reply #150 on: September 03, 2013, 16:55:10 pm »

Yesterday i pulled engine and tranny out.
This is what the clutch looks like

[ Attachment: You are not allowed to view attachments ]

Got funny colours but almost no wear (0,1mm each disc)

i dont think this is really bad for  about 60 runs and some street driving.

[ Attachment: You are not allowed to view attachments ]

Lets see what another 100 horses will do with the clutch at DDD
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MeXX
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World record holder 8.733 @ 255.658


« Reply #151 on: September 03, 2013, 18:19:01 pm »

Yesterday i pulled engine and tranny out.
This is what the clutch looks like

Got funny colours but almost no wear (0,1mm each disc)
i dont think this is really bad for  about 60 runs and some street driving.
Lets see what another 100 horses will do with the clutch at DDD

Sevas Uwe

Looks like your clutch and clutch management works pretty fine.
What about the floaters do they have wear and what about wrapping?
Did you measure how flat they stay?

keep on clutchin'

MeXX
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Drag or Die
Typ3racing
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« Reply #152 on: September 03, 2013, 19:28:23 pm »

the floater, pressure plate and flywheel have worn less then a tenth.

And still are pretty straight.

After i got used to it, the clutch management is working fine. Grin Grin Grin

So i will put it all together again when the engine is ready (you remind the Cosworth parts?)
and then off to DDD11 to run a few 10s passes.

« Last Edit: September 03, 2013, 19:30:29 pm by Typ3racing » Logged
MeXX
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« Reply #153 on: September 03, 2013, 19:30:25 pm »

So i will put it all together again when the engine is ready (you remind the Cosworth parts?)
and then off to DDD11 to run a few 10s passes.



Hi

Lookin' forward hearing your new engine rumble..... Grin

MeXX
« Last Edit: September 04, 2013, 13:44:07 pm by MeXX » Logged

Drag or Die
richie
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« Reply #154 on: September 17, 2013, 18:37:54 pm »

After a years abuse the floater finally gave up Shocked this might explain why I was having difficulty adjusting the clutch slip, it would either bog or slip to much, the discs are still ok and the cover will get a tiny amount removed from resurfacing, flywheel is good so I just got to put a new floater in there, no exotic parts here though Wink

cheers Richie
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Cars are supposed to be driven, not just talked about!!!   


Good parts might be expensive but good advice is priceless Wink
Airspeed
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« Reply #155 on: September 20, 2013, 07:47:03 am »

What disks are those Richie?
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"...these cars were preferred by the racers because the strut front suspension results in far superior handling than the regular torsion bar front end..."  - Keith Seume.
10.58 @ 130 mph (2/9/2022 Santa Pod)
richie
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« Reply #156 on: September 20, 2013, 08:36:10 am »

What disks are those Richie?

Kennedy's

cheers Richie
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Cars are supposed to be driven, not just talked about!!!   


Good parts might be expensive but good advice is priceless Wink
Airspeed
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« Reply #157 on: September 20, 2013, 09:27:52 am »

Thats indeed not very exotic  Grin

Amazing you broke off a tab from the floater plate. The other tabs look not too happy either  Cool
Good thing you caught it on time.
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"...these cars were preferred by the racers because the strut front suspension results in far superior handling than the regular torsion bar front end..."  - Keith Seume.
10.58 @ 130 mph (2/9/2022 Santa Pod)
MeXX
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World record holder 8.733 @ 255.658


« Reply #158 on: September 23, 2013, 13:30:33 pm »

Amazing you broke off a tab from the floater plate. The other tabs look not too happy either  Cool
Good thing you caught it on time.

Looks like a am happy to have 12 tabs  Grin Grin

MeXX
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Drag or Die
Typ3racing
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« Reply #159 on: September 29, 2013, 19:20:54 pm »

At DDD the launch was working fine.

In this video you can see how fine the system works off the line:

www.youtube.com/embed/QMTsy5joZyo

Every 60ft below 1.6 (faster than Mexx running N/A)

Not too bad for 2600lbs at the tree  Tongue

And btw: Car was still running on sunday  Grin
« Last Edit: September 29, 2013, 19:24:52 pm by Typ3racing » Logged
Turbo_Rich
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« Reply #160 on: February 03, 2014, 13:08:48 pm »

Thought I'd post up my findings after recently pulling the engine from my bug. My setup is very basic. A custom flywheel to mate the type 4 to a Porsche 915 gearbox thus utilising the 911 clutch. I am running a Helix sprung cerametallic 4 puck clutch an a standard 911 cover plate. This has been in the car since about 2008. The car puts out about 270ft/lbs torque at the wheels and I've not had trouble with the clutch slipping apart from trying to launch in 2nd and when it got oil contaminated.

Anyway just want to post some pics up. My fear now is there may be a hairline crack in the mounting flange in the flywheel which will mean a new one so looking at options and opinions.




The friction plate had obviously got a bit hot and is now down to the rivets as well as the faces starting to break up!




Worst bit is the flywheel this shows heat distortion, crazing and some scoring. I've also noticed what appears to be a hair line crack round the mounting flange!



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Frallan
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« Reply #161 on: February 03, 2014, 16:58:09 pm »





Built out of Swedish steel 2541-3 which is very similar to 300M.
Let me know if you are interested. I will most likley not use it.
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Turbo_Rich
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« Reply #162 on: February 04, 2014, 19:00:47 pm »

Thanks Frallan. I'm waiting for the results of the crack test. Let me know what you would want for it.

I spoke to Helix about the clutch plate and they can re-pad this for a reasonable price so this is good news.  Smiley
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MeXX
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« Reply #163 on: February 04, 2014, 22:07:06 pm »

I'm waiting for the results of the crack test.

Hi

This cracks are typical for excessive heat that can't be handled by the casted material.

MeXX
« Last Edit: February 04, 2014, 22:14:28 pm by MeXX » Logged

Drag or Die
Turbo_Rich
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« Reply #164 on: February 05, 2014, 23:44:58 pm »

Thanks, I've shown it to a few people now any they weren't bothered and have seen worse, so that's reassuring. The bit I'm concerned with is a hair line crack round the mounting flange. Don't want that shearing off!
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MeXX
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World record holder 8.733 @ 255.658


« Reply #165 on: February 06, 2014, 08:24:58 am »

Thanks, I've shown it to a few people now any they weren't bothered and have seen worse, so that's reassuring. The bit I'm concerned with is a hair line crack round the mounting flange. Don't want that shearing off!

Hi

I would say pretty the same. I have see much worse cracks on my one pressure pates. If you can grind it flat without removing excessive material you can still use it on street. If you do a lot high horsepower launches where the clutch has to take an enormous amount of heat
and you should step up to a all steel solution, anyway.

BTW Launching in 2nd gear is much more heat for the clutch.

So keep on clutching

MeXX
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Drag or Die
Airspeed
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« Reply #166 on: February 06, 2014, 08:59:35 am »

I can't see the crack around the mounting flange you refer to Richard, but I do see you're using stock type 4 flywheel bolts?
Maybe the flywheel moved a little during launch and that might have caused the crack there?
Upgraded, shanked, reamed-to-fit 12.9 bolts, torqued a little more then stock will go a (very) long way preventing this, even on a cast flywheel, is my personal experience at least.
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"...these cars were preferred by the racers because the strut front suspension results in far superior handling than the regular torsion bar front end..."  - Keith Seume.
10.58 @ 130 mph (2/9/2022 Santa Pod)
Frallan
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« Reply #167 on: February 07, 2014, 13:02:05 pm »

Ben Crisp at TTV will build very nice flywheels.
He did one for me few years ago and it was more or less custombuilt.

If anyone else wish to go this route, maybe you can get a better price?

info@ttvracing.com

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Turbo_Rich
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« Reply #168 on: February 11, 2014, 01:16:51 am »

Managed to pickup the flywheel last week and unfortunately it was confirmed that there was a hairline crack round the mounting flange. Glad I spotted that now and not once the clutch had exited the gearbox! So I have started hunting around for a new one and have a few leads. However I am wondering whether it is time to upgrade to a twin disc to try and dissipate some of the heat build up I am seeing. Any thoughts on this as the last one has been good so far with no clutch management but moving on I'm looking at adding this and think with some more clutch slip in the launch it may be bit much for the current setup

Pic of the crack!

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MeXX
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World record holder 8.733 @ 255.658


« Reply #169 on: April 22, 2014, 08:26:35 am »

Hi

Here comes another update from my clutch:
Yesterday I pulled my engine to check the clutch, there 57 launches but only a few with nitrous on the parts:
[ Attachment: You are not allowed to view attachments ]
Clutch disc still smooth and shiny 6.31mm thick (appr. 0.15mm wear)


[ Attachment: You are not allowed to view attachments ]
still fairly flat and didn't wrap at all


[ Attachment: You are not allowed to view attachments ]
pressure plate wear plates are softer and therefore there is more wear on them


[ Attachment: You are not allowed to view attachments ]
maximum wear of the wear plates is 0.35mm per side.

Total wear of the clutch after 57 launches is about 0.8mm and it's still usable and as the clutch disc shows only 0.15mm wear I will only change the wear plates next time.

So long

MeXX
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Drag or Die
Airspeed
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Posts: 593



« Reply #170 on: April 22, 2014, 08:30:25 am »

How much does your Ghia weigh Mexx?
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"...these cars were preferred by the racers because the strut front suspension results in far superior handling than the regular torsion bar front end..."  - Keith Seume.
10.58 @ 130 mph (2/9/2022 Santa Pod)
MeXX
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Posts: 526


World record holder 8.733 @ 255.658


« Reply #171 on: April 22, 2014, 08:40:42 am »

How much does your Ghia weigh Mexx?

Dear Walter

My car weights right at the tree with diver fuel and a full nitrous bottle Grin Grin

So light

MeXX
« Last Edit: April 22, 2014, 09:36:19 am by MeXX » Logged

Drag or Die
Airspeed
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« Reply #172 on: April 22, 2014, 09:19:40 am »

Thanks! Thats very light indeed. Great job!
I think total weight makes a difference in how a clutch 'survives'.
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"...these cars were preferred by the racers because the strut front suspension results in far superior handling than the regular torsion bar front end..."  - Keith Seume.
10.58 @ 130 mph (2/9/2022 Santa Pod)
MeXX
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Posts: 526


World record holder 8.733 @ 255.658


« Reply #173 on: July 08, 2014, 12:18:15 pm »

Hi

Here comes another update from my clutch:
The last time I pulled my engine to check the clutch, there were 85 launches the last 20 with nitrous on the parts:

[ Attachment: You are not allowed to view attachments ]

Clutch disc still smooth and shiny 6.28mm thick (appr. 0.18mm wear)


[ Attachment: You are not allowed to view attachments ]


still fairly flat and didn't wrap at all


[ Attachment: You are not allowed to view attachments ]

flywheel wear plates are softer and therefore there is more wear on them


[ Attachment: You are not allowed to view attachments ]

pressure plate wear plates are softer and therefore there is more wear on them

maximum wear of the wear plates is 0.38mm per side.

Total wear of the clutch after 85 launches is still beyond 1mm and it's still usable and as the clutch disc shows only 0.18mm wear I will only change the wear plates next time.

So long

MeXX
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Drag or Die
MeXX
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World record holder 8.733 @ 255.658


« Reply #174 on: August 12, 2014, 08:12:39 am »

Hi

Just returned  from NitrOlympX.

Here is another update from my clutch:
I have done another 5 launches on Nitrous;
As the 60 ft has to come down the nitrous level at the tree has to go up  Grin


[ Attachment: You are not allowed to view attachments ]

[ Attachment: You are not allowed to view attachments ]

[ Attachment: You are not allowed to view attachments ]

[ Attachment: You are not allowed to view attachments ]

MeXX
« Last Edit: August 12, 2014, 08:18:53 am by MeXX » Logged

Drag or Die
Bad bug
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« Reply #175 on: December 05, 2015, 18:56:50 pm »

Found a pic of my latest set-up which holded 465hp (I launch soft I must admit, but car is very heavy):


Do you have to use a tilton hydraulic clutch release with this setup.
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Airspeed
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« Reply #176 on: December 05, 2015, 23:02:36 pm »

No.
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"...these cars were preferred by the racers because the strut front suspension results in far superior handling than the regular torsion bar front end..."  - Keith Seume.
10.58 @ 130 mph (2/9/2022 Santa Pod)
Erlend / bug66
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« Reply #177 on: April 19, 2016, 07:03:44 am »

A little easier than adjusting a REV6... Smiley

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The '67:
10.626 @ 132mph, SCC 2016
10.407 @ 134mph, SCC 2017
10.221 @ 135mph, SCC 2018

The '59:
Not yet..
Silversoar
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WWW
« Reply #178 on: April 19, 2016, 19:31:23 pm »

Erlend,

What parts have you used on your setup?
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Erlend / bug66
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« Reply #179 on: April 19, 2016, 21:21:19 pm »

Erlend,

What parts have you used on your setup?


I'll send you an PM Smiley
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The '67:
10.626 @ 132mph, SCC 2016
10.407 @ 134mph, SCC 2017
10.221 @ 135mph, SCC 2018

The '59:
Not yet..
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