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3.3 black pressure plate


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#1 rotabox

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Posted 19 March 2020 - 01:19 PM

hi all

is there a pressure plate that will bolt to a std 3.3 black injection flywheel the light weight one that will fit inside a red bell housing for a M20 with a rat trap clutch linkage

Cheers Sean



#2 yel327

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Posted 19 March 2020 - 01:45 PM

All injected 3.3 were Trimatic. But from memory the carby black 3.3 flywheel has the dowel so should fit? From memory these all used the bigger clutch plate and the holes for the pressure plate are further out. But a red 6 flywheel should fit if you drill the dowel hole, or remove the dowel. Someone like Dr Terry will probably know for certain.

#3 rodomo

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Posted 19 March 2020 - 10:18 PM

Black flywheel have a different (bigger) pressure plate that probably wont fit in a red bellhousing.



#4 rodomo

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Posted 19 March 2020 - 10:48 PM

Found it http://www.gmh-toran...g-clutch-parts/
Also this:

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#5 mervx

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Posted 20 March 2020 - 10:58 AM

Good info . What about Blue flywheel/clutch assy into a Red bellhousing? its been a while since I played with theses bits!!  Cheers.



#6 yel327

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Posted 20 March 2020 - 11:16 AM

Depends on what red bellhousing I think. From mid 1978 they were full cable clutch so it should be OK with those. Earlier ones may have an issue, in which case just use a red flywheel unless you are using the original EST off carby black 3.3.

#7 claysummers

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Posted 20 March 2020 - 05:16 PM

If you’re fitting a red flywheel to a blue or black crank you probably want to get it lightened,no? Blue and black cranks being fully counterweighted, are substantially heavier than red I believe.


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#8 yel327

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Posted 20 March 2020 - 05:21 PM

I think the flywheels are larger but they are not externally balanced from memory. If you were building a performance engine you’d balance it all, but if we are talking a relative stocker surely it’d be fine.

#9 rotabox

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Posted 25 March 2020 - 09:50 AM

Thanks Guys I will have to rethink my plan

Cheers Sean



#10 claysummers

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Posted 25 March 2020 - 10:04 AM

Thinking back I ran an m20 rat trap behind 3.3 blue with red flywheel about 1996 with no issues. A long time ago and only did about 200km to test the motor before rebuilding the bottom end and fitting a trimatic.


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#11 rodomo

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Posted 25 March 2020 - 08:59 PM

Found it http://www.gmh-toran...g-clutch-parts/
Also this:

You'll see in this pic that the holes are further apart. This means the PRESSURE PLATE is bigger and goes further back into the bellhousing.

This is where the problem lies.

#12 claysummers

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Posted 25 March 2020 - 09:27 PM

Can’t see a pic Rob


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You mean the one in post #4?


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#13 rodomo

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Posted 26 March 2020 - 10:34 AM

:spoton:

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#14 rodomo

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Posted 26 March 2020 - 08:56 PM

So I had the research and development team do some work on this today.

 

They found an old race motor with a blue clutch still attached.

 

They bolted a red bellhousing on, there were problems with the bolts bottoming out, but here are their results.

 

The blue clutch won't fit in a red motor bellhousing as it is too big.

 

Here are some pics, the R&D team also found out that red and blue/black bellhousing bolts are different lengths. I tried to get pics but the flash didn't show the scraping.

 

 

 

 

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