Flywheel identification

Gearboxes, clutches, diffs, wheels & tyres....
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ian65
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Flywheel identification

Post by ian65 » Sun May 15, 2011 9:54 pm

There were 3 different types of flywheel fitted to UK 1st gens ( plus 1 more fitted to US spec GSL-SE)

The flywheels are identified by a number on the rear face ( the side facing the engine) this picture shows the number 318, this being a GSL-SE fly...


Image


The following picture is a series 1 flywheel.... (no identifying number on S1 flywheels and they weigh 30 lbs)


Clutch side...

Image


engine side...

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see how heavy it looks....

Image




This is a series 2 fly ( number 21 on the back and weighs 23lbs)...

Clutch side...


Image


engine side...

Image


looks much more lightweight...

Image


The series 3 fly has the number 31 on the back and weighs 26lbs....

Clutch side...


Image

Engine side...

Image

NOTE

A quick note on clutch sizes....

2 different size clutches were fitted to UK 1st gens:

series 1 / series 2 cars were fitted with a 215mm clutch

series 3 cars were fitted with a 225mm clutch


The 225mm clutch will only fit the series 3 flywheel.

New 215mm clutches can be bought off ebay for upwards of £20 and average around £35.
225mm clutches are much, much more expensive.
.
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DB RX63
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Re: Flywheel identification

Post by DB RX63 » Tue Feb 09, 2016 8:22 pm

I know you did this excellent post a while back Ian, so I wonder if you know if the S2 and S3 flywheel have a different overall diameter ?

I'm thinking starter motor fitment here. I'm sure I have an S3 flywheel because the clutch is 225mm, what I am not certain of is if the starter that I have is S3.

It's important as I am having a 2.0Kw denso starter built and I don't want to get it wrong.........

DB
Met Blue Series 2 Elford Turbo
S3 Rally Car (under Construction - Still !)

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ian65
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Re: Flywheel identification

Post by ian65 » Tue Feb 09, 2016 8:38 pm

sorry Derek, I don't know, I can't even remember posting this.

TOOL
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Re: Flywheel identification

Post by TOOL » Tue Feb 09, 2016 9:59 pm

Derek,

The overall flywheel diameter is the same for all the non-turbo flywheels.

See here: http://www.racingbeat.com/RX7-1975-1985 ... 11436.html
Back in sunny France

DB RX63
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Re: Flywheel identification

Post by DB RX63 » Tue Feb 09, 2016 10:05 pm

Brill,

Thanks Andy, I should have checked that first.......
Met Blue Series 2 Elford Turbo
S3 Rally Car (under Construction - Still !)

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DKWW2000
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Re: Flywheel identification

Post by DKWW2000 » Wed Feb 10, 2016 9:33 am

I went down this path recently, this thread might shed some light:-

http://www.rx7fb.com/viewtopic.php?f=19&t=3053

I have also checked the various ones for sale that have been re-manufactured on Ebay USA & they show that they replace both the Mitsubishi M3T 26081 & 36081?

I am guessing both will fit. but the smaller cog will turn the engine slightly faster?
RX7 FB S3 - RX7 FC TII Vert
Rotaries Previously Owned:-
2 x NSU Ro 80s - 2 x S2 RX7s - Suzuki RE 5 - DKW(Hercules) W2000 - Norton (Krauser) Commander

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DKWW2000
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Joined: Sun Jul 06, 2014 10:16 pm
Location: English Riviera - South Devon

Re: Flywheel identification

Post by DKWW2000 » Sun Feb 14, 2016 11:01 am

Found this one that shows all different part numbers with 11 tooth cog:-

http://www.ebay.co.uk/itm/271293404951? ... EBIDX%3AIT
RX7 FB S3 - RX7 FC TII Vert
Rotaries Previously Owned:-
2 x NSU Ro 80s - 2 x S2 RX7s - Suzuki RE 5 - DKW(Hercules) W2000 - Norton (Krauser) Commander

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