fly wheel weight

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TONYSPRINTER

fly wheel weight

#1 Post by TONYSPRINTER »

can anyone tell me how heavy a sprint/1850 fly wheel should weigh thanks :?
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TONYSPRINTER

#2 Post by TONYSPRINTER »

NO BODY ? :P
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USASPRINTMAN

#3 Post by USASPRINTMAN »

For what it is worth the TriumphTune Performance Manual says you can take 3 pounds off the flywheel. But it doesn't give a weight.
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Mad Mart
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Location: Winscombe, North Somerset, England
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#4 Post by Mad Mart »

Just weighed one...10kgs.
Sprintless for the first time in 35+ years. :boggle2: ... Still Sprintless.

Engines, Gearboxes, Overdrives etc. rebuilt. PM me.


2012 Porsche Boxster 981 S


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TONYSPRINTER

#5 Post by TONYSPRINTER »

thanks for the replies thats good info as i now know the 1 i have is lighter as mine only weighs 8.5 kgs :lol:
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george

#6 Post by george »

adam weighed a tr7 and 1850 not so long ago i guess if you do a search the info will be there on his posts
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Judge Mental

#7 Post by Judge Mental »

Mine had been lightened and weighs 8.5 kg's as well.
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SprintV8
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Joined: Wed Oct 04, 2006 9:49 pm
Location: Sutton,Surrey.

#8 Post by SprintV8 »

Mine weight's a lot less than that 8) .

Mind you it's not a Sprint one. :lol:
2011 Mini Clubman John Cooper Works. S Daily Driver.
1980 Dolomite Sprint with a touch of BLTS
Balanced Lightened and Tweaked 13B Rotary and SsuperCharged.
Back in my possession 22 September 2019.
Rebuilding the Sprint time taken so far, 111Hrs@15/12/2020
212Hrs @31/12/2021
352 @ 28/11/2022
455Hrs @ 20/10/2023
565Hrs @ 07/12/2024
This is time taken at the Sprint not necessary time worked.

Member TDC no 0471

Project 13B Sprint now back on..
No Pistons No Cams how’s it gonna Run Brap Brap?
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Dollyboy

#9 Post by Dollyboy »

:lol:

lovin you rhumor phil.

dunno how much mine weighs, probably same as scotts...

:shrug:
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SPRINTPARTS

Flywheel Weight

#10 Post by SPRINTPARTS »

As has already been stated, standard flywheel is 10kg, I think the homolgated weight was 9.95kg.

We have used 8.5kg and 6.5kg flywheels. The lighter flywheel does help the motor to spin up faster. We have just had some steel flywheels made which weigh just under 5kg, which will be fitted for next years race season to see if makes any difference in performance.
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Judge Mental

#11 Post by Judge Mental »

:smitten:

I wish there was dribbling smiley!

Mine had been previously lightened in the early 90's when the car was first worked on by the p/o. Mark Fields srint engine in his old TR7 did seem to rev more freely than mine and he had a custom flywheel in that so it is probably worth doing. Properly though I might add (as Sprintparts have obviously done)! I'd quite like the use of my legs for a bit longer!
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