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+--- Thread: Flywheel Diameter (/showthread.php?tid=1638)
Flywheel Diameter - Colin Wilks - 29-08-2018
Please does anyone know the diameter of the standard flywheel across the starter ring teeth?
I am trying to improve performance on my sports engine by changing out the jets in the 30VE1 carb and also playing with the timing. I am wanting to work out where I am in degrees BTDC.
Original carb set up was Main - unknown(!) and Compensation 60, so not having a 90 I am trying an 85 main and a newer 60 compensation jet (haven't got a 55). Slow running stays the same at 60.
Original timing was set up as 1.25" BTDC fully advanced and I have subsequently advanced this a further 5°, so am tipping I'm now around 18° BTDC fully advanced, but want to check this.
Many thanks
Colin
RE: Flywheel Diameter - Terrytuned - 29-08-2018
Colin each tooth on the ring is spaced at 4.5 degrees.
Terry.
RE: Flywheel Diameter - Colin Wilks - 29-08-2018
(29-08-2018, 04:21 PM)Terrytuned Wrote: Colin each tooth on the ring is spaced at 4.5 degrees.
Terry.
Cheers Terry, very handy to know. Foolishly I measured the 1.25" on the flywheel, but didn't record the number of teeth, hence my query re the diameter so I can work backwards.
RE: Flywheel Diameter - Colin Wilks - 29-08-2018
Think I've answered my own question.
http://www.austin7.org/Data%20Pages/Tech%20Data/
states that 1 7/8" at flywheel = 20°
From this the flywheel circumference is 33.75" and diameter is 10.74".
My 1.25" BTDC at the flywheel is 13.3°, so 1 inch at the flywheel equals 10.7°.
I really must get out more!
RE: Flywheel Diameter - Zetomagneto - 29-08-2018
(29-08-2018, 04:21 PM)ETerrytuned Wrote: Colin each tooth on the ring is spaced at 4.5 degrees.
Terry.
Another good reply from Terry