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36-1 toothed Pulley
phoenix70 - 14/9/09 at 01:14 PM

Hi,

Is there any way of getting a pulley with a 36-1 toothed wheel built in that will fit a Pinto.

Got a standard wheel mounted to my pulley but just wondered if you could get one built in.

Cheers

Scott

blakep82 - 14/9/09 at 01:18 PM

is the edge of the pulley fairly meaty?
i've seen a photo somewhere of a pulley which had holes drilled into the side of it instead of the usual arrangement. can't find a photo of it now though...

whitestu - 14/9/09 at 01:37 PM

There was an article in PPC the other week where they drilled 36:1 holes in a crossflow flywheel to replicate the set up on a Zetec.
Can't see why that couldn't be done on a Pinto

snapper - 14/9/09 at 07:46 PM

I thought about having a crank pully for a car with power steering machined but it weighs a ton so went for the trigger wheel option and will tack it on

iank - 14/9/09 at 08:12 PM

quote:
Originally posted by whitestu
There was an article in PPC the other week where they drilled 36:1 holes in a crossflow flywheel to replicate the set up on a Zetec.
Can't see why that couldn't be done on a Pinto


It was Dave Walker that did that IIRC. It was done on a milling machine to get the accuracy required.
Need to be careful regarding the balance of such a thing.

blakep82 - 14/9/09 at 11:58 PM

quote:
Originally posted by iank
quote:
Originally posted by whitestu
There was an article in PPC the other week where they drilled 36:1 holes in a crossflow flywheel to replicate the set up on a Zetec.
Can't see why that couldn't be done on a Pinto


It was Dave Walker that did that IIRC. It was done on a milling machine to get the accuracy required.
Need to be careful regarding the balance of such a thing.


but do you really? a normal trigger wheel is never going to be in balance as its got a tooth missing. i don't think it'll be too bad unless you drill the holes on one side twice as deep as the opposite side

rusty nuts - 15/9/09 at 06:38 AM

Not sure it was Dave Walker who modified the flywheel in the PPC article? I would have thought that as the engine in question was being rebuilt and modified it would have had a full engine balance carried out. I would be more worried about the fact that the flywheel is cast with 36 possible stress points put in.

MikeRJ - 15/9/09 at 12:45 PM

quote:
Originally posted by iank
It was Dave Walker that did that IIRC. It was done on a milling machine to get the accuracy required.


Actually they drilled all the way through the original cut outs in a Zetec flywheel and then used it as a drilling guide for the crossflow flywheel. No rotary table or milling machine etc. was used IIRC.

quote:
Originally posted by iank
Need to be careful regarding the balance of such a thing.


You certainly do. PPC had theirs properly balanced along with the crank.