I think, for once, there are not any differences between these crankshaft.
As far as I know, they are the same in every detail.
Marcel
-----Oorspronkelijk bericht-----
Van: Fot [mailto:fot-bounces@autox.team.net] Namens John Hasty
Verzonden: donderdag 31 juli 2014 5:50
Aan: Tim Murphy
CC: <fot@autox.team.net>
Onderwerp: Re: [Fot] TR3 vs TR4 crank, differences?
Dream on.....
Sent from my iPhone
> On Jul 30, 2014, at 11:34 PM, "Tim Murphy" <timmurph@fastbytes.com> wrote:
>
> I'm thinking of prepping a crankshaft for our TR4 vintage racer. I
> have at least one TR3 crankshaft, a TR4 crankshaft and one or two
> other unknown spares. Are there any differences or are they the same
> and can be used in a TR4?
>
>
>
> I first plan to have it crack checked and checked for straightness and
size.
> The next step would be balancing and lightening possibly? Is there
> any significant advantage to polishing the crank, other than that it
> looks real pretty? Then I was going to have it bead blasted and
> nitrided and finally ground with the proper radiuses and fillets. I
> have to review Kas's books to check for other tips. I've got CRS
> disease (Can't Remember Stuff) and it's been awhile since I read some of
those books!
>
>
>
> Thanks for the info and any other tips on crank prep. Once I've got
> the "new" crank I'll install it on the following rebuild with the
> thought that with the forged pistons, Carrillo rods and the "new"
> crank, we should be able to use 6500 RPM reliably.
>
>
>
> Tim & Ryan 1961 BRG TR4 #317
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>
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