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| Re: Rebuilding FS5W60A |
Subject: Re: Rebuilding FS5W60A
by Rallytwit on 2018/4/10 4:48:16
Dave when I mentioned th 28lb weight saving it was 16lbs difference for the transmission and the 12lbs between the A12 & A15. Granted I weighed them with a bathroom scale but I have the 60 series 5 speed at 54lbs and the 63 series at 65lbs give or take.
The 14lb lightened flywheel will drop another 6lbs, so you can get a whooping 34lbs. If you use an early A12 starter that's 1.8lbs lighter, one of the alternators is also slightly lighter by 1-2lbs (I'd have to look at the spread sheet) additionally the crank pulley with triangle holes is 200grams lighter that the one with round holes. So hold,on to your socks you can cut 38lbs.
I know I've mentioned it before but with GX valve springs I was spinning the A12 to over 8000 rpm.
On the A12A one could use Honda D15 or D16 pistons (75mm with close to a 30 pin height) in conjunction with A14 crank and the only machining needed would be putting the pistons on the rods. That would take the motor out to 1360cc and with GX head compression would be 10.8 thereabouts. In my case with the 27cc milled head I have it brings it up to 11.5
In my case the the rules allow for a for huge displacement increase, so 1360 is well within that.
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