The BSA A7-A10 Forum

Technical => A7 & A10 Engine => Topic started by: nimrod650 on 04.01. 2016 18:01

Title: a10 pistons
Post by: nimrod650 on 04.01. 2016 18:01

spoke to a guy at york autojumble he had re-bored and  rebuilt his s/rocket engine and used new peogeot car pistons ???

Title: Re: a10 pistons
Post by: Greybeard on 04.01. 2016 18:35

I look forward to hearing what the forum elders have to say about this.

Title: Re: a10 pistons
Post by: bsa-bill on 04.01. 2016 18:52

who would have thought the Peogeot would have used BSA pistons eh

Title: Re: a10 pistons
Post by: wardleybob on 04.01. 2016 18:58

I used to use datsun cherry pistons std  were plus 80 for an a 10. Also T150  160 pistons  fit a7s .

Title: Re: a10 pistons
Post by: muskrat on 04.01. 2016 19:18

The trouble with A75/T150/T160 pistons in an A7 is the crown height. I used A10 rods shortened by about 2mm, this gave about 14:1 comp.
Cheers

Title: Re: a10 pistons
Post by: BSA_54A10 on 05.01. 2016 03:04

Generally it is a bad idea to fit a watercooled engine piston into an aircoled engine.
The car pistons are generally lighter and have less ovality than bike ones.
You might get away with it on a bike you run lightly but don't be suprised if the crown splits off or you get excessive piston slap.

OTOH deisel pistons can take it but you need to do a reasonable amount of machining.