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lamchop77 · 01-14-2009

Bob

Thanks for the reply. Wanted a ball park figure so i can get on with the design of the piston. I have 2 fully built up heads (1 2.0 and 1 2.2) that i can usen so just debating which to go for. Both are fully ported and fitted with 46/41 valves and i want to design a piston to use with both heads. I know there will be differences with the comp ratio but i can live with that.

The 2.0 head on the 2.2 (std pistons with 5mm deep cut outs) had 3mm of clearence when checked with a 244 kent cam, that has a valve lift of 11.75mm( i think) so i can work from that for the piston design. I was hoping to get an order no just so JE can see what i'm aiming at and then get some advice of them as well.

What comp ratio do you think i should aim for as we have to use standard pump fuel, but we can add certain additives that can increase to 101 octane but thats the limit no race fuels are allowed.

Thanks again

Chris

01-14-2009	#54 (permalink)
lamchop77 Opeler Join Date: Aug 2008 Location: England, leyland Posts: 77	Bob Thanks for the reply. Wanted a ball park figure so i can get on with the design of the piston. I have 2 fully built up heads (1 2.0 and 1 2.2) that i can usen so just debating which to go for. Both are fully ported and fitted with 46/41 valves and i want to design a piston to use with both heads. I know there will be differences with the comp ratio but i can live with that. The 2.0 head on the 2.2 (std pistons with 5mm deep cut outs) had 3mm of clearence when checked with a 244 kent cam, that has a valve lift of 11.75mm( i think) so i can work from that for the piston design. I was hoping to get an order no just so JE can see what i'm aiming at and then get some advice of them as well. What comp ratio do you think i should aim for as we have to use standard pump fuel, but we can add certain additives that can increase to 101 octane but thats the limit no race fuels are allowed. Thanks again Chris