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Model specific boards => Golf mk2 => Topic started by: dan7 on 01 November 2009, 20:32

Title: Difference between 9A and KR rods & pistons
Post by: dan7 on 01 November 2009, 20:32

I know the 9A is 2ltr and KR is 1800. BUT, could I swap my KR rods for 9A ones to shorten stroke, to increase cc's?

Title: Re: Difference between 9A and KR rods & pistons
Post by: DOA on 01 November 2009, 21:36

Doesnt work like that Im afraid. If they are shorter (no idea if they are but Id be surprised) you would just end up with a really low compression engine . What you need to get what I think your after is a longer throw crank with shorter rods.

Title: Re: Difference between 9A and KR rods & pistons
Post by: danny_p on 01 November 2009, 22:08

rods are same length 144mm,   the differance to take account of the diffrent throw in cranckshafts was done by changing the compression hight of the piston

Title: Re: Difference between 9A and KR rods & pistons
Post by: AudiA8Quattro on 01 November 2009, 22:23

So the pistons were shorter on the 9A?

Title: Re: Difference between 9A and KR rods & pistons
Post by: danny_p on 01 November 2009, 23:36

grudion pin is slightly closer to the pison crown in the 9A when compared to a Kr