One Carb Or Two?
Posted 13 March 2014 - 03:16 PM
Picture says it all really....
I'm putting A+ flat tops into my A series block. Apparently it can be done as they're 'exactly the same'. I offered two other pistons with their con rod and the A+ ones definitely look a bit longer...
How has this happened????! Anyone got any answers/suggestions???
Thanks,
Iain.
One Carb Or Two?
Posted 13 March 2014 - 03:40 PM
I don't suppose this has happened because the piston and con rod are the wrong way round???
One Carb Or Two?
Posted 13 March 2014 - 03:44 PM
Just found something saying i need to swap the crank to a the A+ one other wise this will happen... Is that true??
On Sabbatical
Posted 13 March 2014 - 03:49 PM
One Carb Or Two?
Posted 13 March 2014 - 03:52 PM
The A+ flat top piston number is: 21964 G8
The A dished piston number is: M2007 C4W
One Carb Or Two?
Posted 13 March 2014 - 03:58 PM
Have both the A and A+ cranks got the same stroke?
Super Mini Mad
Posted 13 March 2014 - 04:00 PM
There was a different rod for the press fit pistons. Not sure if it was a different length though. Are the rods correct for the pistons?
One Carb Or Two?
Posted 13 March 2014 - 04:08 PM
There was a different rod for the press fit pistons. Not sure if it was a different length though. Are the rods correct for the pistons?
The flat tops and con rods came out of another engine as whole units, so yes they're the right rods for the right pistons.
I have just came across this from another thread...
Edited by IainNeon91, 13 March 2014 - 04:09 PM.
One Carb Or Two?
Posted 13 March 2014 - 04:23 PM
Here's a comparison..
Left - Dished pistons that were in the engine
Right - Flat tops out of an A+ 998
Edited by IainNeon91, 13 March 2014 - 05:05 PM.
Super Mini Mad
Posted 13 March 2014 - 04:55 PM
The 1098 issue is because the crank is a longer stroke and has shorter rods than the 998, so not relevant to your problem if they both originated from 998's.
The piston on the right looks like the late model press fit.
One Carb Or Two?
Posted 13 March 2014 - 05:04 PM
I just looked up my crank number (12G82)
And according to this, it's an 1100cc crank, which has a longer stroke. I'm going to need the crank that my flat tops and rods came off!
Super Mini Mad
Posted 13 March 2014 - 05:17 PM
That would explain it!
On Sabbatical
Posted 13 March 2014 - 05:20 PM
One Carb Or Two?
Posted 13 March 2014 - 05:34 PM
It does look like the piston on the right is taller as the bottom of the arm is lower?
One Carb Or Two?
Posted 13 March 2014 - 05:57 PM
well it looks like this now haha
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