What's a suitable value sizes for a 1641 dual carbs engine? Eventually when my KG engine gives up the ghost, I have a set of 87mm P&C and TP heads ready for it. Don't have carbs for it but most likely it will be Kads.
Raf

[Edited on 5-9-2003 by vanderaj]

Sorry Raf - dont understand?
Do you mean head valve size??

Is so i would just go stock. Bigger valves leads into the world of needing experience. A stock valved head that has been ported right will work great.
But it is not a single question

What cam?
What compression ratio?
What exhaust?
Heat?
Carbs?

If you are going to run a set of kads then i would go stock valve, head work and a mild cam

Gee, too much for me to decide on man
I have a mild cam that I was going to use for it. I want to keep the heater boxes because the engine will be in my daily driver. Most likely 40mm Kads. Exhaust? Do know. Compression? I have very little idea about this so will go whatever is recommended. Crank will be balanced stock. So it seem stock valves are the way to go, right?
Raf

[Edited on 7-8-2003 by karmannghia60]

Definitely

Bigger valves will only cause trouble and stop it working "together"

Try and set the compression to 8:1 and a good header system

Thanks for the advice

Hey Raf i'm building a1641 as well, mild cam balanced stock crank, lightened fly wheel, ported stock valve head and turbo.
Get all the bits back from machine shop next week then the fun starts.

OK, keep me posted. What sort of turbo are you using?