95” Piston selection question???
#21
1931, I put the frt. cyl. together & torqued head to Cometic specs, 42 fp. Then when I took the rear off, I saw the o-ring on the case dowel which I didn't know was there on the front. (It stuck to the bottom of the frt. cyl and I didn't see it). Dumb A$$ mistake but glad I saw it before getting it all back together. So I will not be able to re-use the MLS gasket? Crap, that's another $30 & 1 week wasted since I gotta order that. Looks like I'll at least have 1 spare gasket since they come in pairs.
The OEM .045" gasket compresses, down to .040"-.042" so your calcs could be a bit off if you use the OEM gasket but not enough to make any difference.
#22
#23
Valve to piston clearance
How much Valve to piston clearance should this engine have? I got a piece of .100 solder down the spark plug hole since the head was already torqued. Installed rockers & adjusting pushrods to chek clearance. djl recommended .065 solder but I only had .100, stopped till I get an answer.
Thanks,
Roy
Thanks,
Roy
#24
#25
How much Valve to piston clearance should this engine have? I got a piece of .100 solder down the spark plug hole since the head was already torqued. Installed rockers & adjusting pushrods to chek clearance. djl recommended .065 solder but I only had .100, stopped till I get an answer.Thanks,
Roy
Roy
I use .060" solder because that is the minimum and, in most cases, you have that clearance so the solder never gets compressed. I would be concerned about using the .100" solder fearing that for some reason, the solder would be compressed and possibley break off a piece and the head would have to come off. But that's just my **** retentive nature; might not be an issue.
I can't believe you can't find .060" solder; it's such a common size. Radio Shak and Home Depot both carry it.
You probably don't have an issue but better safe than sorry and I would check even if I had to pull a head but that's your call.
#26
Just curious, are there no aftermarket ignition modules for a carbed TC that let you tweak the timing curve?
#27
#28
Daytona Twin Tec and Crane both make a programmable ignition for carbed Twin Cams. I am guessing based general knowledged but would guess the DTT is the more commonly used hardware. While these units are programmable, there are pre-programmed ignition curves and, usually, one of those will work just fine. But, if you have the cables and hardware (separate purchase) you can tweak.
http://www.daytona-twintec.com/products_carb.html
http://www.daytona-twintec.com/products_carb.html
#29
All cleances checked good & A few questions as I wrap this thing up. I Just need to get the exhaust, carb & fuel tank back on & ready to fire it up. It was jetted very good before. With the same cams but now big bore, higher comp. & prted heads what can I expect? I wonder how much the jetting will change? Also what's the recommended breakin? Just a couple of heat cycles?
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04-05-2011 06:34 PM