396 stroker
Ideally, shoot for .035". I know guys like Ed have a measurement on EVERY hole and can squeeze tighter than that, but it's a risk not worth taking for us mere hobbyists 
Your options of .015 deck clearance/.026 gasket, or zero deck with a .038 or .040 gasket are fine.
Your options of .015 deck clearance/.026 gasket, or zero deck with a .038 or .040 gasket are fine.
.026" & .015" is OK. I won't run one closer than .038" total. A lower RPM engine might get by a tad closer. I have hit pistons against the head at .036" total. That loads the rod bearing, and upsets ring seal.
I do measure every hole, and sand piston tops to equalize deck clearance.
I do measure every hole, and sand piston tops to equalize deck clearance.
Okay, on to the next issue...I just spoke to Callies on the phone regarding the availability of a Compstar Crank in a 3.875" stroke for a 1pc RMS. They do not sell one. This explains my inability to find one for sale. Can anyone recommend a suitable quality crank near the compstar price range? Or am I going to have to go the Eagle route?
I have a forged Scat crank in my old 383", one piece main seal. Very nice crank.
I have a piece of 3/8" steel plate a friend of mine parallel flat ground both sides.
I lay it on the shelf in my parts washer with the solvent pump running solvent over the black "wet or dry" automotive sand paper on it. Figure 8 motion, usually 100 to 120 grit if I need a couple thou off. Then slick it up with 320 or 400. Only works on flat tops of course. LOL
Glass is pretty flat, probably plexiglass glass too. Something like 1/2" or 3/4" plexiglass would probably be flat enough. Ace Hardware has plexiglass or clear plastic. Not sure how thick they carry.
I have a piece of 3/8" steel plate a friend of mine parallel flat ground both sides.
I lay it on the shelf in my parts washer with the solvent pump running solvent over the black "wet or dry" automotive sand paper on it. Figure 8 motion, usually 100 to 120 grit if I need a couple thou off. Then slick it up with 320 or 400. Only works on flat tops of course. LOL
Glass is pretty flat, probably plexiglass glass too. Something like 1/2" or 3/4" plexiglass would probably be flat enough. Ace Hardware has plexiglass or clear plastic. Not sure how thick they carry.
Staging Lane
Joined: Apr 2008
Posts: 81
Likes: 0
From: west valley utah
I tore it down only to find the head gasket upside down, freshened up all new gaskets, checked crank and bearings and all were fine, put it back together and it really runs but yes want tons of timing it scared me the first time I went past 36 total but it wants more I just don't know what it truly wants for total timing set at 36 total right now as a few people told me not to go further I have been at 42 total and it still runs without and detonation issues. havent had the chance yet this year to get it out of the garage, but will soon and get some more drive time on it.
where would you set timing?
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Okay, on to the next issue...I just spoke to Callies on the phone regarding the availability of a Compstar Crank in a 3.875" stroke for a 1pc RMS. They do not sell one. This explains my inability to find one for sale. Can anyone recommend a suitable quality crank near the compstar price range? Or am I going to have to go the Eagle route?
http://www.summitracing.com/parts/mor-38315/overview/
Staging Lane
Joined: Apr 2008
Posts: 81
Likes: 0
From: west valley utah
they are Ross Domed for nitrous but when I look at there chart they don't have a 4.030 piston on a 3.875 stroke so I can't plug in the numbers in a calculator without knowing the true dome measurement.
heads are 76cc though that was confirmed by AFR.
these are the early cnc competition ready castings not the newer race ready pretty machined ones.
Ed what would you think is the compression if you had give a educated guess?
