need some input on a budget 318 build
Timo, welcome aboard!
The exact depth of the piston should be measured. This would be in thousands of an inch. (.050 or .080) You'll need the proper gauge for this. It kind of stinks because the American way of measuring these things is different than how you do it. I do not have a conversion table at the ready.
Compresion is a key item to have and part of the combonation that makes things tick.
I would use 1-5/8 tube for headers.
Can you or will you change the gear ratio in the rear? And the stall converter, will it remain stock?
thanx
- conc. CR i used this link to get some figures
http://www.csgnetwork.com/compcalc.html
as long as flat pistons are used it would be not so complicated to calgulate CR as it will get with domed pistons
these are the numbers i´m playing with..
3.94" boresize
3,312" piston stroke
4.180" head gasket bore dia (guess this is the most common size)
0.039" head gasket thickness (somewhat between an expensive 0.020" and the cheapest one 0.052"
63.5 cc chamber size
0.0381" piston under deck (translated from 1,5 mm)
the result should be somewhat about 9.28 CR
( your right if you force me to measure the under deck clearance exactly, the currently numbers are measured with a steel rule - so i have to check for a proper gauge to get it in a correct way)
conc. the rear and the converter...if possible i will keep them, cause normally i do a lot of miles/kilometers on the German Autobahn to reach as much Mopar(or US-Car-)events as possible.... distances between 200 and 300 are normal, i also use the fish to travel somewhere in europe (Italy, Swiss, Austria which means about 600 miles)
conc. the header tubes.... a "weld yourself" kit with 1 3/4 tubes is allready purchased last year and since that it is sitting in the garage waiting to be fixed
http://www.speedwaymotors.com/Mopar-Header-Kits,3841.html