|
Don't get too excited about squish as it't not that important. 0.40" is fine. With 4 valve enigine it's important because of the tiny area squish covers. With B18B, B20B & B20E Engines, the fact that most of the cylinders swirl comes from the inlet port & additional squish comes from the huge flat area. On my heads, I like to get rid of the plug side squish, changing the combustion chamber from an old school tub chamber to more of an open chamber style.
When I had no money, I placed a midly ported 73+ 44mm inlet head on an eyelashed B18 bottom end with B20 rods, B18B intake, B20E exhaust with a 240 degree@0.50" cam and although gutless, it reved to 8000rpm easily. Not the greatest thing I ever screwed together, but I was found of it. My friend I went to school with rebuilt his B18B +.040" with a 'D' cam, since that was what my cam was stamped with + he added the good 360 degree Lynx intake with a single 45DCOE, but he couldn't touch me. His engine was hard to shut down, being 0.040" + mild shave to keep it neat, so about 10.5:1. Mine was lucky to be 9:1 & had no problems on the stock fuel that was kicking around.
What I took from this is inlet porting is FAR more important than compression ratio and in the many B20B I have built, this is always been the case.
--
Three 164's, Two 144's, One 142 & a partridge in a pear tree.
|
