got alot of work done on the block today. i will let the pics do the talking.. they do it better than myself.. for such a small piston/rod combo its almost as big as her..
eh, its not THAT big of a deal to run lower compression, just safer, and to get same power, need to run more boost. i personally would up the compression a little bit from stock if i ever did a build, but i'll never build the motor. i was running 10.3:1 compression (stock) on my tiburon at 10-12 psi for about 20k miles before i sold it, never had an issue. theres some guys in the tiburon community that use stock 1.8L rods and pistons that drop the CR to 7.7:1 (which is really low) but then they push like 30psi.
after reading a couple of really in depth papers about flame propagation across the combustion chamber and motor efficiency with the addition of dynamically increasing combustion chamber pressure. i really would never run anything higher than 8.5:1 in a boosted motor. the freedom gained in tuning, boost pressure and fuel mileage are huge factors in my choice of compression. the biggest factor though was the retention of the tumble humps on my pistons, with a flat top pistons and a 16v pent roof head low speed operation is really not the best, leading to even worse gas mileage and really terrible part throttle operation., making for a not so happy car to drive on a daily basis.
How did you come to this conclusion? you have to take into consideration, that mopar went a pretty low compression on our engines. and every other car is ranged between 9:1 all the way up to 10.6:1. they dont have any of the problems you mentioned..
just to add, my 10.3:1 compression boosted tib was really friendly daily driving, obviously not as good as the srt-4 (as the tib came N/A and i made it F/I) but it was pretty decent to drive everyday.
well i would have to disagree, because every turbo mustang and turbo corvette engine i build, has at least 9.1:1 comp. and they drive perfect.
i'd look at the crank-scrapers.com windage tray/scraper/pickup setup instead of the DCR. DCR's setup looks like it was made with parts from the hardware department at home depot. DCR Crank-Scrapers.com interested to see how the higher compression works out. good luck with your build i didn't see what turbo you're going to run on this?
