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turbocharged 325i
Posted: Mon Jan 29, 2007 9:39 pm
by glenndoll
hi. can anyone tell me what size pistons i will need to gain the low commpression to run a turbo on the m20 engine, can i use the standard crank and do the 318is pistons work.
Re: turbocharged 325i
Posted: Mon Jan 29, 2007 9:56 pm
by Turbo-Brown
If you've the later spec engine you've already got an 8.8:1 compression which is plenty low enough for lots of booooost
Welcome to the Zone by the way
Re: turbocharged 325i
Posted: Mon Jan 29, 2007 9:59 pm
by fuzzy
dont most of the turbo'd m20 zoners run on standard compression anyway?how big boost can you run on standard compression?
oh and welcome also mate
Re: turbocharged 325i
Posted: Mon Jan 29, 2007 10:05 pm
by Turbo-Brown
Yeah, pretty much all of us do as far as I know. I'm higher than most as mine's the early engine, but it's still only 9.7:1
Soon to be remedied though as I'm gonna ask for 8:1 pistons when I make my evil-twin
Re: turbocharged 325i
Posted: Tue Jan 30, 2007 11:47 am
by Robin_xr4i
Depending how much meat the pistons have on them, can't the original pistons be machined down to lower compression?
Re: turbocharged 325i
Posted: Tue Jan 30, 2007 1:32 pm
by Turbo-Brown
They probably can be, but the crowns are a funny shape so it'd be a pain in the bum IMO.
Re: turbocharged 325i
Posted: Tue Jan 30, 2007 9:45 pm
by basil
im running standard internals on an early engine its no probs as long as you dont run to much boost
Re: turbocharged 325i
Posted: Tue Jan 30, 2007 9:54 pm
by sam325is
there is a 9 sec m20 e30 running original pistons, about 600 hp