Real low compression??
#1
Real low compression??
Well im bored and since my car is still down and probbaly will be down for awhile i thought id ask about a problem i have had for awhile while it was running. As some of you know i turboed my car and blew it up in less then 15 minutes because the vaccum liine from the wastegate melted and came off. So i rebuilt it myself in my driveway. Well i have a jdm b20a from the 85-89 accords in japan and the closest match piston wise i could fine was the usdm preludes b20a5 pistons. So i used those. Well my car has never had more then 140psi of compression in any cylinder since i rebuilt it. I think right now they are all around 130-135psi per cylinder? It runs fine as far as i can tell. I was pushing about 9psi threw it last time i had it running and it was fine? So what could cause the compression to be so low? The only thing i could think of was the new pistons i used were from a different motor and they looked alittle more dished then my old ones were. I have a couple pics of them so maybe you guys could tell.
O and btw: maybe its just my imagination but i check the compression on it alot and it just seems like its slowly going dowm maybe? Its kinda weird? Maybe im just imagining it and just being over cautious or something.
O and btw: maybe its just my imagination but i check the compression on it alot and it just seems like its slowly going dowm maybe? Its kinda weird? Maybe im just imagining it and just being over cautious or something.
#6
Re: Real low compression??
Originally Posted by accordepicenter
i bet the wrist pin heights are different. Thats why you cant run a b series piston in an A20 accord engine, its not the bore or the dish, its the pin height