Found Problem Loss Compresion In Cylinder 6!

[Daboss]

Hey forum how you great bunch of guys doing? Ok confirmed my problem,lost compression on cylinder 6 so its likely the rings. Compression on 6 is 50 the rest is in the 150's so now i'm gonna rebuild cause it all has to come off anyway. My horsepower goal is 400 to 450. What I need to know is if i need anything else to achieve my engine strength goal. So far I have a cometic triple layer head gasket 1.2mm, strengthened timing belt, tensioners, water pump, oil pump, main bearings and connection bearings and I am looking into a set of mahle 87mm pistons with these specs: RB25DET 87.00 Bore, stroke:71.7mm, rod length:121.5mm, pin dia:21mm , comp height:31.3mm, dome volume:11.5cc, weight:343g, 8.5:1 CR. What does all the specs on the pistons mean and will I run into any problems with this build? I am keeping the same rods and everything else I didn't mention. So what do you guys think and any ideas as to what else I will need, or if you think this will be enuff to sustain 400 to 450 horsepower? Forged from 4032 high silicon low expansion aluminum alloy, is this good or bad for my application?

Edited January 10, 2008 by Daboss

[Daboss]

SO nobody can offer any advice even if it is to tell me that i am headed in the wrong or right direction?

[R31Nismoid]

Of late there have been 3-4 pretty detailed rebuild threads dude.

People kinda get tired of posting the same info thread, after thread