okay im looking at either a high compression piston, or a low compression piston for my 4g63 non turbo motor 93. and i was wondering what would benefit the non turbo setup, and what would see more of a power gain? because this is probably going to be my biggest power gain is a new piston/rod combo from eagle so i want to have a well rounded level of power from low rpms to mid to high and well im not sure what path to go....

i either want a 9:1 compression ratio, or an 8:3:1 compression ratio.

IF you go lower compression you're already setting yourself up for F/I. The fact that you're running a 4g63 non turbo practically screams at you not to go F/I tho. I would go with the 9:1, maybe even higher.

okay cause i was talking to my mechanic about the pros and cons on n/a vs turbo and a set of pistons would benefit a non turbo motor simply because of the ratio im assuming, and because there 1mm oversize stock and forged thats gona help out a lot. im not to aquatinted with pistons and compression ratios quite yet but im learning....


i wana to have a setup where the power is going from low rpm all thw way to high rpms without boost.....so i dont know if that sounds vague or confusing, but i was just asking what kind of pistons would cause that to happen

You need to go with high compression if your not going turbo.

with a 9 or a 8 compression that is still low. you need something like a 10 compression. higher rev would be good too.

they make a 10:1 compression piston? :)

i'll try to look into that, cause the only ratio i found with the highest compressiopn was 9:1

It will probably be hard to find high compression pistons for your car because your engine was meant to be stock turbo lol

you can get custom piston made

The 3000GT non turbos are 10:1. I would suggest nothing lower then that.

P.S. I really hate this idea of an all motor eclipse, it sounds like you have to much honda left in you. The reason I say this is because Honda Motors have been known to kick **** while being NA because their cars weigh in at under 2000LBS

Your car?

well dude your right. i am a honda freak, cause its what im surounded by with all my friends driving hondas and them all racing everyone and beating the piss outa everyone with their little dohc vtec motors almost bone stock.

but i really like the idea of a naturally aspirated car cause its more reliable and there's not a whole lot you can do to mess **** up unless you drive it into the ground, but everyone does that now-a-days.

but i want to build a n/a eclipse cause no ones done it and i want to prove people wrong when they say your wasting your time and money....

Well you are...

what wasting money or the honda freak? but think about it dude. if i take the advantage and fully build my motor with everything from the ground up so its boost ready if i wanted to throw together a turbo setup it wont be beneficial cause i built my motor. and i heard time and time again the stock internals, blocks/heads can handle anything you throw at it, and this case its lots of boost....so i think im on the safer side with the build. but i just love how a n/a motor sounds once it hits its peak and just takes off......

No because when you dig into your motor you have to decide what compression you are going to run.

High compression and boost isn't an option.

Low compression and your soft on power with out a turbo

i just want to have a 220hp n/a fully built motor

with the basic boltons and a fully built internal setup/head

Price it out. Its not cost effective at all. And I don't see you making that power.

well i know for starters i either wana rebuild my 50k 4g63 non turbo motor, or get the same motor with like 30k on the motor and rip it all apart and replace everything.

but the really big upgrade im getting as far as performance goes is the crank, and pistons/rods and eagle makes the whole rotating assembly (pistons rods and crank) for around 1300 on slowbowracing.com i think. im not positive on the price but after that im going with a buschurracing stage 1 head with valves springs and retainers from them included in the head for around 670. the clutch im up in the air about cause im torn between a few. unorthodox ss pullys are like 350 and cam gears then im done


i just dont want to boost my car. if that makes it any easier to understand why i want to go n/a