Looking for my 4th genners advice - Honda Prelude Forum

PreludeRacer023 · 07-18-2003, 07:32 PM

MODS whoever moved my thread please allow it here so i can get some replies from the 4th gen people, the NA forum is dead...thanks in advance

well in jan im getting a new bike an 03 gixxer600, also getting an older nissan p/u...so i can finally start really working on my car since i can park it, right now its my only transportation....anyways.....here goes....i want higher comp...but i dont wanna have to sleeve a perfectly good block and aftermarket piston rings dont go well with the material honda puts on the cylinder walls...so...can i use forged pistons like JE or weisco..and use honda rings? if not im going with type S pistons, and a thinner head gasket, i think that will get me near 11.5:1...but i want 12 to 1, next i got my hands on a bare h22 head which im sending out to portflow, saw some very impressive dynos...im doing the whole valvetrain.....i was going to go completely with JUN here...but are the crowers or skunk stage 2 about the same..opinions taken.....im not sure if im going to switch headers, my greddy one is impressive, howeverif i can see distinct proof that the SMSP header is the real deal, ill switch....then i was going to have a custon SS exhaust made..2 3/4" that connect straight to the headerive talked to some and they think this would be a good sizeill be running this to my N1 muffler on my exhaust now, and cutting and using the hanger on it....at the track i run open header anywaysbut with the exhaust opened up, do u think it would benifit running open header anymore?....ok i also plan to add ignition, TB, either a Euro R manifold extrude honed and ported or skunk if they ever get off thier asses....but will a racing one work...alot of people told me thier more for forced induction...tranny, im adding a quaife, and a final drive...ACT clutch SS disc and fidanza flywheel....all this will be run by an FMU greddy maybe? AEM? FAST? still up in the air....at the track ill be running slicks then....what do u guys think, ill take any suggestions, i wanna have my plan laid all out before i start, thanks in advance...peace

ExodusFX · 07-19-2003, 06:45 AM

I guess no one else feels like answering this.

For the higher compression without resleeving the block, jdm type-s pistons are your only options. Our FRM sleeves don't take well to forged pistons. Check the condition of your cylinder walls when you pull the head to see if you need to hone them. Or just buy the .25 over, type s rebuild pistons and oem rings, and bore and hone the cylinders to match.

The thinner head gasket wont bring you much closer to 12:1.

Crower valve train components would be good. The Skunk 2 valve springs have been too stiff for some people's valve train, resulting in scored rockers over time.

Your greddy header is fine. If you end up going with the SMSP, definetly get the custom exhaust piping to match. (SMSP header moves the cat location further back)

Intake manifolds, forget about the Skunk2. And you can run an extrude honed euro r manifold if you're ready to do the modifications to it that are necessary. I'd just send your current intake manifold to portflow and have it ported & matched to your head when they work on it.

Engine management, you've got AEM EMS or Hondata. Just remember that you're going to spend quite a bit of $$ on dyno tuning either system. (I dunno about you, but dyno tuning here is pretty expensive.)

Good luck with your project.

I wish I had a second mode of transportation so that I could get working on mine already.

toofastprelude · 07-19-2003, 04:18 PM

when they port out your head they will mill the bottom of it as well for a air tight seal, have them mill off about .020 instead of the standard .003. gets camshafts and cam gears as well, what are you doing gfor addititioal fuel? i would get my im and head port matched with each other and also hollow out the header a little bit to match your head if you get a serious port job done

THEDREAD · 11-02-2003, 03:35 PM

Jun pistons will work, but they go $1200 for the set....I believe they are 12.25:1 and supposedly works well with 91 octane gas assuming you use jun cams, springs, and retainers