This Q may sound lame but...

Is it okay to use JUN Type 3 cams on stock B16A? Let say I have the cams and valve spring and retainer upgrades (let say JUN or Toda or Crower valvespring/retainer kit... or probably CTR/ITR valvesprings and retainers).... but keeping the head and the block stock.

I know that it wont bring the cams potential to the max, but I just want to make sure whether if there's any issue with the valve clearance, piston or whatsoever...

by the way.... I'm on B16A OBD-0, PR3 ECU

 

Your gonna be overcammin your engine with those cams

 

I don't think I've ever seen a dyno where Jun 3's actually hurt a motor. I've heard of people dropping them into a fairly stock B16 with results, and I've seen 286 whp out of them. IMO they are the most versatil camshaft out there, yet they can also make a TON of power. I wouldn't run type r valvesprings with them at all though, consider yourself warned on that one. Jun/Toda/RM gen 2 valvesprings and retainers will work well with them, you're gonna wanna rev higher than your stock rev limit...thats for sure.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by clean rice &raquo;</TD></TR><TR><TD CLASS="quote">I don't think I've ever seen a dyno where Jun 3's actually hurt a motor. I've heard of people dropping them into a fairly stock B16 with results, and I've seen 286 whp out of them. IMO they are the most versatil camshaft out there, yet they can also make a TON of power. I wouldn't run type r valvesprings with them at all though, consider yourself warned on that one. Jun/Toda/RM gen 2 valvesprings and retainers will work well with them, you're gonna wanna rev higher than your stock rev limit...thats for sure.</TD></TR></TABLE>

 

nice explanation

my idea was of doing the cams first (together with the valvesprings and retainers just to be safe). should the stock valves do fine? or do i need to upgrade them as well?

only then i do the bottom, because i might probably go with block swap in the future... who knows?

 

You will definetly overcam the engine, but that said get Import Tuner magazine and have a look in ther power pages April issue.

They put Skunk 2 Pro1 cams in stock B16 and made the power, everywhere. Even though they would make more power with more CR it actually surprised me that they got about 15whp up there with the cams...

 

The thing is that it's hard to get Skunk2 stuffs here in Malaysia, unless if I order directly or online. JUN, Toda or Crower is somehow easier to find.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by clean rice &raquo;</TD></TR><TR><TD CLASS="quote">I don't think I've ever seen a dyno where Jun 3's actually hurt a motor. I've heard of people dropping them into a fairly stock B16 with results, and I've seen 286 whp out of them. IMO they are the most versatil camshaft out there, yet they can also make a TON of power. I wouldn't run type r valvesprings with them at all though, consider yourself warned on that one. Jun/Toda/RM gen 2 valvesprings and retainers will work well with them, you're gonna wanna rev higher than your stock rev limit...thats for sure.</TD></TR></TABLE> agree!!!!!!!!!!!!

 

Honestly, cams can make power with out compression. No matter what the compression is, the cams will still increase VE like they would on a high compression motor, its just they will always have less cylinder pressure than a high comp motor. So really the only problem with low compression is it might have a lot more trouble idling than a high comp motor, and the low low rpms will probably be very weak. But once they hit there optimal cylinder filling efficiency, they will make power regardless of compression. Omniman made sick power with compression in the 10's and some pretty big cams.

 

Good response, u just gave me confidense.

 

thinking of adding:
- P30 pistons
- Honda 1-layer head gasket

that should probably bump the compression ratio to 11:1 (using c-speedracing c.r. calculator) with my stock JDM B16A OBD-0 (PR3 head+bottom). any opinion?


Modified by soulfly at 12:37 AM 2/17/2006

 

get a OS ctr piston(or some forge pistons like toda/wiseco) sir.

just get a good tuner.

 

mods listed here:
http://www.g-speed.com/eg2/mods.shtml

 

Raging angel, what rpm do you rev to and what is the tune on the Jun Cams I don't think I saw pistons on your set up. Nice set up I have a GSR and am thinking of dropping the Box bs in there.

 

pm'd

 

It looks like it started to fall off at around 8700.

 

lol, overcammin..... new show on speed perhaps???

 

RagingAngel,

what fuel do you run at? we get 97RON here (Shell Super Unleaded)...which is the normal pump gas.

the VTEC was at what RPM?

185whp is not bad for a stock bottom

 

i thought overcamming is not a good thing

 

It is not, but people figure build on what motor is good at b16=rev high.

No bottom end anyway, so over cammed will be even worse, but once you get into rpm, it comes alive.

Also a lot can be done with adjusting cam gears to compensate, so some engines keep whatever they have down low, and then rip once they get into rpms...