Motor:
84.5mm bore B20Z, RS Machines 84.5mm cast pistons
OEM rods with ARP small bolts, rods caps decked + align bored
Block decked 0.004", 0.004" piston-deck clearance
OEM CRV 84mm headgasket
ARP studs, stupid tight
GSR head, milled ~0.035" (pretty much to valve seats), stock ports and chambers
Skunk2 Pro series IM, 65mm body
Random hytech knock off header with 2.5" collector

made 196hp / 148 tq or so on 96 spec JDM ITR cams revving to 8000 RPM.

I need a better cam (duh) but I am very picky. I will be getting new LMAs as I am running stock ones currently. I have access to a Belben cam degreeing fixture for installation.

1. I do not want to have to rev the engine past 9000 RPMs to make power. 8800 or less preferred.
2. I am not interested in changing my rods (LS w/ ARPs), cam gears (BDL), valvesprings (supertech high lift all motor B - valvesprings are specced to handle Pro2 lift), retainers (custom Crower chromoly) or valves (stock, unmolested GSR). This is why I do not want to rev the motor faster than necessary.
3. I am not interested in peak power. I am interested in TORQUE, MID-RANGE and area under the curve.
4. I'm not interested in any cams that require flycutting the pistons for piston-valve clearance. RS pistons, figure 0.040-0.050 mill+deck total.

I have been considering:
-Skunk2 Pro1 (did a set in a similar motor, wasn't so impressed with them but didn't get a chance to play with gears which is huge...)
-Skunk2 Pro2 (concerned about how high I'd need to rev the motor, wonder how much the powerband can be shifted down with gears)
-Skunk2 "tuner" 2 (oldie but a goodie)
-Buddy Club 4s (oldie but a goodie)
-Rocket M22X/XX/XXX/etc. (again, I've had a lot of luck with these over the years. I'm not replacing valvetrain though so...)
-Toda C (oldie but a goodie)

I can get the Skunk2 and BC cams cheap through shops I tune for. The Todas would be several hundred dollars more. I don't know how much the RMs would cost or if I'd be able to get the cams w/o the head package. I'm not really looking to spend $1000 on cams, but if they're genuinely the best (and the dyno will show) I don't mind it. I probably will end up throwing more than one set of cams in the motor eventually, but it would be nice to pretend I will get it right the first time...

Any other suggestions? Anyone know what cams Combustion Contraption used for that 89x85 build? (I tried searching)

There will be a build thread / writeup regardless. I got stiffed on a set of BC4s and am now the proud owner of a set of used Peak Performance cams (ugh). I don't know if I'm brave enough to install them...

 

CC used Pro2's in his motor. With your desired rpm range, I would be looking at Pro1's or Toda B's. I think the 2's and C's would want to rev higher than what you would like, and anything RM is gonna do the same unless Rock could maybe grind you a custom profile. From the choices you listed, Pro1.

 

Are U sure about that 11.1?! U are over 12.5:1 I think...
It wont make sence to rev past 9K a setup like that, even with a large cam it will peak ~8300. Cams are OK U mentioned, except for Pro1.

Here is a similar build, we used M24x cams (if we have chosen M22x than midrange would be better IMO)...:
http://www.youtube.com/watch?v=rs9AXImq03c

 

Endyn Bumpstix

 

Pro2, BC stg3 (search under d-rob. Bill made 240 whp), Toda C, etc.

 

koczeka: You are right, the motor is probably much higher compression. The pistons I think are supposedly 11.9:1 with a GSR head and no milling. With the milling and decking 12.5:1 sounds more reasonable. Truthfully, I don't really care about the compression - I care about making it work. Thanks for the PM btw.

I've had *zero* luck with BC3 cams. They haven't really done significantly more than ITRs in my experience. Same deal with Toda Bs.

CC's 85x89 only made power to the high 8000s if I remember right from the dynos. I was very impressed with this. Perhaps I will give Pro2s a try and just try to use the gears to move the powerband as low as possible.

Thanks.

 

The Pro2's can be dialed in to give peak in the 82-8400 RPM range on that size engine. Besides a stock head on size engine will not support more revs than that. PM me if you have a question.

 

maybe something in ur set up is simpy holding u back? stock head, random chitech rep, s2 p im & 65mm tb.... who knows? from the testing i've done, i quickly learned that its not always the cams holding engines back.

 

I got your IM's on AIM, but youre not online now, so I'll reply here.

When I put my engine together, I knew it was going to see mostly street miles, so everything was done according to that. Thats why I chose the TB size I did, and the intake manifold I did, to support a streetable rev range. (68mm and PERFORMER X) For what its worth, in the next 2-3 weeks I will be doing a manifold test on that engine by switching from the PERF. to a VICTOR with no other changes.

 

youll have to keep me posted on that! I wanna see what it do!

 

You've got virtually the same set-up as Bill except for a victorX manifold and BC3. He made 240 whp. Maybe that manifold is holding you back.

 

My father's old stock-sleeve B20/VTEC was utilizing Brian Crower Stage 3's, not Buddy Club.

- Derek

 

That would explain a *lot* - thanks for the clarification.


Also - the only cam that has been in this motor is the 96 JDM ITR making 196. My comments about other cams are based on other motors I've tuned in the past.

 

I know this is a old thread but you actually put brains behind what you do haha. any updates?

 

dmn was this dynoed on 6th gear?

 

Nope, 4th. It is MAHA dyno.

 

I'm running a similar setup and using tuner stage 2, they work great in my setup.

 

pro2's or m24x