Is there a big difference between the rm22x or the rm22xx.

I currently have a b16 with rev valvespring and titanium retainers. supertech flat faced valves, mild port and polish and custom itb's. The bottom end i have overcized CTR pistons, on stock b16 rods. lightened and balanced crank, and complete rotating assembly. 7 pound Fidanza flywheel. and everything will be dyno tune with CROME.

My goal is to reach 190 or more wheel horse power.

which of these cams will benefit me more. or should i just trow in some buddyclub spec 3's that my brother has.

any info would gratly be appreciated.

 

The xx version of the cam is designed for the 1.8 and larger motors. The M22x your particular motor would kill a BC3+, it's a much larger profile and is going to carry power very high....making a damn quick B16!

 

so X would be the way to go.

 

Yes sir!

 

can you explain how why there are cams that are designed for 1.8L or higher.
what characteristic make it for 1.8L .

 

You can use it on a 1.6 and make power power. Just not as optimal as a 1.8 is.

Think of it as getting a size M shirt when you wear a S. IT will fit, but is a little big.

 

Sorry to thread jack...so would you reccomend x, or xx for a B16b

 

X.

 

so x would be the preffered pick for us b16 guys....now we know.

 

no one actually explained why the xx is better for a 1.8 and x is gd for a 1.6... Is this because the xx has a larger primary lobe so the extra torque of the 1.8 would be better as the 1.6 could lose power in the mid range???

Has the XX got a higher vtec lobe or is it the same and the only difference is in the primary lobe???

 

X is good for a 1.8.

XX is good for a 1.8 with more compression. More headwork doesn't hurt either.

 

ok BUT WHY???

 

how do the xx compar to the skunk2 stage2's sorry dont wanna jack your thread but people are wondering and i thouhgt i would ask thanks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by J1A1H &raquo;</TD></TR><TR><TD CLASS="quote">ok BUT WHY???</TD></TR></TABLE>

With the xx version having two large primaries, it typically takes more compression or larger displacement to make more power with them than the regular x version. With the xx cam in a small B16, you would probably get a kinda of "bogging" sensation in the midrange.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2001B18C1GS-R &raquo;</TD></TR><TR><TD CLASS="quote">how do the xx compar to the skunk2 stage2's sorry dont wanna jack your thread but people are wondering and i thouhgt i would ask thanks</TD></TR></TABLE>

The M22x is a bit larger than the S2S2.

 

M22XX and M22X have the same secondaries. Only the primaries are different.

 

So the M22x in a b16b would be perfect as the b16b has a little higher compression compared to a b16a and so therfore would perform perfectly.

 

so with 11.4-11.7 compression gsr motor built not bought endye pistons 4.2 cc portflow head eAGLE RODS ETC ETC WHICH CAMs either m22x or m22xx or skunk2 stage 2

 

For all the people asking why a particular cam is better for a larger engine, to make it real simple, think in terms of 2 individual cylinders each with a valve on top. One is 100cc the other 150cc. When you open the valve, do you think the 150cc cylinder is going to want to lift a little higher, and be open a little longer to fill properly? Yes. It will still "work" with the 100cc valve, just not as well.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by J1A1H &raquo;</TD></TR><TR><TD CLASS="quote">So the M22x in a b16b would be perfect as the b16b has a little higher compression compared to a b16a and so therfore would perform perfectly.</TD></TR></TABLE>

Correct, especially with a Toda header and a stack.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2001B18C1GS-R &raquo;</TD></TR><TR><TD CLASS="quote">so with 11.4-11.7 compression gsr motor built not bought endye pistons 4.2 cc portflow head eAGLE RODS ETC ETC WHICH CAMs either m22x or m22xx or skunk2 stage 2 </TD></TR></TABLE>

Comes down to personal preference. Both the S2S2 and the M22x would be a good cam for that motor, but I prefer the M22 and I honestly think it would make more power.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Combustion Contraption &raquo;</TD></TR><TR><TD CLASS="quote">For all the people asking why a particular cam is better for a larger engine, to make it real simple, think in terms of 2 individual cylinders each with a valve on top. One is 100cc the other 150cc. When you open the valve, do you think the 150cc cylinder is going to want to lift a little higher, and be open a little longer to fill properly? Yes. It will still "work" with the 100cc valve, just not as well.</TD></TR></TABLE>

Thankyou.

 

hi clean rice,

Since were are at this topic, my friends race all motor B16A with CTR pistons and milled ported head making about 12:1 comp made about 208whp@8600rpm with the TODA Type C. They looking at building another motor next year with upgraded bottom end with some lightweight rods and forged piston with similar 12:1 comp and planning to change new cams that can make more peak power till maybe 9200-9500rpm but do not want to lose too much mid-range torque of the Toda Type C. Initial plans were to run some S2 Pro2+. Which RM22x or 22xx would be better for this race motor and how would it compared to the Pro2s cause i can't find much info on RM cams spec.

Thanks.

 

When you guys rebuild the motor, are you staying with the 77 crank? If I made 208 whp out of a B16 I don't think I would change a thing! Props man

 

Yeah, 77 crank cause its race regulation to maintain stock stroke. Tuned wit S300j on 100 octane race gas.

We also thought we made great power but on the race track we were just losing out right power at 8500-9500 when compared to the other top 3 cars, and you can guess why cause our current peak at 8600rpm and power start dropping at about 8800rpm.

Race season is just over now and my friend is now looking at building a fresh motor for next year race season starting at April with better forged and lighter bottom end and better cams.

 

Simply dropping the M22x's in that motor, power should peak around 9,200 depending on what intake and header you guys are running.

 

current setup on ITR intake but restricted 60mm CTR thorttle (race regulation on 60mm), Mugen 4-1 header.

Thanks for your advice, will contact should my friend wants the M22x.

 

Can you run velocity stacks? Can you port the IM?