Cam specs for all major aftermarket brands

[CFM-Z440]

I wanted to pile up all the data I could get my hands on for comparing all avaliable cams for the Z. Our other thread comparing cam data has gotten a bit muddy.



First the stock cams for the Z/KFX/DVX...

I have conflicting reports on these cams.


From the other topic on this site:
IN .334" lift 227* dur. LCL not known
EX .323" lift 243* dur. LCL not known
I believe these to be the 03-04 style.



From Greg @ CWR:
IN .338" lift 235* dur. @ 105* LCL
EX .373" lift 248* dur. @108 * LCL

I am believing these to be the 05-08 style but I am speculating. I will edit any changes I find out.



Stock DRZ cams...
S/SM Model IN .334" lift 227* dur. LCL not known
S/SM Model EX .323" lift 243* dur. LCL not known

E model IN .351" lift 227* adv.dur. LCL not known
E model EX .366" lift 243* adv.dur. LCL not known



Hot Cams...

The old style Hot Cams (no longer avaliable):
IN .377" lift 243* dur. @ 0.040" 107* LCL
EX .377" lift 243* dur. @0.040" 107* LCL



The former new style stage 2 Hot Cams:
IN .377" lift 243* dur. @ 0.040" LCL not known
EX .358" lift 238* dur. @ 0.040" LCL not known


The new style stage 1 Hot Cams:
IN .358" lift 238* dur. @ 0.040" LCL not known
EX .358" lift 238* dur. @ 0.040" LCL not known



Yoshimura Cams:

IN .354" lift 236* dur. LCL not known
EX .366" lift 242* dur. LCL not known
I do not know if the Yoshi specs are advertized duration figures, or other. I will edit the changes if needed.






Web Cams 03-08 models:

631/294 Grind
IN .343" lift 250* adv.dur. (224* @ .050) 106* LCL
EX .322" lift 246* adv.dur. (220* @ .050) 104* LCL

293/536 Grind
IN .360" lift 248* adv.dur. (226* @ .050) 106* LCL
EX .378" lift 268* adv.dur. (244* @ .050) 104* LCL

288/293 Grind
IN .368" lift 260* adv.dur. (234* @ .050) 106* LCL
EX .360" lift 248* adv.dur. (226* @ .050) 104* LCL

288/540 Grind
IN .368" lift 260* adv.dur. (234* @ .050) 106* LCL
EX .384" lift 272* adv.dur. (248* @ .050) 104* LCL

540/539 Grind
IN .384" lift 272* adv.dur. (248* @ .050) 106* LCL
EX .400" lift 280* adv.dur (256* @ .050) 104* LCL


09 + models:
288/293 Grind
IN .368" lift 260* adv.dur. (234* @ .050) 106* LCL
EX .360" lift 248* adv.dur. (226* @ .050) 104* LCL






Megacycle Cams...

IN 327 -x9 .385" lift 248* at 0.040" 104* LCL
EX 327 -x4 .370" lift 252* at 0.040" 108* LCL


IN 327 -x5 .427" lift 257* @ 0.040" (252* @ 0.050") 103.5* LCL
EX 327-x10 .385" lift 252* @ 0.040" (246* @ 0.050") 108* LCL


Cycle Works Racing Cams...

Trail Cam
IN .351" lift 227* dur. @ 0.040" LCL not known
EX .366" lift 243* dur. @ 0.040" LCL not known

Speed Cam
IN .385" lift 248* dur. @ 0.040" LCL not known
EX .370 lift 252* dur. @ 0.040" LCL not known

Mach 1
IN .427" lift 257* dur. @ 0.040" LCL not known
EX .385" lift 252* dur. @ 0.040" LCL not known

Mach 2
IN .440" lift 260* dur. @ 0.040" LCL not known
EX .400" lift 255* dur. @ 0.040" LCL not known


Ron Hamp Cams (RHC)...

RHC 187: Web 943 grind with the intake retarded 1 degree
IN .356 lift 277* adv dur. (257*@ 0.050") 108 LCL valve lash 0.006"-0.008" (Thank you wheatz for the correct information)
EX .356 lift 277* adv dur. (257*@ 0.050") 104 LCL valve lash 0.009"-0.012" (Thank you wheatz for the correct information)

RHC 208: (Web 208 grind)
IN .407" lift 280* adv dur (258*@ 0.050") LCL not known
(I dont know if they offer an exhaust cam also for this grind or not. I have not even seen the 208 advertized)

All Data here is subject to change. If anything is not correct, PM me and I will get it edited. Keep in mind that duration figures will look bigger as advertized than they do @ .040" or @ .050" tappet lift.

Also if anyone has some real world specs that I can add, PM me and I can edit them in.

This is for comparison sake only. Many of these cams require different valve springs or other things, so do your own research before buying or installing.

[ridin434]

So... There is a difference between stock 03-04 cams and 05-08 cams... I have spent a lot of time looking this up...

[CFM-Z440]

There was a difference, but a slight one. They also added a throttle postion sensor in the later models.

[CFM-Z440]

Originally Posted by jkill351

So im not real technical but can turn a wrench and have a book. Im taking a class in school this fall and want to rebuild my 03dvx. I already have a yoshi full stainless and a k&n with outer wears and no lid that got jetted at the dealership when i got it installed (dont know the jetting). Out of the huge aftermarket which cam will work best? Im torn between getting both int and exh as most only recomend intake for woods. I do understand that int will make the most diffrence until i get a big bore but thats coming soon. Also sence ill be in there already what other mods should i do? Other than getting my flywheel machined and head work. Any help would be greatly appreciated. Thank you

There is no "best" set of cams. Your whole setup and what type of riding you do, plays into which set will work best for you.

In general, and there are exceptions, bigger cams will make more high rpm power and less low rpm power. The opposite is also true, Smaller cams will make more low rpm power, and less high rpm power.

For example, a guy riding supercross needs more low rpm power and thottle responce than a dune shooter. The same goes for engine displacement. A stock 400cc 11.3:1 engine wont run as well with the largest web cams, as it would with stage 1 hot cams. In a high compression big bore stroker, you would find the opposite.

There are more variables involved than I could ever have time to type.



The only cams I know of that were intended for just changing the intake cam, were the origonal hot cams which are no longer made.


As far as your other questions go, you will need to start your own topic. This thread is for camshaft discussion.

[smokedya2]

why do some cam combos have a larger intake cam then exhaust cam (like the mach 1+2), then others have larger exhaust cam then intake cam (like yoshimura and web cams)?

[cataway]

because some one some were had a bright idea as to what would work , call webcams and ask how many different grinds they make for the ltz/drz ,its alot

[zookie400]

cam profiles that favor the exhaust work really well for forced induction.

[cataway]

Originally Posted by rcfan

talking to burned (eddie) he said with the extra weight of the z and not wanting it to be a high rpm motor, be cause i ride so many tech trails he said i would have more bottom thru mid with the 540s vs his where it would be middle to very high rpm upwards of 10k, dont really ride where i need the extreme rpm like drag racing does.

i question whether Eddie really has any real experience with the ltz, he's the man on the drz , yet a bike and a quad are two different animals

my self i have power all over the place and i have ridden WV HM trails and had no problems what so ever.

Ron has said a 440 build is the smallest build the RHC cams will work on

[CFM-Z440]

Originally Posted by cataway

i question whether Eddie really has any real experience with the ltz, he's the man on the drz , yet a bike and a quad are two different animals

my self i have power all over the place and i have ridden WV HM trails and had no problems what so ever.

Ron has said a 440 build is the smallest build the RHC cams will work on

Hey cat, do yo know if rons duration specs are adv. dur or at .040 or at .050? Or can you find out? That would really put it in perspective for us all if anybody knew. It makes a big difference

[rcfan]

i really wanted the rhc cams but after talking to eddie and what he thought about cams he said he thinks the 540 setup would be best but he did say he has really very little experince with the ltz he was giving me his suggestion,and i thought about what he said and how diffrent cams reacted on the dyno and decided i have nothing to lose if i try the 540 540 if i dont like it ill order a 539 or put the 540 540 in the wifes bike and order the rhcs. wish we could take one motor and a basket full of cams and dyno each set 1 after another if the dang dyno wasnt so expensive!!

[kfxguy]

Originally Posted by cataway

i question whether Eddie really has any real experience with the ltz, he's the man on the drz , yet a bike and a quad are two different animals

my self i have power all over the place and i have ridden WV HM trails and had no problems what so ever.

Ron has said a 440 build is the smallest build the RHC cams will work on

I agree with you Al. Some of you guys need to take into consideration that the ltr450 makes more power on average than the Z, yet the motors are so similar it's not even funny. The ltr was made to be even more compact than the z which they made the head slightly shorter in height, and in my opinion might hinder it somewhat more than the z. I know some of the components are swapped to the other side and the cams ride on roller bearings on the chain side vs. The z cam rides in a oil pressurized journal. My point? Look up common cam specs for the ltr and youll quickly notice on average the cams offered are larger. I wonder why? I have ported a couple ltr heads and a few z heads and I can tell you the port design and chambers almost mirror each other.

[CFM-Z440]

Originally Posted by kfxguy

I agree with you Al. Some of you guys need to take into consideration that the ltr450 makes more power on average than the Z, yet the motors are so similar it's not even funny. The ltr was made to be even more compact than the z which they made the head slightly shorter in height, and in my opinion might hinder it somewhat more than the z. I know some of the components are swapped to the other side and the cams ride on roller bearings on the chain side vs. The z cam rides in a oil pressurized journal. My point? Look up common cam specs for the ltr and youll quickly notice on average the cams offered are larger. I wonder why? I have ported a couple ltr heads and a few z heads and I can tell you the port design and chambers almost mirror each other.

I think a little of that might be because the LTR is a higher strung engine out of the box. The Z or DRZ in stock form has it's peak torque lower in the rpm range. The Z/DRZ is meant to last quite a bit longer as well. It wasnt designed as a race bike.

With LTR/RMZ the whole setup is high rpm oriented.

I think a lot of the differences between a hiped up Z and an LTR's out put come down to the rotating mass and a little more research going into the LTR

[kfxguy]

I guess my whole point is yes usually an ltr makes more power and one main factor I would give credit to is in general use of larger cams. Just my .02. I've just noticed that with a big bore stroker you can run alot larger cam than you think. Look at cataways bike for example, he's got a good setup and large cams and he makes over 55hp. Just sayin...

[CFM-Z440]

Id like to know how yoshi hit 50 with those little bump sticks they sell lol

[smokedya2]

Originally Posted by CFM-Z440

Id like to know how yoshi hit 50 with those little bump sticks they sell lol

im curious of that myself, which makes me believe that i have alot to gain by going with a bigger set of cams, just cant decide which ones