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Thu Oct 11, 2012 4:42 pm

Looking for a little decision making help. Between the 120 and the 2242 what is the better cam for around town driving and the twice a year blast down the local track? engine specs:
2054
DRD 40x35 dual springs
1.25 rockers
8.9:1 comp
1 5/8" header
dual 45 Dells
chromoly push rods

Thanks fellas

Thu Oct 11, 2012 4:59 pm

Between the two choices Id do the W120 w/ 1.25s. However, I think a W125 might be better since Darren is doing your heads and aim around 9.2.

Thu Oct 11, 2012 5:55 pm

Although the CB2242 has 298' advertised duration, the dur @ 0.050" # will tell you more about the rpm range of the cam, and at 248' it will act more like a W110 than a W120. And I agree with Jfats; do the W125; you'll be glad you did.

Thu Oct 11, 2012 6:46 pm

I used a 125 in a customers motor. It was slightly bigger 2275 and had unported 42mm intakes in 044 heads and 9:1. IT was a good cam around town and had great snap when you got on it hard

brad

Thu Oct 11, 2012 7:47 pm

soooo... how will the motor behave if the 125 was too big? could the wife take it to the grocery store?

Thu Oct 11, 2012 8:08 pm

Do the fk43...... [email protected] .383 cam lift. With your rockers, lift will be right around .500.......... Remember that 1.25's rarely spec dead on 1.25, most are north of 1.3

Fri Oct 12, 2012 10:13 am

If you wife is going to use the car mostly around town the CB2242 cam will give you good drivability. The rpm range (about 1500 on up) makes it easy to drive in traffic and not have to ride the clutch. The engle 125 comes in about 3000 rpm and is a little "boggy" till it gets there.
Using the CB 2242 cam with 1.25 RR and dual dells the engine will still turn over 6000 rpm when properly set up. The cam is very close to the engle 110. If you are using it in a heavy bug the CB2242 cam will do as well or even better than a engle 120 or 125 in drag racing.

Fri Oct 12, 2012 11:39 am

Very similiar to my build.

I have a 2109 with 44's, CB Los Panchito's and 1.25's. I was running a 120 and just swapped in a 125.

At first I really liked the 125, now I'm wishing I would have stayed with the 120. The 125 really doesn't have much power below 3500, but after that it really screams. But...I don't like how high you have to rev it to really haul the mail. I can tell it's going to be hard on parts, mainly valve train components. 7500 RPM is no problem for this cam, and unless you have the parts to support that abuse, plan on some breakage.

Even though my engine revs higher with the 125, I don't really feel like it makes that much more power.
It reminds me of my old 2 stroke dirt bikes, nothing for a few seconds them WHAM....off you go.

I also find myself downshifting alot more with this cam to tackle the hills around my home that used to be no problem with the 120.

For all around driving and something that I would have no problem letting my wife drive I would choose the 120. For something that feels like a V-Tech Honda, then the 125.

Fri Oct 12, 2012 11:41 am

Talk to both Engle and CB about your set up/their camshaft. They will tell you what they think is best. They know way more about their products, then we do.

Fri Oct 12, 2012 1:09 pm

68bugbaja wrote: Talk to both Engle and CB about your set up/their camshaft. They will tell you what they think is best. They know way more about their products, then we do.

Dude, they are both competing companies. Theyre both going to say their cam is better.

Fri Oct 12, 2012 1:20 pm

jfats808 wrote: 68bugbaja wrote: Talk to both Engle and CB about your set up/their camshaft. They will tell you what they think is best. They know way more about their products, then we do.

Dude, they are both competing companies. Theyre both going to say their cam is better.

I was thinking the exact same thing.

Fri Oct 12, 2012 4:29 pm

Looks like the 120 is the better option if indeed the 2242 is closer to a 110 than a 120. I had a 110 in it already and it didn't give much on the top end. I ran a 15.1 @88mph with the 110 and am hoping the 120 will get me into the 14's. Then i will be happy.......until i want to go faster.

Fri Oct 12, 2012 6:54 pm

with the Fk43 you can run 1.4's if you ever decide to upgrade your heads......

Fri Oct 12, 2012 9:02 pm

Quote: Talk to both Engle and CB about your set up/their camshaft. They will tell you what they think is best. They know way more about their products, then we do.

I meant ask CB what they think about this 2054 motor with a 2242 cam, then ask engle about the same motor with a w-120 in it. They may say that a different cam will get better results for your set up.

Sat Oct 13, 2012 7:59 am

Whoops! I goofed. The 2241 is closer to the engle 110. The 2242 is about the same as the engle 120. :oops:

Sat Oct 13, 2012 8:29 am

hooker wrote: Whoops! I goofed. The 2241 is closer to the engle 110. The 2242 is about the same as the engle 120. :oops:

Look at the dur @ 0.050" #'s; they will tell you more about the rpm range of the cam than the advertised duration will. I remember once reading (by someone who knew what they were talking about; sorry, I don't remember who) that there's not really any substantial airflow until about .050" valve lift; some call this the effective duration (or the dur @ 0.050" #). Engle's W series has about 40' between the advertised and @ 0.050" duration figures, which I'm guessing is a good compromise between performance and longevity. This is why Engle's VZ series is so hard on parts; an approximate 30' difference between advertised and @ 0.050" figures, giving these cams fast, fairly violent ramps that make lifter tracking on the cam difficult with VW diameter springs.

A number of CB's cams have longer (and I'm guessing gentler) ramps, with 50' (or more) duration difference between the 2 figures. The 2242 is more like the W110 (248 vs247') whereas the 2241 (240') is between the W100 (236') and W110 (247')

Sat Oct 13, 2012 3:06 pm

The 50 thou figure is actually known as the checking duration. If you look at the lift/crank angle curve, you will notice there is a fairly sharp curve at the start/end, then a fairly straight line until the curve starts rounding off at the top. As to what point effective flow starts, you will find a few opinions on that - from 15 through to about 200 thou - it depends on what you think of as effective, and the characteristics of your heads and engine.

Anyway, the 50 thou is chosen for checking the cam as it is on that fairly straight portion of the curve, so will be more accurate. Because this is available, we often use this to discern how radical the ramps are on a cam.

Unfortunately, this is not always accurate - the classic being a "cheater cam." A cheater cam uses very aggressive ramps to achieve maximum lift sooner, then has a dwell at "Maximum lift" (though not completely flat, that would be impossible) before a similar closing ramp. Due to the extreme ramp on such a cam the little sharp bit at the bottom of the curve has to extend a little further and be a little rounder (hope you can picture this.) If this were not the case, the cam would slap against the lifter on the opening and the lifter would slap back down on the cam on closing.

So, if you compare the advertised and checking durations on a cheater cam, it will actually look a lot milder than it is. A similar scenario applies to some high lift cams designed for 1.1:1 rockers.

Have I confused things? It would be great if cam manufacturers would give us more detail on their cams, but they are worried we might compare them to the competition then buy from the competition...

Sat Oct 13, 2012 3:23 pm

Quokka- While you are right, there is a lot more than what I wrote, sometimes you've gotta keep it fairly simple....

Sat Oct 13, 2012 8:16 pm

Well that was a lot to digest. Kinda get it..kinda. I was wanting 120 or a hair more so it seems like the majority says w120. Engle lifters or CB ultralight 2 piece? then i'm done. Thanks

Sat Oct 13, 2012 8:31 pm

Just when you thought you had it figured out----

the FK-43 is more agressive
the web 110 is smoooother
OR why go with one of DRD's 298 cam to match the heads?

:P
CB lightweights are good with the engle or web cams, DRD uses the hard blanks and scat lifters I think