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Thu May 03, 2012 4:54 am

Hi,

Has anyone compared the FK8 and the 2242 cam? To me the numbers look very similar with 1.4 rockers.
I have a 2242 cam in my garage but I'm not sure wether to go with that or maybe the FK8. The spec of the rest is:
76x94
CB044 40x35.5
between 9.5 & 10.5 comp (not sure yet)
44mm idf's
Empi Hide Away exhaust or a Mondo mufler (not decided yet either)

Thu May 03, 2012 7:53 am

post the specs so we can see the diff.all the specs, sometimes cb dont give squat for cam specs on the card.why would they do that??

Thu May 03, 2012 8:27 am

Your heads need to have some nice port work to utilize the fk8 cam. As far as the cam choices, I think that's too much cam for standard 044 roundports. I would trade up or sell and buy a cam more suited for your head choice. Otherwise step up the heads. Minimum panchitos, super plus with oval port work, or bigger. My take.

Thu May 03, 2012 10:36 am

jfats808 wrote: Your heads need to have some nice port work to utilize the fk8 cam. As far as the cam choices, I think that's too much cam for standard 044 roundports. I would trade up or sell and buy a cam more suited for your head choice. Otherwise step up the heads. Minimum panchitos, super plus with oval port work, or bigger. My take. the fk8 will work with out any head work as does all cams but more power& better running can be realized with good port work.I ran the fk8 with deburred(mild port work) mofoco 042 heads in my 1874 and it ran great.but as with all cams it depends on the entire package.if you think one will be to big then go with the smaller one for ease of mind.

Thu May 03, 2012 11:28 pm

CB runs the 2246 cam in there 2109 in the dyno sheets and it makes 154hp with the cnc roundports. It's a 314 adv dur and 260@ .050 dur cam. .513 lift with 1.25 rockers. I think the K8 would run fine. I just installed the 2246 cam and the cnc roundports on my 2109 and she sounds healthy. After memorial day weekend I will have more info on how well she runs campared to the the fk42 and my old 044 heads that were ported by bugpatch. The single springs in my old heads were not enough to prevent valve float so I went with the dual springs and the cnc roundports specificly because of the dyno sheet that CB shows. So far I am happy but thats just in the garage.

Thu May 03, 2012 11:47 pm

mark tucker wrote: jfats808 wrote: Your heads need to have some nice port work to utilize the fk8 cam. As far as the cam choices, I think that's too much cam for standard 044 roundports. I would trade up or sell and buy a cam more suited for your head choice. Otherwise step up the heads. Minimum panchitos, super plus with oval port work, or bigger. My take. the fk8 will work with out any head work as does all cams but more power& better running can be realized with good port work.I ran the fk8 with deburred(mild port work) mofoco 042 heads in my 1874 and it ran great.but as with all cams it depends on the entire package.if you think one will be to big then go with the smaller one for ease of mind.

Mark,
The OP has not stated if the standard 40*35 roundport magnums has been opened up, ported, or anything else than the standard 3 angle CNC porting. Any cam will work with any heads, but at what range and what performance level. I suspect that if he did run the cam with no additional port work, that it would have a very low rpm threshhold. Basically too much cam for the heads.

Remember dyno is one thing, no load straight pull. With 314 duration mid to upper range rpm is where you get that power in car.

Fri May 04, 2012 6:32 am

on a head with little or no port work that has a longer duration cam put in will see an increase due to added valve open time, yes the amount of cfm( air )will still be restricted but it is letting it in longer.thus flowing more into the cylinder for more power.you can go to far and loose the lower end torque if you go too big I dont think either of those cams are too big for that cc motor. my 1874 with fk8, had a "fluff&buff" for the first 6 months with a single bugspray carb, it ran pretty good. then some good port work, ran better, , then duel bugsprays, even better,the end castings&small carbs were holding it back. then duell 44 hpmx's and the motor realy came alive . the heads are now wedgeported and on my 2028 with a cam thats a good bit more lift than the fk8 but within a degree or 2 duration.(cb 2250)
it,s like filling a bucket with a watter hose.fill it for 10 sec see how much you get , then fill it for 13 sec and see how much you get, the hose still has the same flow rate.

Fri May 04, 2012 6:51 am

Looks like I'm sticking with the 2242

Fri May 04, 2012 10:52 am

The FK8 with CNC round ports makes 140 - 145ish hp. With IDA´s and a perfect set up I have seen 152 hp. on one occasion. That´s about what they can deliver with street cams.

Do you have the cams you ask about ? If not, take a look at the CB 2288 (K8) Thats a very nice cam.

T

Fri May 04, 2012 2:24 pm

When did the OP say that he had cnc roundports? The stock O44's have as cast ports, and then get cnc'd to roundports or ovels ect. With stock, as cast heads I think the heads are too small for the cam, but with the cnc round ports not so much. Would the cams run with the stock O44's? Yes. Would it run optimum? No. So I ask, are the heads as cast or ported?

Fri May 04, 2012 2:33 pm

KopfenJager wrote: when did he say that he had cnc roundports?

Well he didn't specify...... However I referenced round ports in my first post up above and there was no reclarification nor a correction to it. If it is super plus magnum oval ports, then Hell yes I feel that cam is in optimum performance range capability.

Fri May 04, 2012 2:50 pm

Indeed, I think witch O44 heads he has makes a huge difference. I doubt they are ovals with 40mmx35.5mm valves, I bet they are as cast stock or maybe the cnc roundports. We can wait and see what the OP says.

Another question would be if he has dual or single springs? The cnc roundports with dual springs would be good up to 160hp and would be a good match to either one of the cams listed, ovals even better. Standard O44's with single springs would not allow either cam to work. Throw a set of dual springs on those as cast O44's and they would run, but no where near optimum.

Fri May 04, 2012 3:51 pm

optimum,?? for what?? well you can just keep porten till the end of time till you find that one, there are so many variables that one is going to be hard to find.and is that peek hp?brod hp?brod torque?or just a happy guy in a car that runs pretty darn good. the better the head the beter it will run.but what is better head?kinda like witch is better cam.location,location,location,cc,weight,carbs,intakes,headers,driver,car,cr,all of witch play a part.

Fri May 04, 2012 4:06 pm

Well we kinda wanna give him the best advice able now don't we. "Slap it in, it will run" doesn't cut it for me. If I give out a particular suggestion, its what I would do in that given example. You know optimum...best favorable operating in all conditions... Last thing Anyone wants is to tear down something because he/she wants more. Especially after spending time and money to get it done and Redone. And they always want more. I've said my piece. Slap it together.

Fri May 04, 2012 4:19 pm

WEB-CAM 86B :D In my experience the FK8 is an ok cam but the 86B WEB-CAM is a much better cam over all in my opinion and I have dyno sheets that say it's a far better cam for your set up. Thanks

Sun May 06, 2012 8:37 pm

post dyno sheets

Mon May 07, 2012 2:27 am

the heads are stock but will be ported before they are going on the engine. Not a big porting job but matchported with the intakes and shaving all the edges from the casting.

Mon May 07, 2012 10:25 am

Sorry. My bad on the CNC thing.

On another note, I agree with Chico. The 86b is a very good cam for medium to large cc street engines. My personal choice would be that or the CB.
Not that the FK8 is a bad choice, I just like the other better.

T

Mon May 07, 2012 2:56 pm

still 044's flow better than stock VW heads and some mild porting will only make them better. I don't think you can go wrong with any of the cams. I don't have any experience with webcams, but have had good luck with CB and Engle cams.