anyone running a FK-10 on the street?

[wildman1]

[vince1]

86c is harder on lifter bores than the 46.
_________________
my French blog https://vwpanelvan.wordpress.com/

Click here for my full pix detailed 2165 engine build with beehive valvetrain.

Sorry for my poor English, I'm a French guy ...

[Ken Taber]

Wildman all 3 cams, the fk-10, 86C, and the FK-46 are closse in there specks. I have not run all 3 in the same engine. I have run all 3 in simular engines and they are all very close. John is right about the 86C and Joel Mohr runs a lot of them and really likes it. The duration at 0.050 on the fk-46's that I have tested is not 268 but 271. I have found the fk-46 to be the smoothest of all 3. If I had to pick one of those 3 it would be the fk-46

[wildman1]

Thank you Ken, I appreciate your shared experience.

[mark tucker]

thanks murzi thats nice to have.what engine was the dyno sheet from?how much head work?carbs,cr,cc rockers,valve size?

[yamaducci]

I have run the k8, then k10 and now about to run the 86C in my 2498cc Fuel injected turbo.
I can say after 500 miles and about 5- 1/4 mile runs that the lifter bores were shot and could not hold oil pressure when hot. I have since sleeved the lifter bores among many other mods and expect a fantastic return on power with the 86C.
I think since I have fuel injection it made up for the lack of low end with both cams; however, I think both cams felt similar. The K10's power band had moved up the scale and really woke up later than the K8.
On the highway, all out, the K10 would ramp up around 5000 seemingly with no ceiling.
It is a VERY different animal with the FI, CE Heads and Turbo though.
Down low with the FI, they were both "streetable", frequently running out of gear and needing a 5th.
Not sure if running carbs would make them not-so-streetable.
_________________
-John Cox
My 2498 Turbo Re-Build Thread: http://www.thesamba.com/vw/forum/viewtopic.php?p=5578697#5578697

3rd Brake Light Safety Stars- I still have a couple with blue light left. Email me if interested.

[mark tucker]

I ran the k8 and it as very streatable&mild mannered.

[bilboa]

ken and i built my 2442, clyde 44 x 37.5 heads, 9.1 , 271 @ .050 fk46 , profiled 48 ida's. Don't have dyno sheets in front of me, but on his dyno, 4800 elev , 181 hp, uncorrected. In my heavy street car, berg 5, love the fk46, tons of bottom end, pulls to rev limiter at 7300. On one of my baja motors 87x94 , 44 x 37.5 wedgeports, 7mm beehive springs, fk44. pulled 25 lbs at 2500 rpm, 150 hp @ 6k with only 36 vents in 44idf. with more tuning and better exh, WAY more left in it. Really like the fk 44 too. fk series cams rock. bill

[bilboa]

meant to write that first motor mentioned with clyde 44 x 37.5 hds had a k10. Liked it put prefer the fk 46, but to be fair motor was also stroked from 84 to 88, besides cam change. Second motor, fk44, 87 x 94 motor should read 7mm valve stems, beehive springs. like that cam too. bill

[jeff68]

I run the K-10 in my 2110 (82X90.5). Has 42 X 37.5 CB 044 / Berg 870 CNC / hand ported heads, Berg 1.4 rockers, Dual 48 IDA's. Only 8:1 compression. Engine has nice street manners. Fine in traffic and on the freeway. Pulls hard from 3000 rpm to 7200. Stock geared transmission.

[DarthWeber]

Jeff, are your heads semi-hemi cut? I'm guessing yes. Just wondering what you have your max timing set at with your combo?
_________________

[mark tucker]

any body got the fk 46 card to add to the thread?any .100" or more lift figures for any of these cams?just wondering, wish I had loged all mine good when I did them,if you think my spellen is bad, you dont want to see my riten when ploting a cam.I think most of them got trashed.keeping a dedacted book would be too easy.Im about to go apeshit wanten to finish this hyd roller motor that hasent been hardly started.& now this 44&46 are looking good for a mild street motor, but too much time&$ in this roller cam as it is so it need to be going.(inreality not much $$ at all in it, but I want to use a new aluminum case so thats the $$$ part)all of this info has been good,and if we pay attn to it it can be very usefull.me coming from a 600+ci background ,it's totaly different for the vw stuff with low ratio rockers&Ir induction.

[Steve Arndt]

In the V8 world they give duration at higher lift values on the cam cards. I wish we could get that information in one place for analysis.

[Nater]

[mark tucker]

[bilboa]

mark, my fk46 lift was .630 with my berg 1.45's that measure 1.54 ?? ken has my cam card, gotta make sure on engle cams, some k10's measure 266 or 268, some fk 46s might differ from 271 . ? GREAT CAM... Might want to play with lobe centers in future as ken taber and doug berg just built a motor for johny johnson with fk46 with a 106 lobe center, GREAT results , ken , speak up ?

[mark tucker]

both sets of my 1.4 checked out at about 1.53,and with a .420 lobe they were 1.56, checking without a calculator is a must in all motors.

[Alstrup]

I vote for the 86c too in that cam range. I have used them down to 1914´s and they run surprisingly strong. Of course the combo needs to be about perfect and not have too long gears, but still.
As Alan U stated, the CB 2289 is a much overlooked cam. It works really nice and has more midrange than the 87.
The 40 series I dont care about, apart from the fact that they make good power. They wear stuff out fast. (A few people seem to not have problems. I suspect they are suddenly in for a surprise)

The FK10 was never a popular cam. I´m not sure why. But I actually do think that a certain, now long gone, person had a lot to do with it due to the way he built and advocated street engines. It doesnt work well with 7,5-1 CR.
The FK8 is a "forgiving" cam. It works reasonably well with 8-1 CR and is hot at 10-1 + high octane. If the ports are small it pulls ok numbers, but early. If the ports are actually too large it still makes reasonably good numbers. Going to the FK10 all that disapears and the combo has to be more "correct" to make good power.

The figures/timing on the 40 series, (43-46) are actually rather good. And I do think that if they were ground on a slightly fatter lobe they would be killer cams. Until then I stay with the 86B/C and CB 2289

T

[westy richardson]

[ALB]