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Tue Dec 27, 2011 10:49 am

I currently run a custom dual lobe engle cam in my 2074 engine installed in my bay window panelvan with a FK43 grind on the intake lobes and FK7 grind on the exhaust lobes.

Here is my complete engine configuration (sorry a bit long to read):

Case: AS41 mag case full-flowed bored for 94 mm cylinders.
Crank: 78mm Flat4 4340 Chromo, all VW journals, AA 36 mm Chromo gland nut.
Flywheel: 200m stock weight VW forged, 8 dowelled.
Clutch: KEP Stage 1 & ACE copperhead disc.
Chinese damper pulley (the black one)
All balanced separately and together
5,4" I beam rods, Clevite77 bearings.
Pistons & liners: AA Performance 92mm Thick Walled matched weights.
Camshaft: Custom Engle camshaft started from a Scat SC1 blank sent to Engle to have it machined FK43 intake/FK7 exhaust.
Lifters: Scat lube a lobe SLR reground.
Scat Manton Thin Wall chromo pushrods.
Bugpack 1, 4:1 rockers turned out to be really 1.5 ratios (.570 measured intake valve lift, .520 measured exhaust valve lift)
043 Steve Tims Stage 1 heads CB big Beef matched manifolds.
9:1 CR, 0.047" deck height, chambers enlarged to 57 cc without step.
30mm oil pump, Berg pressure relief steel full flow cover.
CB thin line sump
A1 1"5/8 stainless sidewinder exhaust
Pertronix billet dist., with ignitor II, 45000V 0,6 ohm Pertronix Flame Thrower II coil, Pertronix 8mm silicone wires, second strike ignition box, NGK BCP7ET spark plugs
Two Dellorto 40 DRLA carbs, 36mm homemade CNC billet vents.

I just ordered some Tims Stage 2 heads with matched bugpack 1038 manifolds, and I plan to install 48 DRLAs to make it a little hotter.

Do you think my actual cam is enough or could it be a cool idea to swap it for an FK8 or an FK44 cam (My lifter bores are not bushed)? CR should stay at 9:1, remember the engine is installed in a bay window bus.

Main use is hot street driving, some occasional strip action, and one or two long travels a year.

Waiting for your ideas

Bye

viNce

Tue Dec 27, 2011 11:20 am

I would keep the 1.4(1.5 ) on the exhaust,and go to a 1.33 on the intake. or get more loft on the exhaust.you want all the gasses getting out, so the chambers stay cooler.but with that said how&what does it do now? or yes you could change cams&possiably rockers,my 1.4's check between 1.5&1.57 depending on the lobe lift.the same style rocker in a 1.25 checks out at 1.31-1.33 depending on the lobelift.(geo also plays a part there too) I would change sumps Unless you have a clearance issue.not sure about the stage left heads,only seen a set of stage 1.5's and wsent impressed.for the $$$ I would go with a cb cnc head, or mofoco ported(depending on who &how they get ported&add biger valves to the already big seats&make them work),(thats if I was buying a ported head,I do my own & redo the cnc heads)buts thats me,I not a fan of round ports, but depending on the app& what you have to work with may dicktate that.& dont care for the taller round ports either.it slows down the flow,(V lost in the city&stumbling around)speed it up.

Tue Dec 27, 2011 11:35 am

Hi.
In my opinion if your 48DRLA with vents.42, then perfectly meets Fк 44 because it realizes the power to 7000 rpm and 48 DRLA vents.42 is projected to 7000 rpm

Tue Dec 27, 2011 3:25 pm

When its for a bus, keep the stage 1 heads. You want torque, not upper end hp. Since you have the rockers, a FK8 cam would do the job nicely. No need to go fancy with the cam on such a motor.
Or sell the ratio rockers and use a regular W110 cam (I have tried a customers 2110 (split bus though) with that set up and 44 IDF´s. It worked a good deal better than I anticipated. (Depending on your gear ratio, you - could - go up to a W120)
9-1 is fine.

T

Tue Dec 27, 2011 3:40 pm

I don't plan long trips or torque driving, that's why I wrote "hot street" bus.

I've a buddy who is running a 2275 with ultra mags, FK10 cam and 48 idfs in his bay and that thing pulls strong even on low revs, so I think keeping cams llike W110 is ok for a heavy westy familiy bus but not for a bus driven for fun ---> http://www.ultimatestreetbays.co.uk/ <--- I'm #32 member in the members list, with the actual engine configuration, wants my engine a bit more hotter with stage 2 42*37 valves and 48 drla carbs.

Ordered the heads bare, but with long (+0.2") valves, will run single beehives, Ti retainers, Alu Smith Brother pushrods, (fixed) and maybe 56g Tool Steel lifters if I change the cam.

Tue Dec 27, 2011 5:49 pm

Vince build that thing like bat outta hell. Go with the fk44 and 9.1cr. Then go race your buddy and blow his doors. With the 48 dells, I'd leave the 40 vents in. If you were running fine with the cr u had it will still run fine at that. Personally I wouldn't use an fk10 in the bus. Too much duration. The fk44 is almost similiar but less duration and what u want. Man its going to be a wicked bus. Show em who's boss.

Mon Jan 02, 2012 11:45 pm

What is the dual lobe cam for ? Looks like catalog says for a resitrictor plate engine . JP motorsports engine uses a FK 45/44 and just screams to 9500 rpm . Is a FK 45/44 a good idea for a hot street 2334 ?

Mon Jan 02, 2012 11:57 pm

that split cam is pretty clever IMO
If it is really needed or not depends on the heads and header, but a lot of setups would benefit from a slightly slower ramp on the exhaust, it won't kick the header as hard at lower-mid rpms, which can help midrange in some engines

Tue Jan 03, 2012 10:35 pm

Will a fk45/44 add low mid power and not kill upper power ? Just looking for a magic cam which does it all .

Tue Jan 03, 2012 10:42 pm

Head port quality, cam, and carbs will determine upper rpm peak. No cam will do it all. The best choice will come close and you will need to make exceptions in one area or the other.

Tue Jan 03, 2012 11:32 pm

the bigger the cam the more potential top end, but you give up low end. A bigger cam is NOT going to get you more low end, I don't care what anyone tells you.

But this also reminds me of a great Samba quote, "What you are looking for is a turbo, not a camshaft", or something like that.

Wed Jan 04, 2012 8:55 am

you can have some of both .but not usualy a lot of both.but that all depends on how much a lot is and where it is, and what it,s in.that can be very different for very different people. cam profile can help with that, thus modern cars use roller cams,better all around.

Sat Jan 14, 2012 9:21 pm

fuguboy wrote: What is the dual lobe cam for ? Looks like catalog says for a resitrictor plate engine . JP motorsports engine uses a FK 45/44 and just screams to 9500 rpm . Is a FK 45/44 a good idea for a hot street 2334 ? I run a split cam FK44/45 in my hot street 2276. How I can describe the power is that it feels like it doesn't go flat, it keeps pulling and pulling and pulling through all gears but I also run a close ratio trans (berg 5) so maybe that's keeping things rolling. Sometimes it feels like it needs a dose of NOS on the upper end because it's got more to give. Guys on the street sometimes ask what the hell you got in there, I just yell out the window a 2-liter. Sorry to the poster I know this doesn't help your question just thought it was interesting you guys were talking about the dual lobe cam.

Sat Jan 14, 2012 9:57 pm

Is your cam FK45 intake and Fk44 exhaust ?

Sat Jan 14, 2012 11:10 pm

The other way around. I remember back in 08' talking with the guys at Engle about my plans for a hot street bug and what was going to be under the hood. I told them I was looking for lots of power down low + strong mid range to pull away from the camaro's, challengers, and the like and Engle suggested this cam. I think they hit it spot on + everyone's help on samba and clf.

Sun Jan 15, 2012 2:56 am

Hi there ,

just discovered this thread ,

eh viNce ,it's gonna be a bad ass bus ! =D>

my vote: k44 and 38 vents in Dells ,first jetting shoot >>160/200/70

i've got 38 vents at home if you wanna make a try ,

about your case lifter bores ,make a stop at home with a set of Rocky's T1 bronze bushing and it's solved 8)

bye

Sun Jan 15, 2012 7:12 am

I'll take that offer eeee deee 8) :wink:

The FK44 along with the heads is on its way as well as , lifters, springs, caps , locks & retainers :wink:

Sun Jan 15, 2012 10:24 am

smkn_vw wrote: The other way around. I remember back in 08' talking with the guys at Engle about my plans for a hot street bug and what was going to be under the hood. I told them I was looking for lots of power down low + strong mid range to pull away from the camaro's, challengers, and the like they suggested this cam. I think they hit it spot on + everyone's help on samba and clf.

whats your compression?

Sun Jan 15, 2012 11:41 am

I'm sort of guessing compression is 9.6:1 with a deck .040". I requested CR 10.5 when I sent my heads to AJ but he suggested 10.0 so I agreed. But when I received the heads they were marked with permanent marker 58.6 cc so I'm assuming but never actually measured just wanted to build the motor asap because they had my heads for over a year but that's another story.

Thu Feb 02, 2012 1:44 am

What factors decide whether to make duration greater on intake or exhaust in a split duration cam ?