cb2280 great cam with hydros

[Paul Lee]

Wow you'd almost have to run lpg to make those big trips worthwhile over there. I visited Holland about 10 yrs ago and was constantly getting in the way of bicyclists... silly toerist, hehe. Thanks for filling me in about the guides, and all the other stuff.

Cheers,
Paul

[hellllli]

1 US gallon is 9,60 USD here in holland (unleaded 95). LPG is almost 1/3 of that price

You don't have to do the searching about the intake guides... they are the same. Just the (previous) rebuild heads I had laying around had longer guides

Yes stock 69 crank

Joop

That would be about 1.74€/litre...

[Pascal]

I echo Rocky's warning to mic out any new cam before using it. We did see a run of bad CB cams, with base circle dropouts that will make hydro lifters impossible to run on that cam, solid lifters will run but may be noisy because clearance will be inconsistent around the base circle.

I just checked my 2252 cam that I bought a couple of years ago and it has .003" dropouts or dip right before the ramp starts on 3 lobes and .0015" on the other lobe. I checked my old worn out cam and it had no dropouts. So is this one of the bad batches? Has anyone else experience this? Will it cause me running issues on my waterboxer with hydro lifters? Thanks

[pocketrocket]

I check every cam I sell or install on a test set of v-blocks with small round point tip on a dial ind. I go aroung each lobe and have found some cams that I would not use. After a freind installed a 2280 cam with dual 40mm dcnfs we could not tune out the problems. Tore the engine down installed a differant new cam and the engine runs great. I would beware of any cam without testing it first. Rocky

[Pascal]

Thanks Rocky. Here are some picture I posted on the Samba to show what i measured.http://www.thesamba.com/vw/forum/viewto ... 43#6449543

[tencentlife]

I see you've been ill-served on the Samba, not surprising. We made this pretty clear here already but I'll illuminate. A cam's base circle has to have a very constant radius. This matters for plain lifter valvetrains inasmuch as valve lash should be constant off-ramp, because if you happen to set lash while in a dip then it will be too tight around the rest of the base circle and it could cause a valve to be held off the seat as temps change. With hydros it's guaranteed trouble, the lifter always expands under oil pressure to take up any available lash, so when it extends into a dip it then has negative clearance on the rest of the base circle, which is a fancy way of saying the valve is being held off the seat.

You can live with such a cam with plain lifters by being sure to set lash away from the dip, or by setting to account for the dip. If the dip is more than .002" I don't think you would ever be able to live with it using hydro lifters. We typically see base circle radius varies less than .001" on good grinds. Apparently no one over on the Samba has ever miked a cam, but they certainly have active imaginations to make up for it.

Short version: you can't run hydros on the cam you have. Period.

[pocketrocket]

I along with tencent have spent many hours of R&D on finding the best cam we feel has ever been made for a hydro waterboxer vanagon engine. We would not have had this cam made if we did not test it to see it was truly the best. We both own and drive Vanagons and use our vanagons as test beds for many products we sell in this industry. Any time you put forth effort into getting better over all performance that time can not be given away. We do not give out numbers on the cams we sell, as our R&D is not free. What I can say is if you want the best running Vanagon the cam I sell is the one. The cam is brand new not a regrind. It has smooth idle, great bottom end and supper power at the range this van is driven . The cam must be used with 1.25 rockers and swivel feet. We always use bolt together shafts with this cam. Each cam is checked to make sure it doe's not have the problems that other cam makers have had. I get calls and emails asking me about the new cam and what I say is buy one you will like it. Thanks Rocky

[buildabiggerboxer]

so many folk just throw the cam in, we used to get bent ones fairly often in the 'early days' of re ground cams, seems much better for now. keep up the good work..

[syncrogreg]

Just wanted to give some feed back on Rocky's/Chris's cam. I had a cb2280 in my 2.4 high comp wbx. It did have fantastic torque down low. Enough to chirp 16" A/T Tyres but was loosing power in the mid 3k range. I have now swapped cams. This one pulls very hard from just below 2k right up over 4k. Essentially the green zone of the vanagon tacho. Just where you want the power. Having bought bits from Chris and Rocky I can also tell you guys they are great to deal with. Can't wait to hit the muddy tracks this season with my new found power. Thanks Guys

[tencentlife]

Glad you're liking that Greg. It's a sweet cam aint it?

[pocketrocket]

Thanks Greg, Chris & I have worked hard to build a cam that works as good as this cam. Costs are higher but the outcome is what we were looking for all along. No off the shelf cam can even come close to this cam. Thanks Again Rocky

[syncrogreg]

Well worth the extra expense Rocky and nice clearancing job too, Thanks. Sweet it is Chris. I now have a powerful and reliable syncro to hit the mountains with and do you know what the best thing is it ain't got no stink'n subaru engine!