2270 bus cam

[Rustcollector]

Hi,
I previously asked a question on a 2270 build but was probably a bit too vague as I didn’t get many answers.

I’m building a type 4 2270 for my late campervan and am stuck on choosing a cam

Has anyone experience with one of these builds and which cam did you choose and are you pleased with it.

Thanks for any help

['77 Westy]

You need to give the engine spec and where you want the engine to be strong to advise what cam might suit your needs.

I have a Scat C25 in my 80x96, 2316cc with 1800 (41x34) heads and Weber 40 IDF carbs, 9:1 CR. It’s fine pushing a heavy Westy up mountains, however Scat quality is sketchy and if I were building the engine today, I’d us e a Web Cam, probably an 86 or 73/86.

['77 Westy]

What happened to the type 4 store 9590 cam that you said you had in the other thread? Incidentally, the Web 73/86 has similar specs.

['77 Westy]

I don’t know if the view counter is correct but it looks like there have been over 10,000 views but only one with an opinion for a cam suitable for a bus engine. I know that most Americans don’t like anything other than stock capacity, stock cam and very low compression but I also know that there are many others with larger capacity engines pushing a bus along. Anyone?

[Piledriver]

The motor in my Vanagon has 11:1 CR... but its also a 3.6L water cooled 6 cylinder with DOHC and 4 channels of VVT. That was my "fix".

Busses are hard on engines, especially Westys, and it's hard to keep a stock engine alive, much less a bored out stroker, so a mild cam, tight deck, with perhaps a little more compression is about as far as anyone is willing to venture.

Its not that no one cares, its just that few if anyone else went there and has an opinion or data to share.

[Clatter]

Run into threads like this all of the time.
Someone claiming they’re going to build this big bad bus.

Sure, there are ways of making more power with a bus motor,
But at what cost?
Not just build cost but reliability and engine life.

Here in the US we have desert temps and long high-speed mountain climbs.
Contending with the Duramax crowd the whole time…

Even at 1971ccs, stock heater boxes can be limiting once you have bigger valves, more cam, etc.


Building for more displacement- yet choking the motor with stock heaters is going to cause the heat to stack up in the heads.

More power is more heat.
Oil coolers don’t cool heads.

Pushing a loaded bus in high gear at high speeds is a battle of CHT.
More displacement is going to simply hasten the demise of your engine.

Only someone ditching heaters and going with nickies is going to have a chance of running more power long-term.

Few VW people are willing to make that commitment.
Especially late bus people..

So it becomes a moot point.
Nobody who comes onto the forums claiming they’re going to build this big bad bus motor actually is going to do what it really takes, unfortunately.

/rant