More shopping for cams:

[thechadzone]

So I have another set of cams that I'm considering, and I'm wondering if they'd be appropriate for my motor.

The cam's specs are:
Lift: 10.75
Duration: 285
Checking Height: 0.5
Center Lobe Angle: 110
Valve Clearance: 0.35/0.40

Engine Specs:
2.0 w/1.8 head & Dual IDFs

I'm looking for a performance commensurate with a spirited trip on the mountain highways that run between my house and the Oregon coast about 70 miles away. Thoughts and suggestions are much appreciated. I'm also wondering how hard it'd be to convert to a block mounted dizzy...

[thechadzone]

Pardon my responding to my own post, but I've done some research in the archives, and is it true that the stock block mounted dizzy will not fit motors that use the IDF "Waffle" manifold? What about one of those fancy electronic dizzys from the '79 Lancia Beta?

Any other ideas for using a block mounted dizzy with the Waffle manifold?

[mdrburchette]

I don't believe you have the proper clearance for the waffle manifold with the block mounted dizzy. There was a PBS manifold designed for the block mounted dizzy but they are hard to find.
As for the cams, they sound close to the 42/82 cams I'm running in my 1608 and my little car is a billy goat when it comes to mountain driving. You can really feel them come in around 3700 rpms but I haven't seen a drop in low end torque like everyone thought. I do have a boat load of money in lightened components that might have compensated for it.

[engineerted]

I would keep the stock exhaust cam thus keeping your cam mounted dizzy and run with the hp intake cam. The performance gains of running both of those cams with out a higher CR are nil. I would also recommend the adjustable cam pulleys and play with their timing.

Is this for a Spider? One of those cam is for a lancia with the end dizzy drive, WTH?

Ted

[maytag]

Is this for a Spider? One of those cam is for a lancia with the end dizzy drive, WTH?

Ted

Not to hijack this thread.... BUT:
TED... that is FREAKIN' AWESOME that you know this stuff!
I'm always amazed at some of the detail that some of y'all can pick-up on.

And now: back to your regularly scheduled thread.

[thechadzone]

Thanks so much for the answers. I also thought of just running the intake cam, and I like the idea of adjustable cam pulleys to get the most out of it.

So there wasn't a dual carbed Twin Cam Fiat with a block mounted dizzy back in the early days? Weird... I suppose putting a big bowl full of gas right above an electrical device isn't the best idea?

BTW, I think these cams are another set from a rally spec Fiat Ritmo from the early '80's.

[So Cal Mark]

I'll agree with Ted about the compression. We really need more info about your motor though; what's the c/r? are the valve size and ports stock? what exhaust system are you using?
IMHO, if you have to use a stock exhaust cam, you haven't chosen the right intake cam.

FWIW, my new distributorless ignition is a block mount and fits under our IDF manifold

[manoa matt]

Mark, is their a ploted advance curve for that distributorless ignition? I saw on the website that it reaches 18 deg at 3000rpms, what happens above 3K?

[thechadzone]

Thanks for the response. My motor is stock except for the IDFs and 1.8 head. I have a nice hand made (not by me) header that I plan on installing at some point... With its current C.R, (whatever it may be with the 1.8 head swap) would I be better off to go with a different cam profile that would make installing a matching exhaust cam more worthwhile?