Which Cam??

[mdjenk]

OK, I've been reading the mannnny threads on cams and choices, and have come to the conclusion that my best route is to ask.

I have a '76 2.0L w/ Euro P/C
40IDF Dual Carbs
050 Dist w/ optical and MSD Ignition
Everything else is stock

The car is basically a daily driver, but would like to do some AutoCrossing. Was planning on using the 86a, but wonder if it's too much for a street car.

Help!!!

[Jason Porter]

163/86b is a great split duration cam. The 86a isn't too much for a street car IMHO. Then again, I've never met a cam I couldn't drive on the street. Drive with the law not being a prerequisite of course!

[Jake Raby]

163/86B requires dual springs and a nice set of heads flowing atleast 70% of the intake out the exhaust... I use a derivative of it in street engines of larger displacement just fine.

For a longer liver with single springs I recommend acam of less than .475 lift.

[Dave at Pelican Parts]

I would think that the 86a and 86b would want more compression than the stock Euro P&Cs would deliver... 8:1 is a bit low for them, yes? They'd probably want at least 9:1 I would think. And in TX, you should be able to get better than the 91-octane crud that we get as "premium" here in CA.

--DD

[Jason Porter]

71 x 94 yields 9.2:1 CR with 0.035" deck and heads cc'ed at 54. That should be sufficient.

[mdjenk]

Well, we might have more gas in TX, but whether it's any better or not I don't know.

I know that I was having pinging problems before I tore it down, but from reading I think the problem is the dizzy, not the compression.

I plan on cc'ing the heads, but haven't gotten that far yet.

[Jason Porter]

You'll need to figure out your deck height, and cc your heads. Everything you decide on your cam is affected by CR, valve sizes, headwork (springs, porting) exhaust, ignition.

[Jake Raby]

Its all in the combo!

[Jason Porter]

That's what I hear. I can't wait to tear my engine apart again and make some more changes>