camshaft specs

[Patrick L.]

I didn't want to hijack the ring/pinion thread.

Does anyone know the camshaft specs of the readily available regrinds ? And how do they compare with Bill Stipe's 'B' 330 camshaft in drivability ?

Basically what I'm wondering is if the regrinds are Model B or how close they come to them. And, do the regrinds have any wear issues.

If the regrinds are available in 'B', then is the cost of one of Bills worth it ?

[Pete]

Originally Posted by Patrick L.

I didn't want to hijack the ring/pinion thread.

Does anyone know the camshaft specs of the readily available regrinds ? And how do they compare with Bill Stipe's 'B' 330 camshaft in drivability ?

Basically what I'm wondering is if the regrinds are Model B or how close they come to them. And, do the regrinds have any wear issues.

If the regrinds are available in 'B', then is the cost of one of Bills worth it ?

I can answer some of your questions.

The two most popular ones I do are the 77B and the 1007B.

77B
In 20/60
Ex 60/20
.320 lift
In .011
Ex .013

1007B
In 20/55
Ex 60/18
Lift .360
255 dur
Rate of lift .008 per degree sq.
Lobe separation 112
In .011 Ex .013

Both of these are better than the "B" cam.
The 1007B will idle slightly higher than stock. About 550-600.
The 77B idles stock and smooth.
Both of these will run on one inch diameter lifters.

Regrinds have no more wear issues than stock.

[MikeK]

Originally Posted by Patrick L.

Does anyone know the camshaft specs of the readily available regrinds ? And how do they compare with Bill Stipe's 'B' 330 camshaft in drivability ?

The "driveability" question is not so black and white. Your idea of driveability may be like it was in 1929- very slow, almost lugging bottom end and snail crawl idle. Not much happening above 2500 rpm. Others consider this undrivable in modern traffic and opt for more mid/top range at the expense of the parade slow bottom end performance. To really answer your question you need to be more detailed in what you want. Even Henry realized traffic was changing and went to a different cam for the B, hence Stipes "IB" (Improved B) series.

Pete definitely knows cams, and his Isky 1007B suggestion fits a different "driveability" definition than what was in 1929. That cam will really need a downdraft or twin ups to shine. The mid is great because the valves accelerate quick, but (my opinion only) it is definitely lopey on idle, especially in a long stroke I-4 like an A.

My own idea of driveability is not like what any original A, B, or "IB" cam will give. My fav is Stipe's RR340 (not the IB340).

[nick c]

MikeK, could you tell us which one of Stipe's regrind cams are similar to the RR340?
thanks nick c

[MikeK]

Originally Posted by nick c

MikeK, could you tell us which one of Stipe's regrind cams are similar to the RR340?
thanks nick c

Probably none, as the RR340 kind of fills a hole between the IB340 and a 3/4 cam. To get a real answer, you should ask Bill Stipe himself.

[d.j. moordigian]

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Originally Posted by Pete

I can answer some of your questions.

The two most popular ones I do are the 77B and the 1007B.

77B
In 20/60
Ex 60/20
.320 lift
In .011
Ex .013

1007B
In 20/55
Ex 60/18
Lift .360
255 dur
Rate of lift .008 per degree sq.
Lobe separation 112
In .011 Ex .013

Both of these are better than the "B" cam.
The 1007B will idle slightly higher than stock. About 550-600.
The 77B idles stock and smooth.
Both of these will run on one inch diameter lifters.

Regrinds have no more wear issues than stock.

Pete,
Are any of these figures @ .050"?.....or, are the event times @
first movement of lifter rise? I've done 50 and 100 for so long, I've
never checked them any way other....Thanks.

[Pete]

Originally Posted by d.j. moordigian

Pete,
Are any of these figures @ .050"?.....or, are the event times @
first movement of lifter rise? I've done 50 and 100 for so long, I've
never checked them any way other....Thanks.

These are checked at running clearance. It's the way most cams were checked in the late 40's when these were designed.

[Patrick L.]

Thanks