2 degree advance crank gear for model A

[M2M]

Anyone heard of an advanced crank gear? I might be getting my hands on a crank gear with two keyways, one for standard and the other for 2 degrees advanced.

I know Model T guys are using advanced timing gears for improved performance...or so they say.

[Benson]

Bill Stipe sells such a gear for advancing timing...

[M2M]

Originally Posted by Benson

Bill Stipe sells such a gear for advancing timing...

Stipe has an advanced cam gear or crank gear? I'm talking about a crank gear.

[Y-Blockhead]

Bill Stipes' is an adjustable cam gear. which IMO would be more practical than a fixed crank gear. Adjustable up to 8°. advance or retard.

But if you are getting a 2° crank gear for a good price, I say go for it. May want to degree in your cam to check where you're at?

[BRENT in 10-uh-C]

Yeah, as I recall it was made in the 50's by Winfield (-or maybe it was in the 60s by Bell or Harvey Crane).

As you probably know, advancing the cam will bring in more low-end, so they were probably a good thing back when all you had $$ for was a reground 'B' cam. Stipe has already factored that in for their IB series cams.

[Benson]

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Originally Posted by M2M

Stipe has an advanced cam gear or crank gear? I'm talking about a crank gear.

Ok sorry ... this one is a camshaft gear

[duke36]

Would it be helpful for those with a high compression head ? The Stipe's
gear can set advance or retard.

[wmws]

Can someone explain what an advanced crank gear is for.

[Patrick L.]

Originally Posted by wmws

Can someone explain what an advanced crank gear is for.

Post #5. Advancing valve timing increases low end power/ lower engine speeds. Retarding it helps with top end/ higher RPMs.

[wmws]

Post 9. Why not do that with the cam gear? Tell us M2M why use the crank gear to advance the timing?

[Werner]

Hallo!

just turning the camshaft advance has only no more power.

It is better to spread the valve open angle time overlap. But even that only brings more performance / advantages at high RPM.

Concluse: No performance possible.

[M2M]

Originally Posted by Y-Blockhead

Bill Stipes' is an adjustable cam gear. which IMO would be more practical than a fixed crank gear. Adjustable up to 8°. advance or retard.

But if you are getting a 2° crank gear for a good price, I say go for it. May want to degree in your cam to check where you're at?

Yes, that's my situation, I can have a new advanced crank gear at a good price...but...(see my comments below)

Originally Posted by BRENT in 10-uh-C

Yeah, as I recall it was made in the 50's by Winfield (-or maybe it was in the 60s by Bell or Harvey Crane).

As you probably know, advancing the cam will bring in more low-end, so they were probably a good thing back when all you had $$ for was a reground 'B' cam. Stipe has already factored that in for their IB series cams.

What would be the result of using a 2 degree crank gear with a Stipe IB330?

I was planning to use a Stipe 330 cam ($450), but since I've come across this gear I wonder if I should regrind my existing cam and save money? Will a reground with a advance crank gear more or less equal a Stipe?

[Patrick L.]

Originally Posted by wmws

Post 9. Why not do that with the cam gear? Tell us M2M why use the crank gear to advance the timing?

You can. Usually the change is made thru the cam gear, but, it can be done either.

[Patrick L.]

Originally Posted by Werner

Hallo!

just turning the camshaft advance has only no more power.

It is better to spread the valve open angle time overlap. But even that only brings more performance / advantages at high RPM.

Concluse: No performance possible.

Not true.

[johnneilson]

At best an opinion
Winfield sold offset pins for the cam gear
If I remember they were 4 or 5 degrees

Honestly in such a detuned motor you would not see much gain
There are other things that make a larger gains

[40 Deluxe]

Originally Posted by johnneilson

At best an opinion
Winfield sold offset pins for the cam gear
If I remember they were 4 or 5 degrees

Honestly in such a detuned motor you would not see much gain
There are other things that make a larger gains

Have you done dyno tests to prove your idea of not much gain? Sometimes small changes such as cam timing can make a big difference. Sometimes big changes only make a small difference! You never know until you try.

[johnneilson]

40,

no, I haven't tested 2 degrees of timing change, I typically see a difference when making a 3-4 degree change.
I have had 4 degree change make a 10% difference at a specific RPM. That brought the HP up to just under 150 with a siamesed intake port flathead motor.

In all honesty, I have never done a cam dial in on a stock motor, I don't know what the accumulated tolerance would be, maybe Brett has an idea. If the tolerance was +/- 1 degree then a 2 degree change would probably not make much difference.

Just my $0.02, stay safe, John

[Jack Shaft]

'Its a long way to the top if you want to rock n roll'

if there was a short cut to fast everyone would do it

[Jim Brierley]

I doubt if 2* would make enough difference on a stock or mild engine. Stock Model T's have their cams quite retarded compared to A's and all other more modern engines. This was more common in the early days. Stutz did the same thing. Those days engineers were still learning about the new-fangled gasoline engines.

[M2M]

Originally Posted by Jim Brierley

I doubt if 2* would make enough difference on a stock or mild engine. Stock Model T's have their cams quite retarded compared to A's and all other more modern engines. This was more common in the early days. Stutz did the same thing. Those days engineers were still learning about the new-fangled gasoline engines.

Jim. What would be the result of using a 2 degree crank gear with a Stipe IB330