How to install FSPP cam 4* advanced?

[robbinsj]

I've got the 250 engine so there is no double roller timing set available. More importantly, there is only one spot for the cam dowel, no 2* or 4* option. My understanding is that each tooth on the gear is about 11* so how do I go about installing the cam with 4* of advance? Somebody please enlighten me. Thanks in advance.
-Joey

 

[StrangeRanger]

An offset key would be one way.
Cutting a second keyway in the sprocket 4° off index to a different tooth and remarking the alignment marks would be another.

More to the point, why would you want to?

 

[addo]

First thing is to verify the present setting. It may need advancing, it may not. Then you have some options, as SR mentioned. Besides those choices, it may be possible to provide new fixing points on the cam, but that would be fiddly and entail cam removal. Maybe redrill the cam gear?

 

[Anonymous]

Good advice from both of those guys.

I think Crane grinds all of their cams with 4* advance built in.
Make sure yours isn't already, also.

Second - - - - Where is it at now? Did you degree it yet, or ar you just wanting to advance it 4* because that is an old hot rodders trick only?


Any machinist with a keyway broaching set can cut a new keyway in the sprocket anywhere you want it to be.
It takes just a few minutes and would be maybe $10-$20 to have done, and that is because of set up time. You may as well have nine keyways cut while you are at it!

 

[robbinsj]

The cam is a new Clay Smith 264/274 112* going into a new rebuild. This is a daily driver and Mike's advice (when he thought I had a 200) was to install it with 4* advance to move the power band down to more where this engine is going to live.
-Joey

PS. Does anybody like Clay Smith, Crane etc. make a cam gear that does have additional keyways cut? If not I think I'll install it straight up since with any luck I'll be pulling it to install one of Mike's new aluminum heads in about 6 months, and maybe the double roller chain for the 250 will be available then....

 

[addo]

You should dial the cam. Members here have reported grinds being as much as 11° off. You need to establish this data before making any decisions on what to do.

 

[Anonymous]

You should dial the cam. Members here have reported grinds being as much as 11° off. You need to establish this data before making any decisions on what to do.

Amen. 100%

 

[wsa111]

My FSPP camshaft degreed in @ 1 degree advance from split overlap.

Just to be on the safe side especially if you are not using the FSPP aussie timing chain & gears. Degree it in, its better to be safe than sorry.

You need to see what you have then make the desision to advance it if is necessary.

To advance or not to advance, really depends on your intended use of the vehicle.

For street with a stock converter & a stick shift with close to stock gear ratios yes advance the camshaft 4 degrees.

If you have a very loose converter or a lot of gear in a stick shift or both you might just want to install the camshaft straight up, if you need the low end torque advance it, if you don't, install it straight up or maybe 2 degrees advanced. William