[Cardo]

I need to clarify. The cam card says install at 108, and Paul said to install at 106. Brain fart as far the 6 degrees. So 2 degrees advanced of the 108 the card recommends for an install of 106. Sorry about that.

[Formulajones]

Which is 6 degrees advanced.

Keeping in mind installing at the recommended ICL of 108 is already 4 degrees advanced. Technically it should fall in there dot to dot as the cam is ground that way, but that is almost never the case. With crank keyways, cam keyways, and then cam gear keyways and crank gear keyways that all can be off a 1/2 degree or more, you have a lot of stacked tolerances working against you. So dot to dot does not always guarantee the ICL the cam card says it should be. I've had them off as much as 4-5 degrees at dot to dot which means that engine and camshaft is not going to perform as promised.

Couple the fact that Paul dyno's a ton of these camshafts and has inside knowledge working with Brookshire who designed the voodoo lobes. The idea of moving the cam further forward another 2 degrees I believe came straight from Brookshire and confirmed with Paul's dyno testing. This also helps with the intake and exhaust valve relationship they are looking for when the engine is at TDC on the exhaust stroke.

[1968GTO421]

Originally Posted by 455rebel

And, anyone know of a decent machine shop within 100 miles of east TN?

Don't know of any shops close by. Used to be some really good machinists in Asheville in the downtown area in the '50's-'60's but they were all run off when Asheville went "tourist town"

Best I know of is Wayne Sless in Greenwood, SC. He did the engine for 64Speed here and for Caster1 who is on here. I talked with Caster1 whose engine was done in Dec 2018 and he is still very happy with it and no issues.

Here are some links to Caster1's build along with a map link.

http://forums.maxperformanceinc.com/...86#post5973886

https://www.youtube.com/watch?v=0D6C...ature=youtu.be

https://www.facebook.com/pages/Green...43307355715592

https://www.google.com/maps/dir/John...3!2d34.1954001

Rebel, Best of luck to you no matter what you decide on machinist. I,too, am deciding between 703 and 704

[455rebel]

Ok, 2deg, from card seems more like it! I've done that before to tame race cams for the street. We have a couple machine shops bout 30 mile that do dirt track engine work. Their good but dought they have a tq plate for Pontiac. May use them anyway.

[Steve C.]

Might be a long shot but contact BHJ and ask sales if the have sold a torque plate to a shop in your area.

http://bhjproducts.com/bhj_content/contact/

Also try clubs in the area that might know of a shop.

https://www.pontiacregistry.com/find...b/listings.php

Related for interest......

Torque plate distortion evidence:
http://www.pontiaczone.com/forum/sho...d.php?p=347243


.

[Jay S]

Maybe I missed it, but have not seen in your tread where the compression of the engine is mentioned. That will effect the off idle to mid range throttle response, and whether the 703 or 704 is a better choice for the combo. Also effects the advance for each cam

[455rebel]

I havent figured comp?
I'm using TRW L2359F-0.30 pistons, 6x4heads cut .020.
Estimate?

[455rebel]

Around 9.3.
Think I'll go 704.

[steve25]

The milling of your heads and them having a valve job done if such was done is a wash, as in no CC reduction.