Apex Cam timing with head shim.

[WesG]

Anyone have the info for doing the cam timing on an apex with Dave's head shim. Looking for pics/text on how far to rotate the gear. Any tips on installing the shim is also appreciated.


Thanks,
Wes

 

[powderlites]

Apex cam timming

If you leave exhaust cam gear holes stock and grind intake cam to retard it so flange on bolt lines up with outer edge of hole like in this picture. should be very close to 114 degree lobe centers on both cams.
9.32 to 1 compression ratio with Powderlites head spacer.

http://www.powderlites.com/turbokits.html

 

[WesG]

Thanks

Thanks Dave. You are the man

 

[Veedy]

If you have any questions about installing anything turbo related on your Apex/Rx-1 you should buy my install video. The video was shot at Alpine motorsports. It includes a complete turbo install. 90 minute DVD with extras. $20 shipping included. They are free with an Alpine turbo kit !!!

email me at fwp@telus.net

 

[joel0920]

McXpress also have an installation Video where exhaust cam modification is described very easy.. try email mcx and am sure that they can send you one very cheap.

E-mail: info@mcx.se


This installation video is included in the MCX kits for free starting aug-sept from what i heard.

They also have an Installation Video for Phazer under construction..

/j

 

[TWIN TURBO]

Save yourselves alot of time and trouble, I own a superflow dyno and played the move the intake cam back game, and didn't see any change in power maybe some exhaust temp change but no power change. I believe adding a head shim destroys the combustion chamber and yes it does advance the cams slightly like 2 or 3 degrees. If the want to lower compression do it the right way with piston change not head shims. Bigboost requires more clamp force ie. larger head studs to prevent coolant seepage also.

 

[HAMMER]

 

[Turbo Tim]

Save yourselves alot of time and trouble, I own a superflow dyno and played the move the intake cam back game, and didn't see any change in power maybe some exhaust temp change but no power change. I believe adding a head shim destroys the combustion chamber and yes it does advance the cams slightly like 2 or 3 degrees. If the want to lower compression do it the right way with piston change not head shims. Bigboost requires more clamp force ie. larger head studs to prevent coolant seepage also.

Most guys I,ve talked to say the Engine has less lag with the head shim as compared to the low comp pistons and just seems to run stronger and feel more "lively" ......especially with the cam timing adjustment.

 

[TWIN TURBO]

Turbo Tim,
Most guys don't have a clue. Seat of the pants tuning is a joke. You will have to show me that one, the head shim is wrong, really wrong. Besides that the compression is lower with Daves head shim than with Wiesco 10:1 pistons. That does not make for a more lively engine just the opposite.Theirs more to this if what you say is true.

 

[venom]

getting apex mtn boosted to about 240-250 hp.headshim pretty reliable for this hp or is pistons a must.don't want any trouble just ride.

 

[Turk]

I have low compression pistons & extra head gasket running 10 pounds boost average. Sled has great throttle response & wicked holeshot. Works for me!!!!

 

[Turbo Tim]

Turbo Tim,
Most guys don't have a clue. Seat of the pants tuning is a joke. You will have to show me that one, the head shim is wrong, really wrong. Besides that the compression is lower with Daves head shim than with Wiesco 10:1 pistons. That does not make for a more lively engine just the opposite.Theirs more to this if what you say is true.

Mcx and Dave both back up their kits claims with Dyno numbers. I'm not saying the head shim method is better ........................just that it's not a bad option ,like you are saying it is.

 

[TWIN TURBO]

Do what you think is best, I'm kinda new at this building race engines for fourty years and still learning!

 

[Turbo Tim]

Do what you think is best, I'm kinda new at this building race engines for fourty years and still learning!

You must be right then ........I've only been building race engines for 20 years .