Just thought I would let you guys know that there is a guy on z31 board who has made cam gears for our engines dont know how much benfit you would get with out dyno tuning. What are some your thoughts?for VG engines only sorry Ve owners

 

It is alway beneficial to have this adjustment..that's one reason DOHC engines are great..the seperation between intake and exhaust valve action and their relationship to the piston position can be adjusted providing significant power gains. Especially in turbo applications. For SOHC engines, it is a little different, actually a bit easier to tune because one variable has been eliminated, the relationship between the intake and exhaust valve action. Unfortunately this would really help a turbo car, but being able to tweak the cam's position in relation to the piston can do alot. This is alot like "degreeing in the cam) on a pushrod engine. This is done mainly to make up for machine work on the block and heads. I say go for it. Of course, a dyno would be necessary for tuning, but it would be well worth it if you are going through all the effort to turbocharge a maxima!

 

Sounds good. I bet we could use an adj. cam gear for the exhaust side. Intake cam is already factory adjustable.

 

That's cool. I didn't know that. Someone who has there VE all modded up and running tip top shoudl get some dyno time and try adjusting hte intake cam. How hard would it be to section the timing cover to make it accessable? You could section it, put tabs on the upper part to make it removable.

 

This is for vg's only Jeff

I would be interested, depending on the price. Male- when you say that this is used to make up for machine work on block and heads, do you mean that it is less beneficial on an engine with block and head work?

 

if you can get info on them we'd appreciate it...

 

He's selling them for $100, but decreases the price for each set of gears that you send him. I emailed him, so he might post over here. No dynos yet, I didn't even read that any had been installed.

 

NO no, what I meant was that when you mill the heads and deck of the block, you change the cam/valve timing (shorten the distance between the cam and the crank..what drives the cam). The tensioner on the T-belt can make up all of the slack that would now be in the belt (as long as too much hasn't been removed from the surfaces), but since the distance has changed, so has the timing of valve action in relation to the pistons. This can be rectified by using adjustable cam gears. This affect is the reason why it is generally a bad idea to mill our heads and blocks..only the minimum needed to make everything nice and flat. The fitment of the intake manifold where it meets the heads also becomes an issue too.

 

Ahh, thanks
What exactly is O-ringing the block- I have heard good and bad things about it, and does it affect this distance you're talking about?

 

That's when you machine a groove in the block around each cylinder, then you use a head gassket that has a ring on it that sort of drops into that groove. I'm not 100% sure if the same can be done to the head side, but it adds strength to the seal between the block gasket and head. Good for high boost, NOS and high compression engines. The only drawback I can think of is that it might effect integrity of the block, but I'm not sure about that. What negative aspects have you heard of?

 

Morgan does post here sometimes..?

Check out his FS post in you guessed it, the classifieds section(under the name biskit)!

 

he's posted here and did a writeup under the f/s section on the cam gears....




http://forums.maxima.org/showthread....hreadid=163666