What rocker arm ratios do people see? Options

[stugray]

I am adjusting the valve geometry while putting in a Raby 9700 cam and I am seeing .38 on the exhaust cam lift and .496 at the valve (an exh rocker ratio of 1.3) and I have a .39 on the intake with a .546 at the valve ( an int rocker ratio of 1.4) is this what everyone else gets for rocker ratios:

Intake rocker ratio = 1.4
Exhaust rocker ratio = 1.3

These are the 1.7 (1.8?) rockers that accept the 911 swivel feet.
I am using the swivel feet, have modified the rocker faces, adjustable push rod, and zero lash to do the meaurements.

Do those rocker ratios look like stock?

I want to take 50 thousandths off the Combustion chambers to increase the CR, but my measurements say I wont have enough clearance on the Intake valve once I shave off 50 thousandths.

I only have ~0.075 clearance now from the piston to the Int valve as it is with a deck of 0.030 and everything else (crank & rods) stock - flat top 96mm pistons.

That Intake valve travel of ~0.55 looks huge to me. Anyone else care to comment?

Stu

[stugray]

Jake

I have promoted your hardware often, even after "the tirade".
I tell people that "If Jake sells it, it is the right part".

There are cases where you can get the same parts elsewhere, but the point I made by posting was that "sometimes" Jake does things that others dont. And perhaps we could learn from the differences.
In this case I was poining out that your parts appear to be superior to others.

Even your tech articles and videos (I have paid twice for your engine video) are the bibles for what we are all trying to do here. I do not contest that.

Me not running the rocker studs in all the way is my fault and no-one elses.

Stu

[Jake Raby]

Jake

I have promoted your hardware often, even after "the tirade".
I tell people that "If Jake sells it, it is the right part".

There are cases where you can get the same parts elsewhere, but the point I made by posting was that "sometimes" Jake does things that others dont. And perhaps we could learn from the differences.
In this case I was poining out that your parts appear to be superior to others.

Even your tech articles and videos (I have paid twice for your engine video) are the bibles for what we are all trying to do here. I do not contest that.

Me not running the rocker studs in all the way is my fault and no-one elses.

Stu

Maybe its just me, but this quote doesn't quite seem like "promotion" of my products:

After explaining that I bought a "Raby Cam package.." His exact quote was "Oh not another Raby Victim!".

That said I have no issue with the guys at FAT and never have. They are very good competitors and they are the only guys that you'll ever hear me say that about in this industry. That said, they are our competitors and they love to have a prior customer of mine call on them, just like we love it when their prior customers call on us. Thats part of taking pride in what you create and offer over the "other guy".

That said, what I find absolutely hilarious is the one person who offered a ton of expert help on this topic is a person who had NEVER set valve train geometry in his life until **I** spent an hour on the phone with him walking through every step required to achieve max lift and perfect geometry simultaneously. Doing that was like trying to lead a mule through the forest.

Anyway, all the things that happened, happened and I don't regret them. That exchange proved a lot of things to me and I made big decisions that have made life easier here. Like I said, it looks like you are now on the right page and heading toward success. Glad to be on a civil level with you now and we'll continue to agree to disagree.

Now I am thinking I made a mistake. Could I have purchased a cam and tappets from you? I thought you didn't do that no more. Would've if I had known.

As much as I'd like to close the store and not deal with it, I have an employee who has been the Manager since it opened, and she needs the job. If it wasn't for that, the Type 4 Store would not exist and we'd only sell engines, the way we used to back when life was easier, more fun and less stressful. Selling things at retail is about the worst punishment I have ever created for myself.

This post has been edited by Jake Raby: Apr 4 2013, 05:48 PM