URGENT HELP: dailing in 4age Wade and HKS cam

[wiso]

I thought I had a handle on how this was done but opening my engine I have discovered a massive hole in my theory.

I am trying to dial in the cam to the card settings to start with. looking at the cam cards I have noted the settings on my dial wheel. with this in mind all the treads on how do to this say when the engine is TDC the intake and exhaust lobes on cylinder 1 should be pointing at each other.



I have wound the engine to TDC and my lobes appear to be pointing away from each other, I don't know why the car ran fine, just not real potent using the cams on standard gears.



the crank gear notch lines with the dimple on the housing, the original gear dimples line with the backing plates. the intake notch is up and the intake pin is up and exhaust pin is down. all aligned perfectly with the BGB specs.

now my problem is, using the settings on the cam cards, for the exhaust if I wind the crank backwards to 38deg before BDC where is says on the card the lobes on number will be facing upwards no where near about to open the valve, by the close point at 0deg (tdc) the lobes are just about to touch the valve seat. Same problem for the exhaust it almost as if the cams are 180 degress out, but I would have thought if thats the case it would not have run.

Can some one help here urgently?

thanks

http://img80.imageshack.us/i/872a.pdf/

[fixeruperer]

you need a dial gauge man, not cable tied verniers. dialing cams is so precise, that a few thou can make a massive difference on crank degrees.


what method are you using to dial in the cams ?


have a geez at this..
http://www.skylinesaustralia.com/for...s-t240804.html

[wiso]

thats not the question mate, the question is should the lobes be pointing the other way (into each other at TDC) right now they are pointing away from each other, meaning that all the settings on the cam cards won't work.

that was just for double checking TDC on the crank, I have a bracket made to do the valves, just CBF on the crank, TDC is dead on toyotas factory marks afterall

[jazae86]

For a basic timing on 4AG: Crank onto Odeg mark, cam wheel dimples line up with cam cover backing plate markers.

This means the lopes face AWAY from each other .
In your first picture you are on TDC if the crank is also at 0.

Dialling cams is extremly time consuming and frustrating. To do a good job and be confident that my numbers are correct, I can take 3-5 hours of turning the motor over and writing numbers down.

Without adjustable cam wheels I don't see why or what you are adjusting.

Also, only turn the motor over in direction of rotation. ONLY!
Reading numbers turning the motor backwards negates the timing belt tension from exh cam wheel to crank pulley.

[wiso]

ok, so let me get this straight....

all the guides on the net for doing 4age's state that when at TDC you should wind it direction of rotation (clockwise) 110deg (a rough figure) and this would be the most open point of the valve (intake).

but if the cam lobes face away from each other when you rotate the crank 110deg the lobe is point up, so is this right? or is it when you time the intake you rotate the crank backwards (so to speak, I know you said don't do that), and when you do the exhaust you rotate forwards in its normal running direction?

[oldcorollas]

if you rotate the crank another 360deg, the lobes will be pointing toward each other... (cams move 180deg)

always rotate the crank forwards.

[V-Na]

One cycle is 720 degrees crank angle. So there are two TDCs per cycle.

If you turn the crank over 360 degrees from where it is in your photo, you'll be at the other TDC. More importantly, each camshaft will rotate 180 degrees and their lobes will point towards each other.

[wiso]

ok, yeah I sorta figured that out after sitting there for a while looking at it, int he write ups every body talks about having the motor at TDC, I have always seen TDC as head and block, but then I realised it was just crank at TDC.

also the other thing I stuffed was my positioning of my open and close of the EX and IN, on my degree wheel.

So hopefully that should be sorted cheers for the help guys

[TERRA Operative]

so hang on, how are you dialling in cams with stock, non adjustable cam pulleys?

[wiso]

I am not, I pulled them ones off and put adjustables on. its been a big day

[TERRA Operative]

ah, I see. No worries, continue as you were.