rx7vadim

The marks on pulley i think r off. it has timing marks close to shaft key.
when first tried to fire the car , i put the shaft in tds (shaft key at 9 0'clock possition) then i stabbed cas. with this setup the car wont start. i had to resab cas retarding it a bit in order to start.

how can i fix this issue?

rx7vadim

i need to find out how to make new pulley timing marks so that i could time it with timing gun. right now the car losses power after 4.5 k rpm

FC3sinfiniIII

Does it loss power or it will not rev pass 4.5krpm?

rx7vadim

lose power, it revs no problem

HAILERS

Something like this:http://members.optusnet.com.au/~onec...-%20part%20one

And the lined paper, dividers, square (not shown), pulley hub and pulley itself shown in the jpgs attached.

My pulley is 114.8 in diameter. So I made a circle that diameter on the lined paper.

My pulley hub inner diameter is 30 mm. So I made a circle that dia inside the bigger one.

Then make a perfect cross thru that circle.

Take your HUB and lay it on the inner circle with the engine side of the hub resitng on the inner circle. Make the keyway of the hub lie on the cross hairs of the cross you made Middle of the keyway area directly on the line.

So you know that TDC will be 90 degrees from the middle of that keyway, so if you take your square and go to the top of that circle where the cross hair is cutting thru the circle, you can put the square on that line and make a mark on the pulley that is attached to the hub. I didn't explain that very well but just look and you'll figure it out. By using the square I mean stand it on edge aligned with the crosshair so it's square with the pulley and then make a mark on the pulley that will now be TDC.

Once you know where TDC is, and you should by now, then you just use a little pie are square to figure out how far off the TDC mark you need to go to find five degrees ATDC.

When I write this I assume you already knew the pulley should only go on one way because the pulley holes are offset and the pulley only goes on ONE WAY. UNLESS the holes have been wallowed out and then the pulley can be put on a variety of ways but the timing marks will be WRONG.

Aaron Cake

iTrader: (1)

The timing on these cars is fixed, and the pully only goes on one way. Line the engine up so that the timing pointer is on the leading mark (rightmost mark on the pully if looking from front of car). Pull the CAS and remove it's top cover. Line the pointer mark on the bottom of the CAS shaft with the DRILLED mark on the gear. Do NOT line it up with the split pin that holds it in place. Using your thumb to hold the CAS rotor from the top, restab it while only allowing a SLIGHT BIT OF MOVEMENT in the rotor to get the gear set.

With the CAS adjusted approximately to the middle, the timing should be close enough to start and run the car. Then warm it up, set the initial set coupler and set the final timing.

HAILERS

IF the holes in the hub are seriously wallowed out...............buy another used hub for your series engine.

And just in case......the timing marks WILL be biased towards the keyway. In other words the marks will be to the keyway side of TDC, but only 5 and 20 degrees ATDC.

rx7vadim

thx hailers, i understand more now.
i went and got s5 pulley, so the holes r not whollow out, but for some reasong the marks on pulley are too close to shaft key. ur trailing mark on pic look to be at about 11 o'clock, mine is at 9:30 oclock(weird). maybe the hub is s4 from my old engine.

rx7vadim

with the shaft at tdc and cas stabbed properly the motor wouldnt fire, which is another issue

rx7vadim

i dont know if leading coil has big effect on starting. Right now this coil is dead

rx7vadim

ok everything is lining up, last q i have, with the pulley off there is a dimple on the hub , that dimple is aligned with shaft key?

HAILERS

Although I see a *dimple* on my huib, I've not a clue why it's there. I mean the hub can only fit on the shaft one way because of the keyway. Attached a jpg of a series four hub.

I've no idea why your PULLEY marks are not similar to mine.

Is the timing PIN on YOUR front cover in the same place as mine?? Jpg attached.

HAILERS

My 82 hub had a locating stud on it that fit thru the pulley. Shown in yellow in the jpg attached. The lead timing mark on that car is at TDC. Only three of the pulley holes on that pulley will align with a series four hub.