Hey guys,

I am trying to set my ignition timing on my t2 engine that is swapped into a 85 rx7. I am using the front cover from the 85 and its crank pulley. I can not get the timing marks lined up.

What can i do? can i set the engine up to find tdc and make my own mark?

I am sure someone has an answer

Please help!

 

if u swapped the pulleys using the 4 10mm bolts, that's ur problem. it will go on any of 4 ways. swapping them wasn't really necessary. u'll need to get the engine back to TDC and then remove and reinstall the pulley with the mark at the pointer.

 

As long as the pulley, hub, and cover are all off the same engine you should be ok. I am running a first gen cover on an REW with no problems. On a side note, you cant swap pulleys and hubs, they are a matched pair and there are differences even in the same series (IE you cant take a pulley of one first gen hub and put it on another first gen hub).

 

Well i thought that maybe the pulley was in the wrong position. I tried clocking the pulley every way although it only wanted to bolt up one way. Could i use a t2 pulley with a 1stgen front cover? or will the mark on the cover not match the mark on the pulley due to the cover and pulley being from different year rx7s?

As far as i know the pulley,front cover, and hub are all from the same engine.

I will tell you another interesting bit of information...

When i check the timing with the timing light my marks are 180 degrees out from the pointer. Do you think there is some type of parts incompatibility?

I may try finding tdc and making my own mark although i want to be 100% accurate. I will just use my dial back timing light to find my degrees from there.

 

assuming ur timing light is on leading(bottom) plug of front rotor, if the mark is 180 off then u should be able to take out the 4 bolts and turn it 180 and bolt it back up. i've never dealt with T2 engines before but i can't see there being much if any differences in the timing mark location on the front cover.

 

As previously stated make sure you are on the #1 rotor leading (lower) plug. The timing pointers are in the same spot on the 1st gen and the 2nd gen so as long as your 2nd gen pulley and hub are a matched set the marks should be correct. What ignition system are you running? I am guessing you are checking the timing because it's a new build or it's not running right. Make sure the CAS is stabbed correctly and make sure the coils are connected to the correct plug. If the L1 and L2 are crossed your marks would be 180degrees out. I got tired of second guessing my timing marks so i bought a RB pulley and made this fixture so i am sure without a doubt now.

 

The L1 and L2 are wasted spark for 86-2002 13B engines. They fire at the same time.

 

Good point! I have been messing with direct fire for too long!

 

i'm guessing since this T2 engine is going into an fb, he's using a dizzy.

 

yes my timing light is at the bottom plug. I am going to try using a snap on timing light rather then my equus timing light to eliminate that as a problem. I have tried moving the pulley 180 degrees, but it only wants to go one way. Does this suggest anything in terms of what mix match of pulley and hub i am using? I am questioning if the hub is really off a gen 1 since this swap was done 2 years ago.

I am using a gen 1 front cover and pulley. The only thing i am slightly uncertain of is the hub. I am thinking that its possible it could be the hub since i am not 100% certain it is a gen 1.

I am running t2 ignition coils which are controlled by a mircotech. I am checking the timing because the engine seems to be under powered.

I am thinking of buying the rb pulley and this would eliminate my doubt of the hub being different. It would be a good referance for timing marks. I am not sure why exactly you have that white circular peice behind the pulley?


I am using a cas since i am on microtech

 

The white piece just moves the mark closer to the pointer for accuracy. If the microtec is setup for waste spark the light should flash at both 0 and 180. If you can lock the timing and split set it at 5 ATDC and 0 degrees split and you should be able to set the timing off the trailing plugs. I hope that makes sense, that way it should only flash the timing light once per revolution instead of two times (leading waste spark).

 

I have ordered the racing beat e-shaft pulley just to be safe that my timing marks are on 100%!

I tried a few tdc tricks although i want something more definate.

i will keep you guys updated!