'93 GSX CAS and 6-bolt swap

[mach4g63t]

I just swapped in a 6-bolt swap that's ready to fire up later tonight. I used the CAS off my old 7-bolt motor 'cause it wasn't cut. Before I start this thing up, or attempt to, doesn't the CAS need to be set in a particular way? If so, what way and how? I tried looking, but maybe someone can point me in the right direction?

This is a 93 GSX with 6-bolt motor and 93 CAS. So, it's still a 1g wiring harness.

 

[Spln_Hrd]

It is possible to be 180* off. Install it and if it pops and back fires, flip it.

 

[DIS1KRAZY]

I think road race has it on there website

 

[1qkfwd]

I know on the 90-92 with the green top cas that you have to set the line on the sensor on the opposite side that the dot on the casing is. Does that make any sense?

 

[16gpoweredgsx]

I know on the 90-92 with the green top cas that you have to set the line on the sensor on the opposite side that the dot on the casing is. Does that make any sense?

I thought thought the 90-92 cas's had to be line up with the mark on the casing.

 

[jhague]

I just did the same swap. I just put mine in and got lucky that I had it in the right way. Just leave it loose and turn it to where the car will start and run, and then once it's warmed up set your timing.

 

[Talesin]

At TDC, the head has a dot which will be visible through one of the 'grooves' on the end of the intake cam. You just rotate the CAS's flange until the lined side is on the same side as that dot.

I usually don't bother though. It's easy enough to just put the CAS in, fire it up, then flip it around if it doesn't work. Two bolts, and it doesn't hurt anything to try... just wastes a little gas. Setting the timing to 5 BTDC takes longer and is more of a pain in the butt. Which is to say, none at all.

 

[1qkfwd]

I thought thought the 90-92 cas's had to be line up with the mark on the casing.

Woah thats weird. I had to look that up. You are right on that but for some reason my car is not like that. I flip mine around the way I explained and the car just turns over. Theres a major mix up in my wiring.

 

[mach4g63t]

Okay, so I got my motor running and twisted the CAS until it 'caused the idle to speed up so that the motor will stay running at it's own power without any starter fluid. Now, however, the engine is misfiring... kinda sounds like a Subaru WRX or the likes... does this mean I have my CAS in backwards?

 

[steve]

The CAS can only go into the cam two ways, correctly and 180 degrees off.

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Follow the procedure for setting the base timing to 5* BTDC. Make sure that you are really grounding the pin for the timing adjust connector and not the plastic guard and that you have disconnected any datalogger (grounding pin 10 on the DLC at the same time will set the BISS adjustment mode not timing adjust mode)

 

[mach4g63t]

The CAS can only go into the cam two ways, correctly and 180 degrees off.

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Follow the procedure for setting the base timing to 5* BTDC. Make sure that you are really grounding the pin for the timing adjust connector and not the plastic guard and that you have disconnected any datalogger (grounding pin 10 on the DLC at the same time will set the BISS adjustment mode not timing adjust mode)

Appreciate the help, but that makes no sense to me. Can you dumb it down? I know that it only goes in two ways and I know how to make it 5 BTDC, but what grounding pin for the timing adjust connector?WTF

--Edit--

Oh snap! I got it now! I had to stare at the diagram for a few minutes. Hahah, thanks, Steve! I'll definitely try that out.

 

[steve]

I know how to make it 5 BTDC, but what grounding pin for the timing adjust connector?

If you know how to set the ignition timing then you should know about the timing adjustment terminal.
http://members.shaw.ca/dsm.1000q/Engineprimer/1G/timingconn.htm

Grounding it will put the ECU in base timing adjustment mode where the ECU timing advance it locked to 5* BTDC so you can adjust the CAS to match the mechanical with the electrical.

Grounding this terminal and pin 10 on the Data Link Connector net to the drivers footwell fusebox puts the ECU into BISS adjustment mode and trying to set your timing with a datalogger attached will do this.

The ECU will also drop out of base timing adjust mode if the RPMs are more than 1200.

 

[mach4g63t]

Okay. I was thinking of something else. I was thinking of the piston, not the actual ignition timing. I'll keep this in mind when I'm tinkering here in a few hours. Again, thanks for the help!