Advanced AEM tuning: sequential injection and 48-tooth trigger

[Mr. Y]

Hello guys. I've got AEM 1110 from gixxer750, so no more Haltech for me.

Does anybody run pnp box in sequential injection mode? How to configure AEM pro for that?
What injectors must be enabled (1,2,3 and 7,8,9)?
What about injector phasing?
Do I need ballast resistor to run extra inj. channels. How much ohms? (with 2 Ohm injectors)

And now about trigger. As you know stock CPS is 24 tooth. It has not very good construction (mounted on shaft that is driven via gear from exhaust cam)... A lot of free-play there... So we get unstable timing mark. It bounces 2-3* when checked with timing gun.

I removed stock VR-pickup from CPS and mounted it near intake cam gear. Cam gear is 48-tooth. I reconfigured Haltech for that and got _much_ stable timing mark. I can set ign. timing precisely now!

I don't know yet how stable is timing with AEM using stock CPS, but if there are more than 2* of floating, I'd convert it to 48-tooth trigger. This conversion is very simple and cheap (no extra parts needed, just some mounting brackets).
So.. Can 1110 box be configured to run 48-tooth trigger? How stable is your timing mark on AEM using stock CPS?

PS: Sean, I know you are very experienced in AEM tuning. Please chime in.

[mobes]

You should be able to run the 48 tooth no problem. Just set the sensors to 48 tooth and set your injector and ignition phasing.

[turbo joe]

That doesn't sound TOO "advanced", does it? :D

[Mr. Y]

Ok, and what about sequential injection?

turbo joe
Yeah, very funny.

[turbo joe]

LOL...I was just sayin'...LOL...when he explained it...it didn't sound too advanced. :D

[mobes]

Ok, and what about sequential injection?

Does the 1110 have 6 injector drivers, or only 3?

[Mr. Y]

mobes
It has 3 p'n'p injector drives and extra 3 drivers on aux connector (pins 2-10, 2-11, 2-12).

[QWIKSTRIKE]

Hello guys. I've got AEM 1110 from gixxer750, so no more Haltech for me.

Does anybody run pnp box in sequential injection mode? How to configure AEM pro for that?
What injectors must be enabled (1,2,3 and 7,8,9)?
What about injector phasing?
Do I need ballast resistor to run extra inj. channels. How much ohms? (with 2 Ohm injectors)

And now about trigger. As you know stock CPS is 24 tooth. It has not very good construction (mounted on shaft that is driven via gear from exhaust cam)... A lot of free-play there... So we get unstable timing mark. It bounces 2-3* when checked with timing gun.

I removed stock VR-pickup from CPS and mounted it near intake cam gear. Cam gear is 48-tooth. I reconfigured Haltech for that and got _much_ stable timing mark. I can set ign. timing precisely now!
I don't know yet how stable is timing with AEM using stock CPS, but if there are more than 2* of floating, I'd convert it to 48-tooth trigger. This conversion is very simple and cheap (no extra parts needed, just some mounting brackets).
So.. Can 1110 box be configured to run 48-tooth trigger? How stable is your timing mark on AEM using stock CPS?

PS: Sean, I know you are very experienced in AEM tuning. Please chime in.


Can you post a picture of this setup with the new location o the pick up

[Mr. Y]

QWIKSTRIKE
I removed that sensor for now because running stock ECU till AEM arrives. But I'll try not to forget and grab pictures of sensor tomorrow.

[Mr. Y]

Some pics... Not pretiest thing, but definately works!

[chevyeater]

Haven't seen any of the AEM cars I've tuned jumping the ignition timing around randomly. It will cut off spark intermittently if it loses signal from a poorly preforming CPS. It logs timing errors when it does. Looks like you may have a decent poor mans pickup there though...

[X-man]

I run mine in sequential. You have to turn on 1,2,3 which are on from the factory, and 7,8,9,10. The Aem doesn't work right without 10 enabled. I run the same injector phasing as an MKIV TT. Remember to change 7,8,9, and 10 injctor outputs to primary when you enable them. Mine were set at base to start. I also went to cam/crank option and set my fuel teeth to 24
Then all you have to do is wire injector 4 to the output for injector 7, 5 to 8, and 6 to 9

Sean

[QWIKSTRIKE]

I run mine in sequential. You have to turn on 1,2,3 which are on from the factory, and 7,8,9,10. The Aem doesn't work right without 10 enabled. I run the same injector phasing as an MKIV TT. Remember to change 7,8,9, and 10 injctor outputs to primary when you enable them. Mine were set at base to start. I also went to cam/crank option and set my fuel teeth to 24
Then all you have to do is wire injector 4 to the output for injector 7, 5 to 8, and 6 to 9

Sean


Which compressor wheel do you have in the GT42 Sean

[Mr. Y]

I run mine in sequential. You have to turn on 1,2,3 which are on from the factory, and 7,8,9,10. The Aem doesn't work right without 10 enabled. I run the same injector phasing as an MKIV TT. Remember to change 7,8,9, and 10 injctor outputs to primary when you enable them. Mine were set at base to start. I also went to cam/crank option and set my fuel teeth to 24
Then all you have to do is wire injector 4 to the output for injector 7, 5 to 8, and 6 to 9

Sean

Thanks man!
... and what about wiring? What ballast resistors are you using for 7,8 and 9 drivers? Or you are hi-imp guy? or P&H?

[QWIKSTRIKE]

Some pics... Not pretiest thing, but definately works!

I like the concept, and was wondering how you id the wires to keep belts from hitting them, and if a belt breaks is the whole mechanism protected from belts tearing it to pieces.

[IJ.]

Belt breaks motor stops :)

[X-man]

Thanks man!
... and what about wiring? What ballast resistors are you using for 7,8 and 9 drivers? Or you are hi-imp guy? or P&H?

Your ballast resistor is on the hot side or 12 volt supply side. You run three ground wires from the AEM. The AEM grounds the injectors to fire them just like the stock ecu. I run low impediance 1000 cc injectors.

Sean

[Mr. Y]

X-man, I see, thank you... But I'm a bit scared because AEM manual says 1.5 Amps per channel... Injector's impedance is 2 Ohms (Denso's) and resistor is 3 Ohms. So we get 2.8 Amps per driver @ 14volts... Isn't it too much?

[X-man]

X-man, I see, thank you... But I'm a bit scared because AEM manual says 1.5 Amps per channel... Injector's impedance is 2 Ohms (Denso's) and resistor is 3 Ohms. So we get 2.8 Amps per driver @ 14volts... Isn't it too much?

Mine runs as good now on the 1000 cc injectors as it ever has in any other configuration I have ever run with batch fire and the stock ecu or even batch fire and the AEM. I have not experienced any ill effects as of yet with this combination and have made about 25 dyno pulls and and evening of drag racing plus some street time which involved sitting in traffic idling for about 20 minutes straight. I guess time will tell, but so far everything has done well.

Sean

[QWIKSTRIKE]

Belt breaks motor stops :)

I have seen belts twist into wires when they break and it ripps things out of place. My fan belt did this to my CPS wires some how.;) Those wires if they are in front of the tiiming cover can be in danger

[IJ.]

Ant: The Driver is at the bottom, usually when a motor breaks a cam belt it's all over within 1 rotation ;)

I guess it could shread and fap around in there but if you break a belt you're going to have the front covers off to repair it anyway!

While Yuri's Mod is PIG Ugly it's a great/simple idea :D

I think with a little refinement I'd be happy to run something like that.
(Damn sight cheaper than the New CPS I bought)

[QWIKSTRIKE]

Ant: The Driver is at the bottom, usually when a motor breaks a cam belt it's all over within 1 rotation ;)

I guess it could shread and fap around in there but if you break a belt you're going to have the front covers off to repair it anyway!

While Yuri's Mod is PIG Ugly it's a great/simple idea :D

I think with a little refinement I'd be happy to run something like that.
(Damn sight cheaper than the New CPS I bought)

I agree IJ but I was referrimg to where the wires are being fed. If the wires are fed from in front of the cover the alternator belt can break and wrap around the wire. If it is fed from the back to the front of the cam plate I think it won't be an issue because if the Cam belt breaks the whole engine stops. I found this out first hand.;) Only problem may be heat affecting the wires over time I guess. I like it so much I am thinking of having something fabbed up Ian.

[X-man]

Which compressor wheel do you have in the GT42 Sean

It is a GT4202 so depending on what website you read it is either a 74.3 mm or a 74.8 mm inducer and a 102 mm on the big side.

Sean

[QWIKSTRIKE]

It is a GT4202 so depending on what website you read it is either a 74.3 mm or a 74.8 mm inducer and a 102 mm on the big side.

Sean

Nice....you and figgie. When does it start spooling?

[X-man]

Nice....you and figgie. When does it start spooling?

1 psi @ 3900 rpm and full boost by 5100 rpm I think.

Sean