Camaro LT5

[dhutton]

Originally Posted by Stielow

John

I have been a fan of the GM controllers for most of my recent build for a few reasons. Refinement of calibration, and familiarity. The E67 used by the LS9 was used for a long time and was a very refined package. We have refined the 427 LS9 package for 10 years and over 30 engines. That package is sorted!

If the engine stays relatively stock the OE controllers work great with tools like HP Tuners. My buddy Dave Mikels tuned all this packages and continues to make them better.

I'm moving toward a hybrid set up on my LT5 do to the fact the GM ECMs will not do what I want to do. The aftermarket has made big gains in the last few years in refinement. I know as I move into a new control system we will have some learning curve. As a GM engineer I like things refined. Holes in an engine calibration bug me.

Mark

Hi Mark. So what controller are you using?

Thanks,
Don

[Stielow]

Originally Posted by dhutton

Hi Mark. So what controller are you using?



Thanks,

Don

I’m using two. The GM E92 to control most engine functions plus a Holley (TerminatorX) piggyback ECM to control the extra 8 PFI injectors and the electronic bypass valve.

It is a bit of a science fair project but allows access to the functions we want.

More to come when we get on dyno.

Mark


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[dhutton]

Originally Posted by Stielow

I’m using two. The GM E92 to control most engine functions plus a Holley (TerminatorX) piggyback ECM to control the extra 8 PFI injectors and the electronic bypass valve.

It is a bit of a science fair project but allows access to the functions we want.

More to come when we get on dyno.

Mark


Sent from my iPhone using Tapatalk

Ok so now I am confused. Are you replacing the direct injection with port injection or are you using both which sounds a little mind boggling.

Thanks,
Don

[jmac]

The LT5 uses both kinds of injectors. I think the DI injectors run out of steam at a certain power level and the port injectors supplement them.

[Stielow]

Originally Posted by dhutton

Ok so now I am confused. Are you replacing the direct injection with port injection or are you using both which sounds a little mind boggling.



Thanks,

Don

The GM LT4 ECM (E92) will control all the functions like DI injectors, timing, throttle. The Holley piggy back will add PFI injectors and a PWM bypass valve in the blower to control boost.

The stock LT5 use 2 ECMs from the factory. A E99 and a S53 ECMs. The issue with the LT5 set up is fairly locked up and does not have the flexibility we want.


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[dhutton]

Originally Posted by Stielow

The GM LT4 ECM (E92) will control all the functions like DI injectors, timing, throttle. The Holley piggy back will add PFI injectors and a PWM bypass valve in the blower to control boost.

The stock LT5 use 2 ECMs from the factory. A E99 and a S53 ECMs. The issue with the LT5 set up is fairly locked up and does not have the flexibility we want.


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So would the direct injection be a MAF based system and the port injection speed density? I’ll bet it will be fun keeping the two systems stable and playing well with each other. Sorry for all the questions. Just find it interesting.

Thanks,
Don