Upgrading to LS1 PCM / ignition

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Jul 13, 2009 | 04:29 PM

ScaryFast

Thread Starter

Safety Car

Joined: Jul 2001

Posts: 4,871

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From: Detroit's West Side MI

Upgrading to LS1 PCM / ignition

What options are there to eliminate the LT1 ignition system (read: Optispark) and upgrade to an LS1 system?

I'm assuming I'll need:

LS1 computer
LS1 coils
Some way to get crank/cam position
New harness

What options are out there now to do this?

Jul 13, 2009 | 04:59 PM

STL94LT1

Race Director

Joined: Jan 2002

Posts: 12,261

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From: O'Fallon Missouri

efi connection

http://www.eficonnection.com/24x/default.htm

Jul 14, 2009 | 12:13 AM

Mojave

Melting Slicks

Joined: Oct 2006

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From: College Station TX

There is only 1 game in town with any kit of kit for this, and he just linked it.

Jul 14, 2009 | 10:27 AM

Ramrod92

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From: Olive Branch (Memphis suburb) MS

Cruise-In II Veteran

Does anyone know if this will send the correct signals to the CCM so you don't have a check engine light and the gauges work correctly?

Jul 14, 2009 | 10:39 AM

ScaryFast

Thread Starter

Safety Car

Joined: Jul 2001

Posts: 4,871

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From: Detroit's West Side MI

Quote:

Originally Posted by Ramrod92

Does anyone know if this will send the correct signals to the CCM so you don't have a check engine light and the gauges work correctly?

I've read the website over a few times and don't see any mention of that. I wonder if you still need your stock computer in there to run the guages, etc. Unfortunately, as is always the case with me, they're out of the office all week and I can't call for more info.

I don't need the guages myself, but I do want to know if I can completely remove the stock computer.

Mojave, what did you do about your ATI pulley? Did you have to pull your motor? I'm soooo frustrated that I didn't see this until we got mine back in the car. This would have been a no-brainer swap a few weeks ago when the whole damn motor was apart. Now it's a PITA to get in there...

Jul 14, 2009 | 12:07 PM

BrianCunningham

Team Owner

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From: Boston, Dallas, Detroit, SoCal, back to Boston MA

Are you still using the stock dash?

If so, you'll have to piggy back in the stock computer to run it.

Jul 14, 2009 | 01:54 PM

Ramrod92

Melting Slicks

Joined: Jul 1999

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From: Olive Branch (Memphis suburb) MS

Cruise-In II Veteran

Brian, I'm running a Dynaspark III rotorless opti, Delteq and a Accel DFI 7 with the stock CCM piggybacked (I think it's a Painless harness). I would like to see what anyone else is using to keep the stock gauges.

Jul 14, 2009 | 01:55 PM

ScaryFast

Thread Starter

Safety Car

Joined: Jul 2001

Posts: 4,871

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From: Detroit's West Side MI

Quote:

Originally Posted by BrianCunningham

Are you still using the stock dash?

If so, you'll have to piggy back in the stock computer to run it.

Nope. No stock dash here. I want a stand alone EFI system.

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Jul 14, 2009 | 03:54 PM

DVNCI

Melting Slicks

Joined: Jun 1999

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From: Bowling Green KY

Quote:

Originally Posted by STL94LT1

http://www.eficonnection.com/24x/default.htm

I might have done that before I bought my new Painless LT1 chassis harness but it was (and is) still pretty new and so unproven. Does anyone know someone who is using this?

This might be the route I eventually go since I'm not a fan of the LSX engine sound and this lets you keep the traditional firing order.

Jul 14, 2009 | 03:59 PM

#10

BrianCunningham

Team Owner

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From: Boston, Dallas, Detroit, SoCal, back to Boston MA

Quote:

Originally Posted by ScaryFast

Nope. No stock dash here. I want a stand alone EFI system.

I'd go aftermarket, say a FAST system.

You can run a conventional distributor, your just need someone to cut the hole for you.

EDIT
Or just plumb up a carb intake for EFI

Last edited by BrianCunningham; Jul 14, 2009 at 04:04 PM.

Jul 15, 2009 | 10:17 AM

#11

ScaryFast

Thread Starter

Safety Car

Joined: Jul 2001

Posts: 4,871

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From: Detroit's West Side MI

Quote:

Originally Posted by BrianCunningham

I'd go aftermarket, say a FAST system.

You can run a conventional distributor, your just need someone to cut the hole for you.

EDIT
Or just plumb up a carb intake for EFI

Yeah, but spending $1600 on an ignition system is counterproductive on this car, and anything other than a factory igntion will assess class points, regardless of my reasons to install. And while I can make the necessary modifications to the intake, etc, myself, it's hard to stomach going backwards with technology. Although going carb'd may be the best solution at the end of the day

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