LS Swap
Thread Starter
Racer
Joined: Oct 2011
Posts: 318
Likes: 3
From: NP Nebraska
LS Swap
I have an LS2 and T56 out of a 2006 GTO. I have it with the flashed OEM ECU, DBW pedal, GTO engine harness, etc. in my C3. I've had the build running and driving but now it doesn't have spark or fuel pump. Thinking my E40 ECU is fried. When I stated this swap, years ago, there weren't many options as the GTO LS2 is an oddball with 24x crank reluctor and a 1x cam sensor, EV6 injectors and the cam sensor on the timing chain cover. I just want to get it up and running without spending a bunch of time reworking the entire build. I question whether I should upgrade the cam, intake, throttle body but then I'll go down another rabbit hole before it runs. I realize most of us haven't tried more than one of the newer aftermarket products to provide real comparison so I guess I'm just looking for encouragement and direction. My options are:
1. Holley Terminator X 550-931 - requires a wire switch in the cam sensor harness to work with the 24x but Holley says it'll work ($1900)
2. HP tuners Core ECU - ($2000 for ECU, add another $950 for their harness)
3. ACE EFI - $960 but can upgrade to kit with a bigger intake ($1640)
4. PSI Kit - $1900
5. FI Tech - $1200 but can upgrade to kit with bigger intake ($1700 on backorder)
6. Get another stock ECU - flashed cost is $500 but could lead back to the same point I'm at now
Does anyone have a similar GTO LS2 build with any insight? OR experience with any of the products that might help me decide? OR other options to consider?
Thank you for your input!
Mike
1. Holley Terminator X 550-931 - requires a wire switch in the cam sensor harness to work with the 24x but Holley says it'll work ($1900)
2. HP tuners Core ECU - ($2000 for ECU, add another $950 for their harness)
3. ACE EFI - $960 but can upgrade to kit with a bigger intake ($1640)
4. PSI Kit - $1900
5. FI Tech - $1200 but can upgrade to kit with bigger intake ($1700 on backorder)
6. Get another stock ECU - flashed cost is $500 but could lead back to the same point I'm at now
Does anyone have a similar GTO LS2 build with any insight? OR experience with any of the products that might help me decide? OR other options to consider?
Thank you for your input!
Mike
Drifting
Joined: Sep 2024
Posts: 1,512
Likes: 987
From: Florida
I have an LS2 and T56 out of a 2006 GTO. I have it with the flashed OEM ECU, DBW pedal, GTO engine harness, etc. in my C3. I've had the build running and driving but now it doesn't have spark or fuel pump. Thinking my E40 ECU is fried. When I stated this swap, years ago, there weren't many options as the GTO LS2 is an oddball with 24x crank reluctor and a 1x cam sensor, EV6 injectors and the cam sensor on the timing chain cover. I just want to get it up and running without spending a bunch of time reworking the entire build. I question whether I should upgrade the cam, intake, throttle body but then I'll go down another rabbit hole before it runs. I realize most of us haven't tried more than one of the newer aftermarket products to provide real comparison so I guess I'm just looking for encouragement and direction. My options are:
1. Holley Terminator X 550-931 - requires a wire switch in the cam sensor harness to work with the 24x but Holley says it'll work ($1900)
2. HP tuners Core ECU - ($2000 for ECU, add another $950 for their harness)
3. ACE EFI - $960 but can upgrade to kit with a bigger intake ($1640)
4. PSI Kit - $1900
5. FI Tech - $1200 but can upgrade to kit with bigger intake ($1700 on backorder)
6. Get another stock ECU - flashed cost is $500 but could lead back to the same point I'm at now
Does anyone have a similar GTO LS2 build with any insight? OR experience with any of the products that might help me decide? OR other options to consider?
Thank you for your input!
Mike
1. Holley Terminator X 550-931 - requires a wire switch in the cam sensor harness to work with the 24x but Holley says it'll work ($1900)
2. HP tuners Core ECU - ($2000 for ECU, add another $950 for their harness)
3. ACE EFI - $960 but can upgrade to kit with a bigger intake ($1640)
4. PSI Kit - $1900
5. FI Tech - $1200 but can upgrade to kit with bigger intake ($1700 on backorder)
6. Get another stock ECU - flashed cost is $500 but could lead back to the same point I'm at now
Does anyone have a similar GTO LS2 build with any insight? OR experience with any of the products that might help me decide? OR other options to consider?
Thank you for your input!
Mike
Thread Starter
Racer
Joined: Oct 2011
Posts: 318
Likes: 3
From: NP Nebraska
I'll look over there. Did get a lot of support for the Terminator X platform so I went that way. I guess if I want a bigger intake down the road I'll work with it. I didn't find anyone that has experience with the cheaper ACE, PSI, or FI Tech products. Thank you!
