Northstar V8 swap questions (those that done it please chime in) (Page 4/4)
Will DEC 24, 08:48 PM
With just a built short block under stock heads, cams, intake and throttle, with this exhaust:



I dyno'd 312 to the wheels through a Getrag.

No trunk cutting.

[This message has been edited by Will (edited 12-24-2015).]

IXSLR8 DEC 25, 12:10 AM
Nice, Will! Nice headers and WHP.
84fiero123 DEC 25, 11:37 AM
You could always do what the jerk next door to our butcher did,

He cut out the trunk and put a regular V8 in the wrong way, for a Fiero anyway.

Steve

------------------
Technology is great when it works,
and one big pain in the ass when it doesn't



Detroit iron rules all the rest are just toys.

Lambokit MAR 04, 08:35 AM
I know this thread is almost a century old so who knows if I'll get a reply.
I'm looking for a Northstar Guru. Anyone that has swapped this engines before and might have the answers I'm looking for.
So here is my situation:
I have a Lamborghini Kit car on a Fiero Chassis (kinda) Its actually tube frame from the firewall back.
Anyway I took a 2007 N* and transaxle including the suspension even the stock cradle from a DTS.
I have the factory wire harness including the fuse box, ECM, TCM and I plan to use them. Already had them flashed to remove VATS and other stuff not needed.
Anyway as I filter through the wire harness to remove the unused wires I came across the ECBM (Electronic Brake Control Module). Now there are wires that feed this module but I dont think I need any of them. But I am afraid to just start hacking the wires out without being sure it wont cause a problem.
The only ones I question are the following:

Two wires for High Speed GMLAN Serial Data Bus Positive
Two wires for High SPeed GMLAN Serial Data Bus Negative
My RH Front Wheel Speed Sensor Signal
My LH Front Wheel Speed Sensor Signal
LH Speed Sensor Low Voltage Ref
RH Speed Sensor Low Voltage Ref
Oh and the High Speed GMLAN Serial Data Wake up

I believe the signals go into this module for the sake of ABS, Traction control, Stability Control features that wont be used on this application.
I'm assuming those signals are also sent to the TCM for shift points and such but I'm not sure. Anyone have any insight on this would be greatly appreciated. Thanks.
Will MAR 04, 09:32 AM
The 2006+ system is a network of multiple modules in the car. Fortunately this system is built from a mostly shared library of systems that GM used across their product portfolio starting in 2006. It's not as much of a red-headed step child as the older Cadillac systems. The 2006+ engines use a 58x crank trigger wheel, and are compatible on a basic level with every other GM system that uses a 58x wheel, which is everything 2006 and newer. I'm working on a Northstar swap using a 2006 Corvette ECM, but I have a manual transmission.

Talk to DarthFiero on this forum, who also runs http://www.gmtuners.com/

The ECM and TCM must be connected via the high speed GMLAN or they won't work right.
Absence of the EBTCM will cause some modules to set trouble codes, but those most likely will not illuminate the check engine light because they are not related to emissions.

The body control module (BCM) is involved in starting the vehicle and interacting with the anti-theft system. You did not list that as one of the modules you'll transfer over.

You'll *probably* need (someone with) HPTuners or EFILive or similar tuning suite to modify the ECM & TCM to run without the BCM.