3.6 liter High Feature I a Fiero (Page 2/15)
Daryl M SEP 07, 11:29 PM
I just checked with the doner car owner. I can get all of the items I will need from the car for nearly nothing. Car was wreaked 2 years ago, but ran great prior to that. 302 hp , 265 lb/ft of torque should be sufficient.
Daryl M SEP 07, 11:40 PM
Any suggestions about the merits of useing an aftermarket stand alone ecm? Also considering an F40 manual transmission. As you can guess, I am sitll in the planning stages of this project, so I am open to suggestions.
dobey SEP 08, 08:47 AM

quote
Originally posted by gtjoe:
Im pretty sure I have read that the bcm stuff can be removed from the high feature tune. There seems to be a few people putting these motors in miatas

link to a miata forum with a thread about a miata with a lfx installed http://www.v8miata.net/cars...fx-fresh-build-2511/




Yes, I didn't say it couldn't be. I said that swapping the engine will require a lot of tuning work, and all of that hasn't been entirely fleshed out yet on a wide scale.
dobey SEP 08, 08:49 AM

quote
Originally posted by Daryl M:

Any suggestions about the merits of useing an aftermarket stand alone ecm? Also considering an F40 manual transmission. As you can guess, I am sitll in the planning stages of this project, so I am open to suggestions.



For the F40 you will either need one from a Saab 2.8t manual car, or an adapter plate and moving the starter mount.

As for aftermarket ECM, none of the reasonably priced ones can do SIDI yet AFAIK. The LFX is a SIDI engine.
Daryl M SEP 08, 10:00 AM
Great feedback everyone, thanks. I haven't bought the engine/tranny yet, so I am not locked into it. I may also consider a Buick Regal 2.0 liter turbo. These donor cars are available at auction. Any feedback on this option?
dobey SEP 08, 11:26 AM

quote
Originally posted by Daryl M:

Great feedback everyone, thanks. I haven't bought the engine/tranny yet, so I am not locked into it. I may also consider a Buick Regal 2.0 liter turbo. These donor cars are available at auction. Any feedback on this option?



The new 2.0 turbo is also a swap that has not actually been completed in a Fiero. It's also a SIDI engine.

Really, what are your goals for a swap in your car? Do you have the skills/time/space and/or money to do it? If you can't tune an ECU yourself and don't want to pay to have it done, you're better off looking at older engines from early-mid 90s, or buying something that comes as a kit. Even then though, you'll almost certainly need to do a bit of tuning.
mender SEP 08, 02:55 PM
I have a 2012 Impala LFX engine ($800 Cdn) that is getting hooked up to an F23 with the Quad4 bellhousing pattern. Everything looks good but I haven't had time to finish it up, will get back at it once the snow flies up here.

ECU: I'm going to use just the stock ECU without any extra bits. I had mine set up by Will at Overkill, he's supposed to be the guru of these engines. Apparently this is the first one that he's done for a Fiero engine swap and I'll be sending him datalogs for further refinement once it's in the car and running. Should be interesting to see how the DBW and electronic pedal work out but Will's done a bunch of manual LFX Camaro tuning as well as LFX Impala tuning so I'm pretty sure he'll be on top of it. Cost was around $500 for the tune.
http://www.getoverkilled.ca/

What's the mileage on your engine? Mine had 12,000 miles and there was enough carbon on the backsides of the intake valves that I decided to take it apart and clean things up. As mentioned, it'll be getting a good catch can.

I suspect that the LFX/F23/Overkill combo will turn out to be very popular once a few of them are on the road.

[This message has been edited by mender (edited 09-08-2016).]

Daryl M SEP 08, 04:54 PM
Mender, are you concerned about the strenth of the F23? Rated torque is 100 ft/lbs less than what the LFX makes. Also, is the bell housing bolt pattern of the LFX the same as the 2.0 liter Ecotec?
qwikgta SEP 08, 05:04 PM

quote
Originally posted by Daryl M:
As for tuning, I may be missing something, but if the install is functionally the same as the doner car, shouldn't the factory ecm from the doner do the job?



Yep, its just that easy.
Dennis LaGrua SEP 08, 06:22 PM
The GM high feature engine makes great torque and horsepower. In a Fiero it would prove to be a very good performer. The things that keep me away from doing this swap are the high number of required inputs that the PCM expects to see from the ABS, Body Control module, wheel sensors, gauges, gas tank pressure, VVT, DFI, traction control, electric steering and many of the other CAN inputs. Its also a drive by wire engine that uses a gas pedal module. If the PCM doesn't see all the required inputs then it goes into default mode. For this swap I would go with a cable operated throttle body and use a more friendly easy to program OBDII PCM like ones from the early Grand Prix 3800's. That is if you can figure out a way around the VVT. There is most likely a way to use the high feature PCM but AFAIK, it isn't heavily documented. I guess anything can be made to operate with anything but where do you find the forumula? Maybe with the GM stand alone PCM used for marine use.

------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

[This message has been edited by Dennis LaGrua (edited 09-08-2016).]