The LFX engine for a swap?. (Page 1/7)
Dennis LaGrua NOV 17, 04:50 AM
Most Fiero owners that wanted more horsepower went with the 3800SC or 4.9L engines. A few tried the 3500/3900 engines but I do not recall seeing many LFX engine swaps. The LFX might be the next great engine for a V6 Fiero engine swap because its light and in the right version makes 300HP normally aspirated . Using VVT the torque curve on this engine is very strong ( almost flat) to 7,000 RPM. The engine is being swapped into other cars so why not a Fiero? Editing software is available that will allow this engine to run on the stock PCM without the BCM, ABS and instrument. interfaces. Point is that this engine has been used "stand alone". The swap would require custom mounts and axles but it might be worth the trouble. I have been considering doing a swap with this engine but has anyone successfully completed one yet? If so how did it go and how is the performance?

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" 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, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, 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 "

wftb NOV 17, 08:50 AM
Not running yet, the OP got busy with other stuff. http://www.fiero.nl/forum/Forum2/HTML/137446.html There is one other thread along the same lines but I have not seen it for a while.
Daryl M NOV 17, 11:07 AM
I am in process now. I am using an F40 transmission with a 2013 LFX from an Impala. Doing motor mounts now.
Daryl M NOV 17, 11:20 AM
http://www.fiero.nl/forum/Forum2/HTML/138651.html
Dennis LaGrua NOV 17, 11:22 AM
The simplest solution for the LFX swap might be bolting in the FWD configuration that came with the 6 speed automatic that was designed for its torque curve and power. While we have yet to see this engine swap running in a Fiero it has been done on many other brands of cars and trucks.
To answer the question below: the LFX is part of GM's current high feature 6 cyl DOHC Alloytec engine family. It is lighter than previous GM engines (all aluminum) and makes more horsepower. At 303-321 HP and 264-275 ft lbs of torque ( and a flat curve) it brings impressive performance and gas mileage. Its also a flex fuel friendly design. Its today's technology. Late model Cadillacs, Chevrolets or Buicks use them.

------------------
" 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, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, 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 11-17-2018).]

Lou6t4gto NOV 17, 05:59 PM
Maybe a dumb question, but maybe alot of folks never heard of a lfx. What is it , and what did it come in ???? thanks
Rickady88GT NOV 17, 09:48 PM

quote
Originally posted by Dennis LaGrua:

The simplest solution for the LFX swap might be bolting in the FWD configuration that came with the 6 speed automatic that was designed for its torque curve and power. While we have yet to see this engine swap running in a Fiero it has been done on many other brands of cars and trucks.
To answer the question below: the LFX is part of GM's current high feature 6 cyl DOHC Alloytec engine family. It is lighter than previous GM engines (all aluminum) and makes more horsepower. At 303-321 HP and 264-275 ft lbs of torque ( and a flat curve) it brings impressive performance and gas mileage. Its also a flex fuel friendly design. Its today's technology. Late model Cadillacs, Chevrolets or Buicks use them.



They also sound AMAZING with a good exhaust system.
Daryl M NOV 18, 02:54 AM
http://www.fiero.nl/forum/Forum2/HTML/138651.html
Daryl M NOV 18, 03:00 AM
The LFX is a recent version of the high feature v6. It comes in most full size GM cars and SUVs. It typically produces 300-325hp and 265-275 lb/ft of torque.
Daryl M NOV 18, 03:02 AM
https://en.m.wikipedia.org/..._High_Feature_engine