The 3.6 is part of the GM High Feature V6 lineup. The Saab Turbo 2.8 is part of that engine family and comes factory with an F40, so there is a version of the F40 with the proper bellhousing. Just remember the F40 is available with about 4+ different bellhousings (Metric, Ecotec, High Feature, Opel Diesel) so it will be important to source the right one.
There has been 1 completed Saab 2.8 swap. There were several issues with the Saab ecm at the time, but he finally found a work around. //www.fiero.nl/forum/Forum1/HTML/091238.html
This is likely the most wished swap currently... but so far there is only 1 High Feature V6 swap completed and it didn't use the factory GM ECM. The second one is getting close, but it will be the 2nd. The 3.6L swap is far from fully documented and no kit exists, which makes it very, very challenging.
Thaks for that info. I guess I'll try to stick to the V8 that requires the least Fab work that is compatible with the F40. Would that be the 5.3L that you have been talking about?
So, I've decided to go with the LS4/F40 combo. It seems to be the combination of power and ease of install. Thanks to Fiero Guru, your advice is what steered me in tis direction.
Wiring details are fully documented for the E67 ecm in my build thread.
Ok, I'll check it out. What about the a/c, does the fireo a/c system work, or does it need to be changed. Also, how is the steering effort with those 18s?
Fiero A/C doesn't need any ecm to run, so you have options on how you want to run it. I used the stock LS4 A/C compressor but use Fiero non-ecm wiring/control since the E67 ecm doesn't have a discrete A/C request signal input.
I only have 17s up front, but due to width and offset, the front wheels reduced the scrub radius from stock, so they aren't any harder to turn.
[This message has been edited by fieroguru (edited 07-09-2019).]
Fiero A/C doesn't need any ecm to run, so you have options on how you want to run it. I used the stock LS4 A/C compressor but use Fiero non-ecm wiring/control since the E67 ecm doesn't have a discrete A/C request signal input.
I only have 17s up front, but due to width and offset, the front wheels reduced the scrub radius from stock, so they aren't any harder to turn.
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Assuming I had everything I need to complete the swap, how long to you think it would take to complete?
The 3.6 is part of the GM High Feature V6 lineup. The Saab Turbo 2.8 is part of that engine family and comes factory with an F40, so there is a version of the F40 with the proper bellhousing. Just remember the F40 is available with about 4+ different bellhousings (Metric, Ecotec, High Feature, Opel Diesel) so it will be important to source the right one.
There has been 1 completed Saab 2.8 swap. There were several issues with the Saab ecm at the time, but he finally found a work around. //www.fiero.nl/forum/Forum1/HTML/091238.html
This is likely the most wished swap currently... but so far there is only 1 High Feature V6 swap completed and it didn't use the factory GM ECM. The second one is getting close, but it will be the 2nd. The 3.6L swap is far from fully documented and no kit exists, which makes it very, very challenging.
I can vouch for that statement. The LFX/F40 swap does require a fair amount of original work. Lately I have been tied up with other things so progress has been slow, but I am satisfied that this swap will be one that becomes popular. The combination of available and affordable engines and the light weight and respectable power of this motor transmission combination, will become more desirable as other options age out. Just my opinion.
Originally posted by Chief08: Assuming I had everything I need to complete the swap, how long to you think it would take to complete?
I would allow at least 3 months. It took me 3 years, but I was developing solutions and did another SBC swap in the middle.
It really depends on what else you do and what you want to end up with. It is one thing to throw a swap together and have it look like it. Completely different amount of work to make it look awesome, run great, and be daily driver reliable.
well don't that suck can the ring and pinion be swapped into another tranny ?
The F23 five speed from an HHR has 4.17ish final. The F23 from a Saturn Vue has a 4.40 final.
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Originally posted by fieroguru:
Fiero A/C doesn't need any ecm to run, so you have options on how you want to run it. I used the stock LS4 A/C compressor but use Fiero non-ecm wiring/control since the E67 ecm doesn't have a discrete A/C request signal input.
There are 24x LS4's, right? So it's possible to do the swap with an earlier LS computer (drawing a blank on the PN right now), while using the "analog" option in the tune for A/C control. This requires adding a pressure transducer to the high side of the system, but that's not hard considering the other A/C work that has to be done.
Originally posted by Will: There are 24x LS4's, right? So it's possible to do the swap with an earlier LS computer (drawing a blank on the PN right now), while using the "analog" option in the tune for A/C control. This requires adding a pressure transducer to the high side of the system, but that's not hard considering the other A/C work that has to be done.
Yes, the 05 and 06 LS4s are 24X. They come with the E40 (which I think does have an AC request input), but you can also run them with the other school 411 ecm an a throttle cable.
Since the F40 came in at least 4 bell housing patterns, a version of it will bolt up to nearly any GM transverse FWD engine built since the 1980s. The only FWD bellhousing pattern it didn't come with is the Quad 4.
The G6 version uses the GM Metric bellhousing pattern, which is the one that will bolt to the 2.8/3.1/3.4/3.5/3.9 and 3800 V6 engines as well as the caddy 4.5/4.9, N*/Aurora and the LS4.
Since the F40 came in at least 4 bell housing patterns, a version of it will bolt up to nearly any GM transverse FWD engine built since the 1980s. The only FWD bellhousing pattern it didn't come with is the Quad 4.
The G6 version uses the GM Metric bellhousing pattern, which is the one that will bolt to the 2.8/3.1/3.4/3.5/3.9 and 3800 V6 engines as well as the caddy 4.5/4.9, N*/Aurora and the LS4.
Very informative, thank you. I found a nice 88 GT with the 3.4L. It's not a V8 obviously, but it's already done and it will save me a ton of money. So if I get it i'd like to add the 6spd.
