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| Chevy 3.6 v6 engine swap (Page 2/3) |
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Cajun
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JAN 10, 10:23 PM
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msweldon & Will, thank you for your comments and feed back.
msweldon, not sure I full understand this comment...
You have a quick axle solution with the cobalt axles but you have to offset the engine 2" toward the PS. If you are going to rail on the engine, the cobalt SS axles are probably not going to hold up... then its custom
What is your suggestion on which engine would be the best candidate for a swap? Current I am considering either a 2011 or 2012 Chevy Impala 3.6. Oh, my transmission of choice would be an automatic.
Again, thanks for the comments.
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msweldon
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JAN 10, 11:42 PM
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| quote | Originally posted by Cajun:
msweldon & Will, thank you for your comments and feed back.
msweldon, not sure I full understand this comment...
You have a quick axle solution with the cobalt axles but you have to offset the engine 2" toward the PS. If you are going to rail on the engine, the cobalt SS axles are probably not going to hold up... then its custom
What is your suggestion on which engine would be the best candidate for a swap? Current I am considering either a 2011 or 2012 Chevy Impala 3.6. Oh, my transmission of choice would be an automatic.
Again, thanks for the comments. |
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No problem... if you shift the engine transmission mating point 2" to the passenger side using the F40 Transmission the Cobalt SS axles will bolt right into a Fiero. The downside is that the cobalt axles are prone to failure under higher hp or high acceleration stresses. So much so Chevy redesigned the axles and used beefier hubs from the Pontiac G6 and equivalent platforms.
You're going auto, either 6T70 or 6T75 depending on what you choose as your donor, so I'm not sure 'if' those axles would work as I'm only familiar with the F40 thus far.
As far as a donor goes, the impala like Daryl went with is a good choice as the wiring harness lines up nicely with the fiero positioning-wise, but that's it. All the circa ~2012 LFX's are right around 300hp with the Camaro's having the most by about 10hp. Whether or not its due to the tune or intake or both, I don't know. You 'could' slap on the Camaro intake to an impala LFX to find out. The Impala is a fine choice with the 6T70 6spd auto but the Acadia/Enclave/Traverse/XTS w/ LFX have the 6T75 which is a bit more stout. If you ever decided to go crazy with the LFX i.e. turbo, supercharge, nitrous, what have you... you could upgrade to the 6T80 theoretically.
As far as fitment goes.. the alternator and power steering pump(if you even plan on running power steering) can be swapped to either side of the engine with the appropriate brackets... as a matter of fact, if you go impala I recommend getting the Camaro alternator bracket and relocating it to the left side of the engine where the fiero alternator sits.. that frees up a lot of firewall room near the decklid brackets...
Honestly whether or not it controls the in tank fuel pump via BCM or FPCM pull whatever is necessary including as much of the harness, TCU, battery charging monitor, all fuse/relay boxes, fuel pumps, sensors, emission components, engine, ecu... Even if you don't want the Impala gauges, for example, pull them and use them to get underway.. then figure out how you want to handle the canbus signals to run the fiero gauges, aftermarket gauges etc.. What units you don't use, you can ebay, what harnesses you don't use, you will use the wire and bulkhead connectors elsewhere... If I were you I'd find a pick and pull and spend several days gutting it or purchase a wreck delivered to your house and gut it there then have it hauled off.... tracking down all the bits, connectors, and sensors to make the ECU happy has given me my first gray hairs.. 
Hope this helps...
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hyperv6
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JAN 11, 07:16 AM
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Cobalt SS axles as well the HHR SS will take 315 ft lbs easily. The GM tune for the Turbo model was set to this level by GM.
I never had an axle issue in my SS.
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Cajun
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JAN 11, 07:23 AM
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msweldon,
Thanks for the feedback and information.
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msweldon
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JAN 11, 11:49 AM
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| quote | Originally posted by hyperv6:
Cobalt SS axles as well the HHR SS will take 315 ft lbs easily. The GM tune for the Turbo model was set to this level by GM.
I never had an axle issue in my SS. |
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Additional specificity needed on my part. The 1st Gen cv axles on the supercharged Cobalt SS with the LSJ have experienced numerous failures. This is from what I've read on multiple Cobalt threads, it may be due only to drag racing with wheel hop and engine mount positioning, I don't know which but realized that they were not going to be enough to hold the torque my installed setup will be putting down, especially chicom manufactured ones. The LSJ axles are the ones that can bolt directly into an F40/F35 on the inboard side and into the Fiero uprights on the outboard ends. The failures were so prevalent GM reconfigured the CVs and uprights from larger GM platforms for the LNF Cobalt SS.
The turbo LNF axles are a different beast altogether, different outboard stubs and much thicker axle shafts. I utilized the LNF axles in my swap by replining the outboard shaft to fit a G6 cage then put my fiero stubs onto them. Hindsight being 20/20 I would have played around with some saab 9-3 / 9-5 axles or had a custom axle shop recreate the LNF axle shafts, splined correctly for the fiero outboard and 2" shorter for one and 2" longer for the other. If these fail I'll head over to DSS for their beefed up LSJ axles.
This all may be moot for Cajun as he's going 6T70/6T75[This message has been edited by msweldon (edited 01-11-2021).]
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Will
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JAN 11, 03:51 PM
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| quote | Originally posted by msweldon:
The Impala is a fine choice with the 6T70 6spd auto but the Acadia/Enclave/Traverse/XTS w/ LFX have the 6T75 which is a bit more stout. If you ever decided to go crazy with the LFX i.e. turbo, supercharge, nitrous, what have you... you could upgrade to the 6T80 theoretically.
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FYI, there is no 6T80E
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msweldon
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JAN 11, 04:38 PM
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Cajun
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JAN 12, 09:14 AM
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I have no plans of boosting the engine of other mods to increase hp. All I am looking for is a reliable engine and transmission that will bring my GT newer technology and horsepower.
I am hoping this will be the last of the upgrades for the vehicle.
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msweldon
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JAN 12, 09:52 AM
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| quote | Originally posted by Cajun:
I am hoping this will be the last of the upgrades for the vehicle. |
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Said every fiero owner ever.....
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Will
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JAN 12, 04:07 PM
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Interesting... I googled 6T80E, but I guess the E is no longer necessary
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