My 1988 LFX F40 build. (Page 9/68)
Will FEB 01, 08:07 AM
Hondas V6's have 90 degree bank angles. Given the Miata's engine bay, the narrower bank angle of the LFX probably fits better.
thesameguy FEB 01, 11:48 AM

quote
Originally posted by wftb:

Check out Monster Miatas. LS motors too.



Yeah, V8 Miatas are well-established - I was surprised to see a modern V6 used, and intrigued by the idea of the electronics they're using to run it! If that software exists, it's good news to anyone who wants to put an LFX where it doesn't belong.
msweldon FEB 01, 02:57 PM

quote
Originally posted by thesameguy:


Yeah, V8 Miatas are well-established - I was surprised to see a modern V6 used, and intrigued by the idea of the electronics they're using to run it! If that software exists, it's good news to anyone who wants to put an LFX where it doesn't belong.



V8Roadsters and another outfit in Canada sell an LFX harness using the stock ECU modified enough to run the engine more or less by itself without the BCM and CANBUS yet still tunable by HPTuners.... I've spoken with the guys at V8Roadsters about a year ago for an LFX harness configured for the Fiero, i.e. layout for our mid engined setup and they have no problems configuring their harness as such..
Dennis LaGrua FEB 01, 03:30 PM

quote
Originally posted by msweldon:


V8Roadsters and another outfit in Canada sell an LFX harness using the stock ECU modified enough to run the engine more or less by itself without the BCM and CANBUS yet still tunable by HPTuners.... I've spoken with the guys at V8Roadsters about a year ago for an LFX harness configured for the Fiero, i.e. layout for our mid engined setup and they have no problems configuring their harness as such..



If plug and play LFX engine swap harnesses come available for the Fiero, I would imagine that they would sell but they would have to include the automatic that is part of the powertrain. As the years progress, we can't just continue to use 10-15 yr old engine technology that in many case will be high mileage and/or heavily worn. LFX engines are now the modern choice and very plentiful. Seems a logical choice for new Fiero swaps. Those engines are light weight and they provide 300-325 HP stock .

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Raydar FEB 01, 05:15 PM

quote
Originally posted by Dennis LaGrua:
If plug and play LFX engine swap harnesses come available for the Fiero, I would imagine that they would sell but they would have to include the automatic that is part of the powertrain. As the years progress, we can't just continue to use 10-15 yr old engine technology that in many case will be high mileage and/or heavily worn. LFX engines are now the modern choice and very plentiful. Seems a logical choice for new Fiero swaps. Those engines are light weight and they provide 300-325 HP stock .




I think that most of the stand-alones are geared toward manual swaps, but I don't see any reason (which may be short-sighted of me) that an automatic LFX PCM - from an Impala, for example - couldn't be "de-contented" in a manner similar to what's being done with the manual setup. Unless the automatic is dependent upon BCM stuff to function, that is.
I'm betting it could be made to work, with a little research.
(I think it would actually make a nice swap. My wife's mom has an LY7 with a longitudinal 6 speed auto (6L70?) in a CTS. I have often thought it would feel good in a Fiero. Configuration notwithstanding.)
thesameguy FEB 01, 05:41 PM

quote
Originally posted by Raydar:
I think that most of the stand-alones are geared toward manual swaps, but I don't see any reason (which may be short-sighted of me) that an automatic LFX PCM - from an Impala, for example - couldn't be "de-contented" in a manner similar to what's being done with the manual setup. Unless the automatic is dependent upon BCM stuff to function, that is.



Yes, this. I DGAF about the automatic... I would definitely go in for an LFX harness with an LFX ECM with a tune for standalone operation. TAKE MY MONEY.
Daryl M FEB 01, 05:49 PM

quote
Originally posted by Raydar:


I think that most of the stand-alones are geared toward manual swaps, but I don't see any reason (which may be short-sighted of me) that an automatic LFX PCM - from an Impala, for example - couldn't be "de-contented" in a manner similar to what's being done with the manual setup. Unless the automatic is dependent upon BCM stuff to function, that is.
I'm betting it could be made to work, with a little research.
(I think it would actually make a nice swap. My wife's mom has an LY7 with a longitudinal 6 speed auto (6L70?) in a CTS. I have often thought it would feel good in a Fiero. Configuration notwithstanding.)



According to Ryan (aka Darthfiero) THE BCM IS ALSO needed do a the automatic. That was one factor that I considered when I decided on the F40.
Raydar FEB 01, 07:16 PM

quote
Originally posted by Daryl M:

According to Ryan (aka Darthfiero) THE BCM IS ALSO needed do a the automatic. That was one factor that I considered when I decided on the F40.



Ah. Okay. Doesn't surprise me. Disappointed a bit (the automatic is that good) but not surprised.

[This message has been edited by Raydar (edited 02-01-2019).]

Daryl M FEB 01, 09:10 PM
My question is, does needing the BCM cause that many problems? With the BCM, the ECM and the Transmission Control Unit, there is more to mess with, but it should be possible. ABS, SRS, and Traction Control would have to be disabled, but the donor car instruments could be used. The Impala had a 160 mph speedo. That would be cool. The other possible issue I see is the physical size of the tranny. It is bigger than a manual and may require a shoe horn and a big hammer to make it fit.
wftb FEB 01, 11:05 PM
My ecotec swap basically has the entire wiring harness from a 2004 Cavalier, minus the lighting bits. It was easy, and the BCM was not a problem. If you have the fuel pump and harness from the donor car, it is all just plug and play. In my case, the fiero module is not even in my car.

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86 GT built 2.2 ecotec turbo
rear SLA suspension
QA1 coilovers on tube arms