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My 1988 LFX F40 build. by Daryl M
Started on: 01-02-2019 10:42 PM
Replies: 574 (12554 views)
Last post by: Rickady88GT on 12-04-2020 09:08 PM
msweldon
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Report this Post10-30-2020 06:23 PM Click Here to See the Profile for msweldonClick Here to Email msweldonSend a Private Message to msweldonEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by fieroguru:

The Cobalt axle issue is due to old info and GM changing the differential offset with the production run of the F40.

People have used the Cobalt axles with the G6 version of the F40 by moving the drivetrain towards the passenger side. You guys are not using that version of the F40.

The issue is at sometime during the production run (2009 or possibly later) GM made the bellhousing on the non-GM metric versions deeper so they could fit larger clutch setups for higher HP and AWD applications. This moved the differential about 1" further from the engine vs. the G6 F40.


Hmmm.. I was able to mount my LF3 with the 2008 Saab 9-3 F40 which had been in production since 2006. I don't have a G6/F40 to compare it to but I was able to square up the LF3/F40 combo on the cradle with the cobalt turbo axles resting 50% in the tripot housings in the F40. This was all accomplished by moving the block/tranny mating point/line approximately two inches toward the passenger side.

Here's the driver side but did the same thing with the PS to make sure everything squared up.



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fieroguru
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Report this Post10-30-2020 06:58 PM Click Here to See the Profile for fieroguruSend a Private Message to fieroguruEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Rickady88GT:
A good clutch can fit in the short bell housing right? GM used a dual mass system that took up some space.


Compared to the Getrag or F23, even the shallow G6 F40 bellhousing is cavernous. I fit a 10" clutch in mine and Mwhite used a twin disk clutch in his.

 
quote
Originally posted by msweldon:
Hmmm.. I was able to mount my LF3 with the 2008 Saab 9-3 F40 which had been in production since 2006. I don't have a G6/F40 to compare it to but I was able to square up the LF3/F40 combo on the cradle with the cobalt turbo axles resting 50% in the tripot housings in the F40. This was all accomplished by moving the block/tranny mating point/line approximately two inches toward the passenger side.


Looks like they phased in the bellhousings starting in 2008/2009. I also found a reference for both depths in 2011-2014.

 
quote

2009 F40 (MK6)
General Motors Powertrain-Europe F40 six-speed manual car transaxle
2009 Model Year Summary

Carryover Features and Benefits from 2008i model year

ALL WHEEL DRIVE ADOPTION
The transmission housings are reinforced and elongated for bigger clutch size, 250 mm. The differential is upgraded concerning size and material in order to withstand higher output torque for AWD system.
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Daryl M
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Report this Post10-30-2020 07:46 PM Click Here to See the Profile for Daryl MClick Here to Email Daryl MSend a Private Message to Daryl MEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by fieroguru:

The Cobalt axle issue is due to old info and GM changing the differential offset with the production run of the F40.

People have used the Cobalt axles with the G6 version of the F40 by moving the drivetrain towards the passenger side. You guys are not using that version of the F40.

The issue is at sometime during the production run (2009 or possibly later) GM made the bellhousing on the non-GM metric versions deeper so they could fit larger clutch setups for higher HP and AWD applications. This moved the differential about 1" further from the engine vs. the G6 F40.

Here are a couple of picture of the G6 version (clean) and a later model version.



Guru, thanks for that info. I don't think I will have an issue with axle length. When I designed my engine/transmission mounts, I had the suspension and axles in place and centered the assembly so the whole thing was equal on both sides. I won't comment on axle strength, because I have no experience with them, but I do not intend on abusing the axles with the way I drive.
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msweldon
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Report this Post10-31-2020 11:30 AM Click Here to See the Profile for msweldonClick Here to Email msweldonSend a Private Message to msweldonEdit/Delete MessageReply w/QuoteDirect Link to This Post
[QUOTE]Originally posted by fieroguru:


Compared to the Getrag or F23, even the shallow G6 F40 bellhousing is cavernous. I fit a 10" clutch in mine and Mwhite used a twin disk clutch in his.
[QUOTE]

Could you elaborate on this twin disc setup he used? I tried to get RAM clutch to design and implement a 9.5" one for the f40 with everything a go except the input shaft out of the F40 was an inch too short..

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fieroguru
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Report this Post10-31-2020 12:53 PM Click Here to See the Profile for fieroguruSend a Private Message to fieroguruEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by msweldon:
Could you elaborate on this twin disc setup he used? I tried to get RAM clutch to design and implement a 9.5" one for the f40 with everything a go except the input shaft out of the F40 was an inch too short..


http://www.fiero.nl/forum/A...160323-2-123953.html
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Will
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Report this Post11-01-2020 09:30 AM Click Here to See the Profile for WillClick Here to Email WillSend a Private Message to WillEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by fieroguru:

The Cobalt axle issue is due to old info and GM changing the differential offset with the production run of the F40.

People have used the Cobalt axles with the G6 version of the F40 by moving the drivetrain towards the passenger side. You guys are not using that version of the F40.

The issue is at sometime during the production run (2009 or possibly later) GM made the bellhousing on the non-GM metric versions deeper so they could fit larger clutch setups for higher HP and AWD applications. This moved the differential about 1" further from the engine vs. the G6 F40.

Here are a couple of picture of the G6 version (clean) and a later model version.
http://fieroguruperformance...6-e1503262979609.jpg
]http://fieroguruperformance...62967347.jpg

They may even have done something similar with the F23, as the (later) Ecotec bellhousing is 10mm deeper than the (earlier) metric (2.2 pushrod) bellhousing.

[This message has been edited by Will (edited 11-01-2020).]

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Daryl M
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Report this Post11-01-2020 03:56 PM Click Here to See the Profile for Daryl MClick Here to Email Daryl MSend a Private Message to Daryl MEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by msweldon:


Hmmm.. I was able to mount my LF3 with the 2008 Saab 9-3 F40 which had been in production since 2006. I don't have a G6/F40 to compare it to but I was able to square up the LF3/F40 combo on the cradle with the cobalt turbo axles resting 50% in the tripot housings in the F40. This was all accomplished by moving the block/tranny mating point/line approximately two inches toward the passenger side.

Here's the driver side but did the same thing with the PS to make sure everything squared up.




Looks very similar to my result.
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Daryl M
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Report this Post11-17-2020 03:56 PM Click Here to See the Profile for Daryl MClick Here to Email Daryl MSend a Private Message to Daryl MEdit/Delete MessageReply w/QuoteDirect Link to This Post


On the left is the plastic hydrolic fitting for the clutch slave and associated items that I could not get to stop leaking.
On the right is my fabricated apparatus to serve the same function.
Comments encouraged.
Thanks
Daryl
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Will
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Report this Post11-17-2020 05:18 PM Click Here to See the Profile for WillClick Here to Email WillSend a Private Message to WillEdit/Delete MessageReply w/QuoteDirect Link to This Post
Complete with clutch isolation valve because you removed neutral from the transmission to save weight?
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Daryl M
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Report this Post11-17-2020 05:44 PM Click Here to See the Profile for Daryl MClick Here to Email Daryl MSend a Private Message to Daryl MEdit/Delete MessageReply w/QuoteDirect Link to This Post
My attempt at a bleed valve.
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Daryl M
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Report this Post12-04-2020 04:58 PM Click Here to See the Profile for Daryl MClick Here to Email Daryl MSend a Private Message to Daryl MEdit/Delete MessageReply w/QuoteDirect Link to This Post
Yet again I come to the brain trust for answers to life's persistent questions. Ok, so it may not be that big a deal, but I don't exactly know how to interface the Impala A/C compressor to the Fiero system. Below are photos of what has to be connected together. [img]http:




The first two show the fitting from the condenser and I assume goes to the compressor. What is that fitting called and what size is it? Since I will have to have a line or hose made, I would like to appear to know what I am doing when I order it.
Next photo shows the connection for the dryer. Can I use a standard OEM Fiero dryer, and if so what fitting comes off of the dryer? again will have to come up with something to connect the dryer to the compressor. The last two photos show the OEM Impala hoses that connect to the compressor. The larger hose is labeled 16mm and the aluminium pipe connected to it is 15.7mm or .61 inches O.D. the smaller hose is labeled 10mm and the aluminum pipe attached to it is 13mm or .496 inches O.D. any suggestions or info is appreciated.
Thanks
Daryl

[This message has been edited by Daryl M (edited 12-04-2020).]

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fieroguru
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Report this Post12-04-2020 07:04 PM Click Here to See the Profile for fieroguruSend a Private Message to fieroguruEdit/Delete MessageReply w/QuoteDirect Link to This Post
Looks like your car is missing the AC lines that run from the driver side of the engine bay all the way up front and connect to the two open lines.

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Will
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Report this Post12-04-2020 07:55 PM Click Here to See the Profile for WillClick Here to Email WillSend a Private Message to WillEdit/Delete MessageReply w/QuoteDirect Link to This Post
Yes, you're missing the long lines that run from the engine bay to the front compartment. Grab yourself a set of those before you go any further.

Here's my A/C line building adventure:
http://www.fiero.nl/forum/F.../000121-22.html#p850

http://www.fiero.nl/forum/F.../000121-22.html#p853

http://www.fiero.nl/forum/F.../000121-22.html#p865

http://www.fiero.nl/forum/F.../000121-22.html#p872

http://www.fiero.nl/forum/F.../000121-22.html#p875

http://www.fiero.nl/forum/F.../000121-22.html#p877

If you're going to have the ECM control the A/C compressor using A/C pressure read with GM's standard A/C pressure transducer, then you'll need to add a fitting for that somewhere.

http://www.fiero.nl/forum/F.../000121-23.html#p887
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Daryl M
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Report this Post12-04-2020 09:02 PM Click Here to See the Profile for Daryl MClick Here to Email Daryl MSend a Private Message to Daryl MEdit/Delete MessageReply w/QuoteDirect Link to This Post
Yes guys, I am missing the lines from the front to back. I have an 86GT donor that i have been stealing from, but it is not an A/C car.
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Rickady88GT
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Report this Post12-04-2020 09:08 PM Click Here to See the Profile for Rickady88GTClick Here to Email Rickady88GTSend a Private Message to Rickady88GTEdit/Delete MessageReply w/QuoteDirect Link to This Post
I thought I would not need the AC, well I was wrong. I very much like it.
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