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LS4 / F40 swap - fieroguru by fieroguru
Started on: 12-13-2010 01:34 PM
Replies: 1688 (133490 views)
Last post by: Trinten on 04-06-2021 06:21 PM
fieroguru
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Report this Post03-09-2021 06:10 AM Click Here to See the Profile for fieroguruSend a Private Message to fieroguruEdit/Delete MessageReply w/QuoteDirect Link to This Post
Just roughing in the general concept digitally... several aspects of this will still change some - like I don't know for sure that my caliper will clear the arm (it is flipped 180 from stock 88 position) and the upper bracket is just a block right now and its exact geometry isn't figured out at the moment.

[This message has been edited by fieroguru (edited 03-09-2021).]

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qwikgta
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Report this Post03-09-2021 12:23 PM Click Here to See the Profile for qwikgtaClick Here to Email qwikgtaSend a Private Message to qwikgtaEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Will:


What's this part from?


I was looking for "ball joint extensions" and those popped up. They seem to be used by the import crowd for lowing or correcting a lowered suspension
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Report this Post03-09-2021 12:38 PM Click Here to See the Profile for qwikgtaClick Here to Email qwikgtaSend a Private Message to qwikgtaEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by fieroguru:
As with anything, there are hundreds of possible solutions. Where things differ are the constraints people put on their solution. Since I am an 88 only guy, I want my solution to use as many stock 88 suspension pickup points on the cradle as possible.


No I get it, I love that your an 88 guy, your vision and capability will allow all of us to benefit. I was only offering up my observation and a possible solution. As you have said, others have already used different parts, or modified Fiero parts to make this work. I've only recently looked into the 87 stuff after picking up this 87 GT, the 84-87 stuff is new to me having owned 88's for so long. Looking forward to seeing how your new parts evolve.

Rob
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fieroguru
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Report this Post03-21-2021 06:05 PM Click Here to See the Profile for fieroguruSend a Private Message to fieroguruEdit/Delete MessageReply w/QuoteDirect Link to This Post
Fought the plasma table for about 4 hrs today... the cut program would randomly lock up mid cut... ended up being a bad USB connection.

Eventually I was able to cut out the wheel bearing flange for the C5 wheel bearing as well as the complimentary brake bracket for my 13" rotors and 88 calipers.



I am always looking for stuff and going down rabbit holes so it seems... I came across this wheel flange and bearing. It is a solid flange, so redrilling it for 2 other patterns would not be any issue. The bearing is larger than the opening in the 88 front knuckle, but not by much. If the 88 front knuckle is cast steel vs. cast iron, then this becomes a real possibility to weld on the needed bearings supports and make this one work.




I also had the opportunity to pick up one of these:

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Will
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Report this Post03-22-2021 09:32 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:
I am always looking for stuff and going down rabbit holes so it seems... I came across this wheel flange and bearing. It is a solid flange, so redrilling it for 2 other patterns would not be any issue. The bearing is larger than the opening in the 88 front knuckle, but not by much. If the 88 front knuckle is cast steel vs. cast iron, then this becomes a real possibility to weld on the needed bearings supports and make this one work.





What's the application?

If you're looking at things like that, then BMW's system of having a fixed spindle with a similar sealed DRACBB pressed into the hub would work. The spindle would just bolt onto the '88 knuckle where the factory hub bolts on.
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qwikgta
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Report this Post04-02-2021 11:26 PM Click Here to See the Profile for qwikgtaClick Here to Email qwikgtaSend a Private Message to qwikgtaEdit/Delete MessageReply w/QuoteDirect Link to This Post
I know its not the same thing, but when I saw this I thought of your design.

https://www.elephantracing....stable-spring-plate/




Rob

[This message has been edited by qwikgta (edited 04-03-2021).]

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fieroguru
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Report this Post04-04-2021 02:25 PM Click Here to See the Profile for fieroguruSend a Private Message to fieroguruEdit/Delete MessageReply w/QuoteDirect Link to This Post
I also went ahead and purchased the Race Traction Control setup and waiting for it to arrive from oversees. It should help keep the Fiero pointed in the direction of travel.


Picked up a set of 97-02 C5 rear axles for the CV and fitment to the C5 wheel bearing.


Been doing a lot of pondering the custom rear suspension and basically exploring dual paths. The 3 link setup similar to the C3 or making a dropped rear upright that accepts the stock 88 lateral & trailing links, the C5 wheel bearing and a 92-92 Camaro strut (still available in fully adjustable rebound and compression). Both paths will use the same basic method for housing/supporting the wheel bearing and connecting it to either the tailing arm or dropped knuckle. Here is what I have so far for enclosing the wheel bearing and creating some good attachment points for either solution. I do need to shorten the spaces a little more so the bolt heads will fully clear the CV.






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Will
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Report this Post04-06-2021 03:48 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
Going to C7 bearings lets you step up to 33 spline outer CVs, which were also used with a large number of GM FWD cars. Parts are more widely available and as a side effect, you get a choice between 5x115 and 5x4.75" bearings.
The C7 bearings are plug/play for C5 bearings, except for integral ABS sensor. The C7 bearings do not have built in ABS.

Either way, you can ultimately play with a set of these:
https://www.driveshaftshop....-porsche-930-cv-2210

or

https://www.driveshaftshop....108mm-porsche-930-cv

[This message has been edited by Will (edited 04-06-2021).]

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Trinten
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Report this Post04-06-2021 06:21 PM Click Here to See the Profile for TrintenSend a Private Message to TrintenEdit/Delete MessageReply w/QuoteDirect Link to This Post
Question on this topic, as I'll be getting custom length axles from the drive shaft shop with C5 CVs on it... what is the difference/improvement of having a "Porsche style" inner and outer CV? I haven't had great luck in finding information on this that made sense.
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