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Longdrop E36 328i Track Car
12-01-2017, 04:59 PM
Post: #21
Longdrop E36 328i Track Car
(12-01-2017 03:14 PM)ChrisBrand@TheFanatics Wrote:  
(12-01-2017 09:28 AM)AudiDriver Wrote:  Hi Captain. I read your thread on this. I want to replace the diff and sub frame bushes while I'm busy with this upgrade. It is such a PITA job to do when you don't have a lift that I don't want to ever have to go back to them.

A set of diff and subframe bushes is now nearly R7k. The amount is not justifiable in my opinion.

I have access to a guy who supplies specialised polyurethane moulds for some of our ball mills so I suppose it is an option to go to him.

What do you recommend?


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Is that the price through moranor@axis?


These come from England that's why they so expensive


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ChrisBrand@TheFanatics (01-12-2017)
12-01-2017, 10:29 PM
Post: #22
RE: Longdrop E36 328i Track Car
Quote:Next it will be going for LS conversion before I fit this

Is that an LS unit or are you converting it to one? I have tried to search but most of what I read indicated that it was not possible. I have searched and found an LS unit as well as an open one in the same ratio, but the LS one is 4 times more $.

So if it's possible to convert the open one I would rather go that route. What is this exercise going to cost you?
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13-01-2017, 09:47 AM
Post: #23
RE: Longdrop E36 328i Track Car
7k is a bit much... Axis price on the Powerflex black series R 5285 incl shipping

this is for all the subframe and diff bushes road series will be a little less

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ChrisBrand@TheFanatics (01-13-2017)
13-01-2017, 11:15 AM
Post: #24
RE: Longdrop E36 328i Track Car
(12-01-2017 10:29 PM)PaKiMoNSTeR Wrote:  
Quote:Next it will be going for LS conversion before I fit this

Is that an LS unit or are you converting it to one? I have tried to search but most of what I read indicated that it was not possible. I have searched and found an LS unit as well as an open one in the same ratio, but the LS one is 4 times more $.

So if it's possible to convert the open one I would rather go that route. What is this exercise going to cost you?

http://www.bmwfanatics.co.za/showthread.php?tid=27125

Current -1996 E36 328i Individual

Ex - 1998 E36 318iS

[Image: 2_6392967547.jpg]

"If you park your car, walk away and don't look back, you're driving the wrong car"
....Real cars don't power the front wheels, they lift them....
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13-01-2017, 06:42 PM
Post: #25
Longdrop E36 328i Track Car
I added the price of the subframe inserts also - that's why it was so expensive. The kit for the subframe is about R3200.


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moranor@axis (01-16-2017)
15-01-2017, 10:07 PM (This post was last modified: 16-01-2017 07:30 AM by AudiDriver.)
Post: #26
RE: Longdrop E36 328i Track Car
Today I inspectted the rear suspension to see what else needs to be replaced or upgraded immediately.

The subframe bushes are miraculously still in good nick. But the front bushes on the rear trailing arms are busted. So I'm going to order some Powerflex ones. I might at the same time replace the other two with upgraded M3 ball joints.

The wishbone joints seem OK. I think I'll leave them alone for now.

I noticed when I first got underneath the car that the steel cover of the right CV joint had split open. I'll get an opportunity during replacement of these bushes to rectify that.

3.46 ratio diff cleaned inside and out and inspected. It doesn't look like it has worked at all. I plan to remedy that...

[Image: 71056A46-7FA0-440F-9D38-D6958AF4FD8A_zpsl3rmcxs3.jpg]

Whether this is going to become an LS unit immediately will remain to be seen. I'm of a good mind of fitting it now and tracking it open for a few months before I add LS.

Here's a comparison of the wheel torque for my car using the best gear for each speed - 2.93 vs 3.45 ratio diff:

[Image: 8009991B-08D5-414A-9639-5F7D3AFC3030_zpsdjq1t9ga.png]

Max engine speed was set at 6500rpm. I don't have dyno data beyond that anyway.

The red line shows the difference between the two setups (3.45 minus 2.93). Where this goes negative the potential acceleration using the longer diff is better. But mostly it is positive or similar, indicating the performance benefit of the shorter ratio. One would need to look at apex and max speeds on track to decide which ratio would be optimal. I think the 3.45 is a good compromise for a car that can still be used as a daily also.
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16-01-2017, 06:09 AM
Post: #27
RE: Longdrop E36 328i Track Car
I have a 3.73 in my 328i and never saw 6th gear on the kyalami straight so even that is too long for a dedicated track car, although most track cars run 5spd boxes in which case the 3.73 is perfect.
3.91 is wild, too wild for the street but brilliant on the track.
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AudiDriver (01-16-2017)
16-01-2017, 07:37 AM (This post was last modified: 16-01-2017 08:15 AM by AudiDriver.)
Post: #28
RE: Longdrop E36 328i Track Car
(16-01-2017 06:09 AM)Gizmo Wrote:  I have a 3.73 in my 328i and never saw 6th gear on the kyalami straight so even that is too long for a dedicated track car, although most track cars run 5spd boxes in which case the 3.73 is perfect.
3.91 is wild, too wild for the street but brilliant on the track.

I did a comparison for 3.91 and 3.64 (close enough to 3.73 for a quick comparison) also. It does look like the 3.91 would be the the one to go for on the track, as it yields the greatest improvement, but it's too short for a 5-speed that is used for commuting also. 3.73 should be a very lekker ratio for a track car, especially if you have an overdrive 6th gear. Edit: I didn't know one could get a 3.73 ratio.

3.91:
[Image: B6D618E1-5978-40A8-AD4D-C0D00E4EDCED_zpszuvh3eha.png]

3.64:
[Image: B6C5256A-CD5E-4AC9-9762-60E527018CBF_zpsyytfjct8.png]
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16-01-2017, 08:24 AM (This post was last modified: 16-01-2017 08:28 AM by Gizmo.)
Post: #29
RE: Longdrop E36 328i Track Car
It was a medium case E36 3.73:1 which I fitted a e34 LS centre portion to.
To date it has been the only one I've seen.

From what I can work out from ETK is it comes from a Japanese import e36 325i auto.
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16-01-2017, 10:53 PM
Post: #30
RE: Longdrop E36 328i Track Car
Trialling arm bush limiters, speak to mr. Axis. I got set from him which is on the e46.


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Yesterday, 05:45 AM (This post was last modified: Yesterday 05:47 AM by AudiDriver.)
Post: #31
RE: Longdrop E36 328i Track Car
(16-01-2017 10:53 PM)Dewald Basson Wrote:  Trialling arm bush limiters, speak to mr. Axis. I got set from him which is on the e46.

I'm getting powerflex bushes for the front and the M3 balljoints for the two rears (from Axis).

So far replacing the bushes on the front suspension has been a relatively straight forward task using a hacksaw and a blow torch. After seeing the pain that Captain Stealth went through with removing the old bushes of the trailing arms I think I must just take the arms to my buddy with the hydraulic press and be done with it.
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Captain_Stealth (01-17-2017)
Yesterday, 06:09 AM
Post: #32
Longdrop E36 328i Track Car
If I was you I would def get the black series trailing arm bushes


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Yesterday, 06:28 AM
Post: #33
Longdrop E36 328i Track Car
(Yesterday 06:09 AM)Captain_Stealth Wrote:  If I was you I would def get the black series trailing arm bushes


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Yes that is what I ordered for the front one. For the rears I'm getting the balljoints.



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Yesterday, 06:35 AM
Post: #34
Longdrop E36 328i Track Car
(Yesterday 06:28 AM)AudiDriver Wrote:  
(Yesterday 06:09 AM)Captain_Stealth Wrote:  If I was you I would def get the black series trailing arm bushes


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Yes that is what I ordered for the front one. For the rears I'm getting the balljoints.



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Excellent. Been looking at my thread hey lol


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Yesterday, 06:54 AM
Post: #35
Longdrop E36 328i Track Car
All of it - pain shared is pain halved. Bluebiggrin

It would be an injustice to the suffering of one man if others were not to learn from it...


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Captain_Stealth (01-17-2017), JayDrft (01-17-2017)
Yesterday, 06:59 AM
Post: #36
Longdrop E36 328i Track Car
(Yesterday 06:54 AM)AudiDriver Wrote:  All of it - pain shared is pain halved. Bluebiggrin

It would be an injustice to the suffering of one man if others were not to learn from it...


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Haha. The only bushes that are not poly are the rear sway bar other that that everything has been replaced


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