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Discussion Starter · #1,001 ·
Hi Folks

Just a mini update.

Have paid the import taxes via UPS for the Drexler Diff. I'm just waiting for a confirmed delivery date which Im guessing should be early next week.

As always, I will post pics.

Stay tuned....

Micky
 

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Sorry if i missed it somewhere in the 50+ pages.. I am wondering if you have or plan to make any oiling mods to the engine ? Different oil sump or ad extra baffles to the OEM sump ? With the cornering ability and added power I wound be worried about oil starvation any data on what the jouner cup cars run ? maybe the OEM sump can cope with the g-forces.
 

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Discussion Starter · #1,004 ·
Sorry if i missed it somewhere in the 50+ pages.. I am wondering if you have or plan to make any oiling mods to the engine ? Different oil sump or ad extra baffles to the OEM sump ? With the cornering ability and added power I wound be worried about oil starvation any data on what the jouner cup cars run ? maybe the OEM sump can cope with the g-forces.
Hi Lasse

I really appreciate your interest and questions.

To be honest, I hadn't considered any oiling mods but you have made a very valid point there!

I would welcome any advice on this. I have chosen MacG Racing to build the car so I could always ask their advice..:unsure:

The Junior Cup cars are re mapped to 140 BHP.

Thanks

Micky
 

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Hi Micky

Thanks for your response

I am no expert but have I seen what oil starvation does to an engine..

So the Junior Cup cars are a lot less power, but with the suspension and tires they are running, combined with the amount of track time does cars see, my thinking is that whatever they are running in terms of oil sump should be a safe bet.

It could be that the OEM sump is just fine, but with the amount of time effort and money you are investing in this project I guess it would be nice to know for sure.
 

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Discussion Starter · #1,006 ·
Hi Micky

Thanks for your response

I am no expert but have I seen what oil starvation does to an engine..

So the Junior Cup cars are a lot less power, but with the suspension and tires they are running, combined with the amount of track time does cars see, my thinking is that whatever they are running in terms of oil sump should be a safe bet.

It could be that the OEM sump is just fine, but with the amount of time effort and money you are investing in this project I guess it would be nice to know for sure.
Thanks Lasse

I will mention it to MRD who run the Junior Cup series and also MacG Racing....(y)

Micky
 

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Discussion Starter · #1,009 ·
COMETH THE DAY COMETH THE DREXLER DIFFERENTIAL

Hi Folks

I am super happy to announce the arrival of the racing diff by Drexler Engineering!

It's been a long haul to get it but I believe it is a game changer for the project and will raise the bar significantly on the overall performance of the UP GTI.

Please see the pics i have uploaded and I look forward to your responses!

In terms of the project,I just need the upgraded brakes, which I can buy off the shelf and I can speak to macG racing to book the car in for the underside part of the build...

Thanks for keeping the faith!

Micky
 

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Cool. I assume it must have slip clutches and pre-calibrated spring/pressure plate pressures.
Is there any setting-up you have to do to it from track testing?
 

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Discussion Starter · #1,013 ·
Hi Steve

my understanding is that it has been designed from scratch for the Up GTI but I understand that it has settings as required. In that case I may just have an every day fast road setting and alter it on any Track scenario 😊
Micky
 

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Err, if it's like any other slip-clutch LSD Micky, (and outwardly it looks very similar), that means dropping the diff every time and amending the amount of plates therein ! Don't think you'll be wanting to do that before and after any track day.....
 

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Discussion Starter · #1,015 ·
Err, if it's like any other slip-clutch LSD Micky, (and outwardly it looks very similar), that means dropping the diff every time and amending the amount of plates therein ! Don't think you'll be wanting to do that before and after any track day.....
Thanks 911

I found this paragraph on a BMW forum regarding the Drexler.

i build these units myself based on drexler hardware. the m2 lsd housing is different from e46 and e92 and is not compatible. i have some drexler m2 lsd units available that i can build to any spec you want. 2-way, 1.5-way, 1-way.

these units are based on the m4 gt4 factory racecar diff that also comes with a drexler lsd core. i change the setup for longer rebuild intervals and less aggressive reaction. so my unit is 100% usable in everyday street driving without any noticeable compromise in performance.
it always depends on how the car is being used and what you expect from your lsd. when i have some information from the customer i can suggest (and build) an individual setup that fits the specific needs (and fits into the budget).
i am doing this business (setting up and installing custom lsd cores for street and racecars) since quite a while and did over 1.000 units so far.
so in this m2 lsd i put pretty much of my knowledge and research i did so far.

Cheers
Micky
 

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Thanks 911

I found this paragraph on a BMW forum regarding the Drexler.

i build these units myself based on drexler hardware. the m2 lsd housing is different from e46 and e92 and is not compatible. i have some drexler m2 lsd units available that i can build to any spec you want. 2-way, 1.5-way, 1-way.

these units are based on the m4 gt4 factory racecar diff that also comes with a drexler lsd core. i change the setup for longer rebuild intervals and less aggressive reaction. so my unit is 100% usable in everyday street driving without any noticeable compromise in performance.
it always depends on how the car is being used and what you expect from your lsd. when i have some information from the customer i can suggest (and build) an individual setup that fits the specific needs (and fits into the budget).
i am doing this business (setting up and installing custom lsd cores for street and racecars) since quite a while and did over 1.000 units so far.
so in this m2 lsd i put pretty much of my knowledge and research i did so far.

Cheers
Micky
Micky, what he's saying here has nothing to do with ease of changing the"severity" of the LSD action. He's just saying he builds them out of BMW bits, and that he can set it up for serious competition, or much less aggressive for road use with occasional track days.
So you won't be doing easy changes of plates in the LSD before and after trackdays, as I said above.
He's saying he can build it to your requirements, so either a soft action for the road, or a very hard action for the track. You can't have both, changing the action, means removing the diff and changing the number of plates inside, every time .
Also bear in mind that plate type LSD's wear out quite quickly.
A ZF LSD typically used in historic cars such as Escorts, Opel Manta's, Ascona's, Kadetts, Hillman Avengers Alfa's etc will typically last 5000 miles in competition, and they begin to lose their effectiveness in about 15000 miles of road driving . The friction surface on the plates wear out.
After that they need a rebuild to restore the effectiveness of the limiting factor.
Ask any owner of a 105 series Alfa 2000 GTV, they all came with a ZF type LSD as standard.
The plate type LSD's are all adjustable for effectiveness, the common ZF types are set for the road at 25%, by inserting more plates, you can get 75% effectiveness.
In my experience, having had both, you wouldn't want to use a 75% lsd on the road. I've attached an exploded view of a typical Drexler diff, that is constructed very similar to the ZF and Salisbury type "clutch plate" mechanically operated ones.
Food Sushi Gimbap Ingredient Recipe
 

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Micky, what he's saying here has nothing to do with ease of changing the"severity" of the LSD action. He's just saying he builds them out of BMW bits, and that he can set it up for serious competition, or much less aggressive for road use with occasional track days.
So you won't be doing easy changes of plates in the LSD before and after trackdays, as I said above.
He's saying he can build it to your requirements, so either a soft action for the road, or a very hard action for the track. You can't have both, changing the action, means removing the diff and changing the number of plates inside, every time .
Also bear in mind that plate type LSD's wear out quite quickly.
A ZF LSD typically used in historic cars such as Escorts, Opel Manta's, Ascona's, Kadetts, Hillman Avengers Alfa's etc will typically last 5000 miles in competition, and they begin to lose their effectiveness in about 15000 miles of road driving . The friction surface on the plates wear out.
After that they need a rebuild to restore the effectiveness of the limiting factor.
Ask any owner of a 105 series Alfa 2000 GTV, they all came with a ZF type LSD as standard.
The plate type LSD's are all adjustable for effectiveness, the common ZF types are set for the road at 25%, by inserting more plates, you can get 75% effectiveness.
In my experience, having had both, you wouldn't want to use a 75% lsd on the road.
If only there was a fit and forget solution from a manufacturer like Quaife that would just be a solid fast road/track option 🤔😂
 

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I had a quaife diff on my last car and it was spot on for occasional track use and road use. It was fitted with around 30k miles on the car until I traded it in for the up Gti when it had 185k miles . It was faultless.
I think Micky boy must be a very serious track warrior to fit a plated diff and all the other planed mods.
One thing I learned with my old extensively modded car the more track focused it became the worse it was for road use so you’ve got know exactly what your getting in to .
 
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