World's First 2JZ with M4 DCT Swapped E30

[AusScare]

Did I miss which axles you're running? Keen to see what you think will handle the punishment!

[SLEEPYDUB]

I never thought about a DCT being able to have a clutch. I know it's not a traditional clutch like most manual cars are. Does this work similar to the modern brakes on BMW's? As in it's basically a button you press with your foot and the computer (for lack of a name for the component) decides how much pressure to apply based on your input.

In a sense yes that's how it will work. It wasn't ever designed to do this from the factory, but we can manipulate the mechatronics to perform this task.

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[SLEEPYDUB]

Did I miss which axles you're running? Keen to see what you think will handle the punishment!

So right now we have a stock set.
I have some oldschool CA Tuned "chrimoly" axles as a backup set when these break.
Once those are done, I will be using some adapters on the wheel hub that allow the use of E34 axles. Have heard good things on that conversion, so hoping that keeps me from having to do a 210mm and 5lug swap.

For the record, my last 2JZ E30 with a 5speed went 10.90@136 on stock axles, still 4lug. I think we will get a pretty easy 9sec pass out of the stock stuff if I back half the track

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[hozzziii]

The way you handle the clutch is basically the same thing that Koenigsegg does in that new CC850 with their "LST" or Light Speed Transmission.
They use clutch plates on the gears themselves rather than on a flywheel, and it's got three shafts instead of the usual two and overall adds up to 9 gears.

The way it works is whatever ratio you're going for, at any time two sets of gears are engaged by their clutch packs, except in reverse but yeah.

Anyway, so they just made this whole shift "linkage" and a dummy clutch pedal on this new car to simulate a manual transmission.
The clutch pedal disengages the trans, but as you push the shift lever the car knows which "gear" the shifter is going to. So it knows the ratio you're going for and which gears need to be engaged.
So as you push the shifter the first of the two clutch packs engages but it waits for you to drop the clutch pedal to release the second clutch pack and then you're in gear and driving!

I went into too much detail didn't I?

Anyway I just thought it was cool how you handle the clutch and reminded me of that. Cool project!
I hate that valve cover though.

[AusScare]

So right now we have a stock set.
I have some oldschool CA Tuned "chrimoly" axles as a backup set when these break.
Once those are done, I will be using some adapters on the wheel hub that allow the use of E34 axles. Have heard good things on that conversion, so hoping that keeps me from having to do a 210mm and 5lug swap.

For the record, my last 2JZ E30 with a 5speed went 10.90@136 on stock axles, still 4lug. I think we will get a pretty easy 9sec pass out of the stock stuff if I back half the track

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I have those same CATuned axles, but no motor in yet to test if they are any good. Crazy that you had stock axes going10.9! That gives me hope. What's the secret to keeping them alive, just don't do anything stupid? All new suspension/bushings?

[It's Soda Not Pop]

The way you handle the clutch is basically the same thing that Koenigsegg does in that new CC850 with their "LST" or Light Speed Transmission.
They use clutch plates on the gears themselves rather than on a flywheel, and it's got three shafts instead of the usual two and overall adds up to 9 gears.

The way it works is whatever ratio you're going for, at any time two sets of gears are engaged by their clutch packs, except in reverse but yeah.

Anyway, so they just made this whole shift "linkage" and a dummy clutch pedal on this new car to simulate a manual transmission.
The clutch pedal disengages the trans, but as you push the shift lever the car knows which "gear" the shifter is going to. So it knows the ratio you're going for and which gears need to be engaged.
So as you push the shifter the first of the two clutch packs engages but it waits for you to drop the clutch pedal to release the second clutch pack and then you're in gear and driving!

I went into too much detail didn't I?

Anyway I just thought it was cool how you handle the clutch and reminded me of that. Cool project!
I hate that valve cover though.

That makes a lot of sense.

[Panici]

So as you push the shifter the first of the two clutch packs engages but it waits for you to drop the clutch pedal to release the second clutch pack and then you're in gear and driving!

So you're slipping the clutch packs every time you use the pedal?

I'd be concerned with long-term reliability, seems like a clutch pack will be a lot less tolerant to clutch kicks, launching, general abuse compared to a traditional flywheel and clutch setup. Harder to service as well.

[Drewdat]

ESR 16x9 Mesh Wheels (Soon to be 16x9.5 -20et Work VSKF)
225/45/16 R888R (probably going to 245 soon)

Are you planning on 245/45 up front or just the rears? Are you currently running spacers with the ESR 16x9 wheels?

[hozzziii]

So you're slipping the clutch packs every time you use the pedal?

I'd be concerned with long-term reliability, seems like a clutch pack will be a lot less tolerant to clutch kicks, launching, general abuse compared to a traditional flywheel and clutch setup. Harder to service as well.

I mean I don't know how it will resist abuse compared to normal clutch and flywheel. I dunno what materials they're using.

My mind goes to wet clutch packs like in differentials.
I also saw a video about some drag racers using wet clutch packs inside automatic transmissions so that you get that locked on acceleration like a manual, but the smooth shifts of an automatic.
It was on High Performance Academy's channel.

But you can bet that servicing that thing will be a pain for sure.

[SLEEPYDUB]

I have those same CATuned axles, but no motor in yet to test if they are any good. Crazy that you had stock axes going10.9! That gives me hope. What's the secret to keeping them alive, just don't do anything stupid? All new suspension/bushings?

I just didnt launch it hard and backed halfed the rest of the track. 60ft was only a 1.9 so nothing crazy.

So you're slipping the clutch packs every time you use the pedal?

I'd be concerned with long-term reliability, seems like a clutch pack will be a lot less tolerant to clutch kicks, launching, general abuse compared to a traditional flywheel and clutch setup. Harder to service as well.

Only very briefly, just like a regular clutch. This is only really for clutch kick scenarios. The clutches dont wear the same as a traditional clutch pack, and it uses fluid pressure to apply the clutches, not a pressure plate, so it has a super high clamping force. Also, changing clutches in a DCT is not hard. Just remove the basket and replace them. Pretty simple actually.

Are you planning on 245/45 up front or just the rears? Are you currently running spacers with the ESR 16x9 wheels?

Front for the street will keep a 205/45/16. I do have a new drag pack for the car for the drag strip using a 23x5x15 Hoosier skinny and a 24.5x8x15 ET Drag for the rear.

I mean I don't know how it will resist abuse compared to normal clutch and flywheel. I dunno what materials they're using.

My mind goes to wet clutch packs like in differentials.
I also saw a video about some drag racers using wet clutch packs inside automatic transmissions so that you get that locked on acceleration like a manual, but the smooth shifts of an automatic.
It was on High Performance Academy's channel.

But you can bet that servicing that thing will be a pain for sure.

Servicing the trans is actually quite easy. Doesn't take much time to pull it, i think we've got it down to 45 minutes now.
Once out, its just a few bolts and a large snap ring to get the front cover off, and pull the clutch baskets.
Once clutch basket is out, its just like stacking leggo blocks. Nothing to it.

[SLEEPYDUB]

Updates via YouTube

Part 12

https://youtu.be/OVDMfBaU5CA

Part 13

https://youtu.be/T96DJvCf9vg

Part 14

https://youtu.be/7c7PangWt0U

Part 15
https://youtu.be/cz1Lx15bMZQ

[SLEEPYDUB]

I recently put a draggy on it.

On this pass I was only running 1psi of boost.
93 octane, no VVTi enabled yet, street tires, full weight, left off the brake.
13.50 @ 107.64mph and let off just before the end.



Next run was on 9-10psi, just swapped in a 9psi wastegate spring and it made between 9-10psi during the pulls.
93 octane, VVTi enabled, spinning all of 1st and 2nd hard, street tires, full weight left off the brake, and you can see very clearly at the end of the run where i let off again misjudging the 1/4 mile.
11.74 @ 121.51mph



Here is the YouTube video on the 1psi pass. I didn't record the 10psi run yet. I'm going to put my drag pack on it soon and see if I can accomplish two goals. First being that I want to go 10s on 93 octane, I think it will only take 13psi to do that. Next goal will be to go 10s on 10psi and E85. That will be a little harder, but with the drag pack and the extra power from Ethanol, I may stand a chance. We will see. After that, it's 9s on 4lug 😜.

Part 16 - 1/4 Mile Test on 1psi of BOOST

https://youtu.be/g6fIS7ieRq0

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[SLEEPYDUB]

Couple updates.

Traction is an issue, but have some 60-130 times for it.

10psi on 93 went 9.40
20psi on 93 went 6.65

I am now on E85 and haven't had a chance to run any times yet, but im tuned up to 30psi and its mental.
Should have some times soon

[zwill23]

30psi on a stock bottom end is outrageous to me, hopefully you get those traction issues sorted soon. Glad to see this back on the road!

p.s. This is Zach with the beat up black E30 w/M20 turbo you tuned a while back, head is built now and the engine is still going strong!

[SLEEPYDUB]

30psi on a stock bottom end is outrageous to me, hopefully you get those traction issues sorted soon. Glad to see this back on the road!

p.s. This is Zach with the beat up black E30 w/M20 turbo you tuned a while back, head is built now and the engine is still going strong!

Zach what's up man! Glad to hear it's doing well! I've got my built 2.9L stroker for sale if you want to throw some big power at it!

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