My compound turbo set-up

[deth2u]

You're 2.0l, right? The boost threshold is slightly lower than mine on an S300 and 2.4l stroker with a cammed 1g head


Hats off to ya, what an awesome setup. Made on the cheap too

 

[natertater]

a turbo is not a volume multiplier. that would be impossible. a turbo multiplies pressure. volume is reduced in size. the opposite of multiplication. mass does not change. whatever mass goes in a turbo must come out.

and what happens when you multiply pressure to say, double that of the same area (intake manifold for instance) when you increase pressure (full purpose of FI) it creates more volume of air. you are compacting that ratio, no matter what amount in and out, into a smaller space, which is actually increasing the air volume that space could originally hold, right? im not saying the flow in has to equal flow out, im saying STOP NUKING IT! as far as i know, neither one of you went to MIT, so stop arguing the point, you are ruining half the thread (at least pages 2-5) but this thing will work. i have no doubt in that. oh i got to page 13 and it does run! also, you dont need 1400 lb-ft of torque to turn tires in an off road vehicle going INTO the the axle to make 1400 after, do you? its a mulitplier also...

 

[Kevin Jewer]

I saw pictures of your car at the SO Paul, did you run it?!

 

[viperlp01]

No he didnt... I tried to get ride but the drinks got in the way ... My buddy travis said it is the fastest thing he has every been in ... He didnt even try the dyno because buschurs dyno is not designed for lowered cars... I couldnt make it on, my exhaust flange caught the lip of the dyno

 

[99gst_racer]

You're 2.0l, right? The boost threshold is slightly lower than mine on an S300 and 2.4l stroker with a cammed 1g head


Hats off to ya, what an awesome setup. Made on the cheap too

Yup. Still rocking a 2.0L 7-bolt.

I saw pictures of your car at the SO Paul, did you run it?!

No, I didn't run it. I drove the car to Ohio, and didn't have a trailer lined up in case I broke it on the track. My dyno day is 2 weeks out. I'll be taking it to my local track shortly after that.

How did yours do at the Showdown, Kevin?

No he didnt... I tried to get ride but the drinks got in the way ... My buddy travis said it is the fastest thing he has every been in ... He didnt even try the dyno because buschurs dyno is not designed for lowered cars... I couldnt make it on, my exhaust flange caught the lip of the dyno

Yeah, I still owe you a ride in it, John.

 

[Kevin Jewer]

I had traction problems all day, never got a full run without lifting. Coasted to some low 10s at 100 mph. It went 8s the friday before though, so I'm dying to see some good results on your setup as well. I can understand not running it without a trailer with the unkowns that come with the low rpm boost.

 

[viperlp01]

what the hell happened to you and your crew that night Paul...? They all disappeared like instantly or that could have been the SoCo messin

 

[wishihadatalon]

This car is too much fun. Paul gave me a ride at the shootout and all I can say is damn. 1st and 2nd gear are insane. To all of the people who thought that it wouldn't work, haha

 

[Kevin Jewer]

To all of the people who thought that it wouldn't work, haha

I agree. The doubters make me laugh. Here's a video showing it working pretty well on my car last week. Paul is the original here, I got the idea from him, but I had to try it myself and see what would happen. So far the results are very promising, and I can't wait to see how his car does.

This is with a 50 trim and a T6 75mm S400. Boost curve goes vertical at 4000 rpm, I leave the line with ~30 psi at 5000 rpm, no more nitrous.

YouTube - RWD Talon, first two runs on Compound Turbos

 

[dsm1212]

wow that was insane

 

[vanilla gorilla]

Kevin...

vanilla gorilla from AF.

I did not know that you had converted your car to compound setup. You need to keep us updated over there.

 

[LandoAWD]

They need to shut that place down.

 

[Slippi84]

Yeah kevin looked like he was giving people a head start at still competing at the showdown

 

[mnetwork]

Kevin...

vanilla gorilla from AF.

I did not know that you had converted your car to compound setup. You need to keep us updated over there.

I didn't know either. That was a great video... Could you post some pics of the engine bay??

 

[Kevin Jewer]

I didn't do a very good job documenting this project, and it went through several revisions, but some random pics are here. Most of them were to help JMF make the manifold, add wastegates, etc.

Junk pictures by kjewer1 - Photobucket

 

[mnetwork]

I didn't do a very good job documenting this project, and it went through several revisions, but some random pics are here. Most of them were to help JMF make the manifold, add wastegates, etc.

Junk pictures by kjewer1 - Photobucket

I didn't really look at Paul's setup closely, but I got a good look at yours now. So the t3 get's exhaust gas and passes it on to the t6 turbo. When the t3 turbo's wastegate opens it just bypasses the t3 and goes straight to the t6. When does the first wasegate at the t3 open? The t3 pulls air from the t6? So air from the t6 gets recompressed by the t3? Just trying to figure out exactly whats going on.

 

[endeffect0]

so.. couldn't help but notice that sept 3rd has past... did you ever get some dyno time in?

 

[Kevin Jewer]

I didn't really look at Paul's setup closely, but I got a good look at yours now. So the t3 get's exhaust gas and passes it on to the t6 turbo. When the t3 turbo's wastegate opens it just bypasses the t3 and goes straight to the t6. When does the first wasegate at the t3 open? The t3 pulls air from the t6? So air from the t6 gets recompressed by the t3? Just trying to figure out exactly whats going on.

There's more detail on the concept itself early on in the thread, but that's pretty much correct. In my case, the big turbo compresses the air 2 to 1. Then the small turbo compresses it again 2 to 1. The pressure ratios multiply so you get 4 to 1, or 45 psi in the manifold. The small turbo wastagates around 28 psi. The large turbo is making 17. Actual PRs are 1.8 and 2.2.

 

[RipperXX]

so.. couldn't help but notice that sept 3rd has past... did you ever get some dyno time in?

What he said.

 

[wishihadatalon]

What he said.

I think he was having too many little issues with it to make it to the dyno. Don't worry though, he is still heavily motivated to make it to the dyno and the track this year before snow falls.

 

[99gst_racer]

Yeah, the trip to the dyno never happened. I had a series of issues one week before I was supposed to make the trip to the rollers.

I found a 4" crack in my magnus SMIM, so I had it repaired. I reinstalled the manifold the day before the dyno day, and took the car for a spin. During the first 3rd gear pull, it developed a nasty boost leak due to a failed Magnus heat barrier gasket (it was bad enough to hear it from the driver's seat, and it was also causing a 2K idle). Minutes later, after one backroad holeshot, the car developed clutch issues. It was one thing after another.

I currently have the tranny sitting on the garage floor, awaiting delivery of a clutchnet disk on Tuesday of next week. And I already have an OE stamped steel gasket to replace the Magnus gasket. My goal is to reschedule the dyno trip for sometime during the week of the 21st. Then, a trip to Normal, IL for the MOD event on the 26th, then to the dragstrip on Oct 3rd.

 

[daren_p]

What happened to the Fidanza disk? Guess your out of warranty? What clutchnet disk are you going with?

 

[habitatguy187]

And I just bought one of those magnus gaskets.... a used one.

 

[99gst_racer]

What happened to the Fidanza disk? Guess your out of warranty? What clutchnet disk are you going with?

Astonishingly, nothing was wrong with it. It actually looks really good. I did, however, discover than my tranny was partially misaligned with the crank. The rear section was not fully seated over the dowel pin. I'm not sure if that was the issue, or what issues even arise from misalignment. There's no abnormal wearing on the clutch disk, pressure plate, or flywheel. But off-idle and low rpm engagement really sucked. After seeing the clutch, I find it almost impossible to blame any of the engagement issues on the clutch.

Nevertheless, I'm going to put in an ACT 2600 pressure plate and a clutchnet sprung-hub, 6-puck disk in it this time. Not that the Fidanza wasn't doing the job, I just think this new combination should be better suited for the torque of my current turbo set-up.

And I just bought one of those magnus gaskets.... a used one.

Ha, hopefully you have better luck than I did. This was the second failure within the past year. There won't be a chance of a third.

 

[daren_p]

Well thats good to hear, was hoping it wasn't another case of the disk puking out its springs, otherwise I'd be starting to worry

Why don't you just go with the 2900 PP? It seems everyone says less pedal pressure then the 2600 (must have changed the pivot point geometry like a CFDF clutch or something?) & more clamping power. There's also that Southbend disk (I believe thats the manufacturer, the one Tim Z always praises) that should work well for the kind of abuse you'd put it through. Is the clutchnet disk the ones thats basically encased the springs in their sprung 6 pucks disks? Seems like a good idea to me.