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Dyno result for the risky business Porsche

General engine tech -- Drag Racing to Circle Track

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n2xlr8n
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Re: Dyno result for the risky business Porsche

Post by n2xlr8n » Sat Jul 13, 2019 11:43 am

ptuomov wrote:
Sat Jul 13, 2019 10:47 am
Actually, a custom part but based on RU1500 cross section.

Thank you.
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Re: Dyno result for the risky business Porsche

Post by Roundybout » Sat Jul 13, 2019 8:03 pm

That engine bay is sweet, there's a lot going on there the casual observer wouldn't notice. The engineers didn't waste an inch of space and you have got a lot more in there efficiently.

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Re: Dyno result for the risky business Porsche

Post by ptuomov » Sun Jul 14, 2019 11:53 am

Roundybout wrote:
Sat Jul 13, 2019 8:03 pm
That engine bay is sweet, there's a lot going on there the casual observer wouldn't notice. The engineers didn't waste an inch of space and you have got a lot more in there efficiently.
John Kuhn has done a great job stuffing ten pounds of shit in that five pound bag. And it actually fits with a clearance and looks nice. A case in point, the MAF sensor connectors have the required good clearance for the engine to rock and roll on the motor mounts:
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Re: Dyno result for the risky business Porsche

Post by ptuomov » Mon Jul 15, 2019 6:09 am

Another video. The cars been fired up since the video was shot:


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Re: Dyno result for the risky business Porsche

Post by Leftcoaster » Mon Jul 15, 2019 9:29 am

ptuomov wrote:
Mon Jul 15, 2019 6:09 am
Another video. The cars been fired up since the video was shot:
Beautifully engineered with workmanship of the highest order - - I trust any further challenges will be limited to scraping the figurine off the intake pipework #-o - - thanks for posting such a challenging project =D>


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Re: Dyno result for the risky business Porsche

Post by ptuomov » Mon Jul 15, 2019 1:18 pm

Leftcoaster wrote:
Mon Jul 15, 2019 9:29 am
ptuomov wrote:
Mon Jul 15, 2019 6:09 am
Another video. The cars been fired up since the video was shot:
Beautifully engineered with workmanship of the highest order - - I trust any further challenges will be limited to scraping the figurine off the intake pipework #-o - - thanks for posting such a challenging project =D>
Everybody involved with the project is working a day job and/or bootstrapping a startup or owning a chunk of a company, so progress is slow for obvious reasons. For equally obvious reasons, the project will never finish as it’s just a hobby science experiment that will march from one bottle neck to another. But it’ll get driven a bunch this summer and fall before going to pieces again.

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Re: Dyno result for the risky business Porsche

Post by ptuomov » Mon Jul 15, 2019 1:23 pm

Kevin Johnson wrote:
Mon Jul 15, 2019 1:17 pm
Brünhilde De Mornay
Yes, but also


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Re: Dyno result for the risky business Porsche

Post by ptuomov » Tue Jul 16, 2019 10:29 am

Drivable again, about four weeks of part-time work left to get it completely buttoned up:
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Re: Dyno result for the risky business Porsche

Post by ptuomov » Sun Jul 21, 2019 4:48 pm

vannik wrote:
Wed Jul 10, 2019 1:56 am
That is interesting, as well as the change to a Y-connection. I see in the simulation of this setup that with the junction box it is very difficult at lower rpm values to speed up both turbochargers because one has enough capacity to generate the required boost. Then the wastegates open to control the boost from one turbocharger and the other one does not speed up. It can even see reverse flow. The Y-junction goes a long way in resolving this but also where you get the wastegate control signal from is important. I know it is "only" a simulation but it seems to point at what is being done now.
Here's the mass flow per side from the tests last year, just found the graph. Even with the old box, the sides flowed pretty symmetrically and in the right direction:
balancegraph.png
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Re: Dyno result for the risky business Porsche

Post by ptuomov » Tue Jul 23, 2019 8:41 am

Strapped on the dyno and back to tuning after a year of detour with the transmission:
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Re: Dyno result for the risky business Porsche

Post by ptuomov » Tue Jul 23, 2019 9:06 pm

John's update on dyno wiring:


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Re: Dyno result for the risky business Porsche

Post by Kevin Johnson » Tue Jul 23, 2019 9:48 pm

Has the seal stayed in place on the tranny?

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Re: Dyno result for the risky business Porsche

Post by ptuomov » Tue Jul 23, 2019 9:57 pm

Kevin Johnson wrote:
Tue Jul 23, 2019 9:48 pm
Has the seal stayed in place on the tranny?
Yes. No more “tranny surprises” when it’s gotten hot and heavy.

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Re: Dyno result for the risky business Porsche

Post by ptuomov » Sat Aug 03, 2019 4:22 am

Continuing shakedowns and tuning on pump gas. This is a 16 psi run, giving about 715 rwhp:
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