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Old 12-24-2020, 08:20 PM   #1
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Join Date: Dec 2017
Default Frankencis on a KJet ? anyone use one?

I'm having issues with my Kjet WUR on a stock 1985 turbo.


Has anyone used one? It replaces the WUR but can also be hooked up and make the KJet tunable via Microsquirt/MS2. I know I could just change the whole thing to EFI but not sure it would pass smog in CA.

its about $400 but you also have to make a simple wiring harness and get a MS or micro to run it.

Seems to be big with the Porsche people. But on the pricey side for my Volvo. Although a rebuilt WUR ain't cheap.

Maybe a speeduino would cut the cost a little?
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Old 12-24-2020, 11:27 PM   #2
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Join Date: Jun 2014
Location: A small village of one.

Whoops! Thought you were referring to Frankincense, given the date.....
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Old 12-24-2020, 11:47 PM   #3
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Join Date: Jan 2009
Location: Fort Joe Smith, Klendathu

Myrhh is better, OEM Myrhh best.
Originally Posted by lummert View Post
Dammit, Lummert.
Originally Posted by Jesse8931 View Post
Well keep us updated on how your dumbass plan goes.
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Old 12-25-2020, 06:24 AM   #4
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Join Date: Aug 2006
Location: E(Seattle!Vancouver! San Francisco!LA!) Helsinski

One Golf rally car has wur replaced with common adjustable fuel pressure regulator. I would have that to set base control pressure and bleed that pressure lower for cold starts and high loads.

Bleeding that control pressure could be done with frequency valve and MS.
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Old 12-25-2020, 08:31 AM   #5
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Join Date: Jul 2015
Location: South Texas

I've never seen this. Scientific Rabbit used to sell a much cheaper option that would react to a wideband gauge, and had some tuneability if I remember properly. It should work on Volvo KJet.

Their website is much more vague than I remember, maybe try contacting them.
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Old 12-25-2020, 03:11 PM   #6
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Join Date: Jun 2002
Location: S NJ, a suburb of Phila.

Here is another aftermarket solution for bad control pressure regulators. https://unwiredtools.com/utcis.asp
1982 242 turbo. 338k miles. MVP coilovers and 3" exhaust. Flowed 405 with a V15. Cossie turbine housing with upgraded compressor housing. 90+, IPD remote oil filter. Some other goodness, too. Been lots of fun over 25 years. Restored in 2k. Now ready for a 2nd restoration.

1993 245 Classic, 435k miles, enem V15. IPD bars and chassis braces. Simons sport exhaust from Scandix. sbabbs ezk chip. Been a good road warrior. Genuine Volvo rebuilt leaky M47.
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Old 12-25-2020, 04:03 PM   #7
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Join Date: Oct 2008
Location: Oxnard, SoCal

The ones from Mercedes are easy to find at the wrecking yards. And with dual vacuum/pressure compensation chambers are fun to experiment with- I had one on my K-jet frankensteined from all kinds of Porsche/Audi/Volvo CIS parts. Bosch stuff is very interchangeable.
They also very easily can be made adjustable to set the baseline cold pressure.

Last edited by PCH; 12-25-2020 at 04:09 PM..
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