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Warm up Regulator (rebuild and making adjustable)
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Joined: 29 Jul 2001
Posts: 8758
Location: Royal Oak, MI, USA

PostPosted: Mon Nov 07, 2022 9:54 pm    Post subject: Reply with quote

Finally got off my butt and did this to the #77 IT/HP racecar. Haven't dialed it in on dyno or track yet, just played with the adjustment in the garage. Yeah, definitely a pretty coarse adjustment, but beats having none for so long...

...and it was so easy, comparatively... just as in the pics that Dan posted, but I didn't even bother disconnecting mine, just removed it from the manifold and drilled it on the strut tower by hand. Coulda done it trackside if I'd have been interested (and should've). Since this style has a bolt, and it's the nut not the bolt that's turned to provide the force to move it, you don't need the roll pin described in the original tech article.

But yeah, needs quite a serious whack on the bolt with a hammer to move richer, and a lot of torque on the nut to lean it back out.

A lot cheaper, easier, and faster than an EFI conversion, but definitely just a small bump to the efficiency of the thing.
Vaughan Scott
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype
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Carrera RSR  

Joined: 08 Jan 2010
Posts: 2299
Location: Somerset, UK

PostPosted: Tue Nov 08, 2022 12:49 am    Post subject: Reply with quote

Fasteddie313 wrote:
CarreraRSR did

WUR tuning is so course though..
You know what I would do..

Yep......relocated WUR to top of the intake manifold like the GTS, also made WUR adjustable also for easy adjustment. Not as described here. Its done through the brass cap on the bottom of the unit. Just a quick twist of an Allen key one way or the other the richen/lean off. Super easy
1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
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