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Carbon Emitter
Join Date: Feb 2004
Location: Socialist Republic of California
Posts: 2,129
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‘76 930 wastegate adjusted all the way out...why and what to do.
I’m helping a friend who inherited a long stored, very original ‘76 930. After going through the entire fuel system, I noticed the wastegate was adjusted all the way out. Why would someone adjust it this way? What should I do to correct it before running the engine?
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03-22-2018, 05:43 PM
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Registered
Join Date: Sep 2004
Location: Tonawanda NY
Posts: 964
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Rawknees is the only guy I ever known to be sticking straight out like that. That thing will poke your eye out. And clearly unprotected. Be careful, he's real dangerous when he gets excited like that.
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82 930 Pearl White 3.3 964 cams, K27 HF, Kokeln, fuel enriched, IA fuel head mod, wur mod, crankfire, 2X plug, Aase worked heads. 1bar, GHL, zork, 23/33 bars, low, loud Last edited by slyguy; 03-22-2018 at 06:05 PM.. |
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03-22-2018, 06:01 PM
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Registered
Join Date: Sep 2004
Location: Tonawanda NY
Posts: 964
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That's not a factory adjustment (there is none), it is a bolt plugging the boost vacuum port
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82 930 Pearl White 3.3 964 cams, K27 HF, Kokeln, fuel enriched, IA fuel head mod, wur mod, crankfire, 2X plug, Aase worked heads. 1bar, GHL, zork, 23/33 bars, low, loud |
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03-22-2018, 06:04 PM
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Mighty Meatlocker Turbo
Join Date: Apr 2016
Location: North TexASS
Posts: 18,538
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That is a homemade boost controller. Normally that port is vented to atmosphere (allows the diaphragm to move under air pressure supplied to the side of the bell). Originally there was a metal tube screwed down there that went up through the engine tin and into the engine bay (to keep water from getting in there). One simple thing you can do is put a hose barb fitting in place of that nut/bolt combination and then run a hose up and into the engine compartment.
By the way, someone made that modification in order to run higher than stock boost - not a good idea if nothing was done to monitor and adjust fueling (onboard AFR gauge and adjustable WUR). |
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03-22-2018, 06:05 PM
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Mighty Meatlocker Turbo
Join Date: Apr 2016
Location: North TexASS
Posts: 18,538
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03-22-2018, 06:06 PM
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Registered
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Location: Tonawanda NY
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Quote:
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82 930 Pearl White 3.3 964 cams, K27 HF, Kokeln, fuel enriched, IA fuel head mod, wur mod, crankfire, 2X plug, Aase worked heads. 1bar, GHL, zork, 23/33 bars, low, loud |
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03-22-2018, 06:12 PM
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Mighty Meatlocker Turbo
Join Date: Apr 2016
Location: North TexASS
Posts: 18,538
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03-22-2018, 06:26 PM
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Registered
Join Date: Sep 2004
Location: Tonawanda NY
Posts: 964
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Quote:
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82 930 Pearl White 3.3 964 cams, K27 HF, Kokeln, fuel enriched, IA fuel head mod, wur mod, crankfire, 2X plug, Aase worked heads. 1bar, GHL, zork, 23/33 bars, low, loud |
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03-23-2018, 07:31 AM
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1986 944 turbo -first car 1997 993 Cab 6 speed-sold 1992 964 C2 turbo SOLD, 911GT ,CIS, 428 fwhp 450 trq, Carrillo rods, 964 cams, TT retainers,7.5 comp 1.1 bar boost 320 ml black fuel head 009 injectors, 044 pumps, 60-1 T4/T3 dual scroll turbo |
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03-23-2018, 08:10 AM
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‘76 930 wastegate adjusted all the way out...why and what to do.
Extremely dangerous place to ask for advice.
The answer is seldom what you expected with this group. Sent from my iPhone while Driving
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Derrick |
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03-23-2018, 09:34 AM
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Carbon Emitter
Join Date: Feb 2004
Location: Socialist Republic of California
Posts: 2,129
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Haha I don’t mind the funny replies.
Thanks for the helpful info Rawknees...I’ll replace the bolt with a barb as you suggested. The wastegate internals won’t be affected by converting back, correct? Last edited by jkarolyi; 03-23-2018 at 08:12 PM.. |
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03-23-2018, 07:26 PM
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Mighty Meatlocker Turbo
Join Date: Apr 2016
Location: North TexASS
Posts: 18,538
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The purpose of that bolt is to limit the amount of movement from the diaphragm, and thus the spring and valve, buy blocking, or lessening, the flow of air out of the "bell" (the topside of the diaphragm) - a crude boost controller/increaser. Quote:
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03-23-2018, 09:47 PM
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Join Date: Jun 2008
Location: Yamhill OR.
Posts: 455
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That will up the spring pressure to increase boost. It will add more preload on the spring. But it still needs to be vented or it can be erratic. I drilled a hole through the bolt. Did this for years
Last edited by turbo nut; 03-24-2018 at 07:15 PM.. |
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03-24-2018, 07:12 PM
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Blackbird
Street Beast
1996 Ford Mustang
07 GT3RS
