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Registered
Join Date: Feb 2004
Location: NJ
Posts: 122
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89 octane experiment
Gents,
filled up with 89 octane today in my 78 911SC Protosport 3.2 motronic turbo conversion. Motor is set at .6 bar with intercooler and Protosport fuel mapping. I've run 93 Mobil/Exxon or 94 Sunoco Ultra since the conversion was done 7 years ago. I ran the car today under boost and lugged the motor several times with no apparent problems. The car pulled strong form 1000 rpm's in 4th and 5th gears. Also rolled on the gas up a steep hill in 4th gear with no hesitation or bucking?. What gives? Anyone else running 89 succesfully?. Motor  Car with motor 
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10-10-2005, 05:01 PM
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Registered
Join Date: Aug 2003
Location: Capital Region, NY
Posts: 688
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89 OK
I use 89 octane with no problems. No knock, ping, bling. There are plenty of threads on the subject.
85 coupe - in heaven 87 coupe - in service |
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10-10-2005, 06:15 PM
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Registered
Join Date: Nov 2003
Location: Ags, Mx or McAllen, TX
Posts: 2,792
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just wait some more tanks and you'll see
get back to 93
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X/A |
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10-10-2005, 06:24 PM
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Me like track days
Join Date: Sep 2003
Location: Kirkland, WA
Posts: 10,209
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You will not hear a knock or ping on the engine........our cars - esp turbos - are notorious for NOT communicating these important 'noises'
Bring up the octane!
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ - "930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe Movie: 930 on the dyno |
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10-10-2005, 06:37 PM
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