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924turbo_sout_africa · Joined: 29 Oct 2007 Posts: 215 Location: Sout africa

ok i know this has been answered but they now took away my lead petrol this side or put it this way i cant get it anymore haha.....can i just move over to 95 unleaded will this be fine?
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morghen · Joined: 21 Jan 2005 Posts: 9102 Location: Romania

no, use 98.
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924turbo_sout_africa · Joined: 29 Oct 2007 Posts: 215 Location: Sout africa

we only have 95 unleaded or 93 unleaded and led replacing petrol....i can get 102 octane but it will cost me R900 to fill up the tank
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Porsche ...where dreams are a reality
'79 924 turbo canada spec
'98 Formula Vee (M3 eater)

Time in the 931 is a dream come true !!

cgalyon · Joined: 05 May 2008 Posts: 249 Location: Knoxville, TN

Huh... tops we get here is like 92 octane. Somehow I'm feeling really cheated now.

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924turbo_sout_africa · Joined: 29 Oct 2007 Posts: 215 Location: Sout africa

ya but all i want to know is will unleaded work cause otherwise will have to run ....93 grrrrrgggg
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Porsche ...where dreams are a reality
'79 924 turbo canada spec
'98 Formula Vee (M3 eater)

Time in the 931 is a dream come true !!

Khal · Posted: Sat Jun 07, 2008 12:54 am Post subject:

The question has indeed been answered, many times.

I don't know of anyone who has had a problem running unleaded petrol in the 924 and 924 Turbo. I have been running unleaded petrol in my car since I bought it and haven't had a problem with it. As I understand it, most, if not all, engines with aluminium heads have hardened valve seats. This means that, as a general rule, you can safely run unleaded petrol in engines that have aluminium heads. Certainly seems to be true of the 924 and 924 Turbo.

Octane ratings are different around the world. It seems what we call 98 RON in Australia is equivalent to what the Yanks call 95 PON. See the description here, courtesy of Paul (EDIT: Sorry, looks like Ozzie posted that one, too, earlier on). You can run any grade of petrol you like in your engine. Will the lower grade petrol cause a problem? Difficult to say exactly. In the short term, the lower grade petrol being run through a 924 Turbo engine might cause 'knocking', 'pinging', 'pinking', whatever-ya-wanna-call-it. Over the long term, if this occurs constantly, it can cause major damage to your engine. But if you're getting 93 PON petrol, seems that's roughly the equivalent of 96 or 97 RON, which should be just fine...
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skemcin · Joined: 02 Sep 2003 Posts: 1284 Location: Plainfield, IL

btw, what is the fuel recommendation for a 79 924 NA?
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Khal · Posted: Sat Jun 07, 2008 1:23 am Post subject:

This chart is courtesy of Ozzie, in this thread.

EDIT: Please note the technical bulletin appears to be British. Seems different countries have different recommendations.
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924turbo_sout_africa · Joined: 29 Oct 2007 Posts: 215 Location: Sout africa

thanks man ya ouers is the same as in the us ....all i know is it can run on both 93 and 95 but it performs beter on 95 but that is unleaded only but seing as that will be fine then ...from now on that is what she will get and now and again she will get some jungle juice ..that we cal racing fuel.it's very nice 102.6 octance it's basically aviation fuel.....my car love's that
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Porsche ...where dreams are a reality
'79 924 turbo canada spec
'98 Formula Vee (M3 eater)

Time in the 931 is a dream come true !!

Khal · Posted: Mon Jun 09, 2008 4:06 pm Post subject:

924turbo_sout_africa · Joined: 29 Oct 2007 Posts: 215 Location: Sout africa

ok i see well i checked in mine now and it says a min of 93 octane is needed. so i'm sure the 95 will be fine then
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Porsche ...where dreams are a reality
'79 924 turbo canada spec
'98 Formula Vee (M3 eater)

Time in the 931 is a dream come true !!

924RACR · Posted: Mon Jun 09, 2008 10:19 pm Post subject:

Don't recall the conversion from RON to the (R+M)/2 average number (R=RON, Research Octane #, M=MON, Motor Octane #) we use on the pumps here in the US and Can, but the turbos here are perfectly happy on lower octane; I run 89 or 93 all the time without issue (stock boost).

Of course, my CR is only what, 8.0:1?

As for NA's, 87 for stock is fine... again, US/Can numbers.
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924turbo_sout_africa · Joined: 29 Oct 2007 Posts: 215 Location: Sout africa

all i knowq is mine came from canada ,when i rebuild it we pushed up the cr to 8:1 or something like that as it was 7 :1
but i found she was more responsive and much happier on 95 octane , o ya that might be because of the cam that i run as well
_________________
Porsche ...where dreams are a reality
'79 924 turbo canada spec
'98 Formula Vee (M3 eater)

Time in the 931 is a dream come true !!