Gasoline question
09-01-2001, 11:43 PM
#1
Racer
Thread Starter
Join Date: Jun 2001
Location: Atlanta
Posts: 471
Likes: 0
Received 0 Likes
on
0 Posts
Gasoline question
I'm trying to find out about Gasoline in the US. My 993 cup is coming in Tuesday and I'm running it next Saturday and Sunday and I need to know what type of gas to put in.
The Porsche motorsports page says 98ROZ. The shell web site says 98 ROZ (or RON in english) = 93 US ((RON+MON)/2).
So, I think that I can run on plain old 93 that I can find at every pump in GA.
I see that most people at the track however run 100 US fuel because they say that pre-ignition would occur... Does anyone have REAL information on this? In other words, I am not prepared to try to save $3 per gallon and blow up a $25K engine... I figure that I will use about 500 gallons a year though so this is a $1500/year question that I would like to have answered.....
TIA
JM
The Porsche motorsports page says 98ROZ. The shell web site says 98 ROZ (or RON in english) = 93 US ((RON+MON)/2).
So, I think that I can run on plain old 93 that I can find at every pump in GA.
I see that most people at the track however run 100 US fuel because they say that pre-ignition would occur... Does anyone have REAL information on this? In other words, I am not prepared to try to save $3 per gallon and blow up a $25K engine... I figure that I will use about 500 gallons a year though so this is a $1500/year question that I would like to have answered.....
TIA
JM
09-03-2001, 01:32 AM
#2
Racer
Join Date: Jul 2001
Location: Torrance ,Ca
Posts: 416
Likes: 0
Received 0 Likes
on
0 Posts
Pump gas is fine for a stock engine normally aspirated. Unless you increase the compression,advance the timing , and / or go wih radical cams you won't need a higher motor octane rating than 92 to avoid detonation. Good luck !