03 575 sci fuel requirements ?
10-24-2005 | 08:45 AM
#2
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Joined: Nov 2002
Posts: 2,621
Likes: 1
From: Nashvegas, TN
Re: 03 575 sci fuel requirements ?
Sonic:
Mine is modified with 7PSI intercooled boost, so I never run less than 93. I have run in on an 89/93 mix, when/where on the water 93 wasn't available. I just stay out of the boost range.
Regarding your motor, even if it's stock, I wouldn't. I recall (don't have mine handy) the factory Merc manual recommends 91/92 octane. Pump gas does vary in quality. I would rather be slightly high on octane on a supercharged motor, than low, anytime.
Regards,
Steve
Mine is modified with 7PSI intercooled boost, so I never run less than 93. I have run in on an 89/93 mix, when/where on the water 93 wasn't available. I just stay out of the boost range.
Regarding your motor, even if it's stock, I wouldn't. I recall (don't have mine handy) the factory Merc manual recommends 91/92 octane. Pump gas does vary in quality. I would rather be slightly high on octane on a supercharged motor, than low, anytime.
Regards,
Steve
10-24-2005 | 04:30 PM
#3
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Joined: Dec 2000
Posts: 1,333
Likes: 1
From: Puerto Vallarta Mx, Lake tahoe Ca,
Re: 03 575 sci fuel requirements ?
same here,,
have 700 hp 575's and i run best ocatne can get
never under 91 unless have to get home and its crisis and i have octane boost with me to mix in if in a pinch like that..
only happened once.. and i didnt lay into it as u cant hear if starts pinging..
Jonas
have 700 hp 575's and i run best ocatne can get
never under 91 unless have to get home and its crisis and i have octane boost with me to mix in if in a pinch like that..
only happened once.. and i didnt lay into it as u cant hear if starts pinging..
Jonas
Originally Posted by Steve Zuckerman
Sonic:
Mine is modified with 7PSI intercooled boost, so I never run less than 93. I have run in on an 89/93 mix, when/where on the water 93 wasn't available. I just stay out of the boost range.
Regarding your motor, even if it's stock, I wouldn't. I recall (don't have mine handy) the factory Merc manual recommends 91/92 octane. Pump gas does vary in quality. I would rather be slightly high on octane on a supercharged motor, than low, anytime.
Regards,
Steve
Mine is modified with 7PSI intercooled boost, so I never run less than 93. I have run in on an 89/93 mix, when/where on the water 93 wasn't available. I just stay out of the boost range.
Regarding your motor, even if it's stock, I wouldn't. I recall (don't have mine handy) the factory Merc manual recommends 91/92 octane. Pump gas does vary in quality. I would rather be slightly high on octane on a supercharged motor, than low, anytime.
Regards,
Steve
10-25-2005 | 02:22 PM
#4
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Joined: Dec 2001
Posts: 3,904
Likes: 1
From: Iowa - Missouri
Re: 03 575 sci fuel requirements ?
Originally Posted by 26sonic
what fuel requirements do the 575 sci's need ? can they be run on 89 octane ?
The second is yes, at your own peril.
