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View Full Version : what octane to use?


JGMACHINE
04-08-2005, 08:04 PM
Ok guys, I got my boat over the winter and I am going to take it out of storage tomorrow. It has twin 454's 330 HP. What percentage octane do you recommend? The motors are 1990's. Boat is a 1990 IMP 310 Eleganza.
http://img.photobucket.com/albums/v450/jgmachine/b.jpg
MudPumper
04-08-2005, 08:20 PM
If they are stock 454's id just run 91 oct.
77charger
04-08-2005, 08:26 PM
87 if for some odd reason it does ping then 91 but i seriously doubt you have any probs on 87 regular
Dr. Eagle
04-08-2005, 08:28 PM
87 if for some odd reason it does ping then 91 but i seriously doubt you have any probs on 87 regular
Exactly...
No need to pay the big bucks unless you are detonating.
Burnout
06-29-2005, 09:30 AM
Unless you are unlike the typical western NY breed......Be sure you do not have detonation. Listen to you engine and have it tuned regularly. As well, use a decent marina for your gas. I have been to many where the gas is crap.....But if you are taking that big momma I saw from another thread (I give you credit for dating such a big woman, to each their own) you will definately need the higher octane to pull that around.
Beer-30
06-29-2005, 09:40 AM
Yeah, the 330 HP is a low-perf motor, you should be able to run 87 all the time. Put the extra money into more important things like beer.
piper
06-29-2005, 09:43 AM
Yeah, the 330 HP is a low-perf motor, you should be able to run 87 all the time. Put the extra money into more important things like beer.
Yeah now the beer thing is important, don't be buying no cheap beer.
cola
06-29-2005, 09:45 AM
Unless you are unlike the typical western NY breed......Be sure you do not have detonation. Listen to you engine and have it tuned regularly. As well, use a decent marina for your gas. I have been to many where the gas is crap.....But if you are taking that big momma I saw from another thread (I give you credit for dating such a big woman, to each their own) you will definately need the higher octane to pull that around.
She was hot. :sqeyes:
HCS
06-29-2005, 10:04 AM
All the way to the end pump!
Wonderboy
06-29-2005, 11:43 AM
She was hot. :sqeyes:
This one?
http://www2.***boat.com/image_center/data/500/26442406belly_drop_0001.jpg
Nord
06-29-2005, 11:45 AM
What do you run in a stock 502 Mag?????
I run 89 :confused: :confused: