Though I would pass this on. . .
03-29-2006, 09:55 AM
#1
Thought I would pass this on. . . . . .it came up on one of the marine boards that at the end of '07 the highest octane available at gas stations will be 91. This is a federal law that will go into effect. Any state that does not comply with this will loose there federal money. This was pointed out to the board by an engine mfg and that is one reason he is gearing his selection of marine engines to BIG CID and low compression to make good useable HP in the future.
Last edited by Cstraub; 03-29-2006 at 03:28 PM.
03-29-2006, 10:36 AM
#5
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Why is lower octane good for the government? Is it because it burns cleaner? I would think a higher octane would burn cleaner. As I see it, politicians are just one step up from child molesters and this just proves it one more time.
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03-29-2006, 03:33 PM
#12
Here is the post by Ray Brodie of Raylar Engines. They make heads, intakes, and now a 600 CID engine based on the GM 8.1L Vortec platform.
Thought I would add my perspective here. First, we have done a tremendous amout of R&D on big inch marine BBC engines with our new HO725 engine (600 cubic inches) and I can honestly tell you that is you are going to take a 572 cubic incher and produce 850 (real) horsepower at 6000rpms or less you are going to have to run above average non-pump gas compression. Most likely 10.5 to one to 12.5 to one and a big cam that will not be to friendly for long idles and will most likely make peak power around 6200 rpms or more. Some of todays high performance boaters are going to have to get a little more realistic with thier expectations and realize a few things. First, all 91+ octane fuel is mandated to disappear in all states by 2007, yes thats right 2007, less than a year away! so unless you plan to fill your 100 gallon plus tank with race fuel and you rob banks during the week to pay for it you could have a motor that you can't run! There really is no hocus pocus magic in big inch naturally asspirated marine motors. The real horsepower with todays good parts just comes from a combination of cubic inches+compression+ good breathing+camshaft. My expierence shows me that if you want a pump gas friendly, reliable, non-tempermental, non-supercharged,decent idle, fairly long lived big inch marine motor that will make its peak power under 6000 rpms be more realistic and settle for 700HP to 800HP and spend more time and less money enjoying your boating season longer on the same motor!
Just my thoughts from someone who makes a living developing and building motors.
Ray @ Raylar
This is off of www.offshoreonly.com
Thought I would add my perspective here. First, we have done a tremendous amout of R&D on big inch marine BBC engines with our new HO725 engine (600 cubic inches) and I can honestly tell you that is you are going to take a 572 cubic incher and produce 850 (real) horsepower at 6000rpms or less you are going to have to run above average non-pump gas compression. Most likely 10.5 to one to 12.5 to one and a big cam that will not be to friendly for long idles and will most likely make peak power around 6200 rpms or more. Some of todays high performance boaters are going to have to get a little more realistic with thier expectations and realize a few things. First, all 91+ octane fuel is mandated to disappear in all states by 2007, yes thats right 2007, less than a year away! so unless you plan to fill your 100 gallon plus tank with race fuel and you rob banks during the week to pay for it you could have a motor that you can't run! There really is no hocus pocus magic in big inch naturally asspirated marine motors. The real horsepower with todays good parts just comes from a combination of cubic inches+compression+ good breathing+camshaft. My expierence shows me that if you want a pump gas friendly, reliable, non-tempermental, non-supercharged,decent idle, fairly long lived big inch marine motor that will make its peak power under 6000 rpms be more realistic and settle for 700HP to 800HP and spend more time and less money enjoying your boating season longer on the same motor!
Just my thoughts from someone who makes a living developing and building motors.
Ray @ Raylar
This is off of www.offshoreonly.com
03-29-2006, 05:05 PM
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Originally Posted by kenp
I did a search and I don't see any octane resitictions for refineries in 2008.
What's the US Senate Bill or EPA directive or regulation?
What's the US Senate Bill or EPA directive or regulation?
