c12 in 9:1 CR SBC
#3
James is exactly right..you can over fuel a motor...meaning that too much octane can acutally slow one down...octane is used to gaurd against detonation purposes only..
Brian
Brian
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Bjuice..
"I'M YOUR HUCKLEBERRY ! "
Bjuice..
"I'M YOUR HUCKLEBERRY ! "
#4
Senior Member
SENIOR BUILDER
Thread Starter
Join Date: Dec 2005
Posts: 117
thanks for the responses guys. that's exactly what i was thinking. i have never found giving an engine more octane than it requires to be useful. the reason i asked is i have a friend that races circle track and he insists he needs c12. i tell him he is wasting his time and money. oh well.......
#5
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DYNO TECH
Join Date: Feb 2004
Location: Leonard, Texas
Posts: 414
One of the most common misconceptions about octane I come across, is people think the higher the octane the more flamable or powerful the fuel is. In reality, the higher octane actually raises the flash point, meaning higher temps are required to ignite the fuel. This is why it makes more power because it allows the engine to squeeze it more before igniting it causing a bigger bang. A low compression engine may have difficulty generating enough cylinder temp (which cylinder pressure is partialy responsible for), to completely burn the fuel, consequently reducing engine efficency.
So what they said about no benefits to it in a low compression engine!
So what they said about no benefits to it in a low compression engine!
#6
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Join Date: Feb 2006
Location: VA Hospital, Dallas, Tx (214 302 1924) cell-972-464-7400
Posts: 540
A dyno should show a power loss.
If this is a street engine it should work fine on 87 octane pump gas. Maybe 89 at the most. If itr won't it is maybe a non-quench engine and will require the extra RON/MON of the 92-93 octane.
Ed
If this is a street engine it should work fine on 87 octane pump gas. Maybe 89 at the most. If itr won't it is maybe a non-quench engine and will require the extra RON/MON of the 92-93 octane.
Ed