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Going from 20% to 40%?????????????

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Going from 20% to 40%?????????????

Old 04-08-2005, 08:09 PM
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ejp67
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Default Going from 20% to 40%?????????????

I was wondering if going to 40% nitro would give me a lot more power from 20%??? How much shorter engine life will I get??? Would it be worth the change. I wouldn't be afraid to try some 40 but I don't have a LHS so I have to order my fuel. 4 gallons at a time[:'(] So any help would be great.
Old 04-08-2005, 09:08 PM
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eas___1990
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Default RE: Going from 20% to 40%?????????????

well i dont any thing about it,but i heard that some guy went into to high %age and he cracked his crank case or engine case or w/e it's called.
Old 04-08-2005, 10:04 PM
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Default RE: Going from 20% to 40%?????????????

In what engine, for what porpose - car, plane, boat, etc.?

Typically you can go up 10% from what the original manufacturer specifies for that particular motor without changing anything on the motor. For example from 20% to 30% would be OK. Beyond that you run into trouble.

To go to 40% you would likely have to add a head shim to increase the squish area and decrease compression. This will allow you to run the higher nitro without detonation or over heating. This will also change you needle settings and pipe length. You would need to go richer on the needle, and the higher nitro would make the effective length of your tuned pipe shorter so you would have to lengthen it a little.

Best move is probably to go with 30%. You shoudn't have to change anything and you will notice a difference in performance. Again this depends on the motor and application it's being used in.
Old 04-08-2005, 10:04 PM
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Default RE: Going from 20% to 40%?????????????

I am going to get some 30% this time around
Old 04-08-2005, 11:56 PM
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Default RE: Going from 20% to 40%?????????????

How is this brand of fuel???
http://www2.towerhobbies.com/cgi-bin...?&I=LXGHB0&P=K
http://www.morganfuel.com/cp_main.htm
Old 04-09-2005, 03:43 PM
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Default RE: Going from 20% to 40%?????????????

gee's 76 bucks thats 3/4's of what my engine cost[X(]
Old 04-09-2005, 07:26 PM
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Default RE: Going from 20% to 40%?????????????

Yep. But thats for 4 gallons.
Old 04-09-2005, 07:44 PM
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Default RE: Going from 20% to 40%?????????????

very true that aught to keep you suplied for a good long time...hopefully(lol)
Old 04-09-2005, 07:47 PM
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Default RE: Going from 20% to 40%?????????????

Yeah, With three boats it will be a gallon a day.
Old 04-09-2005, 08:09 PM
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eas___1990
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Default RE: Going from 20% to 40%?????????????

how far away is the nearest hobby shop from where you live?
Old 04-09-2005, 08:23 PM
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Default RE: Going from 20% to 40%?????????????

3.5 hrs.[:'(]
Old 04-09-2005, 08:36 PM
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eas___1990
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Default RE: Going from 20% to 40%?????????????

holly shniekes thats a long way mine is only like 5 minutes away now cuase we got one in town about 2 years ago,other wiase i would have had to go to columbia,mo which is like an hour drive there(still nothing compared to 3.5 hours)
Old 04-10-2005, 08:36 AM
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Default RE: Going from 20% to 40%?????????????

I would not recommend COOL Power fuel for boats. Believe CP was made for flyers. If you take a good look at the Morgan site, you'll see that it lists only Aero, Heli or 4 stroke. Ok, they have "specialty" fuels, but no lubricant.

If you want good fuel, check out Wildcat Fuel

http://wildcatfuels.com/fuel_promix.htm

I run their 65% in all my boats, including the 13cc K&B OB.

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