Thread: NITRO Vs. GAS
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Old Aug 23, 2002, 05:59 PM
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Dr John
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Lake Placid, Florida
Joined Dec 2001
2,712 Posts
Yes gas will have more torque mostly because it is a larger displacment engine. Twisting a larger diameter high pitch prop will introduce it's own problem, prop walk. Assuming you are using a surface drive as opposed to a subsurface drive ( most really fast boats do ) as the blade comes into contact with the water it will not only push the boat forward but also pull the transom to the left. I have seen boats with such a severe case of prop walk that it was impossible to keep them going straight.
Twmaster also makes a good point. A 42" hull with a nitro 90 and a 45" hull with a QD are both seriously over powered and will require a competent driver to keep them prop side down even in calm water. We have done several custom QD installations for customers but they have all gone into larger hulls. The Magnum is 57" and the Manta Ray is 55" Click the www button below to see these boats.
If you still think you need more power by converting to alky we can help. All the rubber parts inside the carb need to be replaced with parts that won't fall apart when subjected to alcohol and a serious rejetting will be needed as well as the proper fuel mix.
Won't this void your gas vs nitro bet ?
Hope this helps.
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