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Old 06-28-2006, 12:07 PM   #556
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Quote:
Originally Posted by stefan
There were rumors when Jim Hottinger took over the US distribution for Top engines that he had some influence on the layout (timing) of the Top engines. Mine even had a silicone bed in the crank, which I never saw on a stock NR based engine before.
I had a Jim Hottinger moded TSR5 and it was ballistic!
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Old 06-28-2006, 12:15 PM   #557
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are the motors still backordered?
thx
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Old 06-28-2006, 03:41 PM   #558
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Quote:
Originally Posted by mtveten
Josh,

What are your thoughts on the different nitro percentages?

Currently I am running primarily on a 150x80ft track using 30% fuel. I get better miliage than all others and have excelent power.

If I were to switch to 20% what would I be giving up? what would I gain? How would the power band change assuming I had the engine tuned as good as it is now?

Does a lower nitro mix make the motor easier to tune?

Thanks,
Mark
Mark, on a smallish track like that, There is really no point in running 30%. You hsouldn't have any problem with running 20%.
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Old 06-28-2006, 04:01 PM   #559
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Quote:
Originally Posted by GrandeGixxer
Mark, on a smallish track like that, There is really no point in running 30%. You hsouldn't have any problem with running 20%.
I always understood that it is the Nitro that cools the motor which is why we are restricted to 16% in the Uk.
So on a small tight track where you cannot get the speed to cool the motor would it not be best to run a higher Nitro content for cooling purposes, after all you can't use the revs the motor gives.
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Old 06-28-2006, 04:17 PM   #560
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Quote:
Originally Posted by NiMo
I always understood that it is the Nitro that cools the motor which is why we are restricted to 16% in the Uk.
So on a small tight track where you cannot get the speed to cool the motor would it not be best to run a higher Nitro content for cooling purposes, after all you can't use the revs the motor gives.
NiMo, higher nitro content does not cool the engine, in fact it creates more heat. Basically, more nitro = more oxidiser to the methanol which in turn creates higher combustion pressures which create more heat.

On the other hand, higher oil content will cause cooler running, because the oil tends to help with heat transfer and expulsion, so the more oil the cooler the engine will run (to a point of course, too much oil will cause the mixture to be manditorially leaner to run properly, thus bringing the heat back)

BK
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Old 06-28-2006, 05:17 PM   #561
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Seeing as how my tracks are abouit 190-200ft x 105 then definately 30 is a must.
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Old 06-28-2006, 06:58 PM   #562
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Quote:
Originally Posted by HarKonnenD
Seeing as how my tracks are abouit 190-200ft x 105 then definately 30 is a must.
I run 30%. I do however know a few very fast guys that run 20% Ira Shultz swears by it. He is fast. I also know some guys that run 40% and aren't very fast at all. I won't mention any names here.
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Old 06-28-2006, 07:17 PM   #563
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Pretty good. I noticed the 30% worked great for the engine up till a point. Though I like how the engine run hot and I have plenty power. Regardless my tracks arent the size of say Toledo or so.
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Old 06-29-2006, 01:54 AM   #564
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There is some video action from the Aldershot track over at 3hobby.net (see link below)
Go to the site, click on downloads (left side) and then on AMCC, then select your video (plenty there)
(You may need to log in to the site to get access)
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Old 06-29-2006, 06:07 AM   #565
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Quote:
Originally Posted by mxwrench
NiMo, higher nitro content does not cool the engine, in fact it creates more heat. Basically, more nitro = more oxidiser to the methanol which in turn creates higher combustion pressures which create more heat.

On the other hand, higher oil content will cause cooler running, because the oil tends to help with heat transfer and expulsion, so the more oil the cooler the engine will run (to a point of course, too much oil will cause the mixture to be manditorially leaner to run properly, thus bringing the heat back)

BK
Ive always thought the same (more heat, due to more power) , but I heard the same from a few people that 30% will run the motor cooler, which does kinda make sense. Thats why it seems to me a lot of the large monster class and buggies run 30% since they need more cooling due to the large mass they must propel and the fact that they arent always running a free flowing open track. Less cooling. But im not a fuel expert.

Another reason why I know people play with nitro percentages is to adjust fuel consumption. If your getting great fuel mileage might as well go up some to use it the excess fuel and put the motor to its best use for the time period on the track.
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Old 06-29-2006, 05:39 PM   #566
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Default Wasp Rev

Hey guys will running one of my Rev 12,s, of which i hve 3 of them i will be running at SuperiorHobbies in Orlando in will be in my new G4s an i will be running 40% nitro
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Old 06-29-2006, 06:01 PM   #567
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Theyll have to put some extra support in those walls. That parkinglot track wont know what hit it...lol.
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Old 06-29-2006, 07:00 PM   #568
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Default Hey A-I

Whats man Bobby Watson yeah i know, tested the 40% in the Wasp ,man it just so dam much horsepower, it is insanly fast . Im running the Novarossi Fatpipe #2630 with short cronical header temped at 198 degress.gearing 18/51 23/46.
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Old 06-29-2006, 07:24 PM   #569
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Quote:
Originally Posted by impalabob64
with short cronical header
I think you have been smoking too much cronic out of your pipe already.
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Old 06-29-2006, 07:32 PM   #570
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Default Oops

sorry man, didnt mean to say that, just short header
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