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Author Topic:   nitromethane or nitropropane additives?
mini18r
Member
posted July 05, 2004 05:36 PM
Getting real close to the front and think this is what the badguys have that i dont.I run a 4cyl and want a little more hp here in the northeast.Can some of you give some advice on what product is better and what ratio you mix at with gas.


Ego Racing
Member
posted July 06, 2004 08:40 PM
Nitro methane is explosive and hard to ignite, That is why you can see it blowing out of the headers on top fuel cars, as for the other you can smell if someone is running it.


eenfield
Member
posted July 06, 2004 09:21 PM
Wrong. The reason why you see it coming out of the pipes, is because of the enormous volume of fuel being pushed through the engine is not being completely burned.


Kromulous
Member
posted July 07, 2004 10:45 AM
Nitro Methane makes some serious power, but requires a serious engine to handle it. Also some set up work, particularly the carb.

A Normal V8 will explode with Nitro going thru it, or at least the crank would drop out the bottom of it. A oval track engine would have to be pretty high end to handle mixtures in the 20% to 30% range.

It makes alot of heat, and burns super slow. Non forged pistons i would think would be not an option.

I've thought about trying some, maybe a 10% mix but afraid of burning the pistons down.

Ego Racing
Member
posted July 07, 2004 12:17 PM
When in the staging lanes Top fuel cars are running off of one fuel pump. So there is not the fuel load as when running down the track, the fuel system is bypassing about 85% of the total fuel charge. The reason they run two plugs per cylinder is so if one goes out the other helps catch the charge. Under normal compression nitro is VERY hard to ignite, under high compression it can explode. When a Top Fuel car is running the compression is around 9:1 that is why they Start the car on PUMP gas (that is what is in the squirt bottle they use into the front of the bird catcher) because the car will not fire the nitro mix without the added compression of the blower. With the blower at speed the compression is rased up over the 13-14 : 1 numbers. At this if the plug dosen't ignite the fuel it will blow the head off and there is a huge fire ball. (We have all seen this on TV) When you see a cylinder go "DEAD" the plugs died. Is it was so explosive at normal pressure it would ignite when it hit the flames from the other pipes, but it dosen't is comes out wet.


mini18r
Member
posted July 07, 2004 03:54 PM
Been reading up on the stuff the last few days.20 to 30% is way to much 10%would be maximum and if it detonates at 10%it will hurt parts.Anyway this stuffs not for me,cant afford to hurt parts.


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