Nitro carb build

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C

CR500AF

New Member
May 20, 2012
78
4
0
Ontarieo
Il building a nitro carb out of a stock ht carb will post lots of pics

the mix will be a 35% nitro 55%methol and 15% castor

the fual system mods will include: porting the petcock, modding the jet for flow 2.7times more fual or someware around 4.5parts air to 1 part fual

pros:instant 80-90% increase in power,no pinging or fourstorking and cooler and more lubercated running

cons: COST,little riding range,gas stations don't sell it

il try to get done on this tread in hoply a week or so.
 
maniac57

maniac57

Old, Fat, and still faster than you
Oct 8, 2011
4,484
22
0
memphis Tn
CR500AF said:
Il building a nitro carb out of a stock ht carb will post lots of pics

the mix will be a 35% nitro 55%methol and 15% castor

the fual system mods will include: porting the petcock, modding the jet for flow 2.7times more fual or someware around 4.5parts air to 1 part fual

pros:instant 80-90% increase in power,no pinging or fourstorking and cooler and more lubercated running

cons: COST,little riding range,gas stations don't sell it

il try to get done on this tread in hoply a week or so.
Click to expand...
Insanity! Keep us posted...dnut
 
B

bowljoman

New Member
Aug 7, 2010
370
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Wa
LOOLOLOL Smells good.....


It should run like the devil, with blue flames shooting out the exhaust until the piston melts through the crown.

It would be awesome if you could get pistons forged hard enough to last more than 10 miles.
 
maniac57

maniac57

Old, Fat, and still faster than you
Oct 8, 2011
4,484
22
0
memphis Tn
Treat it like a low-budget blower motor...low compression and loose rings. I'd hate to be riding it when it blows though...KABOOM!
 
scotto-

scotto-

Custom 4-Stroke Bike Builder
Jun 3, 2010
6,505
24
38
Ridin' inSane Diego, CA.
I hope you know I was joking about running straight RC Nitro Methane fuel in my 212cc 4-stroke......it would probably explode shortly after start up.

On a serious note though, it is added to a new race fuel I just mixed up today......4 gallons worth and it cost nearly $30. It should work really well with the higher compression I'm running now ;) I'll know tomorrow at the race for sure.....

.wee.
 
maniac57

maniac57

Old, Fat, and still faster than you
Oct 8, 2011
4,484
22
0
memphis Tn
scotto- said:
I hope you know I was joking about running straight RC Nitro Methane fuel in my 212cc 4-stroke......it would probably explode shortly after start up.

On a serious note though, it is added to a new race fuel I just mixed up today......4 gallons worth and it cost nearly $30. It should work really well with the higher compression I'm running now ;) I'll know tomorrow at the race for sure.....

.wee.
Click to expand...
Higher compression isn't the main problem running nitro, It's getting enough fuel and spark to unleash the true potential..The truly awesome explosions you see in Top Fuel racing usually result from losing spark in a cylinder, and the amount of fuel not being burned actually fills the cylinder and hydraulically locks it. Since you can't compress fluids...BANG!
 
scotto-

scotto-

Custom 4-Stroke Bike Builder
Jun 3, 2010
6,505
24
38
Ridin' inSane Diego, CA.
maniac57 said:
Higher compression isn't the main problem running nitro, It's getting enough fuel and spark to unleash the true potential..The truly awesome explosions you see in Top Fuel racing usually result from losing spark in a cylinder, and the amount of fuel not being burned actually fills the cylinder and hydraulically locks it. Since you can't compress fluids...BANG!
Click to expand...
Yeah, I know........I just added approx. 5ozs. of the nitro to the 4 gallons of 108 octane AvGas/VP race gas mix for a little extra kick. I must say that it worked very well......it was one of the fastest gas bikes on the track today.



.wee.
 
Last edited:
scotto-

scotto-

Custom 4-Stroke Bike Builder
Jun 3, 2010
6,505
24
38
Ridin' inSane Diego, CA.
It's been 3 weeks now.........any progress?

dnut

CR500AF said:
Il building a nitro carb out of a stock ht carb will post lots of pics

the mix will be a 35% nitro 55%methol and 15% castor

the fual system mods will include: porting the petcock, modding the jet for flow 2.7times more fual or someware around 4.5parts air to 1 part fual

pros:instant 80-90% increase in power,no pinging or fourstorking and cooler and more lubercated running

cons: COST,little riding range,gas stations don't sell it

il try to get done on this tread in hoply a week or so.
Click to expand...
 
maniac57

maniac57

Old, Fat, and still faster than you
Oct 8, 2011
4,484
22
0
memphis Tn
scotto- said:
Yeah, I know........I just added approx. 5ozs. of the nitro to the 4 gallons of 108 octane AvGas/VP race gas mix for a little extra kick. I must say that it worked very well......it was one of the fastest gas bikes on the track today.



.wee.
Click to expand...
Watch the plug carefully for signs of detonation and overheating. It doesn't take long running nitro to destroy parts...
 
C

CR500AF

New Member
May 20, 2012
78
4
0
Ontarieo
I need the carb at the moment,

the only draw back will be fual costs,

the engine will run way cooler and castor is a better then any 2 smoke oil could ever be.

i have took the jets out of big chainsaw carbs and ran nitro in my old 35cc scooter and i could even turn it to rich on the high speed
 
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