9hp Honda ohv gx270

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Porkchop1990

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In the process of building a go kart, and it's kinda my first time ever working on one, thank god for youtube haha..
anyway I'm trying to make my kart at it's max HP and I kinda need help. the title is the exact engine im using. I changed the air box to a intake, and I added a straight pipe on. I'm not sure what else to do. Nor do i know much about the engine it self. do i change the spark plugs? or anything at all.
Hope someone can help meeee :surrender:
 
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carter

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Porkchop1990 said:
In the process of building a go kart, and it's kinda my first time ever working on one, thank god for youtube haha..
anyway I'm trying to make my kart at it's max HP and I kinda need help. the title is the exact engine im using. I changed the air box to a intake, and I added a straight pipe on. I'm not sure what else to do. Nor do i know much about the engine it self. do i change the spark plugs? or anything at all.
Hope someone can help meeee :surrender:
Click to expand...

REmember there is such a thing as too big of a pipe, if you go too big on your pipe, you'll lose what is known as the scavanging effect and that will actually have a negative effect on performance.
 
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Porkchop1990

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well i havent hooked it up yet, i believe i ordered an 18" pipe..

the intake also isnt hooked up yet, both pieces were ordered off BMI
 

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Porkchop1990

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Alright ill do it as soon as i can, the screw holes are only off by a little i was thinking of maybe attaching a plate and maybe working off that idk
 
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alright you can just increase the size of the holes by making them into slots

EDIT: this is what i mean. assuming this is your problem
 

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domtrain

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if it came with only a 2.5hp motor you may want to make sure that the mounting plate isnt a cheap little 1/16 in. plate. thats what one of my karts had and it just bent and broke under all the extra power when i upgraded motors. i just welded up a 1/4 in. plate only took about an hour and worth it. if you dont upgrade plates your chain will start loosening due to a bending mounting plate and it may fall off at a bad time:thumbsup:
 
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I could be wrong but, I'm pretty sure the footprint is both longer & wider...

domtrain said:
if it came with only a 2.5hp motor you may want to make sure that the mounting plate isnt a cheap little 1/16 in. plate. thats what one of my karts had and it just bent and broke under all the extra power when i upgraded motors. i just welded up a 1/4 in. plate only took about an hour and worth it. if you dont upgrade plates your chain will start loosening due to a bending mounting plate and it may fall off at a bad time:thumbsup:
Click to expand...

Good point :thumbsup:

Oh, BTW: Porkchop, NO SWEARING!
 
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