Ofna Hyper .21 8 Port: Porting Some More

Well i just did some more porting and cleaning out the piston and stuff. After i just took the hole engine out and cleaned every bit and polished the crank but after putting the rear plate back it cracked :( good thing i have a friend that has a spare and I can trade some stuff for it.

Category:

Autos & Vehicles

Tags:

• ofna
• hyper
• .21
• port
• porting
• sleeve
• piston
• rc
• nitro
• hpi
• savage
• 25
• engine
• polish

[tman1335]

savages normally do wheelies any ways..????..easy way to make a stock rc do a wheelie...stiff rear shocks low gearing spur gear...and u will be the wheelie king...

[30GB]

@tman1335 well when i got my savage it never came with a engine so when i got this, it barley did any wheelies but i have gotten a s-25 engine and thought it had more power but it didnt. After i got the right pipe for the .21 it has so much power now more than a s-25 engine with a tuned pipe

[5scaleracer]

Buy a new piston and sleeve. Wants you damage it is never the same. Or you can go ahead and change your brain!!!!!!

[30GB]

my ass it needs a new one, i been running it almost half gallon on hi rpms and its running fine

[adb140275]

you should get into that crank and gut it.

[30GB]

its all ready prepped stock so i dont need to thats why it was so powerful already

[DannysCam]

wow that looks like a bullet shell hehehe. keep up the good work man

[supersport3381]

u sound like a fag from cali

[Miimiikinzz]

@Crystaaaaaaall the motor that came with the truck is a s-25, this motor i bought was from another guy 4 years ago and i still have it. also this motor puts out more power and top end than a .25 motor because of its ports but i got a o.s something pipe and it kicks ass and its worth $100 alone

[Crystaaaaaaall]

@30GB you got the savage from me, it came with that motor , and the hyper pipe aswell, with the ofna 8 port .21 its shit it looks like its fast but its just off the line torque, the dynamite 053 mr or the jp3 is a better choice, i run the 053mr and my hyper 7 is significantly faster, yeah this is the guy you traded the xray for, not bashing you but the 053mr or the jp3 is waaay better choice, or if you wanna get outrageous, go twin tipped and she`ll scream like a lil bitch

[oakleymac1]

I would'nt polish the angled part or any part that comes in contact with fuel it usually forms droplets which is not really what you want. You want as fine a mist or in other words to atomise the fuel as much as possible. This makes the engine more efficient meaning you will get more power from the charge in the cylinder for the amount of fuel and air that went in against the fuel and air that formed droplets. Normaly 80 grit wet and dry is used to rough intake walls on ports to prevent it.

[maxbify]

@fightboy1000 hmm? i dont get it, but these small engines are 2 strokes and works the same as all other 2 stokes in the cylinder, the intake is a little difrent from engine to engine, you obviosly dont know a shit about this so stfu?.. and yes you can get 25 hp from a 70cc and alot more if u put this nitro thing youre talking about in it