Mod question?

[geebt48cc]

Well, I know that it's not possible to guessl a HP setting of a modified 66cc, but very curious? Skyhawk slant 2010 GT5 66cc is said to be 2.75hp. Ok, after milled head flat (w/o head gasket),ported exhaust/intake , everything, 8mm thick copper plug wire,NGK B6, with 7" intake, speed carb,SBP air filter/expansion chamber, 25:1 synthetic/castor, so wonder what HP would now could be? Curious again....................

Thanks all.................

Glen

 

[motorpsycho]

2.80 h.p.???

 

[geebt48cc]

Thanks for ideas Moto, but one would think with that with 132 pounds of compression now, that it would be at least over 3hp?................I know that the only way you can really tell is put it on a dyno?????????????????? Wonder just how high you can get one of these little engines up to in hp, to where they still have alittle life left in them? There's a racing expansion chamber that JNmotors has now that says by bolting on stock motor will add 3hp?

 

[max350]

Thanks for ideas Moto, but one would think with that with 132 pounds of compression now, that it would be at least over 3hp?................I know that the only way you can really tell is put it on a dyno?????????????????? Wonder just how high you can get one of these little engines up to in hp, to where they still have alittle life left in them? There's a racing expansion chamber that JNmotors has now that says by bolting on stock motor will add 3hp?

Not a chance --- 3hp just put on an expansion chamber

 

[HeadSmess]

possible with the proper design, on a decent engine...

a ht is not a decent engine...do i start swearing in spanish again? you cannot polish . you can deodorize it slightly and make it slightly less offensive, but its still

a stock standard HT is simply not ported to be able to gain 3hp extra. no pipe in the world will get more air through the intake as it comes, stock.

on a kx50, id believe it. 3hp is easy. on a ht50...no. not without using the dremel first.

at which point the piece of can go like its hit the fan!

 

[geebt48cc]

I get your point HS,

Ok, let me ask this???????? What are they doing internally to get these HT's to grab right at 9+ hp? Sure, high compression,expansion,reed,port work.................but 9+ hp Come on now?

 

[Deleted member 12676]

9 hp
stuff crank
enlarge inner diameter of intake track and install large carburetor
make boost port(s)
balance engine (since vibration robs power)
port engine
increase compression
install motorcycle piston
expansion chamber
good CDI with Honda racing coil

unfortunately the porting and pipe have to be designed to shift all the power to top rpm so that it runs like a dog till it comes "on the pipe". that kind of powerband is not effective unless the engine has a close ratio gearbox.

 

[geebt48cc]

Yeah, I see........ Naaa, Jag, you know as well as anyone, that what I would be after is the torque. I could see that most everything you listed would be fantastic if I was away from all of these hills. Other than 3 intake for reed, boost ports????

 

[Deleted member 12676]

even if not porting for high rpm power, boost ports can add power as long as they are done right. Too big and you lose power.

 

[geebt48cc]

So, where do I look on your listings of performance mods? Once again, I would really like lows to mids...............