Briggs 8hp flathead

[I like karts]

If I put my mikuni 24mm slide carb on it, and smooth the ports a bit, and add a straight pipe, you think I'll be getting about 10 hp?

 

[freakboy]

then remove gov then stiffer valve springs then i guess. it might be somewhere around there.

 

[I like karts]

How would I get hop up valve springs for an 8hp though? I think I'll just have to improvise I guess, huh..

Also, I think I'll post a video of it once I get all this stuff done to it. It should be pretty nice

 

[freakboy]

then dont bother with the springs lol

 

[slideways]

It would depend on what you wanted out of it i guess. Those big bore flatty's are torque monsters. The updraft carbs are great for low rpms. I'd deck the head in addition to your porting and smooth out the carb elbows (dont open them up too far).

 

[I like karts]

Well, I kinda have my heart set on using the mikuni, because it's REALLY nice, and I've had it sitting around for a while. I feel like it needs to be put to good use. Also, I plan on using this MAYBE up to 5000 rpm MAX, as I'll be sliding around a bunch on my little kart, and I plan on using direct drive. Kind of like an old school thing (because I need to be really cheap )

Also, would a 5hp flywheel fit on the 8hp?

 

[freakboy]

DONT PUT SMALLER FLYWHEELS ON BIGGER ENGINES JUST DONT PLAY WITH THEY FLYWHEEL AT ALL keep it stock or get a billet flywheel.

 

[I like karts]

I'd think it would be fine... just gotta move the coil a little bit. And they don't make a billet flywheel for that big of an engine

 

[freakboy]

then just keep the stock flywheel.

 

[I like karts]

Okay.

 

[freakboy]

i think that since its smaller it will have more centrifical force thus causin it to spinn up faster and more likely to break something cause its lighter.

 

[jr dragster T]

They use 3 HP flywheels on 5 HP's in the world of racing because they are smaller and lighter. Flywheel explosions have been decreased greatly ever since.

 

[I like karts]

So you're saying it'd be okay to use the 5hp wheel on the 8hp?

 

[I like karts]

And another reason why I want to do that is that the 8hp flywheel is really rusty, which bothers me. The 5hp flywheel is relatively clean.

 

[freakboy]

then just get a wire brush and clean it then spray the thing to prevent rust.

 

[jr dragster T]

All steel and cast iron flywheels are going to get a bit of surface rust. Its nothing to worry about.

 

[I like karts]

Ah, it seems that one of the aluminum fins has broken off. This kinda bothers me..

 

[oscaryu1]

Depends how it broke off. Hammered off? Dropped?

And you have to check the tapers, if may or may not fit.

And to my knowledge, they DID make 8HP Billet flywheels. Mainly due to the majority of lawnmower racers who had 8HP's.

 

[crazycart]

http://cgi.ebay.com/Briggs-and-Stra...s?hash=item4a8adf5111&_trksid=p3286.m20.l1116

Don't know if it will work on a whorazontal.

 

[I like karts]

whorazontal.

And thanks. Even though I don't think I can afford one.