vito's big bore cylinder kit

[FASTOYS]

Just got the results, 34 trq/65 hp 421 Vito 4mm motor w/CPI pipes. Im sorry but im out. Our play port 350s make more than that anytime!! Im sure i can get more power out of them by porting them but why spend the money on them when a Play port or the Cub will do more out of the box?

[jbooker82]

im not looking for a drag port either. my cylinders now are ported by r&b racing out of mich. im working on building my other bike up now, so thats why im looking into big bore kits, ect. a couple guys say that the vito's big bore is a good all around engine kit. great for the dunes with alot of good usable power. and like i said above, with a little port clean up you can see even better results out of it. so thats what im trying to ask if the big bore kit is a notch up from a good port job with a little work? just trying to get some more opinions before i jump on buying it.

 

Yea you can spend the 500 for the cylinders then pay some one another 300 for port work. Or you could buy a 4 mill crank and have your stock cylinders ported and have a way better engine.

 

I would do a ported 4 mill over a pair of ported vito's cylinders.

[- DUNNY -]

thanks guys for all the input. i was just hoping to get some more power without having to split the cases and go 4 mill in this bike. i really dont have the time for that. and figure it will be a decent amount to have it done.

[FASTOYS]

You dont have to have a 4mm to make power!!! At least we dont.

[blowit]

Just got the results, 34 trq/65 hp 421 Vito 4mm motor w/CPI pipes. Im sorry but im out. Our play port 350s make more than that anytime!! Im sure i can get more power out of them by porting them but why spend the money on them when a Play port or the Cub will do more out of the box?

 

 

 

I think your dyno is broke Jeff..

 

 

Did you get a chance to inspect the port layout and timings? I cannot imagine them stepping too far off the already proven path but who knows. I might suspect tire slip with those dyno numbers but usually torque will go up somewhere. I would be straight pissed with those numbers on a 421... Hell, our 421 stock cylinder stuff will spank that hard!

 

huh.

[FASTOYS]

Not our dyno. It was at LS in Waynoka and it reads very close. Yeah i hear ya.

[BANSHEE HP]

stock carbs into dragported cylinder into cpi pipe that just dont sound right prolly why the number dont look good.

[EvilBanshee]

Just got the results, 34 trq/65 hp 421 Vito 4mm motor w/CPI pipes. Im sorry but im out. Our play port 350s make more than that anytime!! Im sure i can get more power out of them by porting them but why spend the money on them when a Play port or the Cub will do more out of the box?

 

You cant make horse power out of a 421 with stock 28mm carbs bud. Let the thing breath and you will see big numbers.

[mopar1rules]

You cant make horse power out of a 421 with stock 28mm carbs bud. Let the thing breath and you will see big numbers.

 

just to clarify, stock carbs aren't 28mm, they are 26mm.

[SLORYDER]

I bet your rings would last a lot longer on the vitos cylinder than a 65hp stock cylinder

I would also like to know what the port timings are.

[EvilBanshee]

just to clarify, stock carbs aren't 28mm, they are 26mm.

 

Oh, well thats even!! those big engines cant breath by sucking through a straw!! I have the big bore 404 kit, and the 421 kit on order. These engines wake up huge when you throw a propper size carb on them. Iv raced many tweeked out 350's. I destroy them from 2nd gear on, i pull away like nothing.