300ex how much hp ?????

[bracey]

does anyone know what hp numbers one should have the high and low at the wheels of a 300cc 300ex like what good thanks

[yamaharaptor350]

i think they have about 14 peak hp stock

[bracey]

what is a good number for one that has been done up to race mx like carb pipe headwork but only the punched to 298cc

[hardkoratvmxr]

i heard stock they were like 16-18 peak hp

[fasterblaster09]

Originally posted by hardkoratvmxr
i heard stock they were like 16-18 peak hp

Yehh me too,im pretty sure its more than 14,I believe thats about the 250ex..but correct me if im wrong.

[yamaharaptor350]

u guys are prolly right, thats just what ive heard

[Cody_300ex]

Originally posted by bracey
what is a good number for one that has been done up to race mx like carb pipe headwork but only the punched to 298cc

Built by a big name engine builder? Anywhere from 29-33HP.

[bracey]

surely you dont mean rwhp 28 to 33 is alot out of a 300ex are you sure and if so who is doing that kind of work got any numbers and do you race in the bass indoor races in kentucky thanks

[bwamos]

I get 30-32 dyno'd out of the rear wheels on my 11:1 330ex.

If a 298 is running 13:1 it should be getting about the same power than I am. So his estimate isn't that far off. These are both FULLY built motors. Port, polish, cam, CDI, valves, springs, HC piston, carb, pipe, filter, etc...

Most of the big guys that have been around a while can get that power out of a 250x/300ex. Sparks, FST, DASA, etc..

Remember in the 1990's, the warrior and 300ex/250x were your 4-stroke choices for racing. ;) There's been a LOT of R&D on these 2 quads.

IMHO, Sparks probably is your most experienced 300ex builder. I have an FST engine. Great engine, but if I were to do it again, I'd go with sparks on the 300ex.

Powroll only does kits, no work.

[Cody_300ex]

Originally posted by bwamos
I get 30-32 dyno'd out of the rear wheels on my 11:1 330ex.

If a 298 is running 13:1 it should be getting about the same power than I am. So his estimate isn't that far off. These are both FULLY built motors. Port, polish, cam, CDI, valves, springs, HC piston, carb, pipe, filter, etc...

Most of the big guys that have been around a while can get that power out of a 250x/300ex. Sparks, FST, DASA, etc..

Remember in the 1990's, the warrior and 300ex/250x were your 4-stroke choices for racing. ;) There's been a LOT of R&D on these 2 quads.

IMHO, Sparks probably is your most experienced 300ex builder. I have an FST engine. Great engine, but if I were to do it again, I'd go with sparks on the 300ex.

Powroll only does kits, no work.

Dont forget TC....

[reconmaster]

when i got the got w/b pipe the dyno sheet for a 250x/300ex was like up 18-20hp then 22-24 witha wisecoe 11:1 i think
i hope pnp cam and stiffer springs plus header will increase up to stock 400 or a lil higher

[bwamos]

Originally posted by Cody_300ex
Dont forget TC....

Yes, yes TC rocks as well. Thanks for the reminder!