| Author | Message | ||
     X1_rider |
I found this website that offers throttle body boring service for Buells (to 50mm) (scroll down the page a bit). http://www.bcheads.com/fuel.htm Has anyone ever tried it when going to a bigger engine size instead of switching to carb? What other throttle body options/upgrades are available? | ||
| Preybird1 |
I have a 1250 kit on my bike and i never had the TB bored out and i am getting 135hp at the motor after a custom mapping. But it would help if you are doing a bigger motor. | ||
| Firemanjim |
We have done it on a couple of the 90" bikes with lots of cam but not needed on the smaller motors. They do good work. Done a few big inch HDs as well.They are making a new throttle shaft for Terry as the one on his Uly just broke. | ||
| X1_rider |
Preybird1, what kit (cylinders/heads/cams) are you running? What intake and exhaust are you running? FMJ, so for a 1250, it would be overkill? I looked at Horsepower Inc. but they don't work on Buell TB's, just Harley. | ||
| Ratbuell |
I've played with larger throttlebodies on my turbocars. Stock for the 2.2 turbo is 46mm, 12psi stock boost level. I've upped the boost to beyond 26psi with a stock TB (with fuel and mapping to go with it, including Mopar Performance +40% injectors and an adjustable fuel pressure regulator), and run 11's in a Dodge Shadow stickshift front wheel drive with street tires. Dyno was 296 at the wheels, turbo was a 70 trim Garrett with an intercooler. I've swapped the same car over to a 52mm TB (stock on a V6 minivan), and a 58mm TB (stock on a Jeep 4.0)...and gone SLOWER. I've noted a hair more midrange with the larger TB...but that's about it. And I only notice it if I'm *looking* for it - it's not a WOW, where'd THAT come from? kinda feeling... For my money...don't spend on a TB, spend it elsewhere until the TB becomes a bottleneck. It'll take a while before you reach that point. |
