Horsepower gain with Webers

[Excaliber]

Point well taken Rick! Along those lines I would think a good Weber setup would work well on the street as well. Where low and mid range torque is the most common rpm range. Without consideration to price, or mpg, what is the down side for a street application?

From an mpg stand point it's as much about cruising range distance as it is about economics. I only have a 17 gallon tank! Even a slight improvement of mpg is a welcome relief from constantly having to watch the odometer or fuel gauge for my next gas stop!

[Tom Kirkham]

The pinnacle of carb development had to be the superbike engines of only a few years ago before they went EFI. They all ran IR manifolds...

For our Bonneville run I am sure we will run a single four. It is a lot funner to be running than tuning. Maybe after we get some salt under our nails...

[RICK LAKE]

sdfletch Fletch weber or olberg carb don't like alot of over lap in the cam shaft and a wide LSA setup of the camshaft 112 is min. A 114LSA is better. A quick lift camshaft with quick high lobe design and closing. Super charger or turbo camshafts work better than straight carb motors. I don't have the answer for the EFI question but in my motor, it doesn't seam to care with a pro tuning of the EFI system. I do have a torque issue with TOO much from 2,000 rpms to 3,000 rpms. I need to advance the camshaft to kill a little of the low end power. The reversion problem with over lap cams have a serious effect on the vacuum sign that these carbs need to work the best. Higher vacuum signal the better, steadier too. If the intake valve and exhaust valve are open at the same time, this causes reversion in the intake and up to the carb. This is why you see some weber motors spitting or a mist around the intakes. There is alot more to it than this but would take about 2-3 hours for a full theory explaination. Bottom line, they work better than a carb in mid range. They make more torque, don't worry about more HP. Torque moves the car not hp from a standing start up to went the torque curve drops below the HP curve that is still climbing. Rick L.