Lotus 50
Well-Known Member
Many of you have probably seen the debate on S&F about if an XB2002 can go 106 with a 200 Promax and a coned XR gearcase.
The closest similar claim I can dig up is John Tiger's Hotboat article on an XR2002. He had a 2.4 200 up to 98-99. Bolt ons, heads, tuner, reeds, reedcase, took it up to 104. Dyno numbers were dubious due to some carb problems, but around 205 stock.
A 2.5 200 Promax is probably stronger than a 2.4 200. The XR case should be good for a couple of mph. Is the XB2002 about as fast as an XR2002?
The fastest claim for a 200 on an XR2002 on the main page is Craig Creppel at 96.7.
The fastest claim for a 200 on an XB2002 on the intro page is Troy at 94.1
One thing I noticed reading through the boats from the main page is the efficiency of the Allys with low HP. Gains with big HP seem less than I would have expected, ie speed proportional to the square root of HP.
The closest similar claim I can dig up is John Tiger's Hotboat article on an XR2002. He had a 2.4 200 up to 98-99. Bolt ons, heads, tuner, reeds, reedcase, took it up to 104. Dyno numbers were dubious due to some carb problems, but around 205 stock.
A 2.5 200 Promax is probably stronger than a 2.4 200. The XR case should be good for a couple of mph. Is the XB2002 about as fast as an XR2002?
The fastest claim for a 200 on an XR2002 on the main page is Craig Creppel at 96.7.
The fastest claim for a 200 on an XB2002 on the intro page is Troy at 94.1
One thing I noticed reading through the boats from the main page is the efficiency of the Allys with low HP. Gains with big HP seem less than I would have expected, ie speed proportional to the square root of HP.