swooshdave wrote:I can't even afford to read this thread let alone image what one of those engines cost.
worntorn wrote:Terry's engine is 92 mm bore and 102mm stroke, identical with mine in displacement. Most components are also identical, however his engine runs 13 to one compression, fuel injection and methanol fuel. Mine is a street machine and runs 10.5 to one compression , 41 mm Dellorto Pumper carbs and premium pump gas. I have not had my engine on the dyno yet. It will produce considerably less Max power than Terry's, though still likely somewhere north of 100 rwhp, according to Terry.
Due to the light weight of the bike and the instant power delivery, I find that it hits harder than my 162 bhp Triumph Daytona.
Brutal is the best description of how the Vincent 1360 accelerates.
worntorn wrote:I've not worked it all out, but probably the costs are similar to building a real hotrod Norton engine, ie Full auto head further modded by Jim, billet cases, race crank, alloy barrels and tti trans , etc.
worntorn wrote:That's correct, .440" is valve lift.
I should point out that these heads appear outwardly to be the same as conventional Vincent heads, but are actually different in almost every way. Inlet port size on a standard Vincent head is 28mm, Terry's are at 42 mm (mine are at 38 mm)and very different in shape from many years of trial and error plus flow bench testing. Additionally, the combustion chambers are twin plug bathtub shaped with large squish vs single plugged hemi with no squish for a standard Vin. Exhaust ports are filled in at bottom to form a sideways D for exhaust reversion prevention.
He has also made improvements to the rocker bearings(doubled the surface area), improved the rocker oil feed connection to a leak proof design and added 25 % more fin area for cooling.
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