ritzblitz

Well i didnt know where else to put this.

A guy I work with has a chopper with a modified HD Screamin Eagle 103. He told me it's worked all the way and now its a 130 inch motor(2.1L). He also claims it made 270hp at the rear wheel. I have a very hard time believing this and just want to make sure that hes bsing.

Has anyone ever seen a HD vtwin make this kind of power naturally aspirated?

Larry Herman

The guy was FOS! No way they can even get close. They don't have the breathing nor the head cooling for that kind of power. The best I've heard for those big inch Harley motors is about 1/2 that.

nmercier853

Let me put it this way. Ducati's Moto GP Bike produces 240hp at the crank and it last 1 race & 1 Qualifing session (3hrs max).

These is no possible way unless he is running nitro methane and rebuilds it after every stop light like the drag bikes.

Kurt R

S & S Cycle builds a 300 hp normally aspirated engine, it just doesn't look much like a Harley engine anymore.

More than 150 on a street bike? Doubtful.

ritzblitz

That's what I thought. I didn't want to call him out on it since I don't know much about the engines, but comparing it to other motors it just seemed ridiculous. I'd think that the castings would blow up with that kind of power. That S&S motor is definitely billet, hence 300bhp

He also said he did 190 on the bike.

va122

190 on a HARLEY?? No frigging way. No way you'll get up there with no farings. And if you did with his nitro motor the wind would knock him clean over.

Oh and i call bull**** on the 270 to the wheel. 100k motoGP bikes can't do that. Turbo busa's sure. but a twin, no way.

Greg Smith

A Moto GP bike is also .8L, roughly 1/3 the side of 2.1L. Is it true? I don't know. I wouldn't be ultra surprised if it was though.

Larry Herman

Oh please. You couldn't go 190 on a Harley if you drove it off a cliff..............which actually isn't a bad idea. Maybe you should suggest to this guy that he try it!

ritzblitz

I want to ask if he runs 150 octane fuel in it and see what he says hahaha

mark kibort

Those little honda 1.8 liters can do it, but they are 4 bangers but still, NA. I think hondatech had a 300frwhp motor that was running Speed Touring. The Honda S2000 I run with has a blower on it and its making 500rwhp on 17psi of boost using a 2.2 liter.

edit: quick google found 233rwhp for a NA vtwin at 114CI

• 600cc Sportbike: Kelly Bryant - ‘07 Yamaha R6 - 113.3hp
• 750cc Sportbike: Art Haserjian - ‘05 Suzuki GSXR750 - 121.87hp
• 1000cc Sportbike: Kerry Bryant - ‘04 Kawasaki ZX10 - 161.4hp
• Open Sportbike: Thad Wiltz - ‘04 Kawasaki Hayabusa - 227.52hp
• Sportbike/Turbo: John Noonan - ‘03 Hayabusa - 490.63hp
• Sportster/Buell: Bennett’s Performance ‘00 Special Const. S&S - 125.29hp
• V-Twin - 74 - 80″: Mark Mignella - ‘04 Harley-Davidson V-Rod - 101.27hp
• V-Twin - 81 - 88″: John Cabral - ‘08 Harley-Davidson V-Rod - 153.82hp
• V-Twin - 89 - 95″: Andrew Demotte - ‘06 Harley-Davidson FLHX - 103.69hp
• V-Twin - 96 - 113″: Patrick Racing - Harley-Davidson Twin Cam - 118.59hp
• V-Twin - 114″ Plus: Bennett’s Performance ‘96 Bonneville Bike - 223.00hp
• V-Twin/Turbo: John Cabral - ‘99 Harley-Davidson FLH Bagger - 233.78hp

mk