100 ft lbs to the tire. Under 1200cc’s

[mike lowary]

I have the potential of hitting this mark. I’m having trouble finding other people who have. Anybody here done this?

 

[34nineteen]

You should check out the Hammer site, as he has a section where he posts dyno results.

That’s a pretty lofty goal with that displacement and being NA. I’m not saying you can’t but you’d probably need a 90” motor to make it happen.

 

[34nineteen]

And say it with me everyone:

Cooter is wrong!

 

[mike lowary]

You should check out the Hammer site, as he has a section where he posts dyno results.

That’s a pretty lofty goal with that displacement and being NA. I’m not saying you can’t but you’d probably need a 90” motor to make it happen.

I’ve looked at the hammer site. And other places. It seems that not too many people have done the short stroke big bore motor. Haven’t seen a dyno chart. I saw a post of a race bike for sale with the same motor. Guy said it made 110hp 98tq. No dyno chart.

 

[mike lowary]

This is an 88” big bore kit. Since I’m using a 9 crank it drops the cubes to a little over 71”. The piston diameter is there. The rpms are there. On paper it’s interesting to look at. Seems most people are smart enough to not go down this road.

 

[34nineteen]

Yeah, but you’ll probably make more power overall.

Torque ratings usually max out in the middle of the power band, so revving very high probably isn’t going to help that.

Yeah, your going down a different path than most harley people, but that’s what will make this much more fun and entertaining.

 

[34nineteen]

I think this motor is going to be badass. It may not be the typical Harley stump puller motor, but I think it will be special in other ways. I wouldn’t hesitate to go down the path you are one. The 88” jugs and destroked motor with an uber balanced and strong crank should be a lot of fun. Hopefully you are doing some headwork to compliment this.

 

[mike lowary]

Stage 2 heads, xb12 header, 12 throttle body, cat 3 cams. Using the same stuff I had on the 1050 kit but now it’s gonna be 1170.

 

[mike lowary]

I have a new set of 60lb injectors on the shelf too in case I need them. Doubt I will

 

[34nineteen]

Thats still a lot displacement, and at higher rpms, you may need those injectors.

I'm not saying your motor isnt going to be a beast, its just that 100ft lbs may be a little lofty at that displacement.

 

[mike lowary]

Challenge accepted

 

[mike lowary]

Gentleman’s bet says I hit 100 tq to the tire. That’s 1$ for anybody who hasn’t seen trading places.

 

[outthere]

What are you going to do with it? Race it at a drag strip, on a road course or just play?

 

[mike lowary]

Street only just play

 

[mike lowary]

I’ll definitely post up dyno numbers when the time comes. I hate not having a baseline though. Luckily I just bought a new to me 03 xb9s. Has drop in k&n and race muffler with race maps. I’ll have that bike dynoed first for the baseline then do the 1170. At least we’ll have something to compare to off that individual dyno.

 

[34nineteen]

Gentleman’s bet says I hit 100 tq to the tire. That’s 1$ for anybody who hasn’t seen trading places.

I’m not going to take that bet, cause if anyone can do it, it will be you.

It’s not going to be easy, but you can pull it off.

Hopefully you don’t cook your stator in the process ‘cause you’ll never find one of those.

 

[Cooter]

I'd love to disagree but I bet you do it, or at least get damn close What a wild ride that would be in a revvy V-twin!

Wheelie time!!




But I'm WRONG

 

[mike lowary]

I'd love to disagree but I bet you do it, or at least get damn close What a wild ride that would be in a revvy V-twin!

Wheelie time!!






But I'm WRONG

Of corse you are.

 

[34nineteen]

I dunno. I was looking at those dyno charts on Hammers page and the Sportster guys who got to 100 torques, went all out. There’s a couple in there with higher torque ratings, but they are big twins with 98” kits.

It’s going to be a different beast than those, though. It’s probably going to smash all the 90” kits since it should be able to take advantage of the extra RPM. Aside from the 90” kits where they went all out also.

 

[Cooter]

Man it's gonna be CLOSE. Friend of mine built this XB a couple months back:



Just barely eclipses 100lb/ft. It is a 1275 kit but I really don't remember him doing anything extravagant to it. Nothing one-off custom for sure. Lots and lots of tuning.