Harley Sportster at Wilmington

[TurboCat]

If you're making 110 Hp and plan on running 7000 RPMs the 32/68 will put you in the mid 140's, with a good tuck you could see that, maybe.

The same numbers with the 32/61 would put you in the mid 160's, that ain't going to happen, unless you truly have a War Horse.

Rouse

If I can reach 140mph in a standing mile with any gear I will leave satisfied. Not having any experience in this I am just guessing here. From previous experiences on the drag strip I am wondering if it might prove beneficial to lower the rpm target somewhat...effectively moving back towards the torque curve before it begins to fall off thinking the bike may "pull" harder in that range. I know it is a narrow window of opportunity and wind resistance is the enemy here, but do you think I am on the right track in this thinking? I have no illusions of doing 160mph on this bike at any distance lol...just seeking ways to maximize what I have to work with. Thanks!

EDIT:  It's looking like a 30T/61T might be the happy medium.

[rouse]

I think it would be to your advantage to go the other way Something like 31 or even 30 on the drive pulley. Haven't looked at those combo's as far as your speed but, I went that way with mine.

Rouse

[TurboCat]

I think it would be to your advantage to go the other way Something like 31 or even 30 on the drive pulley. Haven't looked at those combo's as far as your speed but, I went that way with mine.

Rouse

Do you have a picture of your bike Rouse?

[rouse]

That's the bike on my avatar,

I hope the picture comes through.

This bike has been 152.5 at the Texas Mile 155+ at Bonneville Record is 153.352, in testing has been 159+, Hell of a ride with front controls.

Rouse

[TurboCat]

Looks like a showpiece!    I can't imagine trying to keep my feet on those forward's at that speed lol! I'll need all the help I can get.

[rouse]

If this link will work, it has sound.

http://www.youtube.com/watch?v=XAqGf_ZKNAQ

Rouse

[TurboCat]

What range of afr's should I be shooting for with this 1250 at WOT? Would 13.0 be too rich to still pull hard at high rpm? Being efi I can easily massage numbers.

[relaxedphit]

Rouse, beautiful bike and fast too. I noticed the frame is set up to use mid pegs/controls. Do you have to do special conditioning to strengthen your leg for shifting forward controls at your speeds?

[rouse]

The bike rolled off the showroom floor just like it is with forward controls, so that's the way that I ran it. In order to change to mid controls the primary cover would have to be changed and that would have knocked it out of the "P" class.

It is a trick to keep your feet on the pegs after about 130 and up. I am in pretty good shape, but you have to get good at "bear hugs" with your legs, kinda  like riding a bull ya know.

The seat is very flat "small hump on the back" also, that makes it important not to let go or you'll blow of.

Arm strength is must to ride this bike, I'd have to guess, but at speed, the tug on my arms has to be over 200#, way over.

Rouse

[o1marc]

I think some of you are dreaming. If you look at the current records I don't think hitting 140 is achievable with an unfaired 1000cc PG bike. There is no M/PP class. M/PG 1000/4 record is only 105.8075 and is the only existing record in the 1000cc pushrod class at Wilm. The Modified Partial Streamlined Pushrod Gas 1350/4 record is only 139.4500, the MPS/PFuel 1350/4 record is slower at 131.0958. Surprisingly the M/PG 1350/4 record is at 141.9558 and the only one above 144mph is the M/PF 1350/4 class at 150.4011, The latter 2 set this weekend.
I think I may have set my sites too low. I have a 1327cc Sputhe XR twin carb heads full faired, 360lb 62 Sportster. I'd be happy to go home with a 140mph record.

[TurboCat]

I think some of you are dreaming. If you look at the current records I don't think hitting 140 is achievable with an unfaired 1000cc PG bike. There is no M/PP class. M/PG 1000/4 record is only 105.8075 and is the only existing record in the 1000cc pushrod class at Wilm. The Modified Partial Streamlined Pushrod Gas 1350/4 record is only 139.4500, the MPS/PFuel 1350/4 record is slower at 131.0958. Surprisingly the M/PG 1350/4 record is at 141.9558 and the only one above 144mph is the M/PF 1350/4 class at 150.4011, The latter 2 set this weekend.
I think I may have set my sites too low. I have a 1327cc Sputhe XR twin carb heads full faired, 360lb 62 Sportster. I'd be happy to go home with a 140mph record.

2001 Bonneville I believe...139mph and change with this 1000cc P/PP Sportster. Aaron from Hammer Performance was there for this one.  http://thecyberzoo.com/imgshr/xlf-files/800-ls00r-2001.html



I know the current record is very soft for a 1000cc pushrod...a showroom bike is capable of that.

[o1marc]

At Bonneville I believe it. No one is there yet at Ohio. There is a 50mph difference with our car at Bville than at Ohio. I imagine the spread may not be as big on a bike but a spreadjust the same.

[TurboCat]

At Bonneville I believe it. No one is there yet at Ohio. There is a 50mph difference with our car at Bville than at Ohio. I imagine the spread may not be as big on a bike but a spreadjust the same.

Lets put it in this perspective...a typical 883/1250 conversion Sportster is currently turning out 1/4-mile speeds of 120mph on average. We are talking another 3/4-mile to bring up the speed. The bike pictured above began as a 2000 883 and was punched out to 997cc with pistons/head work/compression ratio far outstripping current 1250 builds. I have confidence the 1000cc bike would seriously crowd my 1250 in a miles distance.

[rouse]

At Bonneville I believe it. No one is there yet at Ohio. There is a 50mph difference with our car at Bville than at Ohio. I imagine the spread may not be as big on a bike but a spreadjust the same.

The speed difference is not that big at Bonneville for bikes under 175 mph.  I ran the Texas mile at 152.518, then turn around and ran 154.081 on the salt.

The over 175 cars and bikes get another 2 miles to run up the speed "if they can" so you're likely to see a more speed.

The air is thinner at Bonneville so you lose Hp, however, it's easier to run through.

Rouse

[TurboCat]

Finally got a front fender on this bike...all is right in the world now.