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Old 01-07-2008, 10:47 AM   #1 (permalink)
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96 Engine Specs

I've searched the threads and google and can't seem to find some specific info on a stock 96" engine. I'm looking for the Min RPM, Max RPM, Shift Up RPM, Shift Down RPM, & Max Power RPM. Anyone know this info? I probably missed it or mis-typed in my search. Thanks
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Old 01-07-2008, 12:31 PM   #2 (permalink)
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I don't understand the question. I ride higher than most in the rpm range so my shift points wouldn't be anywhere close to minimums. Most guys lug these motors around shifting at or below 3.5k. BTW, 3.3k is where the fun starts
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Old 01-07-2008, 12:44 PM   #3 (permalink)
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This is info I need for a gearing worksheet in excel. Most engines have a "standard" shift RPM, even though most if not all don't use it.
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Old 01-07-2008, 03:02 PM   #4 (permalink)
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idle rpm: 1050 +/- 50
rpm max: 5500
shift point varies to rider (I shift high for VROOM, shift low for calm riding)
downshift point same, but avoid heavy downshift, you could throw your crank out

Most of this should be in the Owners Manual, or the Maintenance Book

I have a max-rpm comparison exell sheet avail if you'd like to see it (theoretical max speeds calculated from engine gearing, rpm, and rear tire sizes)

My FXD theoreticly maxes at 158...does it actually have the power to do that? most likely not ...but its fun trying!
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Your Milage May Vary, You Get What You Pay For, There Aint No Such Thing As A Free Lunch, Who Is That Masked Man?

I'm not yet at the exact level of boredom required to taste the cat.

'04 TC103 FXD
SE 4.375" Stroker Crank
SE 3.875" Flat top Pistons
SE 211 cams
Modified/Revalved Chevy Lifters
SE A/C
SE 2 Slip-Ons
Big City Thunder TMSEII Baffles
SE 6200 RPM Ignition module
SE Clutch spring
White Bros E-Z clutch release
LMR2 oil pressure spring
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Old 01-07-2008, 05:22 PM   #5 (permalink)
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Quote:
Originally Posted by Rockbiter View Post
idle rpm: 1050 +/- 50
rpm max: 5500
shift point varies to rider (I shift high for VROOM, shift low for calm riding)
downshift point same, but avoid heavy downshift, you could throw your crank out

Most of this should be in the Owners Manual, or the Maintenance Book

I have a max-rpm comparison exell sheet avail if you'd like to see it (theoretical max speeds calculated from engine gearing, rpm, and rear tire sizes)

My FXD theoreticly maxes at 158...does it actually have the power to do that? most likely not ...but its fun trying!
That's the info I needed, Thanks Scott!
Shoot that excel sheet to me, home email will be fine. If you forgot it check your PMs
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Old 01-07-2008, 07:05 PM   #6 (permalink)
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Quote:
Originally Posted by Rockbiter View Post
idle rpm: 1050 +/- 50
rpm max: 5500
shift point varies to rider (I shift high for VROOM, shift low for calm riding)
downshift point same, but avoid heavy downshift, you could throw your crank out

Most of this should be in the Owners Manual, or the Maintenance Book

I have a max-rpm comparison exell sheet avail if you'd like to see it (theoretical max speeds calculated from engine gearing, rpm, and rear tire sizes)

My FXD theoreticly maxes at 158...does it actually have the power to do that? most likely not ...but its fun trying!
GREAT Expalnation! Good job. And it it is fun trying!
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Old 01-07-2008, 08:17 PM   #7 (permalink)
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I have it all on exel also .I have it fo r the 06 and under 5 speed and the 07 6 speed and the 6 speed with the 30 tooth sprocket replacing the stock 34toother. I tryed for a couple hrs to post them all but I couldnt get it to work. I keep the 30 tooth spreadsheet in my wallet(dont need a tack)for reference. The following is a 30 tooth example: I like to shift into 2nd at around 30mph or 4000rpms then into third at alittle over 40 which is around also around 4000 in second gear. When i want to be alittle more aggressive (very often) Ill shift at 35mph into second (almost 5000rpms) then into third at around 50-55 which is 4800 to 5300rpms. Its all write on the sheet .Its a shame I cant figure out how to post it for yas.
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Old 01-07-2008, 09:49 PM   #8 (permalink)
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Quote:
Originally Posted by Rockbiter View Post
idle rpm: 1050 +/- 50
rpm max: 5500
shift point varies to rider (I shift high for VROOM, shift low for calm riding)
downshift point same, but avoid heavy downshift, you could throw your crank out

Most of this should be in the Owners Manual, or the Maintenance Book

I have a max-rpm comparison exell sheet avail if you'd like to see it (theoretical max speeds calculated from engine gearing, rpm, and rear tire sizes)

My FXD theoreticly maxes at 158...does it actually have the power to do that? most likely not ...but its fun trying!
If I shift when the 07 owners manual tells me to I would be lugging the bike.
Pretty much a known fact that it is incorrect.

The 96" likes a little more rpm due to the taller gearing, easy to lug if coming off a 88" IMHO.
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Old 01-07-2008, 10:23 PM   #9 (permalink)
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If I understand what wpnssgt is trying to do, is recreate one of those speed/rpm/gear charts like they use in those sport/tuner mags, showing the "performance envelope" of the vehicle. I've wanted to do that for years, but couldn't wrap my brain around Excell well enough to make it create the chart properly (I think you need to create an algorythm for each gear/rpm to show the speed, then overlay all 5 (6) speeds to see the final graph...)


I hope it works wpnssgt, I wanna convert it to my bike to see how mine fares
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Your Milage May Vary, You Get What You Pay For, There Aint No Such Thing As A Free Lunch, Who Is That Masked Man?

I'm not yet at the exact level of boredom required to taste the cat.

'04 TC103 FXD
SE 4.375" Stroker Crank
SE 3.875" Flat top Pistons
SE 211 cams
Modified/Revalved Chevy Lifters
SE A/C
SE 2 Slip-Ons
Big City Thunder TMSEII Baffles
SE 6200 RPM Ignition module
SE Clutch spring
White Bros E-Z clutch release
LMR2 oil pressure spring
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Old 01-08-2008, 09:00 PM   #10 (permalink)
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Quote:
Originally Posted by Rockbiter View Post
idle rpm: 1050 +/- 50
rpm max: 5500
shift point varies to rider (I shift high for VROOM, shift low for calm riding)
downshift point same, but avoid heavy downshift, you could throw your crank out

Most of this should be in the Owners Manual, or the Maintenance Book

I have a max-rpm comparison exell sheet avail if you'd like to see it (theoretical max speeds calculated from engine gearing, rpm, and rear tire sizes)

My FXD theoreticly maxes at 158...does it actually have the power to do that? most likely not ...but its fun trying!
Wide open on my 07 softail would only hit 120 and it took way to long to get there.
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Old 01-08-2008, 09:12 PM   #11 (permalink)
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Quote:
Originally Posted by d1hojo View Post
Wide open on my 07 softail would only hit 120 and it took way to long to get there.
Did you enjoy it or were you looking for a quick finish?
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Old 01-09-2008, 08:35 AM   #12 (permalink)
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Quote:
Originally Posted by d1hojo View Post
Wide open on my 07 softail would only hit 120 and it took way to long to get there.

There is a big diffrence between theoretical max speed and actual max speed. My 04 Superglide (when stock) was like yours, could only manage 115-120.

Now add a high rpm ignition module, big bore engine, and a decent size pair of cajones, and you can easily achieve ...ahem...more interesting max speed numbers.

When you calculate the theoretical max speed, it ONLY takes into account engine RPM multiplied by primary gearing, transmission gearing, final drive gearing, and rear wheel circumfrence. It does not figure in engine power, drag, that extra piece of pie you had for dinner, or any other factor.

With a stock 04 FXD TC88, you might get numbers like this (please forgive the poor formating, excell does not seem to transfer well in this format, also, numbers used are best approximations from published tech data):

Bike Datails 04 FXD Stock
Max Engine RPM 5200
Primary Drive Ratio 1.440
Final Drive Ratio 2.188
Rear Wheel Radius in Inches 13
Max Clutch RPM 3611.111
Rear wheel cir in inches 81.68
Inches in a mile 63,360

Gear Number 1 2 3 4 5
Ratio 3.206 2.208 1.572 1.226 1.000

Calculate Numbers
Max Wheel RPM 514.969 747.512 1,050.109 1,346.760 1,651.171
Max inches per minute 42063.40703 61057.83428 85774.36119 110005.2851 134869.9717
Mechanical Speed MPH per gear 39.83 57.82 81.23 104.17 127.72

With my bike, a mildly modified 04 FXD TC103 you might get numbers like this:
Bike Datails FXD
Max Engine RPM 6200
Primary Drive Ratio 1.440
Final Drive Ratio 2.188
Rear Wheel Radius in Inches 13
Max Clutch RPM 4305.556
Rear wheel cir in inches 81.68
Inches in a mile 63,360

Gear Number 1 2 3 4 5
Ratio 3.206 2.208 1.572 1.226 1.000

Calculate Numbers
Max Wheel RPM 614.002 891.264 1,252.053 1,605.753 1,968.704
Max inches per minute 50152.52376 72799.72549 102269.4306 131160.1476 160806.5048
Mechanical Speed MPH per gear 47.49 68.94 96.85 124.20 152.28


This is not really usefull in real life, but it is interesting from a thoretical standopoint.
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YMMV, YGWYPF, TANSTAAFL, WITMM?
Your Milage May Vary, You Get What You Pay For, There Aint No Such Thing As A Free Lunch, Who Is That Masked Man?

I'm not yet at the exact level of boredom required to taste the cat.

'04 TC103 FXD
SE 4.375" Stroker Crank
SE 3.875" Flat top Pistons
SE 211 cams
Modified/Revalved Chevy Lifters
SE A/C
SE 2 Slip-Ons
Big City Thunder TMSEII Baffles
SE 6200 RPM Ignition module
SE Clutch spring
White Bros E-Z clutch release
LMR2 oil pressure spring
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Old 01-09-2008, 05:31 PM   #13 (permalink)
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Quote:
Originally Posted by NewHawk View Post
Did you enjoy it or were you looking for a quick finish?
It was fun, it just kinda pissed me off that it took so long between 110 to 120.
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Old 03-08-2008, 08:54 PM   #14 (permalink)
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I looked for a good RPM vs MPH chart also,
Go to Nightrider.com or search Nightrider... In the lower right corner in home page you can click on rpm vs mph, enter your gear ratios and print out in a bunch of ways of your picking... it is a very usefull chart...
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