Stock 96 Twin Cam Hp and torque
#11
02-13-2008, 10:26 AM
RE: Stock 96 Twin Cam Hp and torque
ORIGINAL: rde
I was looking through my owners manual the other day and noticed that the listed torque for a stock 96@ 3500 RPM is 92.60 ft-lbs. That seemed rather optimistic, so I thought I'd check around.
At my dealership they had pulled a few stockers on a dyno in 07 at were getting 77.87 ft-lbs @ 3500 with a maximum 0f 62.61 Hp.
That's a pretty big difference. So what is the values for a stock 96? I'd like to know what the ballpark is before I get my bike dyno'd in a couple weeks.
I was looking through my owners manual the other day and noticed that the listed torque for a stock 96@ 3500 RPM is 92.60 ft-lbs. That seemed rather optimistic, so I thought I'd check around.
At my dealership they had pulled a few stockers on a dyno in 07 at were getting 77.87 ft-lbs @ 3500 with a maximum 0f 62.61 Hp.
That's a pretty big difference. So what is the values for a stock 96? I'd like to know what the ballpark is before I get my bike dyno'd in a couple weeks.
#12
02-13-2008, 10:56 AM
RE: Stock 96 Twin Cam Hp and torque
I believe that there can be a big different in Dyno runs and although I didn't get high numbers what I did get was the Tq that peaked at 2,300 rpm instead of 3,000 rpm, lasting thru 4,000 rpm instead of falling off at 3,500 rpm. This is just the difference in the map tune and a Dyno tune, not the stock numbers....it also fattened up the air/fuel mixture up to 3,700rpm where they where almost the same to 6,200rpm.
#13
02-13-2008, 11:55 AM
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RE: Stock 96 Twin Cam Hp and torque
ORIGINAL: jeeplite
I believe that there can be a big different in Dyno runs and although I didn't get high numbers what I did get was the Tq that peaked at 2,300 rpm instead of 3,000 rpm, lasting thru 4,000 rpm instead of falling off at 3,500 rpm. This is just the difference in the map tune and a Dyno tune, not the stock numbers....it also fattened up the air/fuel mixture up to 3,700rpm where they where almost the same to 6,200rpm.
I believe that there can be a big different in Dyno runs and although I didn't get high numbers what I did get was the Tq that peaked at 2,300 rpm instead of 3,000 rpm, lasting thru 4,000 rpm instead of falling off at 3,500 rpm. This is just the difference in the map tune and a Dyno tune, not the stock numbers....it also fattened up the air/fuel mixture up to 3,700rpm where they where almost the same to 6,200rpm.
Here you show exactly what matters. You are making power sooner, lasting longer, and running cooler probably to boot. These are the things that matter.
#15
02-13-2008, 01:05 PM
RE: Stock 96 Twin Cam Hp and torque
IF NEED MORE POWER THEY MAKE ENGINE WITH POWER
ProMotorsTM for the Street. Hyperformance manufactures bolt on fin sections to turn the Pro racing heads into Pro heads for the street. THe first street ProMotor was built in a 190 cubic inch configuration for the Radical Cycle Predator (see RadicalCycle.com). The 2nd street ProMotor was built in a 205 cubic inch configuration for Doc Hopkins (see DocsHD.com) for the Woody. The 3rd is a massive 260 cubic inch Monster built for Radical Cycle Predator #2.
ProMotorsTM for the Street. Hyperformance manufactures bolt on fin sections to turn the Pro racing heads into Pro heads for the street. THe first street ProMotor was built in a 190 cubic inch configuration for the Radical Cycle Predator (see RadicalCycle.com). The 2nd street ProMotor was built in a 205 cubic inch configuration for Doc Hopkins (see DocsHD.com) for the Woody. The 3rd is a massive 260 cubic inch Monster built for Radical Cycle Predator #2.
#16
02-13-2008, 01:20 PM
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RE: Stock 96 Twin Cam Hp and torque
Also, you will usually find a significant difference in measures taken on different dynoes.
For this reason, before any modification, it's better to measure the vehicle on the same dyno that will be used to test it AFTER the tuning.
For this reason, before any modification, it's better to measure the vehicle on the same dyno that will be used to test it AFTER the tuning.
#17
02-13-2008, 01:48 PM
RE: Stock 96 Twin Cam Hp and torque
I don't think the 92.6 lb-ft is correct. The difference between claimed crank TQ and actual dyno TQ seems to big, around 16%. Something is wrong here.
If you look at Harleys website the stock TC96 is rated 86 lb-ft in the engine. That seems more likely. Then we have ~10% difference between the claimed crank TQ and rear wheel TQ.
If you look at Harleys website the stock TC96 is rated 86 lb-ft in the engine. That seems more likely. Then we have ~10% difference between the claimed crank TQ and rear wheel TQ.
#18
02-13-2008, 07:39 PM
RE: Stock 96 Twin Cam Hp and torque
That is in line with the 77.87 TQ the dealership measured on the TC 96. Just wanted something to get in the ballpark.
I suppose ideally you want to see your maximum TQ sustained ( somewhat flattened curve ) from about 2500 RPM through 4000+ RPM's rather than see a continued upward slope on the TQ until it reaches maximum around 3500-4000+ RPM's. You want it in the normal RPM range you ride with.
Only the hp curve should continue to slope upwards until peak which would be in the 5000+ RPM's
I think I got it now!
I suppose ideally you want to see your maximum TQ sustained ( somewhat flattened curve ) from about 2500 RPM through 4000+ RPM's rather than see a continued upward slope on the TQ until it reaches maximum around 3500-4000+ RPM's. You want it in the normal RPM range you ride with.
Only the hp curve should continue to slope upwards until peak which would be in the 5000+ RPM's
I think I got it now!
#19
02-14-2008, 01:30 AM
Outstanding HDF Member
RE: Stock 96 Twin Cam Hp and torque
HD measures @ the crank - the dyno measures at the rear wheel.
#20
02-14-2008, 01:37 AM
RE: Stock 96 Twin Cam Hp and torque
Remember you don't ride a dyno ar a factory posting.
In the end all that matters is perceptionfrom the saddle.
It's only funny till someone gets hurt........................then it's friggin hilarious
In the end all that matters is perceptionfrom the saddle.
It's only funny till someone gets hurt........................then it's friggin hilarious
