New exhaust/intake without Dyno
Road Captain
Joined: Apr 2013
Posts: 583
Likes: 4
From: australia
Lots of discussion and different opinion on this! I did mine with much ease as to buy the race tuner and harness for the laptop and download the software from HD !
http://prosupertuner.harley-davidson...uperTuner.aspx
Download proper setup and recalibrate ..... as simple as that
http://prosupertuner.harley-davidson...uperTuner.aspx
Download proper setup and recalibrate ..... as simple as that
with my bike, like you down load the map from dyno jet site by matching what you have ....I used map 3, and like you in 1 minute the bike is retuned.. no need for some one too thrash the life out off the bike... here in Australia if your caught 40km over the state limit you loose your liecence straight away and the bike impounded
Outstanding HDF Member
Joined: Aug 2012
Posts: 3,217
Likes: 90
From: Detroit
A couple of points worth mentioning:
An experienced dyno operator can spit out just about any numbers they want. Needless to say, the customer is happier and more impressed when they are a good deal higher after the tune.
Sometimes, a little more power can be found by compromising engine safety, like by adding more timing. It works fine until you get a tank of gas where the octane isn't quite up to snuff, or encounter some bad operating conditions.
Last time I had my blown 502 Chevy dyno'd, the operator gave me two sheets. He said, "This one is what your engine really did. This other one is to impress your friends."
An experienced dyno operator can spit out just about any numbers they want. Needless to say, the customer is happier and more impressed when they are a good deal higher after the tune.
Sometimes, a little more power can be found by compromising engine safety, like by adding more timing. It works fine until you get a tank of gas where the octane isn't quite up to snuff, or encounter some bad operating conditions.
Last time I had my blown 502 Chevy dyno'd, the operator gave me two sheets. He said, "This one is what your engine really did. This other one is to impress your friends."
Last edited by Warp Factor; Jan 26, 2014 at 06:34 AM.
Road Captain
Joined: Aug 2012
Posts: 658
Likes: 3
From: +^
A couple of points worth mentioning:
An experienced dyno operator can spit out just about any numbers they want. Needless to say, the customer is happier and more impressed when they are a good deal higher after the tune.
Sometimes, a little more power can be found by compromising engine safety, like by adding more timing. It works fine until you get a tank of gas where the octane isn't quite up to snuff, or encounter some bad operating conditions.
Last time I had my blown 502 Chevy dyno'd, the operator gave me two sheets. He said, "This one is what your engine really did. This other one is to impress your friends."
An experienced dyno operator can spit out just about any numbers they want. Needless to say, the customer is happier and more impressed when they are a good deal higher after the tune.
Sometimes, a little more power can be found by compromising engine safety, like by adding more timing. It works fine until you get a tank of gas where the octane isn't quite up to snuff, or encounter some bad operating conditions.
Last time I had my blown 502 Chevy dyno'd, the operator gave me two sheets. He said, "This one is what your engine really did. This other one is to impress your friends."
Outstanding HDF Member
Joined: Aug 2012
Posts: 3,217
Likes: 90
From: Detroit
I don't have the sheets here, but the curves are the same from the start of the pull (at 1500 rpm) till the end of the pull (at 7000 rpm). One is just higher than the other. In this case, the way it was done was to enter a different value when the torque sensor on the dyno was calibrated by attaching a weight on the end of a lever (engine dyno). Let's say the weight is supposed to register 200 ft/lbs. Instead of punching 200 ft/lbs into the program, a different number like 300 can be entered instead.
Road Captain
Joined: Apr 2013
Posts: 583
Likes: 4
From: australia
I don't have the sheets here, but the curves are the same from the start of the pull (at 1500 rpm) till the end of the pull (at 7000 rpm). One is just higher than the other. In this case, the way it was done was to enter a different value when the torque sensor on the dyno was calibrated by attaching a weight on the end of a lever (engine dyno). Let's say the weight is supposed to register 200 ft/lbs. Instead of punching 200 ft/lbs into the program, a different number like 300 can be entered instead.
Road Master
Joined: Aug 2012
Posts: 854
Likes: 20
From: CT
I don't have the sheets here, but the curves are the same from the start of the pull (at 1500 rpm) till the end of the pull (at 7000 rpm). One is just higher than the other. In this case, the way it was done was to enter a different value when the torque sensor on the dyno was calibrated by attaching a weight on the end of a lever (engine dyno). Let's say the weight is supposed to register 200 ft/lbs. Instead of punching 200 ft/lbs into the program, a different number like 300 can be entered instead.
Personally I have no interest in fooling anybody. This is not my business to run, and it's only a part of my job and one tool that I use. I'm all about learning new ways and the best products to make more power for myself and giving other riders the best I can. I just enjoy playing with bikes.
Last edited by vdop; Jan 26, 2014 at 08:57 PM.
Advanced
Joined: Jun 2013
Posts: 93
Likes: 1
From: Fort Worth
You can pick up additional HP on a stock car if you have it dyno tuned. Real power isn't seen from replacing exhausts and intakes anyway. They are complementary to real engine mods like cams, and forced induction (FI). It was FI and a good tune that took my car over 500HP, not an exhaust. As for the bike. Of course it will benefit from a tune, just depends on if the money it costs is worth to the owner to get slightly better HP/TQ numbers that will rarely been seen unless he is at WOT.
Outstanding HDF Member
Joined: Aug 2012
Posts: 3,217
Likes: 90
From: Detroit
Not accusing you of doing it, just that it can usually be done by someone who is familiar enough with their dyno setup and software, or has been instructed on how to do it by the dyno manufacturer or salesperson. (That last part came from a former chassis dyno salesman, it helped sales).
Anyway, the original question was whether a tune was needed to prevent damage with the installation of aftermarket exhaust and air cleaner.
Last edited by Warp Factor; Jan 27, 2014 at 05:21 AM.
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Elite HDF Member
Joined: Apr 2007
Posts: 3,766
Likes: 16
From: Roseville, CA
That was kinda the point. Its typically not even 5HP between tuned and canned. It might be but its more likely to be 2-3.
with stage-1 you will be lucky to find that much extra with a dyno tune over, say, a correct canned map.
Chances are they would have found a few more HP with a dyno tune.
with stage-1 you will be lucky to find that much extra with a dyno tune over, say, a correct canned map.
Chances are they would have found a few more HP with a dyno tune.
You can pick up additional HP on a stock car if you have it dyno tuned. Real power isn't seen from replacing exhausts and intakes anyway. They are complementary to real engine mods like cams, and forced induction (FI). It was FI and a good tune that took my car over 500HP, not an exhaust. As for the bike. Of course it will benefit from a tune, just depends on if the money it costs is worth to the owner to get slightly better HP/TQ numbers that will rarely been seen unless he is at WOT.
Now on a different dyno my baseline was 389hp/398?tq
That day the tuning took it to 398hp/422 tq
Race gas 413hp/432tq.
So 2-3hp maybe correct over a canned tune, but 5lbs ft tq is also very possible?
Last edited by Deuuuce; Jan 27, 2014 at 06:04 PM.
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