Hillside Build Numbers
Intermediate
Joined: Jan 2010
Posts: 29
Likes: 0
From: Kingston,TN
Yes I talked with Scott and we both thought it should be a little higher in tq and hp.
He is sending me one of his hi flow air filters to have the tuner try.
Unless it has jets or a needle to move/change I know nothing about tuning it so I have to rely on the dealer, they did tell me they had their best man on it 20yr of exp. So I have around $290.00 in the tune so far and to have them re-run/tune it now with the new air filter they said they would charge me the hourly rate.
Thats the problem with a lot of the builds, you can have the best parts and setup and the tuner has you by the *****!!
Stellar HDF Member
Joined: Sep 2007
Posts: 2,434
Likes: 658
From: Vancouver Island B.C.
Just have your tuner make a run and then remove the air filter and make another run. You will see right away if it is your air filter. But as mentioned before don't get to worried about the numbers. There are variables like humidity that can affect the numbers.
Intermediate
Joined: Jan 2010
Posts: 29
Likes: 0
From: Kingston,TN
Your just jelous.. You even said they souned good (when you were behind me)
Qestion for you guys.
If I get the afr from the run can you tell from it if it is a good tune??
Qestion for you guys.
If I get the afr from the run can you tell from it if it is a good tune??
Seasoned HDF Member
Joined: Dec 2005
Posts: 5,450
Likes: 593
Problem with the AFR trace on a dyno sheet is it only represents WOT and only one cylinder. The WOT part isn't such a big problem because you are chasing a peak number, but the one cylinder part is. If your dyno tech is tuning one cylinder only, then copying that map to the other cylinder, you are not going to get the most out of the build.
So to answer your question, yes some on here could give you a good idea if the tune is out of whack, but there are many other components to the tune that could be holding it up that wouldn't show up.
Zach
So to answer your question, yes some on here could give you a good idea if the tune is out of whack, but there are many other components to the tune that could be holding it up that wouldn't show up.
Zach
Member
Joined: Jul 2009
Posts: 4,310
Likes: 1,079
Problem with the AFR trace on a dyno sheet is it only represents WOT and only one cylinder. The WOT part isn't such a big problem because you are chasing a peak number, but the one cylinder part is. If your dyno tech is tuning one cylinder only, then copying that map to the other cylinder, you are not going to get the most out of the build.
So to answer your question, yes some on here could give you a good idea if the tune is out of whack, but there are many other components to the tune that could be holding it up that wouldn't show up.
Zach
So to answer your question, yes some on here could give you a good idea if the tune is out of whack, but there are many other components to the tune that could be holding it up that wouldn't show up.
Zach
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Banned
Joined: Sep 2009
Posts: 7,580
Likes: 7
From: The Internet (& Dyer, Indiana)
This is true however if the afr shows the tune to be far too rich or far too lean, then you can be assured that the map being used is leaving alot of power in the engine instead of at the rear wheel. Even from the 1 cyclinder reading you can tell if the tune has alot of room to improve.
Member
Joined: Jul 2009
Posts: 4,310
Likes: 1,079
I absolutely agree however if the AFR is shown to be way off on this 107 build, it could be an explanation for the lower than expected performance numbers. If the AFR looks smooth through the rpms at around 13.2 then I would say he needs to be looking at exhaust, timing or both.
If the AFR is a mess and showing multiple lean and overly rich conditions than I would suggest he simply has the result of a poor tuning effort and should consider starting over, possibly with a different shop.
If the AFR is a mess and showing multiple lean and overly rich conditions than I would suggest he simply has the result of a poor tuning effort and should consider starting over, possibly with a different shop.