Originally Posted by Jeffbucc
(Post 1224785)
Hmmm I'm interested in what a different Dyno would report then. It certainly doesn't feel like it spools that late/delivers power that slowly.
What are the right questions to ask the tuner to find the answers we are obviously lacking? Could my EBC to EWG routing have affected the spool? If it was truly that slow on power you'd think I'd be able to feel it compared to my 2860rs turbo. --Ian |
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OK so I got a hold of kyle who tuned the car and asked him why, compared to other similar builds it showed such negative performance and apparently in order for the Dyno to display the results on the Dyno he was using(not his own, a BMW shop's, he found that one of the sensors was faulty and had to deactivate it so it didn't go on the fritz when trying to get a plot. Also the power runs shown in the graph were done in fifth gear rather than 4th like I thought.
Here are the texts since he explained it better than I am. Attachment 237840 Attachment 237841 Attachment 237842 |
Makes sense to me :) Problem solved.
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That's a reasonable explanation for why the spool on the dyno was so bad -- just like if the run had been done in 2nd, with no load the motor is spinning up faster than the turbo can.
The only potential downside to this is that if it's not making full boost until, say 4500 RPM whereas it would make it at 3500 RPM on the street, that means there are a few cells that haven't been tuned on the dyno because he could never put the car into those cells. --Ian |
He tuned it with a load on it, just did the power pulls with no load. The load worked, but screwed up the graph if it was on.
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I feel for the guy. We owned a Dynocom unit for about 6 months in 2011. The manufacturer is beyond incompetent and the dynos are total junk.
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Originally Posted by aidandj
(Post 1224985)
He tuned it with a load on it, just did the power pulls with no load. The load worked, but screwed up the graph if it was on.
So the actual HP/TQ is accurate, just not the power in relation to RPMs, which is would show results much more in line with similar builds. So I hope to get a few runs this weekend on a different Dyno in Vegas this weekend when I go down for the autocross on Sunday. |
Correction. The torque would be accurate but shifted. The HP is a calculated number that requires accurate RPM as an input. You'll note that on your plot, you still crossed at 5250, even though the RPM is bogus. So . . . .
Enough drama. When is your track day? |
Originally Posted by hornetball
(Post 1224992)
Enough drama. When is your track day? I need to take a look at what events are happening soon and see what I can make. |
I come back from vaca and this thread has gone from awesome to over 9,000
well done el heffe that is some serious power and love the videos PS: and I too was shocked by the lack of low end torque but the dudes explanation does make sense to me too |
Originally Posted by 18psi
(Post 1225399)
I come back from vaca and this thread has gone from awesome to over 9,000
That is due to the advances in Turbo Encabulator technology! |
ah yes, there have been leaps and bounds in the fields of magneto-reluctance and capacitive diractance.
Awesome build, awesome numbers. |
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Originally Posted by Jeffbucc
(Post 1227580)
Finally got some pussy from
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just spell it phonetically like i did.
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I'd love to take a ride in your car sometime but after looking up your location I can understand why it's so tough to get a dyno. Maybe FM would be willing to open their doors for a few pulls? Not exactly close but hey you get to see FM...?
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Originally Posted by Der_Idiot
(Post 1228010)
I'd love to take a ride in your car sometime but after looking up your location I can understand why it's so tough to get a dyno. Maybe FM would be willing to open their doors for a few pulls? Not exactly close but hey you get to see FM...?
Right now waiting on a few AN fittings from Fab9 to solve my fuel leaking issue once and for all. 70 psi rail pressure is a bit much for hose clamps and LAPS fuel line apparently. Gonna have full -6an fuel lines off the rail to the fuel regulator. All the AN! |
Originally Posted by Jeffbucc
(Post 1228014)
Gonna have full -6an fuel lines off the rail to the fuel regulator. All the AN!
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Can he polish the braided hoses in the meantime?
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Originally Posted by rleete
(Post 1228121)
Can he polish the braided hoses in the meantime?
I would but I'm experimenting with push lock fittings for the fuel system for a variety of reasons. Plus, everything is E85 compatible if I ever get my hands on it down the road. (only in black) https://www.miataturbo.net/attachmen...ine=1430538199 http://www.russellperformance.com/mc...ges/side-7.jpg |
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