:( ...(aka non-descriptively-titled dyno fail thread) - Miata Turbo Forum - Boost cars, acquire cats.

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Old 06-17-2013, 06:01 PM   #1
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Default :( ...(aka non-descriptively-titled dyno fail thread)

I'm not happy. We spent most of dyno fixing the car. This is wastegate pressure with the fuel dialed in and a little timing added. They were trying to get me off the dyno to get a racecar on there, because they have a TnT tomorrow that they're trying to get to.



Boost actually creeps up to almost 10 and then drops off again. It did hit 12 psi at one point because the wastegate arm was hitting the V-Band clamp, we spent a while twisting the clamp. I think I still have more issues to sort out with the car before going back to try and hold that 200ftlbs out to redline. But I'm going to go with this is the least amount of power you can make with the EFR, on a dynojet this is about 230ftlbs/280hp according to the dyno guy.
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Old 06-17-2013, 06:38 PM   #2
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what the **** is that dyno
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Old 06-17-2013, 06:40 PM   #3
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Its a dynapack, I hate how they printout. Once the car is properly dialed in it will go on a dynojet for some real numbers.
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Old 06-17-2013, 06:42 PM   #4
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not even that
why does it look like it's starting at 4500 and goes to 8500? why are there 3 lines?
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Old 06-17-2013, 06:46 PM   #5
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Ignore the green one, and the short one. Short one was an aborted pull and the green one I messed upon the pull. The pulls were from 3000 to 8300. They had no idea what to set the dyno for so I went with a 3 second hold and a 10 second ramp, seemed about right.
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Old 06-17-2013, 06:48 PM   #6
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bummer dude

That's why I told you to not count your chicks before they hatch when you claimed you will hit 300whp this weekend: 1st dyno day usually ends up being a huge "diagnose all the issues" session.
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Old 06-17-2013, 06:55 PM   #7
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I'll be back once I'm really really sure the car is ready to go. Now I know for sure the tune is safe and workable. I'm still surprised how much the power drops off like a rock over 6500, even with the tubular manifold. Looking at the log, looks like boost also drops off up high, so its a 6psi wastegate that creeps up to 10psi by like 5700 then starts to drop off at around 6600 back down to like 8. Seriously the wastegate was all the way open over 4k, which is why I say this is probably the minimal power you could make on this turbo with a setup like mine.
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Old 06-17-2013, 06:57 PM   #8
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I'm sure that vtcs im isn't helping either past 6500. that's when they officially "die"
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Old 06-17-2013, 07:21 PM   #9
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Quote:
Originally Posted by 18psi View Post
bummer dude

That's why I told you to not count your chicks before they hatch when you claimed you will hit 300whp this weekend: 1st dyno day usually ends up being a huge "diagnose all the issues" session.
on my first dyno crank pulley shared as the car drove onto the rollers.
morning of the dyno a COP died as well.
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Old 06-17-2013, 07:49 PM   #10
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Winding a car on a stock intake manifold out to 8k and then being "not happy" about the massive power drop past 6800 is like hitting your dick with a hammer and being "not happy" about the resulting pain.

Your results are exactly what I'd expect to see from an EFR creeping to 10psi and then being restricted by a stock IM. What were you expecting, exactly?
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Old 06-17-2013, 08:14 PM   #11
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on my first dyno crank pulley shared as the car drove onto the rollers.
Same thing happened to me a few days after the dyno session!
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Old 06-17-2013, 08:22 PM   #12
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Quote:
Originally Posted by Leafy View Post
Once the car is properly dialed in it will go on a dynojet for some real numbers.
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Old 06-17-2013, 09:35 PM   #13
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Quote:
Originally Posted by Savington View Post
Winding a car on a stock intake manifold out to 8k and then being "not happy" about the massive power drop past 6800 is like hitting your dick with a hammer and being "not happy" about the resulting pain.

Your results are exactly what I'd expect to see from an EFR creeping to 10psi and then being restricted by a stock IM. What were you expecting, exactly?
I was expecting to not be fixing the car on the dyno, and actually spending that time tuning the car so that I wasnt running lame wastegate pressure.
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Old 06-17-2013, 10:07 PM   #14
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That's why it's a great idea to have your car fully sorted out BEFORE you go to the Dyno. That's REALLY expensive troubleshooting time. That being said....that thing should be a rocket ship when you get it running right.
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Old 06-17-2013, 10:14 PM   #15
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It feels great now. I thought I had it all sorted out, I took it out and just drove it like a normal person for 20 minutes to my buddies house and hung out for a bit, played some polish horse shoes then drove it home. And the issue of the wga arm hitting the v-band clamp I would have never caught if I wasnt on the dyno. Hitting the boost cut made the whole shop jump, I thought it was vigorous in the wrx.
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Old 06-22-2013, 03:14 PM   #16
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Leafy, you can increase boost after 6k to keep torque flat, or at least smooth it out some to increase hp.
I remember you having the EBC working so just thought I'd put that out there.
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Old 06-23-2013, 11:17 PM   #17
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Quote:
Originally Posted by Mr.Pibb View Post
Leafy, you can increase boost after 6k to keep torque flat, or at least smooth it out some to increase hp.
I remember you having the EBC working so just thought I'd put that out there.
Yeah I pulled the ebc duty down to zero for the ride to the dyno and on the dyno and I didnt have enough time to turn it back up. It will get there, the ebc is physically setup, Its just keypresses on the keyboard.
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