Dyno Fail - Page 3 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 08-15-2012, 01:33 AM   #41
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Originally Posted by shuiend View Post
Go hit up the dynojet that Soviet dynoed on and see what you do there. I bet you do a ton better.
***** i will pay money for that. like $20

edit: also Fae fae forgot to mention that meth was leaking. I got a face full of meth during one of the pulls, it was fantastisch
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Old 08-15-2012, 01:35 AM   #42
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I found a picture of Fae at the dyno:




(compliments of google image search)
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Old 08-15-2012, 01:37 AM   #43
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also,

^ accurate chart of US external debt.
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Old 08-15-2012, 02:43 AM   #44
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***** i will pay money for that. like $20

edit: also Fae fae forgot to mention that meth was leaking. I got a face full of meth during one of the pulls, it was fantastisch
Exhaust was also leaking preturbo. Fukazoids
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Old 08-15-2012, 05:48 AM   #45
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Can you still do burnouts on like 4th gear?
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Old 08-15-2012, 09:09 AM   #46
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***** i will pay money for that. like $20

edit: also Fae fae forgot to mention that meth was leaking. I got a face full of meth during one of the pulls, it was fantastisch
N N N NO THEY'RE NOT. I DON'T THINK

And I'm not sure what the symptoms are. I'll ask my buddy. He just started going really lean all of a sudden, exactly like you. Everything else looked good iirc.
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Old 08-15-2012, 09:12 AM   #47
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A friend's SC GTO randomly started running very lean not long ago. When he'd assembled one of the fuel lines it pinched off a piece of the rubber inside the hose. Apparently it was fine for a while, but eventually broke off and clogged the line. We took the line apart and the piece of rubber just fell out of the hose and it was fixed.

It could be one of the fuel lines is clogged somewhere, with the 2 pumps that would still show full fuel pressure until it started overdrawing the one pump.
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Old 08-15-2012, 09:23 AM   #48
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with the 2 pumps that would still show full fuel pressure until it started overdrawing the one pump.
Another thing to consider (and one of the reasons why many people stay away from 2 pump setups).
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Old 08-15-2012, 11:08 AM   #49
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I believe a lean reading could also be caused by misfires. Which would mean that you're feeding the right amount of fuel after all, you're just not burning it. Any bad reading on your plugs?
With the amount of noise going on, I'm not sure if you would necessarily have been able to hear misfires on one cylinder.
BTW: Misfires kill hp too!
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Old 08-15-2012, 11:12 AM   #50
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What dyno shop is this? York Automotive?

I know Justice Racing Engines just got their dyno in recently. They are in Frederick. Probably be my stop point when the 2.0L gets up and running.

-Greer
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Old 08-15-2012, 11:16 AM   #51
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....Anyone else see the video? The car should not be spooling at 6k rpm... If the rpms were going up like a free rev it would make sense if the dyno is fail and cannot put enough load but they are not, they are going up in a slow, controlled matter. I mean there isnt much to a dyno. You strap your bitch in and you floor the hibijibies of it.
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Old 08-15-2012, 12:21 PM   #52
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Originally Posted by g_reichow View Post
What dyno shop is this? York Automotive?

I know Justice Racing Engines just got their dyno in recently. They are in Frederick. Probably be my stop point when the 2.0L gets up and running.

-Greer
yep, york automotive
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Old 08-15-2012, 12:38 PM   #53
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Looks like that QSV is doing its job... 5 psi at 5200 rpm...
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Old 08-15-2012, 01:26 PM   #54
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Get this **** fixed, son. I want to see you making 550 whp.

Jokes are fun, but there are still a lot of people who I meet who think of the miata as a "little gay car". I want a video of you dynoing 550 whp to shut them the **** up.

I would do it myself but I am missing the requisite $50k.
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Old 08-15-2012, 01:58 PM   #55
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Originally Posted by thenuge26 View Post
Get this **** fixed, son. I want to see you making 550 whp.

Jokes are fun, but there are still a lot of people who I meet who think of the miata as a "little gay car". I want a video of you dynoing 550 whp to shut them the **** up.

I would do it myself but I am missing the requisite $50k.
It's unlikely that i'll put my money where my mouth is anytime soon, but there's no way $50k is required for a 500whp BP powered Miata.

If it does, then holy **** the BP is a piece of ****.
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Old 08-15-2012, 01:58 PM   #56
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Quote:
Originally Posted by 18psi View Post
N N N NO THEY'RE NOT. I DON'T THINK

And I'm not sure what the symptoms are. I'll ask my buddy. He just started going really lean all of a sudden, exactly like you. Everything else looked good iirc.

Why do you think my math is wrong? Please tell me. This is very important to me.



Quote:
Originally Posted by pdexta View Post
It could be one of the fuel lines is clogged somewhere, with the 2 pumps that would still show full fuel pressure until it started overdrawing the one pump.
Quote:
Originally Posted by 18psi View Post
Another thing to consider (and one of the reasons why many people stay away from 2 pump setups).

When I went to 2x 044 vs. 1 pump, I actually was able to lower my injector duty by about 10%, so it did do -something-. When I put in two pumps I had dreams of 700hp but it seems like that won't happen without redoing my IC piping, my intake, and adding cams for more overall flower I mean flow.


Quote:
Originally Posted by stefanst View Post
I believe a lean reading could also be caused by misfires. Which would mean that you're feeding the right amount of fuel after all, you're just not burning it. Any bad reading on your plugs?
With the amount of noise going on, I'm not sure if you would necessarily have been able to hear misfires on one cylinder.
BTW: Misfires kill hp too!
Good idea but it was not misfiring. Misfiring has a special sound and far more obviously, when it misfires, boost falls off. Can't sustain boost on misfires, at least not 20+ psi.

Quote:
Originally Posted by triple88a View Post
....Anyone else see the video? The car should not be spooling at 6k rpm... If the rpms were going up like a free rev it would make sense if the dyno is fail and cannot put enough load but they are not, they are going up in a slow, controlled matter. I mean there isnt much to a dyno. You strap your bitch in and you floor the hibijibies of it.

Yes, the load was extra light. Way too light. In 4th, on the street, the turbo is FULLY spooled by about 6000RPM. That means at 4000RPM it's at about 10psi, 5000RPM, 25psi...


Quote:
Originally Posted by yank View Post
Looks like that QSV is doing its job... 5 psi at 5200 rpm...
Watch this video and stare at the wastegate looking arm right at the turbo. At 0:13 you see the arm move and open up the QSV. I have it set to open at around 30psi. I didn't have time to tune it before it broke. And yes, it does help.

BTW.. Y8s.. I set up my VVT to stay advanced until around 6000RPM and 20psi. This actually helped build boost much faster. I think that in general, you want to stay advanced while the turbo spools up. It spooled up much more slowly when I had it only stay advanced until 4500RPM. Different RPM break points for different sized turbos.

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Old 08-15-2012, 02:04 PM   #57
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Originally Posted by concealer404 View Post
It's unlikely that i'll put my money where my mouth is anytime soon, but there's no way $50k is required for a 500whp BP powered Miata.

If it does, then holy **** the BP is a piece of ****.


I just pulled a number out of my ***. All I know is it costs more than I can afford ATM. If I win the lottery then I am all in.

Hell, if I win the lottery I am putting one of the 3L V8 from the Ariel Atom in there AND THEN slap a turbo on there.

Because why the **** not?
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Old 08-15-2012, 02:55 PM   #58
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Quote:
Originally Posted by Faeflora View Post
BTW.. Y8s.. I set up my VVT to stay advanced until around 6000RPM and 20psi. This actually helped build boost much faster. I think that in general, you want to stay advanced while the turbo spools up. It spooled up much more slowly when I had it only stay advanced until 4500RPM. Different RPM break points for different sized turbos.
yeah i would expect you'd have to find the sweet spots for your build and motor. you've changed a lot of the flow characteristics and natural resonances of the system.

it's easy enough to do a retard run and an advance run and see what works best.
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Old 08-15-2012, 03:02 PM   #59
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Quote:
Originally Posted by concealer404 View Post
It's unlikely that i'll put my money where my mouth is anytime soon, but there's no way $50k is required for a 500whp BP powered Miata.

If it does, then holy **** the BP is a piece of ****.
It is. If you do everything twice. Realistically, it can probably be done for around $8-$12,000. Note that LS swap is like $15,000 and you won't break your drivetrain every second.
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Old 08-15-2012, 03:21 PM   #60
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can we get the 2 threads merged?

I mean we have the SAME EXACT convo going on in both and its confusing as hell
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