Dyno Fail
08-15-2012, 08:12 AM
#47
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.
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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08-15-2012, 10:08 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!
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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08-15-2012, 10:16 AM
#51
....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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08-15-2012, 12:26 PM
#54
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.
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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08-15-2012, 12:58 PM
#55
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.
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.
If it does, then holy **** the BP is a piece of ****.
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08-15-2012, 12:58 PM
#56
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Why do you think my math is wrong? Please tell me. This is very important to me.
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.
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!
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!
....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...
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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08-15-2012, 01:04 PM
#57
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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08-15-2012, 01:55 PM
#58
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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.
it's easy enough to do a retard run and an advance run and see what works best.
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08-15-2012, 02:02 PM
#59
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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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