Rebuild all the salvage Miatas! ASS!
06-27-2016, 09:05 PM
#2821
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Argh freaking site killed my comment.
Intercooler is one of those chunky Precision cores. 2.5" intercooler piping all the way.
The turbo itself might be the bottleneck perhaps? It's a nice Tial vband turbine housing, though not totally sure of the AR. But the compressor housing is small -- smaller than a 2860. It actually looks the same as the 2560 compressor housings I've seen, with the same M24 markings on it. dunno if that means anything or not. But the weird part is that this same setup made 323 whp uncorrected on this same dyno in October, with WAY better spool. This graph shows 15 psi and 17 psi plots from last October:
Intercooler is one of those chunky Precision cores. 2.5" intercooler piping all the way.
The turbo itself might be the bottleneck perhaps? It's a nice Tial vband turbine housing, though not totally sure of the AR. But the compressor housing is small -- smaller than a 2860. It actually looks the same as the 2560 compressor housings I've seen, with the same M24 markings on it. dunno if that means anything or not. But the weird part is that this same setup made 323 whp uncorrected on this same dyno in October, with WAY better spool. This graph shows 15 psi and 17 psi plots from last October:
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06-27-2016, 10:30 PM
#2823
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It was 73 before, and 90 yesterday, so 17 degrees warmer yes.
I'm still just blown away at the spool difference.
Let it be said -- butt dyno reports the car is an animal. Seriously impressive the way it pulls.
I'm still just blown away at the spool difference.
Let it be said -- butt dyno reports the car is an animal. Seriously impressive the way it pulls.
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06-27-2016, 10:38 PM
#2826
SADFab Destructive Testing Engineer
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Its the same as it was last time. I figured we could play with it at another time. Because spool is easy to log on the street.
It spooled better on wastegate. So I wonder if just better EBC tuning could make a difference.
It spooled better on wastegate. So I wonder if just better EBC tuning could make a difference.
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06-27-2016, 10:41 PM
#2828
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I think I'm going to chalk up the max power difference to heat soak/higher ambient temps. The fans at the shop are pretty pathetic in terms of flow.
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06-28-2016, 01:45 AM
#2835
We stopped making power after like 220kpa. So I didn't touch the ones above.
Here is wastegate tuning.
Run 54: Baseline.
Run 55: Go to 19* at 170kpa. No power gain
Run 56: Go back down to 15*. So -2 from baseline. Power lost.
Run 57: Add 1 from 4k-5k 2 from 5k-6300, 3 from 6700 up. Power Gained
Tuning Spark ~280hp.
Run 60: DC at 35%. No timing changes.
Run 62: Add 2* timing. Slight map changes but overall no power gained. Might have lost power
We messed around with fuel a bit more. Tried playing with VVT and VICS. But couldn't really make any big changes. At this point Ed was ready to get off.
I'd like to go back with e85 and see if it was choking for air, and where we can send the timing too.
Here is wastegate tuning.
Run 54: Baseline.
Run 55: Go to 19* at 170kpa. No power gain
Run 56: Go back down to 15*. So -2 from baseline. Power lost.
Run 57: Add 1 from 4k-5k 2 from 5k-6300, 3 from 6700 up. Power Gained
Tuning Spark ~280hp.
Run 60: DC at 35%. No timing changes.
Run 62: Add 2* timing. Slight map changes but overall no power gained. Might have lost power
We messed around with fuel a bit more. Tried playing with VVT and VICS. But couldn't really make any big changes. At this point Ed was ready to get off.
I'd like to go back with e85 and see if it was choking for air, and where we can send the timing too.
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06-28-2016, 10:08 AM
#2837
Cpt. Slow
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Most of the temperature corrections are taken care of with a correction factor added in. I don't have the latest dyno files for Ed, but last time he actually made 321 with correction. Ed's turbo is spooling right in the sweet spot of VVT usefulness, so it'll make a huge difference. But if the table hasn't changed since the last dyno, I'd definitely think something's happened. Either the turbo is wearing out, engine is wearing out, or something else in the fuel/spark map is different.
I'll have to look on my laptop to see what the timing table looked like when I dyno'd it.
I'll have to look on my laptop to see what the timing table looked like when I dyno'd it.
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