New Miata Junk 2 Intake
#262
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So Kosher salt?
He still doesn't have VVT running, so he's going to get that tuned. I don't think the basemap for the vvt really helped him so he's gonna take it to get tuned.
Troof. Thanks again for doing this.
Unsure how the stoker motor stacks up. Absolute gains will be different, but I guess relative%'s should hold up.
Unsure how the stoker motor stacks up. Absolute gains will be different, but I guess relative%'s should hold up.
#263
Now we have VTCS numbers which is nice to see. Next we'll see squaretop vs S2. Hopefully on the same engine/tune so we can see a A/B/C result.
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#264
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Thank FM, they did the turbo A/B. Motor specs, fuel, boost level,compressor type don't really matter. Just that it was F/I and not N/A. We're not looking for absolute numbers because those are meaningless. We all just want to see the difference between the S2 and an OEM manfold when it's force fed.
Now we have VTCS numbers which is nice to see. Next we'll see squaretop vs S2. Hopefully on the same engine/tune so we can see a A/B/C result.
Now we have VTCS numbers which is nice to see. Next we'll see squaretop vs S2. Hopefully on the same engine/tune so we can see a A/B/C result.
#270
Our best ever torque between 2000-5500 was with an unmodified VICS with two switching points tuned on the dyno for that engine. OEM has one switching point at 5500 IIRC. We often had trouble detuning our 2.0L race engines in PTE with the squaretop so we switched to the VICS. Nipped a bit of top end but allowed even more torque. We built a fancy 2.0L BP6D (N/A) PTE dyno classed motor in 2013 that made within 5whp of peak power from 4000-8500rpm. So yeah, the VICS is the low end torque monster of all the options. Squaretop seems to give the greatest overall power area, S2 greatest peak. With a 6psd on a road racing car with peaky powerband or Rotrex the S2 might be just the ticket.
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Last edited by emilio700; 12-15-2017 at 06:49 PM.
#273
If you can get it onto the dyno with VICS active, play do pulls all open and all closed. If you have more than one crossover point, there is power to be gained with a second switching point. This how we tune variable cams too. Bump the entire map in steps. Compare all runs. Use a combination of the values to make a full table. Run at multiple loads too, not just WOT.
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#276
Per the diagram in this post ( https://www.miataturbo.net/engine-pe...41/#post715625 ), I had always just assumed that VICS was an on / off switch and "to determine the best crossover point: do two dyno runs, one with it open and one with it closed. The point where the curves cross is where you set the change." Is that wrong? How would you find the second crossover ? Thanks.
#279