New Miata Junk 2 Intake
#161
I question the power gains under 4500rpm strongly. It looks like the stock-turbo chart goes to WOT much later. Starts at 50wtq, clearly not at WOT, then a quick ramp up to WOT and 125wtq at 3100rpm, and then takes more time to build up to full boost. The Skunk2 run was clearly started much earlier and built boost earlier as a result.
For the time being, everyone else can just examine the dyne graph from 3500RPM and up until I get some clarification
#162
And here it is. I'll go back and edit the other post to ignore everything shy of 3500rpm. It does give us a good glimpse past that though
I asked: "I have a question. Just posted this in the thread on miataturbo and someone said it looks like in the old dyne graph, the operator opened the throttle later than in the new one, which would now show a huge increase below 4000rpm over stock. They said it looks like in the old run someone didn't fully open the throttle until that "dip" around 3100. True? Otherwise I can't see how it picked up 50+ torques at 2500rpm with just the manifold and TB"
Original poster: " ya that spike at 3100ish is where the throttle was stabbed on that run. We had tried opening it up at different rpms and that was the best run of the night."
I asked: "I have a question. Just posted this in the thread on miataturbo and someone said it looks like in the old dyne graph, the operator opened the throttle later than in the new one, which would now show a huge increase below 4000rpm over stock. They said it looks like in the old run someone didn't fully open the throttle until that "dip" around 3100. True? Otherwise I can't see how it picked up 50+ torques at 2500rpm with just the manifold and TB"
Original poster: " ya that spike at 3100ish is where the throttle was stabbed on that run. We had tried opening it up at different rpms and that was the best run of the night."
#163
I'm not sure you can draw a conclusion without seeing datalogs with a MAP or boost trace for each pull. If you start a 3rd gear pull at 3000rpm, and the wastegate cracks slightly, it's not unreasonable at all to expect to wait until ~4500rpm for full boost. If that's the case, there are zeo gains under 4500rpm.
#165
This was my run. I added points from a run when the throttle was opened earlier to where it became even with the dotted lines for a better comparison.
We didn't change any of the wastegate settings so the boost level should be the same for both runs. Was 12 psi tapering down to 10 by the end.
We didn't change any of the wastegate settings so the boost level should be the same for both runs. Was 12 psi tapering down to 10 by the end.
#167
Yea looks much smoother and theres only one spot around 4600 where the power dips below its old. I'm just holding out for that square top comparison, I have one that I would need to port to match the Skunk 2 TB anyway so if the Skunk mani is going to be significantly better, I won't bother molesting my square top and just sell it. I'm definitely rooting for this thing to do better
#173
Also no mention of what correction factor/run conditions.
At first blush, many of us can see the manifold appears to be right in photos. But I like data.
I will reserve judgement until I either see or conduct something resembling a controlled test. Our manifold has not shown up yet.
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#174
The plot shown does not represent what a VICS is capable of in terms of peak or area. That is my point.
Also no mention of what correction factor/run conditions.
At first blush, many of us can see the manifold appears to be right in photos. But I like data.
I will reserve judgement until I either see or conduct something resembling a controlled test. Our manifold has not shown up yet.
Also no mention of what correction factor/run conditions.
At first blush, many of us can see the manifold appears to be right in photos. But I like data.
I will reserve judgement until I either see or conduct something resembling a controlled test. Our manifold has not shown up yet.
Maybe yours hasnt shown up yet because they know youre going to test it, lol. THEY SKURRED
#175
We ordered a second manifold so we can do ab A/B on Bullet too. That's a TSE EFR6258 kit on a blueprinted/forged NB1 longblock on corn.
The first one will go on Taxi, that's an 11.0:1 2.0L with medium large cams, +2 CNC head, blah blah. That's the engine that we made 167whp on pump gas and stock ECU (JDM + crystal mod) with AFPR.
Would be nice to hit 185whp on corn. Our previous best with milder cams and square top on race gas was 182whp with a 2.0L NB2 and +1 hand ported head.
The first one will go on Taxi, that's an 11.0:1 2.0L with medium large cams, +2 CNC head, blah blah. That's the engine that we made 167whp on pump gas and stock ECU (JDM + crystal mod) with AFPR.
Would be nice to hit 185whp on corn. Our previous best with milder cams and square top on race gas was 182whp with a 2.0L NB2 and +1 hand ported head.
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#176
Well we need to wait until there's more data, but at least we can say this won't be a flop.
In my eyes, part of the sales comes from the simplicity of it. For someone who's swapping engines (Example VVT in an NA chassis), this eliminates any worry about dealing with VCTS or VICS flaps. In addition, it is already tapped for different ports you might need. Seems to make a decent sales pitch even if it doesn't make gobs more power, but we'll wait to see.
In my eyes, part of the sales comes from the simplicity of it. For someone who's swapping engines (Example VVT in an NA chassis), this eliminates any worry about dealing with VCTS or VICS flaps. In addition, it is already tapped for different ports you might need. Seems to make a decent sales pitch even if it doesn't make gobs more power, but we'll wait to see.
#178
We ordered a second manifold so we can do ab A/B on Bullet too. That's a TSE EFR6258 kit on a blueprinted/forged NB1 longblock on corn.
The first one will go on Taxi, that's an 11.0:1 2.0L with medium large cams, +2 CNC head, blah blah. That's the engine that we made 167whp on pump gas and stock ECU (JDM + crystal mod) with AFPR.
Would be nice to hit 185whp on corn. Our previous best with milder cams and square top on race gas was 182whp with a 2.0L NB2 and +1 hand ported head.
The first one will go on Taxi, that's an 11.0:1 2.0L with medium large cams, +2 CNC head, blah blah. That's the engine that we made 167whp on pump gas and stock ECU (JDM + crystal mod) with AFPR.
Would be nice to hit 185whp on corn. Our previous best with milder cams and square top on race gas was 182whp with a 2.0L NB2 and +1 hand ported head.
On a turbo engine I'd expect to see similar changes except at a lower level of development. The manifold will flow more air so it removes a restriction point if the valves and exhaust aren't the bottleneck.