Pat's Ebay Turbo Compound Boost Build
#382
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Gotcha, makes sense.
As for afr, e85 can still be kept at 12 unlike pump where you'd want to fatten it up with serious boost.
looks like it dips quite a bit past 7, lean it back out, you'll gain more IDC and pick up power.
that power should be good for 130mph trap speeds, and put a hurting on most street cars that are not tx2k cars
As for afr, e85 can still be kept at 12 unlike pump where you'd want to fatten it up with serious boost.
looks like it dips quite a bit past 7, lean it back out, you'll gain more IDC and pick up power.
that power should be good for 130mph trap speeds, and put a hurting on most street cars that are not tx2k cars
Will pull some fuel and add some boost tomorrow.
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But yes if you stand on the pedal in high gears it spools and makes torque down low too. I posted a 5th gear dyno here but it's not a full to 8K one.
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On this part, just to elaborate, my goal is to get the power as high as possible while keeping the torque down for transmission reliability. Hoping to make 500whp and be able to shift at 8,500, fall to 6,000-6,500 and only have 350tq or so there. Basically the fastest it can be with a 6 speed and reliable.
But yes if you stand on the pedal in high gears it spools and makes torque down low too. I posted a 5th gear dyno here but it's not a full to 8K one.
But yes if you stand on the pedal in high gears it spools and makes torque down low too. I posted a 5th gear dyno here but it's not a full to 8K one.
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Pretty much. Going to put a MBC on the little turbo next (it's a 2871, I checked) and then turn it up some since I think keeping them at equal boost is best. But eventually will do ebc on big turbo for torque line if I can't do it without ebc.
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These are with a misfire. I think I need to gap down the plugs. Still, running strong! And fuel needs work too...
Out of fuel at this point, pretty sure it probably needs more timing or better tuning/could make more power. 37 PSI boost. I think I can find a bit more power by lowering the front turbo's boost and upping the rear turbos boost as they aren't balanced right now. Still, for a budget turbo setup this thing is stupid fast!
5th gear, had to stop RPMs after this, it fell on its face.
![](https://www.miataturbo.net/attachments/build-threads-57/163055-pats-ebay-turbo-compound-boost-build-5th_zpsup7re6kq.jpg?dateline=1456024142)
3rd gear, no misfire or not much/not noticeable.
![](https://www.miataturbo.net/attachments/build-threads-57/163056-pats-ebay-turbo-compound-boost-build-more%2520than%2520all%2520of%2520it_zpstwodjbgq.jpg?dateline=1456024142)
Still, 492whp VD in 3rd is bananas! No doubt it's over 500whp on a 5th gear pull.
Out of fuel at this point, pretty sure it probably needs more timing or better tuning/could make more power. 37 PSI boost. I think I can find a bit more power by lowering the front turbo's boost and upping the rear turbos boost as they aren't balanced right now. Still, for a budget turbo setup this thing is stupid fast!
5th gear, had to stop RPMs after this, it fell on its face.
![](https://www.miataturbo.net/attachments/build-threads-57/163055-pats-ebay-turbo-compound-boost-build-5th_zpsup7re6kq.jpg?dateline=1456024142)
3rd gear, no misfire or not much/not noticeable.
![](https://www.miataturbo.net/attachments/build-threads-57/163056-pats-ebay-turbo-compound-boost-build-more%2520than%2520all%2520of%2520it_zpstwodjbgq.jpg?dateline=1456024142)
Still, 492whp VD in 3rd is bananas! No doubt it's over 500whp on a 5th gear pull.
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Thanks! It's 9:1 compression FM pistons, about 17 degrees of advance at 36 PSI.