99mx5 EFR build
He may actually be limited by injector size. IIRC he and I are on the same 650cc injectors. Take that 375hp with a BSFC of .60 and .80 DC on 4 injectors and you are looking at required 743cc worth of fuel. The 60psi base pressure in the NB puts him at 763.39cc for actual injector size. So if you believe the RC calculator, its completely feasible that he did in fact run out of injector.
The numbers listed are optimal, obviously not taking into account plumbing losses and such. I'd have to dig through the thread and figure out if he went boost reference on the FPR or if he stuck with the stock system, because that will have a significant effect on things as well.
Either way, 375 is absolutely nothing to sneeze at
The numbers listed are optimal, obviously not taking into account plumbing losses and such. I'd have to dig through the thread and figure out if he went boost reference on the FPR or if he stuck with the stock system, because that will have a significant effect on things as well.
Either way, 375 is absolutely nothing to sneeze at
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Dear lord 
So what you are saying is... I don't need to worry about setting up a return and a referenced FPR? I'm running the same FIC 650 injectors and a 255LPH pump (DW200 in my case.) This will simplify my fuel system quite a bit.
Also, I know you said Magnaflow muffler and resonator, do you happen to have PNs around somewhere? That thing sounds amazing
So what you are saying is... I don't need to worry about setting up a return and a referenced FPR? I'm running the same FIC 650 injectors and a 255LPH pump (DW200 in my case.) This will simplify my fuel system quite a bit.
Also, I know you said Magnaflow muffler and resonator, do you happen to have PNs around somewhere? That thing sounds amazing
Last edited by EO2K; Feb 13, 2015 at 07:55 PM.
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Joined: Oct 2013
Posts: 2,764
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From: Cedar City, UT
Damn son. I'm getting really excited to get mine on the dyno once everything is in place.
Anyone care to explain to me why power jumps so sharply at 4200 rpm? I'm guessing peak boost being held by the EBC?
What timing wheel do you have? Maybe timing jumping around also holding you back?
Anyone care to explain to me why power jumps so sharply at 4200 rpm? I'm guessing peak boost being held by the EBC?
What timing wheel do you have? Maybe timing jumping around also holding you back?
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Thread Starter
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Posts: 1,656
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From: Las Cruces, NM
Damn son. I'm getting really excited to get mine on the dyno once everything is in place.
Anyone care to explain to me why power jumps so sharply at 4200 rpm? I'm guessing peak boost being held by the EBC?
What timing wheel do you have? Maybe timing jumping around also holding you back?
Anyone care to explain to me why power jumps so sharply at 4200 rpm? I'm guessing peak boost being held by the EBC?
What timing wheel do you have? Maybe timing jumping around also holding you back?
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Also, did you hit the drop down to change the turbo and see where the plot landed on a 6758?
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Thread Starter
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iTrader: (16)
Joined: Oct 2006
Posts: 1,656
Total Cats: 526
From: Las Cruces, NM
I found that I could "stretch" the graph in megalog viewer to get more exact values. The RPM - kPa - PSI values from the log are as follows:
EDIT: THESE VALUES WERE INCORRECT. SEE POST #581 FOR UPDATED GRAPHS https://www.miataturbo.net/build-thr...0/#post1206424
Red is the incorrect value. Apologies for the error.
2000 - 50.1 - 7.26 -7.43
3000 - 110.5 - 16.02 1.33
4000 - 165 - 23.93 9.24
5000 - 221.5 - 32.12 17.43
6000 - 233.6 - 33.88 19.18
7000 - 220 - 31.90 17.21
EDIT: THESE VALUES WERE INCORRECT. SEE POST #581 FOR UPDATED GRAPHS https://www.miataturbo.net/build-thr...0/#post1206424
Red is the incorrect value. Apologies for the error.
2000 - 50.1 - 7.26 -7.43
3000 - 110.5 - 16.02 1.33
4000 - 165 - 23.93 9.24
5000 - 221.5 - 32.12 17.43
6000 - 233.6 - 33.88 19.18
7000 - 220 - 31.90 17.21
Last edited by 99mx5; Feb 16, 2015 at 02:49 AM. Reason: Incorrect values
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So, 110 = 0.1bar = 1.4psi, 220 = 1.2bar = 17.4psi, etc.
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