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Old 02-13-2015, 06:27 PM   #561
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yessssssssssssssssssssssss


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Old 02-13-2015, 06:30 PM   #562
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Glorious!
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Old 02-13-2015, 06:37 PM   #563
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Quote:
Originally Posted by EO2K View Post
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
But with an NB the 60psi base pressure turns into 34psi differential pressure at 26psi of boost. Guessing theres a manifold referenced fpr in there. Or he's secretly corkey bell.
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Old 02-13-2015, 06:39 PM   #564
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Awesome
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Old 02-13-2015, 06:44 PM   #565
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Quote:
Originally Posted by Leafy View Post
But with an NB the 60psi base pressure turns into 34psi differential pressure at 26psi of boost. Guessing theres a manifold referenced fpr in there. Or he's secretly corkey bell.


This was at 22-23PSI from glancing at the gauge. I will have to check the log to get the exact amount of boost. I have a Walbro 255HP fuel pump and FIC 650cc injectors.
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Old 02-13-2015, 07:02 PM   #566
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Quote:
Originally Posted by 99mx5 View Post


This was at 22-23PSI from glancing at the gauge. I will have to check the log to get the exact amount of boost. I have a Walbro 255HP fuel pump and FIC 650cc injectors.
Is the rest of the fuel system stock, or boost referenced AFPR?
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Old 02-13-2015, 07:16 PM   #567
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The rest of the fuel system is stock.

I just found this video online.

click to play

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Old 02-13-2015, 07:43 PM   #568
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Dear lord
Quote:
Originally Posted by 99mx5 View Post
The rest of the fuel system is stock.
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; 02-13-2015 at 07:55 PM.
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Old 02-13-2015, 07:48 PM   #569
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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?
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Old 02-13-2015, 08:06 PM   #570
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Nicely done! Congrats.
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Old 02-13-2015, 09:13 PM   #571
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Quote:
Originally Posted by Jeffbucc View Post
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?
I have the stock timing wheel. I wanted to use the OEM 36-1 toothed wheel, but I don't have a spare cam gear to cut the intake sensor triggers.
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Old 02-15-2015, 03:31 AM   #572
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Here is the graph produced by the BW Matchbot based on the RPM and PSI converted from kPa to PSI from the log.



Edit: Corrected graph
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99mx5 EFR build-133339d1424071892-99mx5-efr-build-6258.jpg  
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File Type: msl 375whp dyno pull 2.13.2015.msl (65.9 KB, 40 views)

Last edited by 99mx5; 02-16-2015 at 02:40 AM.
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Old 02-15-2015, 04:30 AM   #573
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Wait, what's up with the slow spool?

And why are you getting 250*F coolant temps?!??!

TPS is also reading 114% max, time to calibrate.
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Old 02-15-2015, 11:33 AM   #574
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He's at elevation
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Old 02-15-2015, 11:39 AM   #575
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Quote:
Originally Posted by 18psi View Post
He's at elevation
Like, 4,000ft worth of it. I can't wait to see what mine does at sea level

Ari, props for making the plot. Also, did you hit the drop down to change the turbo and see where the plot landed on a 6758?
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Old 02-15-2015, 01:29 PM   #576
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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 99mx5 EFR build

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; 02-16-2015 at 02:49 AM. Reason: Incorrect values
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Old 02-15-2015, 01:43 PM   #577
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Old 02-15-2015, 03:34 PM   #578
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congrats, good job!
I'm pretty jelly, coudn't imagine what 375 whp are
also:subbed
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Old 02-15-2015, 03:59 PM   #579
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Glad to know that you can run off of the compressor map on those EFR's and not have a drastic dip in the flow! Excited!
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Old 02-16-2015, 01:49 AM   #580
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Quote:
Originally Posted by 99mx5 View Post
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:

2000 - 50.1 - 7.26
3000 - 110.5 - 16.02
4000 - 165 - 23.93
5000 - 221.5 - 32.12
6000 - 233.6 - 33.88
7000 - 220 - 31.90
The kPa values from the log are absolute pressure numbers, not boost.

So, 110 = 0.1bar = 1.4psi, 220 = 1.2bar = 17.4psi, etc.
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