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EFR 8374 Results, Large streetport- 93 pump & no AI

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Old 10-09-17, 12:27 PM
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EFR 8374 Results, Large streetport- 93 pump & no AI

I posted these in my build thread but wanted to post them here as well because this turbo is gaining popularity and while there are several dyno sheets posted they are hard to find or not pump gas only.

Here are the sheets from the my power tune which was done by John Renna @ IR Performance.
High Boost:


Low Boost:


Mods aren't crazy as I wanted a turnkey car that was on the more reliable side with no worries about an AI system. The car is a beast to me as it is now with room for improvement if I want to change some things up in the future.

The build was done at IRP and short details are as follows:
IRP Stage 3 Large streetport
RX Parts Apex Seals
IRP EFR 8374 single turbo kit
IRP Fuel System with 725/2000CC injectors
Sakebomb IGN-1A ignition
Power FC EMS
Resonated mid-pipe and RB dual tip
Custom v-mount IC

Boost was controlled with the PFC and factory solenoid in the EFR and gas was 93 Octane pump.

More info can be found in my thread in the 3rd gen builds section.

Last edited by Molotovman; 10-10-17 at 09:19 PM.
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Old 10-10-17, 10:08 AM
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Very nice. 8374 seems like the way to go.
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Old 10-10-17, 10:12 AM
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Before even looking at the charts I just want to say thank you for uploading them in high resolution. And I hope you didn't use Photobucket.
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Old 10-10-17, 11:19 AM
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Originally Posted by cib24 View Post
Before even looking at the charts I just want to say thank you for uploading them in high resolution. And I hope you didn't use Photobucket.
They're high resolution scans to full page .jpeg's of the printed sheets, they shouldn't go anywhere too, I used the forum image uploader.
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Old 10-10-17, 11:54 AM
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Nice job man! Love the setup.
I'm sure it's a blast to drive.
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Old 10-10-17, 02:24 PM
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What was the AFR at peak boost? it's showing 12.9 AFR as the lowest reading in the bottom of the chart. Is the AFR reading off?
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Old 10-10-17, 02:39 PM
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Man that EFR sure is nice turbo
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Old 10-10-17, 07:05 PM
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Originally Posted by zooq View Post
What was the AFR at peak boost? it's showing 12.9 AFR as the lowest reading in the bottom of the chart. Is the AFR reading off?
AFR at peak is in the 10's, I assume that #2 AFR is the tailpipe sniffer reference.
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Old 10-10-17, 08:37 PM
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Here's mine.

IRP Stage 3 engine
IRP Chromoly studs
EFR 8374 Turblown kit
Blitz FMIC
2x 850 ID
4x2000 ID
Haltech PS2000
Xcessive LIM
Walbro 450
IGN-1A
3" full exhaust
Dual tip RB


No AI when tuned @ 15 PSI, 92 Octane
AFR @10
forgot to take off rev limiter @ 7500
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Old 10-11-17, 09:27 AM
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Originally Posted by darksereniti View Post


Here's mine.

IRP Stage 3 engine
IRP Chromoly studs
EFR 8374 Turblown kit
Blitz FMIC
2x 850 ID
4x2000 ID
Haltech PS2000
Xcessive LIM
Walbro 450
IGN-1A
3" full exhaust
Dual tip RB


No AI when tuned @ 15 PSI, 92 Octane
AFR @10
forgot to take off rev limiter @ 7500
It's interesting that the power and torque curves are so different, primarily the torque. Does anyone have insight besides the difference in dyno type?
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Old 10-11-17, 11:52 AM
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Originally Posted by Molotovman View Post
It's interesting that the power and torque curves are so different, primarily the torque. Does anyone have insight besides the difference in dyno type?

There is no boost trace on the plot, but based on the torque curve it seems like boost is building much slower on this graph. Aside from the low RPM area below 4000 RPM, the graphs don't look all that different. Peak torque is right around 5600-5700 RPM on both with both making just over 350 ft/lbs.
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Old 10-11-17, 11:53 AM
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Maybe the difference in LIM and exhaust....
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Old 10-11-17, 12:05 PM
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Honestly the difference is probably starting RPM. Are you really gunning it at 2k rpm in 4th gear?
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Old 10-11-17, 12:49 PM
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My tuner said he was late hitting the button. I am assuming the start button to log the dyno.

I am schedule for E85 flex tune this Saturday. I will ask him more info about my dyno graph.
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Old 10-11-17, 12:59 PM
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Looking good IAN, car must be a blast!!!

Any plans on adding AI?
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Old 10-12-17, 08:35 AM
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Originally Posted by KNONFS View Post
Looking good IAN, car must be a blast!!!

Any plans on adding AI?
My setup will be almost exactly the same except with AI. Car is at IRP getting rebuild, so I will post some results in the spring when all is done!
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Old 10-12-17, 09:14 AM
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Looks great guys. Ian it was a pleasure doing the build for you and thank you for posting the results. The response of these turbos along with a solid build and tune is insane. Over a bar of boost by 3000rpm and over 400whp consistently on pump gas. Plus Mustang dynos tend to read 12-15% lower than a Dynojet. The car is a blast to drive on the street. Delivery is quick and linear, making for a more usable powerband. We tune to 10.7-11.0 AFR depending on setup under boost using a dedicated wideband. My dyno has 2 additional AFR sensors that can be placed where desired. AFR1 wasn't being used during these pulls. AFR2 was in the tailpipe, which tends to be a point leaner than the actual reading at the motor. The scale isn't shown on the dyno plot above. The 12.8 is around 2000rpm where we started and the 19.5 is full lean after we let off. 12.3 was the overall average.

Last edited by IRPerformance; 10-12-17 at 09:34 AM.
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Old 10-12-17, 09:54 AM
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Originally Posted by darksereniti View Post


Here's mine.

IRP Stage 3 engine
IRP Chromoly studs
EFR 8374 Turblown kit
Blitz FMIC
2x 850 ID
4x2000 ID
Haltech PS2000
Xcessive LIM
Walbro 450
IGN-1A
3" full exhaust
Dual tip RB


No AI when tuned @ 15 PSI, 92 Octane
AFR @10
forgot to take off rev limiter @ 7500
Do you have a boost plot?
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Old 10-12-17, 10:47 AM
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Originally Posted by IRPerformance View Post
Looks great guys. Ian it was a pleasure doing the build for you and thank you for posting the results. The response of these turbos along with a solid build and tune is insane. Over a bar of boost by 3000rpm and over 400whp consistently on pump gas. Plus Mustang dynos tend to read 12-15% lower than a Dynojet. The car is a blast to drive on the street. Delivery is quick and linear, making for a more usable powerband. We tune to 10.7-11.0 AFR depending on setup under boost using a dedicated wideband. My dyno has 2 additional AFR sensors that can be placed where desired. AFR1 wasn't being used during these pulls. AFR2 was in the tailpipe, which tends to be a point leaner than the actual reading at the motor. The scale isn't shown on the dyno plot above. The 12.8 is around 2000rpm where we started and the 19.5 is full lean after we let off. 12.3 was the overall average.
Great! This is what I want for my build
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Old 10-12-17, 04:31 PM
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Originally Posted by darksereniti View Post
My tuner said he was late hitting the button. I am assuming the start button to log the dyno.

I am schedule for E85 flex tune this Saturday. I will ask him more info about my dyno graph.
Cool, I can't wait to see the graph. I bet you can hit 500 on E85.

Originally Posted by KNONFS View Post
Looking good IAN, car must be a blast!!!

Any plans on adding AI?
Thanks, Elio. No plans for AI in the near future, the car can use some bushings and other replacement upgrades in the short term. I didn't see you signed up for the cruise, I'm bummed I can't make this Sunday, last or next would have been good for me. We need a good local meet!
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