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Stock Port, Pump Gas, Borgwarner EFR 8474 Dyno

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Old 11-16-20 | 09:52 AM
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Stock Port, Pump Gas, Borgwarner EFR 8474 Dyno

Some solid EFR 8474 Dyno Results from HPAcademy

Specs; Used stock port REW, CJM S1 fuel system, Walbro 460LPH fuel pump, ID1350X primaries, ID1750X secondaries, stock intake manifolds/TB, Adaptronic M6000, Vinny Fab Vmount, IGN1a coils, our cast EFR 8474 1.05 turbo system with turbine housing/manifold inconel shields, Pump gas at 14.5 psi




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neit_jnf (11-16-20)
Old 11-16-20 | 11:34 AM
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without watching the video, did they feather the throttle? boost curve seems laggy. Great results nonetheless!
Old 11-16-20 | 12:07 PM
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Originally Posted by neit_jnf
without watching the video, did they feather the throttle? boost curve seems laggy. Great results nonetheless!
Depends on the ramp rate, according to the videos it makes 14.5 psi by 3700RPMS with the boost controller on, about 3900rpms with just spring pressure.
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Old 11-16-20 | 07:15 PM
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HP Academy knows what they are doing. I was subscribed to their paid program for a while and I learned some good stuff. I was a moderator on their private forum for a while.
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Old 11-17-20 | 01:20 AM
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I paid for the universal membership.

Work life has taken a few turns over the last few years but in a well paid steady job now, should have the opportunity to put all the HPA stuff into practice with the addition of a Plex combustion logger over the next year or so. Will only be starting with a 35r and basic pre-turbo WI but hoping to step up one of the turblown quickspool turbine housings on a big EFR down the track. Firearms have absorbed a fair bit of play money in the mean time.
Old 11-17-20 | 08:44 AM
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Originally Posted by Slides
I paid for the universal membership.

Work life has taken a few turns over the last few years but in a well paid steady job now, should have the opportunity to put all the HPA stuff into practice with the addition of a Plex combustion logger over the next year or so. Will only be starting with a 35r and basic pre-turbo WI but hoping to step up one of the turblown quickspool turbine housings on a big EFR down the track. Firearms have absorbed a fair bit of play money in the mean time.
Are you buying a Plex analyzer? I've never used theirs, but I've used much more expensive commercial analyzers.
Old 11-17-20 | 10:21 AM
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Originally Posted by Slides
I paid for the universal membership.

Work life has taken a few turns over the last few years but in a well paid steady job now, should have the opportunity to put all the HPA stuff into practice with the addition of a Plex combustion logger over the next year or so. Will only be starting with a 35r and basic pre-turbo WI but hoping to step up one of the turblown quickspool turbine housings on a big EFR down the track. Firearms have absorbed a fair bit of play money in the mean time.
HPA is also going to be doing a video on our new variable a/r housing!
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Old 11-18-20 | 05:46 AM
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Have the Plex in the cupboard.

They did a TeamViewer session with me before purchase, the software is pretty good, the tfx stuff worked out to be a similar price for a much less powerful and flexible product. The Plex is pretty much a chassis and combustion logger in one. Would be cool if an ECU manufacturer set up can for auto tune.
Old 11-19-20 | 03:50 PM
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Originally Posted by neit_jnf
without watching the video, did they feather the throttle? boost curve seems laggy. Great results nonetheless!
5:40 and then 13:44 for the WG position/boost control addition
HPA free video
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Last edited by Turblown; 11-19-20 at 04:00 PM.
Old 12-11-20 | 11:48 AM
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Now that I've reviewed the logs, it made the 420rwhp at only 14 psi( 14.2 psi was a peak early on).

I can see why it made 420rwhp at such low boost on this style of dyno, emap was less than 1:1 ( seen below).

That;'s probably 460rwhp on a dynojet FYI.

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Old 12-31-20 | 06:15 PM
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is under 1:1 emap not typical for this turbo. do stock ports create less emap?
Old 01-02-21 | 05:17 AM
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From: on the rev limiter
the dyno in the opening post only indicates 11-12 psig then with it not getting up towards 14 psig until after 5000 rpm so I can see why it was questioned as being “laggy” in a previous post.

otherwise it’s sitting at the lower end of the compressor’s highest efficiency island at peak and you could argue giving up response and torque down low to achieve that; which again, the dyno graph in the opening post seems to indicate, but certainly safe and reliable there for sure.

so maybe that wasn’t the best of the dyno graphs those stated numbers are coming from, because something isn’t matching there.
.
Old 01-02-21 | 11:30 AM
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Originally Posted by TeamRX8
the dyno in the opening post only indicates 11-12 psig then with it not getting up towards 14 psig until after 5000 rpm so I can see why it was questioned as being “laggy” in a previous post.

otherwise it’s sitting at the lower end of the compressor’s highest efficiency island at peak and you could argue giving up response and torque down low to achieve that; which again, the dyno graph in the opening post seems to indicate, but certainly safe and reliable there for sure.

so maybe that wasn’t the best of the dyno graphs those stated numbers are coming from, because something isn’t matching there.
.
I believe the first post's dyno sheet was without the boost controller on. The car with the controller on made 14 psi by 3800rpm range. Its covered in one of the videos.

Our EWG kits are 600 rpms slower than IWG for those wondering( runner length, volume, and the .92 vs 1.05), also the 8474 is 250/300rpms slower than the 8374. The 8474 has a 68mm inducer vs the 62mm on the 8374.
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Old 01-04-21 | 10:52 PM
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From: on the rev limiter
that makes sense, thanks for taking the time to explain it.

I watched the videos, but they were sort of all over the place discussing multiple things and do I likely just overlooked it there.
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Old 06-03-21 | 12:30 AM
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Originally Posted by Turblown
HPA is also going to be doing a video on our new variable a/r housing!
Did they ever make the video? I can't find anything about it being used, other than it exists
Old 06-03-21 | 05:46 PM
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From: on the rev limiter
see link below; in short, if there’s something to trumpet about they won’t be shy to blow on it loud and clear 🎺

https://www.rx7club.com/rotary-car-p.../#post12469861
.
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KNONFS (06-04-21)
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