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Borgwarner EFR 9280 Dyno

Old 06-23-19, 12:13 PM
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Borgwarner EFR 9280 Dyno


Turblown cast ewg 9280 1.05 FD Rx7 Dyno


Half bridge, pump gas with methanol at 18 psi. Full 3.5 exhaust. Our full cast ewg 9280 turbo kit. This dyno is BHP, not RWHP. Built and tuned in Ireland by Shadow Rotary.

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Old 06-23-19, 01:08 PM
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Weird looking curve. Did they let out at the top end? I thought the 9280 curve would hold better in the upper rpms.
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Old 06-23-19, 03:02 PM
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Originally Posted by Narfle View Post
Weird looking curve. Did they let out at the top end? I thought the 9280 curve would hold better in the upper rpms.
Likely the manifold design choking out, but yeah, this looks like doctored a bit...
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Old 06-23-19, 03:35 PM
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Originally Posted by Narfle View Post
Weird looking curve. Did they let out at the top end? I thought the 9280 curve would hold better in the upper rpms.
In my experience its usually the port work. I have a back to back dyno showing what the difference in a large change in port work does to the powerband( zero other changes). I will have to dig it up.
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Old 06-23-19, 07:22 PM
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Originally Posted by Turblown View Post
In my experience its usually the port work. I have a back to back dyno showing what the difference in a large change in port work does to the powerband( zero other changes). I will have to dig it up.
Strange dyno using flywheel equations from a chassis dyno, what's that-530 rwhp? At nearly 20 psi? It would be truth telling to see what the previous model EFR 9180 made on this same dyno and same ports, etc. Because the 9180 probably comes close to that at the same 19 psi. Turned up it's said the the 9280(110 lbs per mn) is an 830rwhp (rotary) turbo.
Maybe not, or definitely not if this shop did everything correctly with the set up. I'm hoping they didn't.

That half bridge looks like it takes away from how soon the EFR should see full boost, and the dyno sure sounded like it too. Big power drop at the end also as was said. I expected more power at that boost level since there was a 9180 dyno sheet posted up reading 570 rwhp @ just 3 psi more.

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Old 06-24-19, 08:37 AM
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Originally Posted by zx1441 View Post
Strange dyno using flywheel equations from a chassis dyno, what's that-530 rwhp? At nearly 20 psi? It would be truth telling to see what the previous model EFR 9180 made on this same dyno and same ports, etc. Because the 9180 probably comes close to that at the same 19 psi. Turned up it's said the the 9280(110 lbs per mn) is an 830rwhp (rotary) turbo.
Maybe not, or definitely not if this shop did everything correctly with the set up. I'm hoping they didn't.

That half bridge looks like it takes away from how soon the EFR should see full boost, and the dyno sure sounded like it too. Big power drop at the end also as was said. I expected more power at that boost level since there was a 9180 dyno sheet posted up reading 570 rwhp @ just 3 psi more.
Most dynos in the UK and surrounding region report their HP figures this way. I haven't seen any other dynos from this shop, so I cannot make any comments on the rest. I am street tuning a 9280 cast kit maybe this week, and have a few more too do. I've also sold quite a few of these turbo kits, so soon or later there will be more dyno data.
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Old 06-24-19, 08:44 AM
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"its usually the port work"

you can tell lots about the ports by locating peak torque. peak torque is the rpm point of MAX CYLINDER FILL. aggressive porting moves this point higher on the rpm band. on this particular run peak torque is at 6290. i would have thought a half bridge would have moved P T to a higher RPM. my highly engineered raceports are around 6450 without the lower rpm penalty of a bridgeport. nevertheless 6290 isn't a bad number.

what does stand out is it appears that full boost, in this case a hair above 18, doesn't arrive till just after 6000 rpm? many factors could effect this, such as the wastegate control so perhaps this just isn't maximized.

i may have missed it but i don't see if this is corrected. i did see humidity temp and pressure so maybe it is... and maybe not. not very professional to not disclose... also it is relevant (16 hp if corrected, who knows what if not) to the tune as to which type of correction is used.

then there is the lack of data to at least 8500-9000. i attribute this to some other factor not relating to the turbo.

just to be very clear on one central point... if you are wanting a 9280 you are looking for 800 SAE rrwhp... given it is close to impossible to hook up 600 in the real world (given a 2960 curb weight) you are looking to replace the entire drivetrain and set some serious records. nothing wrong w that as long as you understand the challenge.

i will take the 9180 as a more rational irrational option.

Last edited by Howard Coleman CPR; 06-24-19 at 10:17 AM.
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