02-26-2018, 09:04 PM | #1 |
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BMW 340i DYNO RESULTS JB+, CATLESS DOWNPIPE ETC.
Had my car dynoed today over at EAS in Anaheim and made some nice power. over 400 WHEEL TORQUE!!. Graph attached.
JB+, Burger Intake, VRSF Catless Downpipe, Resonators Deleted, Akrapovic rear section muffler. The numbers: Baseline - 321 hp 353 tq First pass - 375 hp 396 tq second pass - 377 hp 402 tq |
02-26-2018, 09:20 PM | #2 |
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Bimmerpost won't let me upload images for some reason... so here is a link to a picture of the dyno graph. as well as link to the video of a pull on the dyno
links: https://photos.app.goo.gl/G4yJeMfETD8crlUT2 Last edited by lci_340i; 02-26-2018 at 09:38 PM.. |
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02-27-2018, 08:20 AM | #3 |
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Those are solid number for a jb+ considering that the catless downpipe on the new b58 motor doesn't add any power (confirm par Terry at BMS) Baseline TQ seems a bit high for a stock car though.. Anyway the fact is the gain, 55WHP and 49WTQ is great!!
Enjoy the ride now!
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02-27-2018, 11:13 AM | #5 |
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02-27-2018, 11:14 AM | #6 | |
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02-27-2018, 06:28 PM | #7 |
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02-27-2018, 06:37 PM | #8 |
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02-27-2018, 10:30 PM | #9 |
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It sounds like your supporting mods make a difference as when I did a dyno with just the jb+ it only added power up to about 4 or 5 k rpm
after that it barely made any additional power over stock. everything else being equal does it imply the stock systems airflow is causing a bottleneck? |
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02-28-2018, 09:43 AM | #10 | |
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02-28-2018, 03:31 PM | #11 | |
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Because my car is on a lease, i was thinking about going jb4 only (already have the MPPSK on my 340i) and i've ordered with Mike the Agency Power intake. Maybe thinking about a catted downpipe (highflow). dont want any code.
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02-28-2018, 05:42 PM | #12 | |
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You might get a code even with catted downpipes. Get the Jb4 and call it a day
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02-28-2018, 06:47 PM | #13 | ||
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02-28-2018, 06:51 PM | #14 |
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Thousands of miles on the CG DS-1 and no code. Just gains (:
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2022 CT4-V Blackwing 6-speed
SOLD: 2016 340i xDrive 6-speed DAW v2.5 turbo E40 | Dorch S2 | VRSF DP | MST intake | AWE catback | 335is clutch | CSF heat exchanger | RK Autowerks intake manifold | Orange M Perf Brake Kit | KW Street Comfort coilovers | GTS taillights V2 |
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02-28-2018, 07:03 PM | #15 |
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Do you have stock exhaust or aftermarket one? Which one? And how is the sound? Any throttle closure problem?
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02-28-2018, 07:06 PM | #16 |
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Look at my sig for my mods. I'm running AWE catback. DP + catback = LOUD AF. The cold start is brutal, but you can drive it not obnoxiously if you keep it under 2.5k RPMs. I don't run a tune nor do I log so I can't comment. You'll most likely need the additional wires to help control the WGDC with the FUA setting in JB4.
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SOLD: 2016 340i xDrive 6-speed DAW v2.5 turbo E40 | Dorch S2 | VRSF DP | MST intake | AWE catback | 335is clutch | CSF heat exchanger | RK Autowerks intake manifold | Orange M Perf Brake Kit | KW Street Comfort coilovers | GTS taillights V2 |
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02-28-2018, 08:32 PM | #17 |
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Still waiting to see proofs of said gains with the DP on B58. Been waiting for quite some time actually.
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02-28-2018, 08:34 PM | #18 | |
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I, for one, will try it and log some runs with it as soon as my summer rubbers are on. At least two more weeks to go...
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02-28-2018, 08:47 PM | #19 | |
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02-28-2018, 09:31 PM | #20 |
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To be fair, I'm not running any tunes. I dyno'd, and wouldn't have achieved the numbers I did without the downpipe. Obviously I could'be just went the JB4 route and have forgone the DP, but still.
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03-01-2018, 02:29 AM | #21 | |
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Great post by the OP. I'm thinking of going JB4 only with a downpipe and nothing else. I think that should be on the upper limit before you get throttle closure. |
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