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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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07-17-2019, 06:05 PM | #1 |
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JDL 4-1 dyno results
Ace A350 header vs JDL 4-to-1. Green = stock, Orange = Ace A350, Blue = JDL 4-to-1. All dynos on ACN91.
The "dip" on the Ace header in this graph is an anomaly. Here's a full set of Ace dynos to verify. The JDL 4-1 completely obliterates the torque dip. Long story short, the JDL makes the same peak area under the curve as the Ace from 6500-7400, which is important if you're shifting at redline and want maximum acceleration. If you want maximum bang for your buck for top end power, go with the JDL 4-1. The A350 has a vastly larger midrange powerband, yielding larger overall gains area under the curve, but comes at a premium price. If you want the best powerband available NA, go with the Ace A350. Both headers are engine limited up top, rather than flow limited. For FI results with a supercharger, see this thread, that compares a Ace A350 vs Gruppe-S header, both on a JRSC + HBP + Ethanol. The Gruppe-S header is on a straight E85 tune, whereas the Ace A350 is on a Flex tune with E70. Straight E85 tunes will always make more power than a Flex tune. http://www.ft86club.com/forums/showp...postcount=5027 CSG has packages available for both the JDL 4-1 and Ace A350 4-2-1 headers that include tunes. *edit* Been informed this is the 4-1 header. Post corrected. Last edited by CSG Mike; 07-18-2019 at 06:21 PM. |
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07-17-2019, 11:10 PM | #2 |
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Finally some data I've been waiting for. It's good to see the JDL 4-2-1 against the ACE and a stock tune. I have a set of the JDL 4-2-1's with a black coating sitting behind me in my room waiting for me to put them on. They still seem to be pretty awesome and its great to see that it destroys the torque dip! Just sucks that the gains aren't as good as I hoped for. Makes me wonder if I shoulda busted the extra $500 for the ace headers. :s honestly seems similar to a cheap UEL set up...but like almost twice the price for the jdl's. RIP
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07-18-2019, 07:32 AM | #3 | |
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Quote:
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07-18-2019, 09:37 AM | #4 | |
Good Job Subaru!
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JDL 4-2-1 dyno results
Thanks for sharing this in a separate thread for visibility Mike.
For everyone’s reference, below are my results on my car plus findings and musings, posted previously: Quote:
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07-18-2019, 10:23 AM | #5 | |
Good Job Subaru!
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Quote:
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07-18-2019, 12:20 PM | #6 |
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07-18-2019, 02:24 PM | #7 |
Good Job Subaru!
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I'll take the data points from the photo with some software I have and re-plot it later. Tried to best fit the curves with paint but the scaling of hp/torque on the two graphs didn't want to play ball.
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07-18-2019, 03:18 PM | #8 |
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What is the stock car being used here?
Edit: MY16 or 17+? |
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07-18-2019, 04:04 PM | #9 |
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07-18-2019, 04:13 PM | #10 |
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MT 2017 has less dip?
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07-18-2019, 06:37 PM | #11 |
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Post has been corrected.
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07-18-2019, 07:29 PM | #12 |
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Oh this is JDLs old 4-1 not the new 4-2-1 header.
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07-18-2019, 07:54 PM | #13 |
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How does each header compare when they have been tuned to suit the individual headers flow?
Without letting the engine management system know what it can do with the different flow characteristics of the different designs, surely the results would be compromised. From previous experience, without a individual tune to suit, none of the headers tested would be giving their full potential. Thanks for your time doing the testing.
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07-18-2019, 09:49 PM | #14 |
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Oh wait is it? The original JDL 4-1 and not the recently JDL 4-2-1 EL header? The other thread mike claims its the 4-2-1 http://www.ft86club.com/forums/showt...130248&page=17 maybe a typo?
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