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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


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Old 07-17-2019, 06:17 PM   #225
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Originally Posted by CSG Mike View Post
Ace A350 header vs JDL 4-2-1. Green = stock, Orange = Ace A350, Blue = JDL 4-2-1. 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.



Long story short, the JDL makes the same peak area under the curve from 6500-7400, which is important if you're shifting at redline and want maximum acceleration.

The A350 has a vastly larger midrange powerband.

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


Very illuminating, thanks for sharing Mike! Looks like the JDL can keep up with the A350 in the dip zone, at least from 3400 to 4000 rpm, but above that, the A350 is still the king of the hill until you hit the top end.

The ACE is an amazing product without a doubt, but for the price to my door in Canada, I’m still happy with the JDL from a bang-for-buck perspective.

EDIT: As @CSG Mike has stated in another thread, the dyno comparison is actually against the JDL 4-1 EL header, not the 4-2-1 EL header.
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Old 07-17-2019, 06:49 PM   #226
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shit its not even really close. i guess its the same on e85 too
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Old 07-17-2019, 06:57 PM   #227
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Very illuminating, thanks for sharing Mike! Looks like the JDL can keep up with the A350 in the dip zone, at least from 3400 to 4000 rpm, but above that, the A350 is still the king of the hill until you hit the top end.

The ACE is an amazing product without a doubt, but for the price to my door in Canada, I’m still happy with the JDL from a bang-for-buck perspective.
The dip that particular Ace graph is an anomaly. See the graphs under for how they normally look. Not sure why the dip is there on that pull; may have been wheel slip on the dyno or something.
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Old 07-18-2019, 11:40 PM   #228
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I just finished with install of JDL 4-2-1 (black ceramic) and ACE overpipe, both from CSG (thank you!), on a 2013 BRZ. Paired with stock front pipe and milltek resonated sport catback. Tuned by Delicious (fun meeting/talking with Bill) at Mann Engineering (always gracious hosts).

I had no fitment issues, no locations where the header is making contact. Feels and sounds great.
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Old 07-19-2019, 10:17 AM   #229
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These are the same results posted in the other thread of a JDL 4-1 header correct? NOT the 4-2-1.
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Old 07-19-2019, 09:12 PM   #230
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I just finished with install of JDL 4-2-1 (black ceramic) and ACE overpipe, both from CSG (thank you!), on a 2013 BRZ. Paired with stock front pipe and milltek resonated sport catback. Tuned by Delicious (fun meeting/talking with Bill) at Mann Engineering (always gracious hosts).

I had no fitment issues, no locations where the header is making contact. Feels and sounds great.
That's awesome. I am going to install mine this weekend. Also got it with black coating, but using a Tomei overpipe, stock front pipe, and Nameless muffled track pipe. Just gonna be doing the email/e-tuning from Delicious Tuning. Were you stock before?
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Old 07-20-2019, 04:45 PM   #231
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Yes, stock before.
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Old 07-25-2019, 12:10 PM   #232
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Useless comparison and misinformation.

Trying to sell parts?
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Old 07-25-2019, 12:20 PM   #233
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I know it's an outdated and discontinued header, but I'm considering swapping my Nameless Performance/ Cosworth headers for these sometime early next year. Any idea how this could compare to it?
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Old 07-25-2019, 01:00 PM   #234
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Why would you? Nameless/Cossworth's also is very good header performing very good. Some drawbacks might be it not filling well torque dip and bad clearance in front of engine, but it did well regarding overall gains/area under curve. Imho there is very little to gain switching one catless header to another, bad price/performancy wise purchase decision.
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Old 07-25-2019, 01:01 PM   #235
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Why would you? Nameless/Cossworth's also is very good header performing very good. Some drawbacks might be it not filling well torque dip and bad clearance in front of engine, but it did well regarding overall gains/area under curve. Imho there is very little to gain switching one catless header to another, bad price/performancy wise purchase decision.
It's just a thought is all.
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Old 07-25-2019, 07:14 PM   #236
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I installed my 4-2-1 about a week ago. They went it very smoothly. There was no interference anywhere. In fact the 4-2-1 fit better than the JDL UEL header they replaced. Power wise they have a smoother torque cure than the UEL but I shouldn't really comment as I am just on the Delicious base map. Once the tune is finalised I'll have some better driving feel comparisons.
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Old 07-25-2019, 07:20 PM   #237
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Quote:
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I know it's an outdated and discontinued header, but I'm considering swapping my Nameless Performance/ Cosworth headers for these sometime early next year. Any idea how this could compare to it?
I doubt anyone will really be able to compare. If you want to update then see how much you can sell the Nameless headers for to offset the cost of the new headers and tune. Also keep in mind the Nameless headers have a 3" output while the JDLs have a 2.5" so you may need to change your over pipe setup to suit.
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Old 07-25-2019, 07:27 PM   #238
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I doubt anyone will really be able to compare. If you want to update then see how much you can sell the Nameless headers for to offset the cost of the new headers and tune. Also keep in mind the Nameless headers have a 3" output while the JDLs have a 2.5" so you may need to change your over pipe setup to suit.
I have a 2.5" overpipe so that will stay.
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