GT2560 against GT2860RS - Miata Turbo Forum - Boost cars, acquire cats.

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Old 05-10-2013, 07:24 AM   #1
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Default GT2560 against GT2860RS



Red for gt2860rs, blue for gt2560. Running 17psi.
1.6 NA with 2000 nb8 engine swap. Adaptronic, 3" exhaust with no cat. Cam sprocket with supertech valve spring. Wiseco 8.5, eagle rods, FM manifold. 850cc injectors. Blitz electronic boost controller.

Would anyone know why my top end is dipping despite turbo holding boost till the end? Manifold? Cams? I played with the sprocket but didn't made much difference.
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GT2560 against GT2860RS-20130510_132117_zps9ab7bd8a.jpg   GT2560 against GT2860RS-20130510_132117_zps9ab7bd8a.jpg  

Last edited by nismo502; 05-10-2013 at 02:46 PM.
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Old 05-10-2013, 08:18 AM   #2
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Turn your picture around...
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Old 05-10-2013, 09:22 AM   #3
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Dip should be intake manifold/throttle. Time for honda/64mm.
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Old 05-10-2013, 10:27 AM   #4
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At those rpms I think cams also come into play with the power dropping off.
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Old 05-10-2013, 10:30 AM   #5
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Quote:
Originally Posted by Amellrotts View Post
At those rpms I think cams also come into play with the power dropping off.
Wtf. Cams come into play at all RPMs. Duh. Change your manifold first.

You come on, ask a question that can be found with a search, and then correct the answer. Just search.
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Old 05-10-2013, 11:58 AM   #6
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What a/r exhaust housing is your 28060RS?
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Old 05-10-2013, 12:58 PM   #7
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Quote:
Originally Posted by JasonC SBB View Post
What a/r exhaust housing is your 28060RS?
0.86
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Old 06-04-2013, 03:04 PM   #8
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Nice, too bad it's on a 1.6. I ran an 2560 on a log manifold and will soon be running a 2860RS .86 on an AbsurdFlow, I think spool diff will be limited based on Hustler's previous achievements.
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Old 06-08-2013, 01:40 AM   #9
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^He says he's got a 2000 NA8 in it
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Old 06-08-2013, 01:48 AM   #10
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Quote:
Originally Posted by Nagase View Post
Wtf. Cams come into play at all RPMs. Duh.
wat.
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Old 06-08-2013, 01:59 AM   #11
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IM/TB, and the FM log probably aren't helping.
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Old 06-10-2013, 09:49 AM   #12
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2860RS doesnt fair well above 1bar.

2871R graph would look like your 2860 graph but have the power hold steady. i didnt notice any difference in spool from a 2860 to 2871.
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Old 06-10-2013, 03:17 PM   #13
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That's not true at all, sorry.

There are numerous plots showing the 2860rs holding over 300 all the way to redline with no power dips. Its most definitely good for that much. Past 300 the 2871r starts shining of course, but up to that point I'd take the 60rs
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Old 04-24-2014, 08:22 PM   #14
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Since nismo502 didn't include torque in lb-ft I calculated the points based on HP and RPM and graphed them along with the HP.



Dark Blue 2560 Torque Light Blue 2560 HP Dark Red 2860 Torque Light Red 2860 HP

Keith
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Old 04-24-2014, 08:45 PM   #15
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AFR plot? Spark map?

Upload and that can help clear the picture
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Old 04-24-2014, 09:20 PM   #16
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Are you really running it to 8000 rpm on the dyno or is there a miscalculation?
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