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Forced Induction Turbo, Supercharger, Methanol, Nitrous |
View Poll Results: Would you like to see a UEL option with FBM? | |||
Yes, UEL + FBM Turbo! | 46 | 80.70% | |
No, that sounds pointless. | 11 | 19.30% | |
Voters: 57. You may not vote on this poll |
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11-07-2013, 01:22 PM | #1 |
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UEL + Turbo
Just to poll this to see your thoughts ... who would be interested if @FullBlown had a UEL option with their turbo kits?
What would be the expected performance loss? I get mixed feedback on this ... some think with proper tuning for the UEL you would not see much of a loss. (Didn't Borla claim they got more HP out of their UEL over EL?) http://www.ft86club.com/forums/showthread.php?t=20525 |
11-07-2013, 01:30 PM | #2 |
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Burble + BoV? Yes plz
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11-07-2013, 01:36 PM | #3 | |
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11-07-2013, 03:02 PM | #4 |
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I don't see this ever happening, but it is nice to dream…I'm right there with you
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11-07-2013, 03:11 PM | #5 |
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i wouldn't agree that the performance loss is negligible. i've seen information that would suggest very much otherwise in certain cases. and the logic is sound, as i think it's pretty well universally accepted that exhaust pulse timing is crucial on turbocharges engines. if it were negligible, twin scroll turbos wouldn't offer the benefits they do.
so might you be giving up 10-15whp under the most extreme case or a few if you're not pushing it as hard, or a lot less or a lot more, no one has really done any testing to say either way on this platform. the only thing known for sure in my opinion is that it's not a plus in any case. it always detracts from performance to some degree, due to far from ideal exhaust pulse timing. |
11-07-2013, 03:22 PM | #6 |
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11-07-2013, 04:14 PM | #7 | |
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11-07-2013, 04:19 PM | #8 |
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that's na though. we're talking about turbocharged, where the effects of pulse timing are far more important as they effect spool, which of course itself greatly effects the powerband. i think we agree though that it's very application specific and whether it's a material concern is unknown. my point is just that it's never better to have uneven exhaust pulse timing in a turbo car. maybe there is some case where it is, i could be wrong, but it doesn't make any sense why that would be.
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11-07-2013, 05:33 PM | #9 | |
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11-07-2013, 06:17 PM | #10 | |
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Does anyone have some hardcore data anywhere ... for any turbo car? |
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11-07-2013, 06:34 PM | #11 | |
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Edit: Interesting R&D piece form Tomei. See below, Chapter three is about exhaust manifold design EL vs. UEL and why they chose UEL http://www.tomei-p.co.jp/news/Report-EJ25-V1.html#C3.1
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11-07-2013, 07:08 PM | #12 | |
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11-07-2013, 07:17 PM | #13 |
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If you're looking for maximum efficiency in a turbo manifold i think equalizing the pressure drop between the runners is much more important than length.
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11-07-2013, 08:21 PM | #14 | |
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