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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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Old 11-11-2013, 08:41 AM   #43
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Originally Posted by FR-S Matt View Post
After reading Drift Office's dyno of the JDL UEL, I really don't think it's mattering as much as people think it is. I think a lot goes into the design of a proper UEL and collector. I'm just not sure we've truly seen a "well designed" EL (cough Nameless) yet besides the HKS. Even then, the gap between both is very small after looking at the data. It sounds like the EL would be the preferred method, but I'm sure 98% of people will not see that massive difference.
But comparing UEL to EL on an N/A car is not the same as comparing them on a turbo car, as the exhaust pulses are used to spin the turbo and make power.

I would love to see for example a JDL or FA20club kit dynoed back to back with their respectives UEL and EL. that would be the ultimate test.

Last edited by Sportsguy83; 11-11-2013 at 08:57 AM.
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Old 11-11-2013, 11:58 AM   #44
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The differences on a turbo car would be more pronounced, I'd think, than on a NA car. That the dispute in turbo-land has been looking almost identical to this one since 2002 tells me that no real major differences have been found. The exception is the big power builds... They almost all go to elh. But that's the only real concensus I've seen as an observer.

So, those asking for how much you'd leave on the table, there really is no answer. Not even in turbo-land. Which tells me that except for big power builds, there is no real measurable difference.

Now, if you want to run a twin-scroll turbo, you need elh b/c of the exhaust pulses, and twin turbos need elh for the same reason. But if you're NA, super-charged, or single scroll single turbo, then it doesn't matter.

You're going to see more gains from a more efficient header design that allows better exhaust flow (such as mandrel bends, no flex fittings, etc) than whether it's elh or uel. As such, pick which one gives you the exhaust sound you like.

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Old 11-11-2013, 12:18 PM   #45
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Originally Posted by SirBrass View Post
The differences on a turbo car would be more pronounced, I'd think, than on a NA car. That the dispute in turbo-land has been looking almost identical to this one since 2002 tells me that no real major differences have been found. The exception is the big power builds... They almost all go to elh. But that's the only real concensus I've seen as an observer.

So, those asking for how much you'd leave on the table, there really is no answer. Not even in turbo-land. Which tells me that except for big power builds, there is no real measurable difference.

Now, if you want to run a twin-scroll turbo, you need elh b/c of the exhaust pulses, and twin turbos need elh for the same reason. But if you're NA, super-charged, or single scroll single turbo, then it doesn't matter.

You're going to see more gains from a more efficient header design that allows better exhaust flow (such as mandrel bends, no flex fittings, etc) than whether it's elh or uel. As such, pick which one gives you the exhaust sound you like.

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I am not trying to argue your statement, for all I know you might be 100% correct, but my problem is I like data and this argument is falling in the land of every single other forum. Its all hearsay and no numbers.

I wish I had the resources to do a back to back comparison, but still hold hope that someone will actually test it. EL Dyno tune, back to back with UEL Dyno tune, same car.

That would really put all arguments to rest.
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Old 11-11-2013, 02:01 PM   #46
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Thing is, there's not really (from what I've seen... I might not have seen enough) much numbers at this lower performance level.

If there are numbers, the technical subforms over at IWSTI should have them (much more focused and mature in this area than NASIOC). The WRX/STI crowd has had over a decade more to argue the differences than the 86 crowd has, but it's still being debated, and it's not a done deal like the other common (and I wish would just die) question of "which BOV should I get as my first upgrade?"... answer is "None! Your system is recirc, not vent to atmosphere!").
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Old 11-11-2013, 06:15 PM   #47
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Originally Posted by Sportsguy83 View Post
I am not trying to argue your statement, for all I know you might be 100% correct, but my problem is I like data and this argument is falling in the land of every single other forum. Its all hearsay and no numbers.

I wish I had the resources to do a back to back comparison, but still hold hope that someone will actually test it. EL Dyno tune, back to back with UEL Dyno tune, same car.

That would really put all arguments to rest.
build me a uel header that'll work with my kit and i'll pay for the dyno time
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Old 11-13-2013, 12:24 PM   #48
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wow, I was gone for 3 days and this is what happens?? @Sportsguy83
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Old 11-13-2013, 12:30 PM   #49
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wow, I was gone for 3 days and this is what happens?? @Sportsguy83
LOLOL yes.. And that does not count the back and forth argument I had with this for a few days but did not post it here. Finally hammered down and decided to go EL and f*ck it.
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Old 11-13-2013, 02:28 PM   #50
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Originally Posted by Sportsguy83 View Post
LOLOL yes.. And that does not count the back and forth argument I had with this for a few days but did not post it here. Finally hammered down and decided to go EL and f*ck it.
You made the right decision.
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Old 11-13-2013, 09:22 PM   #51
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personally I say UEL, just as someone stated its the reason why different exhaust exist for the car.
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Old 11-14-2013, 12:01 PM   #52
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UEL is very good for the low and mid revs torque.

UEL is a bit less efficient at top RPM.

The sounds is so much different between both.

Very nice comparaison video with the black Impreza WRX in this thread. Well done.

Myself I prefer the rumble sounds by far. It is a more distinctive sounds for our boxer engine. Sounds more agressive to me also.

EL Headers sound like all regular 4 cylinders cars. Nothing special there.
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