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05-18-2009, 12:53 PM | #26 |
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What about just a cross over pipe instead of getting a header at all.
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05-18-2009, 04:28 PM | #27 |
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^gains will probably be negligible.
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05-18-2009, 04:50 PM | #28 |
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My MadDad equal length headers made way more power than the stock headers.
It spooled faster and made more power EVERYWHERE especially in the tq and midrange. And the headers were the ONLY change. Both setups were Topspeed tuned. |
05-18-2009, 08:02 PM | #29 |
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Thanks CoolRex I was hoping somebody would respond with some good info.
Last edited by TechMJ; 05-18-2009 at 11:16 PM. |
05-19-2009, 05:22 AM | #30 |
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nice numbers!
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05-25-2009, 04:16 AM | #31 |
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7hp is WAY more power? Am I reading the chart wrong?
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05-25-2009, 09:56 AM | #32 |
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The cool boxer rumble everyone is refering to is the product of a poorly designed exhaust system for a turbo car . or a na car for that matter . spacing the exhaust pulses equally not only creates a more efficent exhaust flow but the pulses are evenly spaced so when they come in contact with the turbine wheel its a smooth efficent rate of flow and thus a better way to have the exhaust run on any car . remember evenly spaced pulses also scavenge the combustion cylinder better and thus give a better response and more HP & TQ everywhere . not to mention the engine just runs smoother
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05-25-2009, 10:21 AM | #33 |
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thats only comparing the difference at peak, theres a difference throughout the entire power band, in some areas more than others. more often than not mods pre turbo usually sacrifice bottom end for top end, or vice versa, in different ratios, but this is an improvement over all. therefore, further proving that equal is way more efficient in every area to unequal
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05-25-2009, 10:30 AM | #34 |
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05-27-2009, 12:35 AM | #35 |
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how do you spool faster. It looks like it hits harder but way later. the stock seems to spool way quicker according to your chart.
anybody know the difference between MaddogEL, Tomei, and Perrin? I am about to die deciding which header to get. Might even keep stock and just port them and coat. I want to have quicker spool if possible than stock on vfseries turbo. Last edited by JASWRX; 05-27-2009 at 01:28 AM. |
05-27-2009, 08:19 AM | #36 | |
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Quote:
The Tomei has the widest inner diameter uppipe of the three...I can tell you that much. More of a true EL design than @ least Perrin (not sure about the other one), comes with header wrap, and hasn't cracked in 13Kish miles and one nasty winter. Just saying. |
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05-27-2009, 01:03 PM | #37 |
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maybe I'm just old, but back in the good old days, the good headers where EL and the cheap ones where not. my thinking is choosing mods that make the most HP. to me the "boxer rumble" sounds like a misfire.
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05-27-2009, 01:07 PM | #38 |
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Every older guy around here that has messed with cars used to always tell me my car was misfiring back when I was still on the stock headers .
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05-27-2009, 01:28 PM | #39 | |
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boxter rumble comes from the firing order. i have an equil length and have the rumble. |
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05-27-2009, 01:28 PM | #40 |
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05-27-2009, 01:30 PM | #41 | |
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In UEL headers the pulses are all staggered out hence the burble. In EL headers the pulses are all in line and in sequence. Think blowing a fan steady vs blow in hesitant pulses. |
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05-27-2009, 03:53 PM | #42 |
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I still do not see how you say you spool faster?
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05-27-2009, 03:55 PM | #43 |
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05-28-2009, 05:01 PM | #44 |
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does anybody have maddad's number. I have emailed them but have not heard back. I want to find out more about the EL header.
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05-28-2009, 05:41 PM | #45 |
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I see a good gain around 5K-5.5K
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05-28-2009, 06:15 PM | #46 |
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Drive an equal length header around town in your daily driving manner, and one without the EL...... the ndrive around town with the stock.... You'll notice the difference. Off boost response is much improved. Don't just look at WOT.
You should ask Big Al (Dynoflash) why he changed to equal lengths....at least that's what it sounds like during his 704whp pull..... I could be wrong. ....yes I am wrong... he uses twinscroll setup!!! Best of BOTH!!! Last edited by FuJi K; 05-28-2009 at 06:21 PM. |
05-29-2009, 02:57 AM | #47 |
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so you are saying off boost and below full torque, the Equal Length is much more drivable and feels more torque down low?
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05-29-2009, 07:51 AM | #48 |
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Yes definately. But you also have to use a good setup. I liked the maddad's because the 1.6" piping. That's bigger than stock. The only downside is that you have to heat them up to get full power but header wrapping them solves that issue. Mine are ceramic coated but when I put the built 2.5L I will be header wrapping them.
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05-29-2009, 08:30 AM | #49 |
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You honestly don't see how the light red line (after header torque) goes up on the chart before the light blue line (before header torque)? REALLY?!?!?! This indicates he's producing quite a bit more power earlier in the powerband. On a turbocharged car, that usually means it's spooling faster (torque has to come from somewhere).
Here's the graph one more time... If you don't see that, you either need to: A: get your eyes checked B: Hit yourself in the face with a hammer and give up |
05-29-2009, 09:16 AM | #50 |
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^^^^Yes.
It's not insane faster spool but it's faster spool nontheless. Instead of a smooth pull back now the car literally snaps and plants your head back. Also note that simply slapping headers on won't help much....I actually lost power because the AFR went from 11.0:1 to 10.2:1 in the upper rpms. But tuning for the headers made all the difference. |
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