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NEW > Redesigned Equal Length Headers
NEW > Redesigned Equal Length Headers
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NEW > Redesigned Equal Length Headers
NEW > Redesigned Equal Length Headers
NEW > Redesigned Equal Length Headers
NEW > Redesigned Equal Length Headers
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Old 12-14-16, 12:55 PM   #31
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Default Re: NEW > Redesigned Equal Length Headers

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Originally Posted by Perrin_Thomas View Post
....We have changed the design 4 times scene 2003/2004, each time improving exhaust flow,HP and material used.
That sounded good AND it would sound MUCH better if you can quantify the improvement. For example, 20% increase in exhaust velocity or something like that. You must have data like this if you are using modern design methodologies such as simulations etc so why not share them instead of making a generalized statement.
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Old 12-14-16, 01:29 PM   #32
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Default Re: NEW > Redesigned Equal Length Headers

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Originally Posted by lowbee View Post
That sounded good AND it would sound MUCH better if you can quantify the improvement. For example, 20% increase in exhaust velocity or something like that. You must have data like this if you are using modern design methodologies such as simulations etc so why not share them instead of making a generalized statement.
Okay so i do have a dyno graph showing the difference between the old header and the new one, we try not to put this up because it can confuse a lot of customers. Cause the new one just becomes the normal one.

If you can give me a day or so i will get you the graph.
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Old 12-16-16, 03:26 PM   #33
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Default Re: NEW > Redesigned Equal Length Headers

Here are some Dyno graphs for you, the only difference is swapping the old PERRIN header to the new one, You can see a slight increase in power and spool.





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Old 12-16-16, 04:01 PM   #34
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Default Re: NEW > Redesigned Equal Length Headers

Thanks for these dyno graphs Thomas. I like the spool of the E4, looks like the E4 spool a whole 400rpm quicker reaching 20 psi at 3100 rpm.

My eyes could be playing tricks on me but it looks like the E4 has less peak torque @ 3300rpm than its older version (probably need a re-tune) but that is less important to me than having a quicker spool and a higher top end HP @ 5100 rpm. I also like that the E4 is making ~10 lb-ft more torque at 2200 rpm

The E4 looks good enough for me so I will just get one now
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Old 12-21-16, 09:28 AM   #35
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Default Re: NEW > Redesigned Equal Length Headers

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Originally Posted by lowbee View Post
Thanks for these dyno graphs Thomas. I like the spool of the E4, looks like the E4 spool a whole 400rpm quicker reaching 20 psi at 3100 rpm.

My eyes could be playing tricks on me but it looks like the E4 has less peak torque @ 3300rpm than its older version (probably need a re-tune) but that is less important to me than having a quicker spool and a higher top end HP @ 5100 rpm. I also like that the E4 is making ~10 lb-ft more torque at 2200 rpm

The E4 looks good enough for me so I will just get one now
Awesome! you will not be disappointed,

Yes it does, The boost right there is slightly higher on that run which makes the the spike of torque, but yes if we were to re-tune it that would go away. And this graph was just a average run, there where many over pulls that had better results.
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Old 12-21-16, 09:59 AM   #36
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Default Re: NEW > Redesigned Equal Length Headers

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Awesome! you will not be disappointed......
Can you post pictures of the collectors of the two versions (E4 and older) or
post pictures of whatever distinguishing features between the 2 versions ?

I want to be able to point to these pictures and make sure my supplier knows to send me the "right" E4 version. Thanks
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Old 12-21-16, 12:28 PM   #37
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Default Re: NEW > Redesigned Equal Length Headers

here you go!
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