So, I didn't measure them before cutting to check if they were equal, however with the modified runners, 2&3 are 30" and 1&4 are 28". What is you opinion on the variance? When I make the 2-1 runners, I will likely have one runner shorter than the other by a couple inches. The existing 2-1 runners were about 5' - is there any benefit in trying to extend that length if possible?
I'm not sure how I can get those equal length - I don't have enough space to run the legs out further & put bends to add length. I read on a forum that for 4cyl 2-1 runners should be as short as possible , is that accurate in your experience?Is that the possibility to compensate a part of the 50 mm difference of 2-3 and 1-4?
This looks like it’s going to sound pretty cool 😎Header is mostly assembled at this point. Next I need to rework the entire exhaust around it. I would like to keep a cat in the system, so I will probably have to do a whole extra loop to the right side & back again
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I have to accept whatever penalty in flow the uneven lengths will cause - just no way to route it otherwise.
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Runner for 2-3 into the 2-1 collector is 3"(!) longer than the other.
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A little rumble never hurt 😅uneven lengths will create a different engine sound. It is a common OEM concept for “sporty” i4 engines to make one of the primaries longer or shorter than the others to create higher harmonics for a more sporty sound. You might get some Subaru/VW Boxer engine sound traits from this.
uneven lengths will create a different engine sound. It is a common OEM concept for “sporty” i4 engines to make one of the primaries longer or shorter than the others to create higher harmonics for a more sporty sound. You might get some Subaru/VW Boxer engine sound traits from this.
Thanks for the input - I am looking forward to hearing how it sounds across the rpm range, for sure! Even if it is compromised somewhat, it has to been far, far better than my old shorty header for performance.This looks like it’s going to sound pretty cool 😎
Nice solution to get the header you wanted in there 👍 back to the dyno soon ?lower
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Pretty sure I'm good now. All will be cleaned up & painted after welding
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The header has to be pivoted thus to remove/install. So, the body support has to be a removable section no matter what
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Next year - I don't drive the car in the winter - tires are way to soft for below 50f. It's gonna be at least 2 weeks or more before I get the exhaust welded (waiting for mandrel bends and muffler), and weld the chassis. After that, I also have to figure out a revised cross brace, and fabricate/weld/paint all that, so at least a month or more all told before it's even ready to drive.Nice solution to get the header you wanted in there 👍 back to the dyno soon ?