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Mazworx Prototype VE NA Header

Thread: Mazworx Prototype VE NA Header

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Posts: 11-20 of 113
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2009-11-05 17:42:50
#11
Originally Posted by mazworxsales
Unless Im looking at the wrong post on the "other forum" 80% of them all have 3"


Yes but the 3" collector is after a 2 1/4 choke then a transition or megaphone with a reverse cone on the end
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2009-11-05 17:46:18
#12
Is that a stock cross member? I believe the cross members are different on diff sr cars, so you might have clearance problems with the cross member on other cars.
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2009-11-05 18:32:27
#13
Great looking start. I still have my ASP 4-2-1 in my bedroom, but I like they way this looks. Subscribed for more details....
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2009-11-05 18:46:29
#14
Good to see new more header's available for the N/A guys!
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2009-11-05 18:58:50
#15
YAY!

Another option.

Well done guys, can't wait to see how these go.
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2009-11-05 19:01:11
#16
Was this collector made "in house" or was it purchased from somewhere else. If its not a big deal could you please tell us where it was purchased from?
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2009-11-05 19:06:49
#17
looks sweet ... it looks like everyone is getting a hand in the header game lol
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2009-11-05 19:45:25
#18
Originally Posted by Pr
looks sweet ... it looks like everyone is getting a hand in the header game lol


at this rate the cost a one a these 4-1 headers will be the cost of a ssac header

good stuff.....
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2009-11-05 20:31:25
#19
Originally Posted by BenFenner
They may have 3" outlets, but there should be a "choke" point in the collector right after the pipes merge. They should merge to a pipe similar in diameter to one of the runners. If your runners are 2" before the collector then the collector should choke down to 2" (many designs choke down to 2.25" instead with slightly better results I think). Without this choke zone, the low pressure created in the adjacent pipe(s) is much less as the exhaust pulse looses velocity too early (in the collector) before it can create a vacuum in the other pipes.

Also, it may look like a restriction, but the choke zone is actually the same size or bigger than the runner and remember only one pulse is entering the collector at a time so it's no restriction at all.

Please don't think I'm talking down to you, I'm just trying to make a very complicated nuance of N/A header design sound simple. And if you prefer not to take this advice, I'm sure we wouldn't hold it against you if you have something to back up your decision. I'm sure we'd love to see two prototypes pitted against each other on your dyno.


We appreciate the input. Our collector chokes down to 2.25" ID from the 1.51" ID primary. And then opens to 3". I've never seen a collector that the choke point is equal to the primary.
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2009-11-05 20:36:04
#20
Originally Posted by BenFenner
They may have 3" outlets, but there should be a "choke" point in the collector right after the pipes merge. They should merge to a pipe similar in diameter to one of the runners. If your runners are 2" before the collector then the collector should choke down to 2" (many designs choke down to 2.25" instead with slightly better results I think). Without this choke zone, the low pressure created in the adjacent pipe(s) is much less as the exhaust pulse looses velocity too early (in the collector) before it can create a vacuum in the other pipes.

Also, it may look like a restriction, but the choke zone is actually the same size or bigger than the runner and remember only one pulse is entering the collector at a time so it's no restriction at all.

Please don't think I'm talking down to you, I'm just trying to make a very complicated nuance of N/A header design sound simple. And if you prefer not to take this advice, I'm sure we wouldn't hold it against you if you have something to back up your decision. I'm sure we'd love to see two prototypes pitted against each other on your dyno.


BenFenner, please stay out of it. You are messing it up for everybody with an NA VE.

We all know how you are an expert with VE cams and headers, based on previous discussion about them.

Don't forget everybody, this is just a prototype.
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