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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 07-05-2012, 03:37 PM   #21
E30m3ochoa
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Originally Posted by aggieE46 View Post
They're not equal length.

A lot of people think that. I sent them to Burns to analyze when they built the Y-pipes for us. He said that equal length is good, but really hard to do at times. On these headers, the average length of the primaries works out almost perfectly.

They're just great headers. Made a ton of power and torque.

Swain coated to significantly reduce engine bay temps.

And they're rare! I'm actually surprised they haven't sold by now.
Oh i see, so what would be the price for them?
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Old 07-05-2012, 03:48 PM   #22
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Oh i see, so what would be the price for them?
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Old 07-05-2012, 03:54 PM   #23
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I know what you mean by you feel a harder pull when easing.on the throttle rather than flooring it. ive noticed it on my 04 325xi 5mt... I think its normal to be honest.
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Old 07-05-2012, 09:47 PM   #24
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damm wish i had swain coated tecnik headers. that baller. its like buying rep ebay headers vs. active autowerk headers. even though techniks make more power
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Old 07-06-2012, 01:56 PM   #25
jared_wiesner
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Unless you have an old automatic that you are trying to force to kickdown by slamming the throttle, you will get better power delivery by easing the throttle on. This allows the engines sensors and fuel delivery system to cope with the extra demands instead of have to choke down a burst of low vacuum/extra air. It becomes very pronounced when you do it from a stop and car bogs before picking up speed.
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Old 07-09-2012, 12:01 AM   #26
E30m3ochoa
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So this happens to only old automatic trannys or also old manual trannys? well I have a manual and all that about the sensors make sense. Would it just mean that the sensors are pretty worn out of the tranny that isn't engaging the power transfer properly?
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Old 07-09-2012, 02:23 PM   #27
mattfarrington
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Unless you have an old automatic that you are trying to force to kickdown by slamming the throttle, you will get better power delivery by easing the throttle on. This allows the engines sensors and fuel delivery system to cope with the extra demands instead of have to choke down a burst of low vacuum/extra air. It becomes very pronounced when you do it from a stop and car bogs before picking up speed.
THAT makes sense as to why I have a HUGE delay when taking off. It's like near stall then BAM GOODBYE. haha
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