Power loss mod?
#1
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Power loss mod?
So when I had my straight pipes I noticed at WOT the car was fast and the power was there but recently I put the borla catback + resonator removed back on and I feel a lot more faster for some reason also me and my friends 370 race around a lot. Before with straightpipes I would pull maybe 2-4 cars on him if I get a good start or if he doesn't jump me . But lately with the borla I've been pulling more of a 4-6 car lengths and we keep going i just keep pulling in him anyone know why? Maybe back pressure ? Or is it just a borla thing lol I doubt it though. Someone elaborate because I'm planning to do a custom quad magnaflow at the rear similar to the Greddy . Oh and one more thing I have ppe headers on both straight piped and now .
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#7
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On a naturally aspirated car, you do need some backpressure to extract maximum power. If the piping is too big, or the system too free flowing you might lose a lot of low-mid range power.
I picked up nearly 30whp peak and over 40whp in the midrange with my Borla system. Power was added from low- high and it got rid of the stock dip in power in the upper rev range. Gained power everywhere, it was an amazing mod and I love it.
I picked up nearly 30whp peak and over 40whp in the midrange with my Borla system. Power was added from low- high and it got rid of the stock dip in power in the upper rev range. Gained power everywhere, it was an amazing mod and I love it.
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#8
What is the difference in terms of power between the X pipe design and the dual pipe design on cat back systems on the F (no headers)? Has anyone actually done a test? I always assumed the X pipe design would result in turbulent exhaust flow and as such creating a more free flowing system would only benefit the power of the car, all be it by very few HP.
I can't see there being much of a difference as long as the pipe bore is the same as the stock pipe. Even if there is a difference I can’t see it being more than 5-10hp and I can’t see someone really feeling that power difference on a car with over 400 ponies.
Stu
I can't see there being much of a difference as long as the pipe bore is the same as the stock pipe. Even if there is a difference I can’t see it being more than 5-10hp and I can’t see someone really feeling that power difference on a car with over 400 ponies.
Stu
#9
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Do you think the exhaust you designed is better than the factory system? Its really going to come down to knowledge of air flow dynamics accompanied with time to test a product. Its very possible that your straight pipes are not suited for the power band of the car and slowing you down a bit.
#10
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On a naturally aspirated car, you do need some backpressure to extract maximum power. If the piping is too big, or the system too free flowing you might lose a lot of low-mid range power.
I picked up nearly 30whp peak and over 40whp in the midrange with my Borla system. Power was added from low- high and it got rid of the stock dip in power in the upper rev range. Gained power everywhere, it was an amazing mod and I love it.
I picked up nearly 30whp peak and over 40whp in the midrange with my Borla system. Power was added from low- high and it got rid of the stock dip in power in the upper rev range. Gained power everywhere, it was an amazing mod and I love it.
And i've owned the Borla before my HKS SSM
#11
Lexus Fanatic
LOL google the question and you will find you are not the only one. There are a few M3 owners with the same issue . HAve you checked for any leaks ?
#12
And:
https://www.clublexus.com/forums/is-...and-24wtq.html
#13
Tech Info Resource
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No engine needs "back pressure." That's what people who don't understand gas theory say.
#14
Lead Lap
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I stand correctly, I guess it stems from my Honda days where everybody would use that word loosely basically to describe the need to "restrict" the exhaust to an extent. The point remains that exhaust gas slows if the piping is too large or the system is too free flowing in the low to midrange, creating a loss of power.