Downpipe Dyno Charts - Power difference between SIZE
05-09-2005, 12:20 PM
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Downpipe Dyno Charts - Power difference between SIZE
I have searched and the closest I came up with is this.
What I want to see is back to back pulls with:
One car,
One Setup,
Same air temperature,
<U>Swapping between different down-pipe sizes and/or exhaust sizes.</U>
The reason for this is to help me (and anyone interested) in deciding if the:
cost to power ratio <u>- or -</u> hassle to power ratio
is worth the larger size (to me or anyone who cares
)
Personally to me I don't think it is but I am a DIY cheap type who isn't out for that last thousandth of a second etc.
Seems like you would get ~20 whp gains. Which would be fine if it wasn't much more expensive or a hassle (A/C etc.)
What I want to see is back to back pulls with:
One car,
One Setup,
Same air temperature,
<U>Swapping between different down-pipe sizes and/or exhaust sizes.</U>
The reason for this is to help me (and anyone interested) in deciding if the:
cost to power ratio <u>- or -</u> hassle to power ratio
is worth the larger size (to me or anyone who cares
)Personally to me I don't think it is but I am a DIY cheap type who isn't out for that last thousandth of a second etc.
Seems like you would get ~20 whp gains. Which would be fine if it wasn't much more expensive or a hassle (A/C etc.)
05-09-2005, 05:01 PM
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Re: Downpipe Dyno Charts - Power difference between SIZE (spoolingb20)
i have a 3.5 inch downpipe which i made for myself for around 50 buks...... my sc34 turbo spools nice and quick with it.
05-10-2005, 05:37 AM
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Re: Downpipe Dyno Charts - Power difference between SIZE (mademan2723)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mademan2723 »</TD></TR><TR><TD CLASS="quote">i have a 3.5 inch downpipe which i made for myself for around 50 buks...... my sc34 turbo spools nice and quick with it.</TD></TR></TABLE>
Thats nice. But it is not exactly what we are looking for. Is it?
Thats nice. But it is not exactly what we are looking for. Is it?
11-15-2005, 04:48 PM
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Re: Downpipe Dyno Charts - Power difference between SIZE (baphomet)
back from the dead..... can anyone answer this? I am wanting to go turbo soon and trying to do some research and learn how turbos work...
11-15-2005, 04:57 PM
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Re: Downpipe Dyno Charts - Power difference between SIZE (baphomet)
well what are you looking at here? from stock exhaust to a 4"? A 2.5" mandrel to a 3" mandrel? Also how much boost and HP are you running. If we can take at your dyno graph it'll be easy to see if it's chockin you at the higher RPMS. Sorry I couldn't help with anything concrete, but list a setup or something and start from there
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11-17-2005, 09:26 PM
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Re: Downpipe Dyno Charts - Power difference between SIZE (Full-Race Geoff)
idk turbo sizes yet but from what i hear that most people run.... either a t3 or 16g on a completely built head and rods and pistons upgraded....
11-17-2005, 09:36 PM
#9
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Re: Downpipe Dyno Charts - Power difference between SIZE (bmw626)
The size of the motor and turbo will determine how much of a gain there is. From my past experiences, with around a 57trim t3t4, stock gsr motor, 30whp going from open 2.5" dp to a 2 3/8" greddy exhaust. A bigger motor and/or bigger turbo will benefit even more.
11-18-2005, 02:09 PM
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Re: Downpipe Dyno Charts - Power difference between SIZE (tony1)
well i dont know anything about turbos. i am trying to learn about them cuzi want to go FI next year. and i want to do my build right the first time, so i will be upgrading and doing alot of work. I am looking at about $4500 for my motor build. so thats why i was wondering. but if you had a $4500 turbo setup on a d16z6, what size piping would you use?
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