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Location:
Melb
Registered:
June 2004
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Re: mandrel bend or standard bend exhaust
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Tue, 27 July 2004 02:27
 
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Was reading a book on modern engine tuning recently that discussed this at length. They conducted a series of tests with different cars, na and turbo- hot and stock running different exh setups.
Findings, in summary, were that running a mandrel bent system showed no more than (from memory) 0.2- 0.4 percent power increase. Even on a fairly wild Sierra Cosworth!
Further to this, they looked at running larger diameter piping (relative to the rest of the system) for the last few feet of the exh and found that it made no difference to the flow at all.
I would have to strongly agree with some of the points made about the first few feet of the exh being the most important, there is substantial data and theory to support this.
It really boils down to what you want for your car, if you have the cash and are building a wild machine that you want to wring everything out of- then sure it is common sense that a press bent system will have slightly more restrictions. For a car not so pushed to the limit, i would suggest you may not notice it. It is probably more important to get an exh that is well made, had good bends and joints that flow well. Sorry about the long post, thats my five bucks worth. Tom
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| | Subject | Poster | Date |
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mandrel bend or standard bend exhaust
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fade-e | Mon, 26 July 2004 06:42 |
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Re: mandrel bend or standard bend exhaust
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ae86slaver | Mon, 26 July 2004 06:56 |
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Re: mandrel bend or standard bend exhaust
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TurboRA28 | Mon, 26 July 2004 07:03 |
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Re: mandrel bend or standard bend exhaust
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TurboRA28 | Mon, 26 July 2004 07:05 |
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Re: mandrel bend or standard bend exhaust
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TA-022 | Mon, 26 July 2004 07:18 |
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Re: mandrel bend or standard bend exhaust
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Norbie | Mon, 26 July 2004 07:17 |
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Re: mandrel bend or standard bend exhaust
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ae86drift | Mon, 26 July 2004 07:54 |
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Re: mandrel bend or standard bend exhaust
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TurboRA28 | Mon, 26 July 2004 07:18 |
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Re: mandrel bend or standard bend exhaust
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fade-e | Mon, 26 July 2004 07:20 |
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Re: mandrel bend or standard bend exhaust
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TA-022 | Mon, 26 July 2004 07:58 |
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Re: mandrel bend or standard bend exhaust
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Chris Davey | Mon, 26 July 2004 08:05 |
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Re: mandrel bend or standard bend exhaust
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TA-022 | Mon, 26 July 2004 08:14 |
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Re: mandrel bend or standard bend exhaust
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AE86slut | Mon, 26 July 2004 08:19 |
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Re: mandrel bend or standard bend exhaust
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Norbie | Mon, 26 July 2004 12:32 |
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Re: mandrel bend or standard bend exhaust
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ae86drift | Mon, 26 July 2004 12:34 |
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Re: mandrel bend or standard bend exhaust
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Norbie | Mon, 26 July 2004 13:42 |
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Re: mandrel bend or standard bend exhaust
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oldcorollas | Mon, 26 July 2004 14:03 |
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Re: mandrel bend or standard bend exhaust
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ed_ma61 | Mon, 26 July 2004 14:08 |
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Re: mandrel bend or standard bend exhaust
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fade-e | Mon, 26 July 2004 15:52 |
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Re: mandrel bend or standard bend exhaust
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thomasbl | Tue, 27 July 2004 02:27 |
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Re: mandrel bend or standard bend exhaust
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TA-022 | Tue, 27 July 2004 06:37 |
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Re: mandrel bend or standard bend exhaust
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indian | Tue, 27 July 2004 07:03 |
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Re: mandrel bend or standard bend exhaust
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oldcorollas | Tue, 27 July 2004 08:00 |
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Re: mandrel bend or standard bend exhaust
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TA-022 | Tue, 27 July 2004 08:07 |
