Is there and power gains from having an open neck over twin dump down pipe?

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Oct 23, 2003 | 12:41 PM

XXGOMXX

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Have the option of both but the twin dump is £60 cheaper

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Phil

Oct 23, 2003 | 02:48 PM

RB5_245

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There was a lot of chat about this a couple of months ago, i think the general opinion is single dump is better but i'm not sure how much, try a search for it over the last few months.

Oct 23, 2003 | 03:02 PM

XXGOMXX

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WOULD SEARCH BUT THAT FACILITY IS'NT OPEN TO ME AS TOLD BUT THE MOD AND TECH SUPPORT...I USE A APPLE MAC AND IT'S NOT COMPATIBLE...:-(

Oct 23, 2003 | 05:28 PM

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From: From 208BHP to 311BHP and 12.8sec 1/4mile

You wont really notice the difference. Both are far less restrictive than a closed neck which is standard on a scoob.

IMO Go for the cheapest and spend the spare dosh on something else

Just my opinion. Mine is a twin dump.

Cheers

Neal

Oct 23, 2003 | 05:49 PM

RB5_245

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Quote:

There's pros and cons to the various types of downpipe. There's an open bell-mouth (with and without splitter) and dual-dump pipes (where the dump tube joins close to, or far from - the main tube).

Open-neck pipes are claimed to allow earlier spool-up of the turbo and more low-range torque. Dual-dump pipes are said to give better top-end power at the expense of low-end grunt. Dual-dumps are said to be quieter as well, or at least can be quieter.

I went for a Scoobysport open-mouth downpipe, myself.

Lets see if this works?