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Author Topic: V6 Exhaust manifolds  (Read 276 times)

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456lbft

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V6 Exhaust manifolds
« on: 19 May 2019, 22:12:55 »

Years ago I made these for a Vectra challenge car that was running on LPG as a marketing exercise for alternative fuels. The engine had also been built by Swindon Race Engines, but apparently the manifolds contributed an extra 20 bhp.  Also it gave the car a very distinctive howling engine note, which was particularly popular with fans and sponsors Calor. Now I'm thinking about making some inline versions for my newly acquired MV6. I would obviously have to fit some cats in the link pipes, and it looks as though all 4 lambda bosses could be moved to a suitable position either side of the cats to still give a worthwhile output to the ECU and avoid the dreaded EML warning. It looks as though there is plenty of room for each 3-1 to be fitted without having to resort to a slip on collector as pictured, which we wouldn't get away with cats fitted anyway because of potential leakage. This would only be a personal exercise because it would be far too time consuming to be commercially viable.
Probably just a pipe dream (ha, ha) but it's fun to imagine how it could sound, and the extra torque that it might generate.
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dave the builder

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Re: V6 Exhaust manifolds
« Reply #1 on: 19 May 2019, 22:32:13 »

Nice looking pipes  ;)
much nicer than the cast clumps  hanging from an omega  :P
probably not financially viable for an Omega though  :'(
but fantastic work all the same  :)
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BazaJT

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Re: V6 Exhaust manifolds
« Reply #2 on: 20 May 2019, 07:42:32 »

The one at right of picture looks pretty convoluted[presumably for length versus space available?]must have took you some working out.very impressive though :y
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456lbft

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Re: V6 Exhaust manifolds
« Reply #3 on: 21 May 2019, 08:12:26 »

It will be much easier to package the lengths on an Omega. :)
Does anyone know if the exhaust port shape on a 2.5 os the same as the 3.2. I know the 3.2 doesn't have secondary air injection.
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