Exhaust manifold (tubular)
Thread Starter
Scooby Regular
Joined: Aug 2000
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From: Settle, Cheshire, Istanbul
Hi,
I know someone is going to tell me this is the wrong section....
but,
Does anyone know of the benefits of running with a tuned exhaust manifold, or does anyone run with onw ?
I've been given the chance to purchase a stainless steel block to turbo pipe which looks fantastic.
BUT does it give any advantage ?
Mark
UK 94
1.3bar
Mongoose SS (decat system)
I know someone is going to tell me this is the wrong section....
but,
Does anyone know of the benefits of running with a tuned exhaust manifold, or does anyone run with onw ?
I've been given the chance to purchase a stainless steel block to turbo pipe which looks fantastic.
BUT does it give any advantage ?
Mark
UK 94
1.3bar
Mongoose SS (decat system)
Thread Starter
Scooby Regular
Joined: Aug 2000
Posts: 1,429
Likes: 0
From: Settle, Cheshire, Istanbul
Loose my lovely deep gravelly boxer sound ?
Noooooooooooooooooooooooooooooo
They guy said that it does alter the sound, but I thought it must make it better no worse !
Mark
Noooooooooooooooooooooooooooooo
They guy said that it does alter the sound, but I thought it must make it better no worse !
Mark
Guest
Posts: n/a
It depends on the manifold configuration.4-2-1 tube manifold configuration like BPM's,you will loose the boxer beat but if 4-1 tube configuration like OEM,then boxer beat is there,eg Zerosport.
But I am interested to know what kind of performance gains can be acheived from changing manifolds,eg turbo lag,low end torque,etc,etc.
Chan HT
But I am interested to know what kind of performance gains can be acheived from changing manifolds,eg turbo lag,low end torque,etc,etc.
Chan HT
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Scooby Regular
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Having driven with and behind a scoob with a PE manifold : it does sound a bit Hoover-ish below 4000 rpm, but sounds *very* good beyond that.
The car in question made 236 BHP (pretty normal) but ... 366 Nm torque with both cats still in place and no further tuning(apart from Scoobysport backbox). (RR comparable to PS)
Pete Croney can probably explain this better, but bear in mind that you can buy exhaust manifolds tuned for either torque or max BHP
The car in question made 236 BHP (pretty normal) but ... 366 Nm torque with both cats still in place and no further tuning(apart from Scoobysport backbox). (RR comparable to PS)
Pete Croney can probably explain this better, but bear in mind that you can buy exhaust manifolds tuned for either torque or max BHP
Scooby Regular
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hi mark
i have been looking at that an i also wouldn't like to loose the off beat sound. i know of a company that will port and flow all the standard manifold components reducing all the restrictions and i suppose that will probably be a lot cheaper than the PE one for example
.
evil
how much is 366Nm in bl/ft ? and how did other standard cars compare on the day ? so we can guestamite gains ? maybe
cheers
i have been looking at that an i also wouldn't like to loose the off beat sound. i know of a company that will port and flow all the standard manifold components reducing all the restrictions and i suppose that will probably be a lot cheaper than the PE one for example
.evil
how much is 366Nm in bl/ft ? and how did other standard cars compare on the day ? so we can guestamite gains ? maybe
cheers
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Joined: Oct 1999
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Sam, for your guestimate ... 366 Nm is about 268 lb/ft. My car made 273 lb/ft on that same rolling road, and that is with a VF23, 1.2 bar boost, Unichip, catless exhaust, etc..
This (Belgian) RR gave me 255 BHP (previous setup) while the car made 265 BHP at PS (still previous setup) 2 weeks later. With the new setup (VF23), it makes about 290 BHP on that RR.
Always difficult to compare - I really distrust RR's, but it does give you an a ballpark idea.
This (Belgian) RR gave me 255 BHP (previous setup) while the car made 265 BHP at PS (still previous setup) 2 weeks later. With the new setup (VF23), it makes about 290 BHP on that RR.
Always difficult to compare - I really distrust RR's, but it does give you an a ballpark idea.
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