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EXHAUST MANIFOLDS - 2WD OR 4WD??????

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Old 20-08-2007, 04:03 PM
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Default EXHAUST MANIFOLDS - 2WD OR 4WD??????
currently have a 2wd exhaust manifold on my 4x4 saph but wondering if it would be worthwhile to change back to the 4wd one?
currently running stage 3 on greens but will soon be going for a live map on greys
any comments
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Old 20-08-2007, 04:06 PM
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Dan
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Keep the 2WD one then Ian as far as I know, not sure at what power but I think the 4x4 one is certainly more restrictive than a 2WD one.

Sure someone will correct me if i'm wrong!
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Old 20-08-2007, 04:07 PM
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2wd ones are better for higher power
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Old 20-08-2007, 04:07 PM
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2wd = better for flow and more power


4x4 = for low lag, and a restriction on big power
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Old 20-08-2007, 04:09 PM
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thought so but wondered if it would be better to use the 4x4 one for around 400 ish bhp
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Old 20-08-2007, 04:10 PM
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Dan
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No mate, if I had to quote a figure that someone told me the 4x4 one becomes restrictive then it was around 350+ I think
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Old 20-08-2007, 04:12 PM
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you can run a T4 on a 4x4 manifold ive seen it
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Old 20-08-2007, 04:13 PM
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Originally Posted by JTECHSAFF
you can run a T4 on a 4x4 manifold
You could run a bloody T66 on one aswell James!?
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Old 20-08-2007, 04:14 PM
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most of the restrictions come from the turbo itself, not ther manifold,

ive never seen a T4 car run 350 bhp, why would you suffer all the lag for no reason?

almost like An rs500 and standard they were hidious
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Old 20-08-2007, 04:15 PM
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Originally Posted by Dan
Originally Posted by JTECHSAFF
you can run a T4 on a 4x4 manifold
You could run a bloody T66 on one aswell James!?
you couldnt, as the compressor housing wouldnt clear the head
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Old 20-08-2007, 04:16 PM
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PMSL

So what power are they restrictive if at all then James?
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Old 20-08-2007, 04:18 PM
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i have no idea, , over 400 though i would have thought
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Old 20-08-2007, 04:32 PM
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the t4 on a 4x4 manifold is tight getting on and off.

much easier with the 2wd one.
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Old 20-08-2007, 04:42 PM
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SECS had a T4 on a 4x4 Manifold
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Old 20-08-2007, 04:44 PM
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Originally Posted by Charlie Chalk
SECS had a T4 on a 4x4 Manifold
so did i.
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Old 20-08-2007, 04:45 PM
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I didn't know that
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Old 20-08-2007, 04:46 PM
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you do know.
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Old 20-08-2007, 04:47 PM
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good to see you yesterday again matey
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Old 20-08-2007, 04:47 PM
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The better flowing manifold is the 2wd version............So why piss around with a 4 x 4 version......
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Old 20-08-2007, 04:49 PM
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Originally Posted by Charlie Chalk


good to see you yesterday again matey
you too Rad.
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Old 20-08-2007, 05:14 PM
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Originally Posted by Jim Green
The better flowing manifold is the 2wd version............So why piss around with a 4 x 4 version......
the 2wd one may flow better, but isnt without its problems imo, the need to run a damper, the second joint that always leaks, gettting to the manifold bolts

as he already has a 2wd one on the car ,i would stick with it, but if i had the choice it would be a tough decision at the power level he is talking about

you would need a good reason to run a 2wd one over the 4wd, and imo 400bhp isnt that reason
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Old 20-08-2007, 06:41 PM
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Originally Posted by Charlie Chalk
SECS had a T4 on a 4x4 Manifold
was not a t4
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Old 20-08-2007, 07:08 PM
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It 4x4 restiction after 420 bhp
and it is because the curves on it shags the flow
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Old 20-08-2007, 07:11 PM
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Originally Posted by JTECHSAFF
Originally Posted by Dan
Originally Posted by JTECHSAFF
you can run a T4 on a 4x4 manifold
You could run a bloody T66 on one aswell James!?
you couldnt, as the compressor housing wouldnt clear the head
yes you could, easily, with an on-centre housing rather than a tangential one
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Old 20-08-2007, 07:17 PM
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Originally Posted by cossiedave
Originally Posted by Charlie Chalk
SECS had a T4 on a 4x4 Manifold
was not a t4
I beg to differ!!!

I'll find the pictures
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Old 20-08-2007, 07:34 PM
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you do that
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Old 20-08-2007, 08:07 PM
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Originally Posted by cossiedave
you do that



Pictures have been taking down from Simon, but it clearly states T4 on a 4x4 Manifold.....


(edit, Pictures on page 2! )

https://passionford.com/forum/viewto...800&highlight=
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Old 20-08-2007, 10:31 PM
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Originally Posted by 68332
I decided to leave my original cast 4x4 manifold on.
This has had a minor internal port job done on it to improve flow.
(Me and a BIG dremmel )

These 4x4 manifolds are supposed to have a 430ish BHP limit but I will find out how far I can push it !
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Old 21-08-2007, 09:42 AM
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think I'll leave the 2wd manifold on then, didn't fancy taking that thing off again
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Old 21-08-2007, 10:08 AM
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Originally Posted by IANS2RST
think I'll leave the 2wd manifold on then, didn't fancy taking that thing off again
WTF why did you ask then
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Old 21-08-2007, 10:32 AM
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Originally Posted by RS500/364
Originally Posted by IANS2RST
think I'll leave the 2wd manifold on then, didn't fancy taking that thing off again
WTF why did you ask then
because i have a a 4wd manifold sat in the garage & wondered if it would be better to use this for the intended power level to reduce lag
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Old 21-08-2007, 11:27 AM
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Originally Posted by cossiedave
Originally Posted by Charlie Chalk
SECS had a T4 on a 4x4 Manifold
was not a t4
Yes it was.
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Old 22-08-2007, 05:39 PM
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you may be right as he had one off doug but not for long as he did,nt like it
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