Exhaust Options On A Gti-6 Engined 205

[Miles 331 1 Cars]

Yes maniflow sell a 4-2-1 manifold for the GTi6 engine, Shame it's poor and worse than std. I think Pug Performace use allot of them, Garry on here has one fitted and all the pipe length's are different length's

[Batfink 201]

Apologies to all. I've learnt the hard way again.

 

It proves again what a resource this forum is. That was useful info from Pete (especially with the link) and from Maxi. Had I researched here first I would've been better prepared.

 

So Kev, I would be tempted to spend once and get it right, and get a custom manifold and system to suit the GTI6 style head.

 

Do Maniflow do an off the shelf version for the GTI6 style (XU7JP4, XU10J4R & RS) heads?

 

You have PM BTW.

 

If Maxi is happy at 240bhp with a standard gti-6 manifold I think I will not have any issues at 180-190bhp

Will see what I go with for exhaust. Budget is limited so the more off the shelf parts I can use, the less it will cost me and the quicker it can be running.

A standard exhaust system at trade will probably set me back less than £50

[taylorspug 7]

Kev- Im using a standard PH2 centre section with a stainless backbox on a standard '6 manifold at 187hp. The PH2 system is the one to have, the pipe diameter after the centre box is bigger than on the earlier versions.

[frobes2 0]

Kev- Im using a standard PH2 centre section with a stainless backbox on a standard '6 manifold at 187hp. The PH2 system is the one to have, the pipe diameter after the centre box is bigger than on the earlier versions.

 

 

Sorry taylorspug but PH... what is this as I need a downpipe/system and not sure what to use...

 

Thanks,

 

Scott

[Cameron 16]

Phase 2.

[SurGie 54]

Garry on here has one fitted and all the pipe length's are different length's.

 

 

Would that make a difference in the power figure's ?

& would the car sound like a scooby STI does ?

[DrSarty 90 1 Cars]

Would that make a difference in the power figure's ?

& would the car sound like a scooby STI does ?

 

Only a boxer engine will sound like a boxer engine.

[Baz 421]

[andyjstone 6]

Only a boxer engine will sound like a boxer engine.

 

Bit off topic but I do miss the sound my Scooby made, but that's all I really miss about it! I used to have an Alfa V6, now that made a good noise, used to bring a smile to your face every time you fired it up, until you realised half the electrics had stopped working .

Edited November 4, 2009 by andyjstone

[bales 1]

Only a boxer engine will sound like a boxer engine.

 

To be honest I don't think it was that stupid a comment, the reason everyone gives as to why they have the offbeat warble is because of unequal-length headers. If you change them (like on the later scoobys) to an equal length then they do lose a lot of the distinctive sound...

 

Obviously there are other factors to why the sound the way they do like the firing sequence etc...but I still think it's a fair comment.

[Cameron 16]

Would that make a difference in the power figure's ?

 

Yes it would, as you'd only have one cylinder with near optimum length.

[Batfink 201]

apparently the unequal lengths are to give a better spread of torque across the rev range. Never bothered to look further into it as I dont have a scooby

[Cameron 16]

I thought it was just for packaging reasons.

[welshpug 1,661]

would imagine the opposite was true, the later equal length was for torque

[Batfink 201]

would imagine the opposite was true, the later equal length was for torque

 

would an equal length give a better peak torque, as it will be optimised for a certain rev point? A quick google seems to suggest that the unequal pipes help scavenging at low rpm so better power low down..

 

....maybe to combat off boost lack of power????

[Cameron 16]

I'm not sure.. I think the pipes would need to be a lot longer to boost low rev performance a few Krpm down!

[bales 1]

would an equal length give a better peak torque, as it will be optimised for a certain rev point? A quick google seems to suggest that the unequal pipes help scavenging at low rpm so better power low down..

 

....maybe to combat off boost lack of power????

 

But scavenging is to do with the harmonics of the system, different lengths give the effect at different points in the power/torque curve, so I wouldn't of thought that it is specifically 'unequal' but just part of the design to get the correct length of the primaries at the collector or merge point, so that the waves arrive at the correct time...

 

I had always assumed it was a packaging/cost issue, as most of the tuned/later ones tend to go to equal length ones like the spec C etc...

[Batfink 201]

i'm not going to defend their corner lol, just is what I heard. could be bull..

I'd have thought that they would have redesigned the shell a bit if they wanted to sort the packaging aspect, being a rally bred car model, but you never know what the bean counters dictate!

[Galifrey 1]

To be honest I don't think it was that stupid a comment, the reason everyone gives as to why they have the offbeat warble is because of unequal-length headers. If you change them (like on the later scoobys) to an equal length then they do lose a lot of the distinctive sound...

 

Obviously there are other factors to why the sound the way they do like the firing sequence etc...but I still think it's a fair comment.

 

A lot of the Scooby burble is down to the unequal length headers, resulting in 2 cylinders pulsing at the same time onto the turbo (alledgedlly faster spooling but less top end). If you were to do this on an inline 4 you might get the sound, but little else desirable.

 

The headers are unequal length for simple packaging, getting them the same length with a turbo in the same place is a bit of snake work, but doable.

 

Rich, can a VW Beetle sound like a Scooby then?

Edited November 4, 2009 by Galifrey

[Batfink 201]

i know an mi16 on 3 cylinders sounds similar

dog slow though lol

[oli-pug 6 2 Cars]

Just bringing this topic back to life!

 

I'm having a new exhaust system made up for my car on saturday at MIJ Performance in Walsall. I spoke to Jay there, who says he's done quite a few systems for higher powered mi16 and gti-6 engined 205s and mentioned that he helped with the DES Developments grp.n and grp.a stainless exhausts from time to time (I have no idea if this is true, but he seemed to know what spec the systems were )

 

They're making me a full exhaust with a 2.5" downpipe, centre box then 2.25" bore from there to backbox then a tailpipe of my choice (will probably be 2.25" straight cut) Price is very good too and I'll be able to test this back to back with my current exhaust (ph2 downpipe to 1 7/8" magnex twin box)

 

Will report back with my feedback over the weekend.

[DrSarty 90 1 Cars]

What sort of money Oli?

[oli-pug 6 2 Cars]

I'll be discussing the full details tomorrow in person, but I explained to Jay that a good exhaust for 16v powered 205s is well in demand nowadays, so I'm pretty confident some discount can be wangled there

 

The initial quote given to me without any discount was £295 for a full manifold back system, T304 TIG welded, lifetime guarantee.

 

Any provisional interest?

Edited December 11, 2009 by oli-pug

[welshpug 1,661]

sounds a decent price, £10 more than Longlife charged me for one of their systems some 4 years ago

[oli-pug 6 2 Cars]

Longlife want £399 now £299 for system, £100 for a downpipe.

 

Pipewerx were £450+

 

sounds a decent price, £10 more than Longlife charged me for one of their systems some 4 years ago