2.0ltr Turbo Exhaust Manifold..

[trialster 0]

hey guys, just wondering if anyone knew if the 2.0 ltr turbo engines found in XM's and 406's (?) share the same stud pattern as with the 1600 and 1900 205 gti engines?

 

ta

 

Will

[Anthony 1,003]

Yup, straight swap - AFAIK all 1.6/1.8/1.9/2.0 8v XU engines have the same exhaust manifold fitment (inlet manifold fitment differs though)

[welshpug 1,662]

IIRC that's exactly how Henry Yorke's Turbo Skip runs and how Tom Fenton has built his 1600 Turbo, the other option is the 205Parts updated Turbo Technics style manifold if you can find one.

[trialster 0]

excellent, cheers fellas!

[wracing 19]

i've done it, it works great std turbo good enough for a fair amount of boost 12psi intercooled, just please dont lower the comp ratio!

[trialster 0]

i've done it, it works great std turbo good enough for a fair amount of boost 12psi intercooled, just please dont lower the comp ratio!

 

sounds good.

 

why shouldn't i lower the comp ratio? thought it helped with the engine's ability to cope with the turbo?

[wracing 19]

well whats the point. as ive written before i was running 12psi on std 9.6:1 comp ratio, by lowering it you reduce the power off boost get. so good management, control the ignition and dome the combustion chambers running colder spark plugs and lower intake temps are the way to go.

[trialster 0]

well whats the point. as ive written before i was running 12psi on std 9.6:1 comp ratio, by lowering it you reduce the power off boost get. so good management, control the ignition and dome the combustion chambers running colder spark plugs and lower intake temps are the way to go.

 

colder spark plugs?

 

also, domed combustion chamber?

 

my main concern is predetonation due to high temps.

[Tom Fenton 1,542]

Colder running spark plugs conduct more heat away from the tip, as a glowing red hot tip can trigger detonation.

 

Not sure what he is on about with a domed combustion chamber, I removed some material from mine as I wanted to get the comp ratio down to 9:1.

 

There is no such thing as "predetonation". You are confusing "preignition" (also known as pinking) with "detonation", they are two different things.

Edited May 4, 2009 by Tom Fenton

[trialster 0]

Colder running spark plugs conduct more heat away from the tip, as a glowing red hot tip can trigger detonation.

 

Not sure what he is on about with a domed combustion chamber, I removed some material from mine as I wanted to get the comp ratio down to 9:1.

 

There is no such thing as "predetonation". You are confusing "preignition" (also known as pinking) with "detonation", they are two different things.

 

yes i realise i'm not very up to date with al the terms still learning!

 

cheers for the clear up though.

[wracing 19]

when i say domed combustion chamber i mean removing all protruding material from the head, things that assist lean burn cruse situation. with turbo applications with high compression ratio you want the most stable and uniform flame front possible. ill try find some pics to explain

[Alastairh 47]

IIRC that's exactly how Henry Yorke's Turbo Skip runs and how Tom Fenton has built his 1600 Turbo, the other option is the 205Parts updated Turbo Technics style manifold if you can find one.

 

Im sure Paul still has a few

 

Al