2.4 20v 156 tubular manifold? - Alfa Romeo Forum
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(Post Link) post #1 of 29 Old 17-03-13 Thread Starter
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2.4 20v 156 tubular manifold?

Does anyone know where to get a 2,4 20v tubular manifold?
My cast one warped again... 4th in a row..
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I will try that, but some people think it would be more likely to crack. I know I should dril a hole at the end of the cut.

Should I skim it first en then cut it or the other way around?
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It's proven to work. Cut it through where possible, leave the hole at the cutend (helps to spread the stress forces equally around the hole) on the others.

If already bent, I would skim it first probably.

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hmm.. they are warped pretty much!
measured today , 1 is warped about 3mm , the other 5mm!
I've bought a coupe fiat 20vt tubular manifold wich has the same bolt pattern as my 20v has.
Just need to replace the turbo flange.
Probably going to use the audi turbine housing, those flanges are sold on ebay.
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Do the exhaust ports on the head match the Fiat coupe 20VT manifold?
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they use the same gasket so yeah.
I was already using a coupe gasket , its made of thicker material, more like a head gasket.
But with the manifold warped at 3mm, it leaked again..
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pff I seem to have a real heat problem!

I hadn't installed the gauge yet, so I have no idea what temp it got..
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Blimey - looks like that's been a tad hot...

How did that happen?
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Whats that green build up in 1st pic ?
Is this running your hybrid, is manifold much smaller than turbine inlet making high emp and finally whats your peak fuel, boost and soi looks like something a miss.
Even when i was seeing 850deg + on boost creep std turbo all id see on egt probe was light soot coating, wiped off probe like new under that.
You gotta be looking at 1000+ id guess to burst that probe?
Also in 1st pic i spot a carbon ring made by gasket or turbo inlet, looks like you could open port up a bit to match turbo this would help, if theres enough material in wall to allow.
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I once burst the sensor just like on that picture, but not it the car. I was measuring temperatures inside the burning chamber of gasification wood boiler. I got temperatures at around 1200°C when sensor just pooped open.
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what green build-up? its all black inside.
I Did open up the turbo inlet a bit , to match the manifold.
With the new manifold ill try to open it up more.

I'm running 1600bar
2.7 bar boost
start of soi?? idk , how can i tell?
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Quote:
Originally Posted by Allerd View Post
what green build-up? its all black inside.
I Did open up the turbo inlet a bit , to match the manifold.
With the new manifold ill try to open it up more.

I'm running 1600bar
2.7 bar boost
start of soi?? idk , how can i tell?
Connect FES and log it.

EDC16C8 has this possibility, euro 4 EDC16C39 hasn't unfortenately.
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Are you using latest software?
I can log pre inj mg + deg
Main inj mg+ deg
Post inj etc
Was new this last few months
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Originally Posted by sussexa View Post
Are you using latest software?
I can log pre inj mg + deg
Main inj mg+ deg
Post inj etc
Was new this last few months
Really? Awesome, I'll download the new version asap!
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Allright , i'll check.

I bought a coupe 20vt manifold , which does fit to the engine , but turbo mounting flange is in the wrong angle en sits much lower then original.
Also it came in pretty warped..
Not sure if I still wan't to use it , I'll need a complete new downpipe , and space would even be tighter as turbo would sit lower.
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Shame its warped. My colleague who has owned a few 20vt Fiats tells me this is common.
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Yes it is pretty common , it's a design flaw..
There is a guy on Dutch coupe forum that knows how to bend them back, and reinforcing them.
Also I would need to make a bracket on it for extra support because of the weight of the turbo.

I also found a perfect , newer type of 20v manifold at work. I'm very tempted to use that, and keep it as it is.
My problem is more software instead of hardware.
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Is 159 2.4 210bhp manifold any better?
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Design is better, but won't fit the 156.
156 turbo flange has a angle of about 15 degrees backwards, 159 45 deg forward.
Turbo would touch the radiator unless I put it upside down like on the 159. But then exhaust and inlet would be on the wrong side
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Quote:
Originally Posted by Allerd View Post
Allright , i'll check.

I bought a coupe 20vt manifold , which does fit to the engine , but turbo mounting flange is in the wrong angle en sits much lower then original.
Also it came in pretty warped..
Not sure if I still wan't to use it , I'll need a complete new downpipe , and space would even be tighter as turbo would sit lower.
I think you also get an issue with your oil return hose.
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no oil return is on the sump , so that sits pretty low, don't believe that will be a problem.
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Quote:
Originally Posted by sussexa View Post
Whats that green build up in 1st pic ?
Is this running your hybrid, is manifold much smaller than turbine inlet making high emp and finally whats your peak fuel, boost and soi looks like something a miss.
Even when i was seeing 850deg + on boost creep std turbo all id see on egt probe was light soot coating, wiped off probe like new under that.
You gotta be looking at 1000+ id guess to burst that probe?
Also in 1st pic i spot a carbon ring made by gasket or turbo inlet, looks like you could open port up a bit to match turbo this would help, if theres enough material in wall to allow.
boost 2700mbaar (bit higher atm because software not upgrades for bigger unit, shortened vnt lever)
fuel 90mm
soi 27
inj time 1.19
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Originally Posted by Allerd View Post
boost 2700mbaar (bit higher atm because software not upgrades for bigger unit, shortened vnt lever)
fuel 90mm
soi 27
inj time 1.19
Soi 27 deg but at which rpm?
1190 msecs inj time is quite a bit however. Mine is, if I recall right at 1080 msecs max.
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I'm not sure, but it was highest soi. I believe at around 4500.
I'll make a better log soon, have to recalibrate vnt arm
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