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Dicko
Alfasud
Joined: 17 Jan 2004
Posts: 49
Location: Sydney
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 Posted: Sun Mar 07, 2004 5:30 pm Post subject: Fat pipes for my ported motor? |
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 Hoping for some advice to find the right extractors/ system for my 1.5 motor. THe 1.5 has raised compression, hotter cams and match porting, meaning larger ports for exhaust size.
The polished exhaust ports are spot on the same diameter as the original header (minus the soot build up).
Apparently this aint good enough.
Any contacts for custom exhaust systems / pre-made/ available in Oz?
or maybe NZ>>>???
Id like the motor to be streetable but also optimised for performance..
Advice anyone??
_________________
Too Many!! 33 QV 1.5 1986 (day driver, Sud 1.5 82 (toy) and Sud Ti Qv 84 (on hold), 1988 1.7 carbie too (wobly). |
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Eddie W
Alfa 33
Joined: 31 Jul 2003
Posts: 375
Location: new zealand
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| Posted: Tue Mar 16, 2004 10:07 am Post subject: |
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If you want to stick to a stock setup then the 1700 has bigger pipes.
Regards Eddie
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A LITTLE FURTHER A LITTLE FASTER |
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johnboy
16 Valve
Joined: 26 Jun 2003
Posts: 1061
Location: margate U.K
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| Posted: Tue Mar 16, 2004 11:36 am Post subject: |
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| Eddie W wrote: |
If you want to stick to a stock setup then the 1700 has bigger pipes.
Regards Eddie |
Eddie beat me to it. just put a 1.7 manifold on this will help
regards john
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WODA WE NEED? MORE POWER!!
Alfa gt jtdm blackline
1990 S2 16v veloce sleeping!
2002 ts gtv the wifes now
1997 seadoo gsx 800
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DICKO notsignedin.
Guest
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| Posted: Tue Mar 16, 2004 12:50 pm Post subject: HHMMMM |
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Ill get some measurements and check it out.
Dont think 1.7 Manifolds are so common in OZ.
My ports are 32mm...
 any guesses at 1.7 Exhaust manifold inner diameter?/?/?/
 any advice on tested units with wider extractor custom pipes?
Spiderman emailed me RE: the "ANSA" in Geneal Forum. Inner diameter about 35mm.
If any one can recomend how much difference in port to inner exhaust diameter
I should go... if not maximum. To get good resistane to negative air flow.
Dicko
Started the new motor with the old pipes / polution control and all, this should heat things up on the way to the muffler shop. |
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RBL
Alfa Sprint
Joined: 30 Mar 2003
Posts: 162
Location: Leicestershire
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| Posted: Fri Mar 19, 2004 8:26 pm Post subject: |
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I do know that the ID of the exhaust manifold flanges on the 1.7 are 35mm. Measured mine today as I need to get a set of new flanges for a custom system that Powerflow are making for me.
Hope that helps - anyone know where I can get 4 new flanges for a 1.7?? (ideally stainless) |
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alfistjen
Alfasud
Joined: 30 Jul 2003
Posts: 59
Location: Belgium
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| Posted: Fri Mar 19, 2004 8:36 pm Post subject: maybe this'll help |
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these guys still make nice spaghetti's
http://www.csc-marmitte.it/
Regards!
Paul D. |
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Eddie W
Alfa 33
Joined: 31 Jul 2003
Posts: 375
Location: new zealand
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| Posted: Tue Apr 13, 2004 11:53 am Post subject: |
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The 1700 exhaust starts at the same dia at the ports as the 1500 but steps up in size as soon as it clears the studs. The size increase is significant. There is a chap here in Auckland, NZ who makes up extractors for the racing guys but I have no idea of costs. Can supply you with a ph no if you want.
Regards Eddie
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Dicko
Alfasud
Joined: 17 Jan 2004
Posts: 49
Location: Sydney
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| Posted: Tue Apr 13, 2004 1:40 pm Post subject: Thanks for the know. |
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Could be a go...
be in touch....
_________________
Too Many!! 33 QV 1.5 1986 (day driver, Sud 1.5 82 (toy) and Sud Ti Qv 84 (on hold), 1988 1.7 carbie too (wobly). |
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Serpent33
Alfa Sprint
Joined: 06 May 2003
Posts: 210
Location: Singapore
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| Posted: Wed Apr 14, 2004 5:14 pm Post subject: Re: Fat pipes for my ported motor? |
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| Dicko wrote: |
Hoping for some advice to find the right extractors/ system for my 1.5 motor. THe 1.5 has raised compression, hotter cams and match porting, meaning larger ports for exhaust size.
The polished exhaust ports are spot on the same diameter as the original header (minus the soot build up).
Apparently this aint good enough.
Any contacts for custom exhaust systems / pre-made/ available in Oz?
or maybe NZ>>>???
Id like the motor to be streetable but also optimised for performance..
Advice anyone?? |
I made mine with standard extractors. They are seriously tapered at the end but can be cut off to get 2 inch exit. I joined a standard 16v centre pipe which is straight through and another straight through tail pipe.
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Each time I speed I say, "Dear lord, make me fast and accurate..." |
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