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 16v_DUB |
16v_DUB from Romania (Muntenia) posted @ 28 January 2011 15:30:54 |
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1992 Corrado 20VT
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Now, i used to run on a 2.8 vr6. i bought a 2.9 engine (recently rebuilt) to put instead and i wonder what intake manifold is better to use. i've heard some things about 2.9 engine with 2.8 intake being the best combination. does anyone know more about this or anyone tryed this? left-2.8, right-2.9 manifold:
http://www.vr6oc.com/images/Guides/manifolds/manifold2.jpg
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 Tornado |
Tornado from Cyprus (Cyprus) posted @ 28 January 2011 17:00:53 |
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1990 Corrado 1.8 G60
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I think the 2.9L intake manifold is better because the ports are slighlty bigger thus better flow 
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| 16v_DUB |
16v_DUB from Romania (Muntenia) posted @ 28 January 2011 17:29:10 |
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1992 Corrado 20VT
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that sounds logic, but bigger ports may also cause less speed for the air. a friend of mine read some years ago about 2.9 manifold causing a weakness somewhere around 3000rpm. sadly he doesn't remember what forum that was and i couldn't find anything about this subject, most of the guys are trying to make 2.9 manifold clones for their 2.8s and to be honest i have a feeling that doesn't improve anything. but the 2.9 engine with 2.8 manifold could be something. nobody here tried that? come on guys, i need to know which manifold should i choose for polishing work =))
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| Tornado |
Tornado from Cyprus (Cyprus) posted @ 28 January 2011 19:24:33 |
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1990 Corrado 1.8 G60
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You didn't mentioned anything about port & polish before... If you're gonna port & polish the intake then I'm almost sure that it doesn't matter which one you use. Your best bet would be to post a thread (your guestion) on VWVortex in the VR6 technical forum. Good luck
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| 16v_DUB |
16v_DUB from Romania (Muntenia) posted @ 28 January 2011 19:40:28 |
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1992 Corrado 20VT
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what i meant by polishing was for the outside, just for the look. i will try to find answers there ass well. anyway if there's somebody that experienced that, this thread is also open. technical info's allways welcome.
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 Bozo |
Bozo from Netherlands (Groningen) posted @ 28 January 2011 23:30:27 |
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1990 Corrado 1.8 G60
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2.9 manifold with 2.9 trottlebody and brown injectors is what u need .
if the 2.9 manifold gives u a powerloss in any rpm then u only have to fine tune the settings
more air means more fuel at a given point more air and less fuel means that ur car runs a bit sloggy.
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 pikske |
pikske from Belgium (Limburg) posted @ 8 December 2011 13:36:33 |
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1992 Corrado 2.9 VR6
1989 Corrado 1.9 TDI
1991 Corrado 1.9 TDI
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look for a vsr & add the 2.9 trottlebody;
than you have a "short runner" until 4000 tr/min
and a long runner after 4000 tr/min
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