| | 4 Branch manifold?? |  |
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Wayders
 Number of posts : 212
Age : 55
Location : Kings Lynn
Drives : Mk1 2Ltr 16v
Registration date : 2009-02-26
| | Subject: 4 Branch manifold?? Mon Mar 30 2009, 09:27 | |
| Hey peeps Just wondered if anyone could tell me the difference between a 4-2-1 aftermarket 16v conversion manifold and the 4-1 one? Cheers M..  | |
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h5lrw
Number of posts : 46
Age : 42
Location : Norfolk
Drives : Corrado Valver (Road) MKII (Race)
Registration date : 2009-03-25
| | Subject: Re: 4 Branch manifold?? Mon Mar 30 2009, 10:53 | |
| Reply from Dubgen:
The 4 -1 has 4 pipes that run into the collector, then a single pipe that runs down the car into the various back boxes etch.
The 4 - 2 - 1 runs 4 pipes from the manifold a short distance to a collector then 2 pipes to a 2nd collector (like a standard MKII GTI system) and finally 2 into 1 that runs down the centre of the car etc.
I think that the principal of the 4-2-1 is that gas flow is slightly greater than the 4-1.
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Wayders
Number of posts : 212
Age : 55
Location : Kings Lynn
Drives : Mk1 2Ltr 16v
Registration date : 2009-02-26
| | Subject: Re: 4 Branch manifold?? Mon Mar 30 2009, 11:05 | |
| - h5lrw wrote:
- Reply from Dubgen:
The 4 -1 has 4 pipes that run into the collector, then a single pipe that runs down the car into the various back boxes etch.
The 4 - 2 - 1 runs 4 pipes from the manifold a short distance to a collector then 2 pipes to a 2nd collector (like a standard MKII GTI system) and finally 2 into 1 that runs down the centre of the car etc.
I think that the principal of the 4-2-1 is that gas flow is slightly greater than the 4-1.
Cheers mate Yeah i meant performance wise.. | |
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bridgedubber
Number of posts : 1831
Age : 39
Location : Sutton Bridge, Lincolnshire
Drives : mk2 golf gti 2.0 8v, mk2 golf gti 2.0 16v ABF, mk4 golf gt tdi
Registration date : 2008-02-16
| | Subject: Re: 4 Branch manifold?? Mon Mar 30 2009, 11:08 | |
| i think one helps with torque more | |
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h5lrw
Number of posts : 46
Age : 42
Location : Norfolk
Drives : Corrado Valver (Road) MKII (Race)
Registration date : 2009-03-25
| | Subject: Re: 4 Branch manifold?? Mon Mar 30 2009, 11:08 | |
| No probs.
The longer the inlet/exit tract the more torques is produced.
There's alot of witchcraft you can do with numbers and funny shaped letters to work it all out but thats beyond my knowledge I'm afraid. | |
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Wayders
Number of posts : 212
Age : 55
Location : Kings Lynn
Drives : Mk1 2Ltr 16v
Registration date : 2009-02-26
| | Subject: Re: 4 Branch manifold?? Mon Mar 30 2009, 11:17 | |
| - h5lrw wrote:
- No probs.
The longer the inlet/exit tract the more torques is produced.
There's alot of witchcraft you can do with numbers and funny shaped letters to work it all out but thats beyond my knowledge I'm afraid. Would the 4-1 be ok with the 9a conversion i'm doing then? Cheers M.. | |
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h5lrw
Number of posts : 46
Age : 42
Location : Norfolk
Drives : Corrado Valver (Road) MKII (Race)
Registration date : 2009-03-25
| | Subject: Re: 4 Branch manifold?? Mon Mar 30 2009, 11:21 | |
| Yep I'd go that way tbh.
There wouldn't be a notable difference between the 2 systems unless the engine had some head work and was running a lairy cam. | |
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Wayders
Number of posts : 212
Age : 55
Location : Kings Lynn
Drives : Mk1 2Ltr 16v
Registration date : 2009-02-26
| | Subject: Re: 4 Branch manifold?? Mon Mar 30 2009, 11:27 | |
| - h5lrw wrote:
- Yep I'd go that way tbh.
There wouldn't be a notable difference between the 2 systems unless the engine had some head work and was running a lairy cam. Nah gonna be running k-jet fuel set up with KR inlet and cams.. | |
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Dan34
Number of posts : 1409
Age : 33
Location : Wisbech
Drives : DC5
Registration date : 2008-12-28
| | Subject: Re: 4 Branch manifold?? Mon Mar 30 2009, 14:12 | |
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| | 4 Branch manifold?? | |
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