What's the difference... 4-1 and 4-2-1 - Corsa Sport - for Vauxhall and Opel Corsa B, Corsa C and Corsa D

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dan_m1les

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Registered: 8th May 06
Location: Burnham, Buckinghamshire
User status: Offline

17th Feb 11 at 00:35

What are the pros and cons on 4-1 manifolds and 4-2-1 manifolds?

Mark.W

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Registered: 3rd Jan 07
Location: County Durham
User status: Offline

17th Feb 11 at 00:39

4-2-1 low down the rev rage gain and 4-1 is better top end.

BluKoo

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Registered: 8th Apr 02
Location: Stonehaven (Scotland)
User status: Offline

17th Feb 11 at 00:41

Really? I thought 4-2-1 was better full stop because of the smoother air flow.

Edit: I know nothing though, thats just an assumption on my behalf.

[Edited on 17-02-2011 by BluKoo]

dan_m1les

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Registered: 8th May 06
Location: Burnham, Buckinghamshire
User status: Offline

17th Feb 11 at 12:36

Would be going on a 1.6 VTS, i'd assume a 4-2-1 would be the best bet, to get more out of the low end?

Neo

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Registered: 20th Feb 07
Location: Essex
User status: Offline

17th Feb 11 at 12:40

4-2-1 has been proven to give better and smoother gains.

dan_m1les

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Registered: 8th May 06
Location: Burnham, Buckinghamshire
User status: Offline

17th Feb 11 at 12:47

coolio, will get the system ordered up then

Fitted by induction kit last night, K&N Gen 2 and throttle response seems to be quite a bit better, plus i enjoy the noise a bit too much.

Jambo

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Registered: 8th Sep 01
Location: Maidenhead, Drives: VXR Arctic
User status: Offline

17th Feb 11 at 12:59

The difference is 2

mike56gte

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Registered: 23rd Jun 09
Location: Fife, scotland Drives: Audi S3
User status: Offline

17th Feb 11 at 13:04

quote:
Originally posted by Jambo
The difference is 2

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Robin

Premium Member

Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline

17th Feb 11 at 13:10

quote:
Originally posted by BluKoo
Really? I thought 4-2-1 was better full stop because of the smoother air flow.

Edit: I know nothing though, thats just an assumption on my behalf.

[Edited on 17-02-2011 by BluKoo]

If that was the case, f1 teams would have used 4-2-1 on the current v8s

kerryevans08

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Registered: 10th Nov 08
Location: merthyr tydfil south wales
User status: Offline

17th Feb 11 at 14:15

but a 4-2-1 wouldnt fit a v8

tom_simes

Show Staff
Organiser: South Wales
Premium Member

Registered: 12th Jan 05
Location: Undy, Newport Drives: Skoda Octavia vRS estate
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17th Feb 11 at 14:15

quote:
Originally posted by kerryevans08
but a 4-2-1 wouldnt fit a v8

There's a hint in the 'v' bit - each side runs 4 cylinders.

kerryevans08

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Registered: 10th Nov 08
Location: merthyr tydfil south wales
User status: Offline

17th Feb 11 at 14:17

true story... didnt think of that part lmao

Mark Prydderch

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Registered: 7th Mar 07
Location: Chester
User status: Offline

17th Feb 11 at 14:24

quote:
Originally posted by Mark.W
4-2-1 low down the rev rage gain and 4-1 is better top end.

Thought it was the other way round? I had a 4-1 on my 106 gti.

Rob R

Member

Registered: 31st May 03
Location: Kent
User status: Offline

17th Feb 11 at 15:27

4-1 will make all the power top end, hense why F1 teams use that setup as they're constantly flat out

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