15 replies to this topic

[Danger Mouse]

Good afternoon.  Just been looking at ways of improving intake air flow into my 2.2 na.  I keep coming across the Vectra intake pipe.  Who has used this and does it fit o.k?  

 vectra intake.jpg   52.77KB   20 downloads

 

Apologies for borrowing picture.

 

[smiley]

Air flow is mostly dictated by the inlet manifold.

You can put on the manifold from the 2.4 engine. That will gain more top end, but steal some from the bottom end, and you need a remap to fix that. It's usually done in combination with other mods to make it worth while.

 

So for just the vectra pipe i would suggest to not get your hopes up to high on result.

 

Edited by smiley, 10 June 2016 - 03:56 PM.

[Danger Mouse]

Cheers mate.  I wasn't expecting a huge gain just wanted to get the most simple gains done I can before she goes in for mapping.  I've already done mod to airbox and now looking at this inlet pipe.  Cheap swap if it improves flow.  

 

 

Have people moved fuel pressure pipe to inlet manifold from intake as suggested on z22se.co.uk after de-restricting flow? 

[oakmere]

Don't bother with the vec c pipe it dosn't fit the VX very well. Shame as the keeps the OEM look but it is too short and is too high above the throttle body. Get a 90 and 45 silicone pipe and some 70mm pipe. The original pipe dose become a restriction on a high power N/A.

[oakmere]

Also don't bother moving the fuel pressure pipe the ecu will just change the fuel trims to compensate.

[2-20]

I've it installed.

 

I've somehow stretched its length with a heat gun. (permanently deformed)

But be careful, i've melted the first one and had to get a second one.

There was an issue with the length but not with the height.

[oakmere]

Mine rubbed on the boot lid. I have the 2.4 inlet and TB so may be the position is slightly different.

[2-20]

Same for me: 2.4 manifold and 65mm Tb on mine

[oakmere]

It sounds better than the silicone drainpipe setup on mine as well ☹️

[Danger Mouse]

That was going to be another path i was going to look at.  Replacing stock with silicone and ally pipework.  Have been looking at a 45 elbow from air-box, 100mm jointer, then 100mm hump hose to take out some vibrations and then 100 t piece with 13mm take off for breather and then a 90 onto throttle body.  All in 70mm. 

 

Would have to drill a 20mm hole in first ally tube for sensor and then if it is possible relocate fpr hose onto manifold.

[oakmere]

That will work. I haven't used a hump hose as the 90 and 45 silicone parts have enough flex.

[Danger Mouse]

Thanks. I'll give it a go. Have you seen any benefits? Trying to optimise before she goes in for remap.

[oakmere]

Yes there are gains on mine over the stock pipe but I am not sure at what Bhp level these gains will start to be seen.

[Danger Mouse]

Thanks again. What did you go for as a pipe and how did you fit pipes? Breather and fpr one?

[oakmere]

I used 68mm black drain pipe. I used some 90 degree barbed fittings I had at work for the fpr and breather.

[Danger Mouse]

I was along the same lines. Just need to find a couple of fittings. Cheers.