57 replies to this topic

[TheRealVXed]

Hi guys, just after some advice on the above. What do you think is the best induction kit/do you think it is worth the money? Cheers VXed

[james141]

ITG is the best but very expensive! Pipercross Viper is great but still quite expensive Pipercross Venom is the same as the Viper just not carbon fibre so its cheaper approx £80

[Crazyfrog (Fab)]

ITB'S ........

[BAZ8465]

This is very much a matter of opinion. I’ve got a Viper – Sounds good and may give a tiny bit of a gain – I got it cheap though – I don’t think I’d be paying the £100 Plus for one….

[Sutol]

I will have an ITG up for sale soon. If anyone is interested please pm me.

[Muncher]

ITG is by far the best, but most expensive.

[slindborg]

std paper one

[Whiteboy]

Standard deresricted air box with cotton filter.

[Winstar]

std paper one

Standard air box modified and change the filter at least once a year.

Edited by Winstar, 24 February 2010 - 12:21 PM.

[TheRealVXed]

ITB'S ........

One day

What do you need to do to the standard airbox in terms of modification? I fancy keeping the original paper filter in a way because they are more effective for stopping small particles than the cotton/mesh ones.

Edited by VXed, 24 February 2010 - 12:30 PM.

[Winstar]

Firstly, it helps when asking a question like this to state which version of the VX you've got, as I've just noticed you've got a NA from the other thread on getting a viper and most of the answers above are by turbo owners.

The NA box is a better shape for derestricting as the air enter one side and leaves the other and it's abit more scientific than just drilling holes all over it.

To derestrict the air box:

-First remove the airbox from the car, best done through the wheel arch.
-Remove the top part off and remove the NVH cone from the outlet by sliding it off.
-Take out the air filter, you may as well replace as they're dirt cheap,
-In the bottom section you'll see a long section of inlet pipe that extends into the box. Take this out and cut it in half, you'll need side cutters as it's reinforced with wire.
-Then next to the original inlet hole cut another inlet hole the same size as the original
-Refit the inlet pipe sections into the 2 hole extenting into the box as little as possible.
-Reassemble and refit to the car.

Doing this means that the air path is shorter and does not double back on itself, I have also found that compared to before I did this I have a far more even filter loading of dirt meaning a more uniform use of the filter and therfore it should have a lower pressure loss.

[dapimp]

ITB'S ........

One day

What do you need to do to the standard airbox in terms of modification? I fancy keeping the original paper filter in a way because they are more effective for stopping small particles than the cotton/mesh ones.

Dead easy to do, I actually used the cone that I removed as the second inlet tube, looks quite OEM. I'd sell you my customised airbox but as the extra cone pipe is glued on it won't travel well in the post.

I've got a Pipercross air filter if you want to make me an offer, works well with the modified airbox. I had this before going for the Viper (which I bought cheap of ebay, it was a golf one, a quick hacksaw at the extra pipe and it fits perfectly).

So you could watch ebay for a cheap second hand Viper, they are all almost identical just with extra bits welded on to make them a straight swap for the advertised car.

[Paulus H]

I really like my ITG. Having looked at the std arrangement, I can see where possible gains can be made. However when you look at the std unit, it is very difficult to imagine that any modification is going to make the std unit flow air as well as the ITG. Once the std unit is off the car you will see what I mean. PM me and I'll send you photos of he std unit (it is not easy to see the compromises when in situ). Funnyly enough I bought the ITG from my local dealer. They gave me a good discount and it was sensible priced. Most parts are expensive from a Vauxhall Main Dealer but not everything, it is always worth giving them a try. ITG is quiet when you want it to be. It is not like a Nove/Corsa Halfords special. It sounds amazing flat out before you hit the limiter.

[iceman]

You get what you pay for = ITG's [/simple equation]

[Winstar]

Having looked at the std arrangement, I can see where possible gains can be made. However when you look at the std unit, it is very difficult to imagine that any modification is going to make the std unit flow air as well as the ITG.

And how many intake sytems have you designed? unfortunatly most people don't actually have a clue what fluid flow is like though a bend let alone several and a porous media.

[TheRealVXed]

I have a book by David Vizzard (an absolute guru on engines/performance) and has about 100 pages relating to the intake and airflow etc... different things make different types of performance and I have only skimmed it so far. I will have the std airbox out, read the book to death, and then see what is what! Thanks for the help guys!

[siztenboots]

Having looked at the std arrangement, I can see where possible gains can be made. However when you look at the std unit, it is very difficult to imagine that any modification is going to make the std unit flow air as well as the ITG.

And how many intake sytems have you designed? unfortunatly most people don't actually have a clue what fluid flow is like though a bend let alone several and a porous media.

yep, not just air flow at a given rpm, but consistent cylinder fill and air velocities across the whole rpm , variable inlets

[theolodian]

Having looked at the std arrangement, I can see where possible gains can be made. However when you look at the std unit, it is very difficult to imagine that any modification is going to make the std unit flow air as well as the ITG.

And how many intake sytems have you designed? unfortunatly most people don't actually have a clue what fluid flow is like though a bend let alone several and a porous media.

And you obviously have never seen the stock NA intake.

[Winstar]

And you obviously have never seen the stock NA intake.

I have (plus analysed a few) with a few modifications the standard airbox will flow just as well as an ITG, viper, etc.

[theolodian]

And you obviously have never seen the stock NA intake.

I have (plus analysed a few) with a few modifications the standard airbox will flow just as well as an ITG, viper, etc.

My point still stands. You have not looked at the intake. The ITG intake is measurably better than stock.

I did not say airbox.