Veilside Intake vs Virtual Works - FINALLY flow test results on SF

[Sharpie]

Just found this...

http://www.supraforums.com/forum/showthread.php?s=&threadid=166026

To me, it looks like over the last 12 months or so, some of the big boys here in the UK have been going with the Veilside IM.

[Syed Shah]

The veilside is popular with some simply because it is the most expensive, and looks nice. As those tests show, it is not the best performer.

[Usmann A]

Yes, but they go on to say, that the actual method of testing on a flowbench cannot prove, anything but Runner flows, hence they need to be put on a engine dyno, under real circumstances.

OK, yes the VS has velocity stacks, which to many hinder smooth airflow, but get it under High boosting conditions with real turbulance, things may differ.....

Its all well and good to do a airflow test and say, well this is this, and that is better than that, you have to get it under a hood, to see how it really performs, and affects engine response/power etc.


I alwasys assumed that the Volume of the Plenum should be at least 1.5 x the displacement ? Some say more ....



MY 2P worth.

[dude]

Originally posted by Usmann A
Yes, but they go on to say, that the actual method of testing on a flowbench cannot prove, anything but Runner flows, hence they need to be put on a engine dyno, under real circumstances.

OK, yes the VS has velocity stacks, which to many hinder smooth airflow, but get it under High boosting conditions with real turbulance, things may differ.....

Its all well and good to do a airflow test and say, well this is this, and that is better than that, you have to get it under a hood, to see how it really performs, and affects engine response/power etc.


I alwasys assumed that the Volume of the Plenum should be at least 1.5 x the displacement ? Some say more ....



MY 2P worth.

I agree with Usmann , flow results mean shit on their own , its the dyno results that really tell the tail !!!!:thumbs:

Dude:flame Dev

[Syed Shah]

I'm less concerned with flow as I am with cylinder distribution, and a flow bench does give us that. It is the only reason to upgrade from stock anyway, as it can handle 800+ HP, but not with satisfactory distribution.

As for Velocity stacks, I have never heard of anything good about them for serious turbo applications. The evidence from the AEM tuners ties in with this.

:)

[Usmann A]

Yes Syed, I agree cylinder distribition is important, but surely testing the Intakes at only atompsheric pressure can only give a rough guide, force 45psi in there and then take note .. (no.6 will alaways be a tad more leaner)

Yes, you are correct with the velocity stacks, and you refer to AEM tuners, are you saying that these are what cause a sudden need to fuel more, which was worrying them?(whie using the VS)

Bottom line is if you want even distribition then have the Throlttle body opposite the plenum, that will give you even distribution(well near enough) to each on of the runners, yet cause slight pressure drop ..... NA STYLEE..


Its all well and good talking away at intake manifold designs, its interesting, but I say them both on a dyno, with an equally modified cylinder head, and see what they do.

[dude]

And an EGT guage on each of the 6 exhaust header pipes !!!!

Dude:flame Dev

[Usmann A]

Yes, I would think so ... :D


Dude, car ready yet? :)

[dude]

Originally posted by Usmann A
Yes, I would think so ... :D


Dude, car ready yet? :)

Still no exhaust till next week , drove it round the block yesterday and its rather nippy !!!!, not happy with something so popped the turbo off last night :( , took 10 mins (cold engine):)

Dude:flame Dev

[Usmann A]

good to hear ... :innocent: :D

What you not happy with? I told you you've gone too small ... ;) :D

[dude]

Originally posted by Usmann A
good to hear ... :innocent: :D

What you not happy with? I told you you've gone too small ... ;) :D

Might not be a problem at Usmann , in fact can you ask Darren to phone me later !!! 07973 422272.

Dude:flame Dev

[Usmann A]

Ok, will try, :) .... but I think hes busy today, ill let uknow

[dude]

Originally posted by Usmann A
Ok, will try, :) .... but I think hes busy today,

Wont take a second dude just a very quick question !!!!, thanks .

Dude:flame Dev

[Usmann A]

Ok, I'll let him know, if I can get hold of him .... :innocent: :)

[Syed Shah]

Usmann, for the velocity stacks v unstable AFRs. I honestly don't know, and AFAIK, they don't eirther. But that is what they suspect, and to me it makes sense given the fact they are unsuitable for turbo apps, and would cause turbulence in the plenum.

I agree with the dyno being best, but flow bench figures are worth a lot too, and if they are all we have to go by, it is what I would use. I think too many people get sucked in by the exclusivity of the price, being handmade and the massive TB rather than it's design or effectivness.

[Usmann A]

Yes, Syed, I think we agree .... :D

We dont have many VS, intakes over here? And nobody has a VW either ..... ;) :innocent:

[Syed Shah]

Sounds like you made a good choice then :sly:

I prefer the Bullish one myself though :cool:

[Usmann A]

I havent made a choice ....... :D .... well not yet anyway ... :D

[Syed Shah]

:D :flame Dev

[Usmann A]

your keepinga bit too quiet ..? I have a feeling there may be something in the pipeworks ,,, ;) :D


C'mon .... reveal .. :D

[Syed Shah]

:innocent:

[Paul Whiffin]

I'll let you know how it performs next week when I dyno my car....