4722 replies to this topic

[JG]

A snorkel of some kind Nev? leading into an enclosed box behind your seat with the twin filter set up?

Off topic but what is that?

where have you been?

Wonderful cars, and look fantastic. practicality is a problem though, no doors, no windows, no heater, no roof, not very much of anything actually. They also only have one clam, so damage the front and you need a new rear, and visa versa.

[siztenboots]

not very clever electrics either , they love to cook their alternator , which then fries the battery and then boom.

[GeorgeBC]

The father and daughter from stockport at le mans had theres for years so they told me, with no probs and doing plenty of trackdays. They had bags that fit in the roll over bar for storage and as long as they were moving they never got wet.

[Nev]

The job was all completed last night and now I feel as sick as a dog with man-flu. A few more pics here. Must be the first VX with an airbox in the boot !

[Judderman]

holy crap dude, how bigs the inlet pipe?

[siztenboots]

have the neighbours noticed the missing drain pipe yet

[Nev]

have the neighbours noticed the missing drain pipe yet

Not yet, but they do notice the noise when I start him up!

Judderman, the inlet pipe is 4", my best guess is that this improvement and my new airbox will add 10 to 30 BHP, and also inlet air temps will be lower which in turn helps keep power higher as ignition timing can be kept advanced more.

[siztenboots]

be interested to know what the difference is for the induction noise , less noise and better filtration is my motive to bin performance cone filters and go paper panel

[Nev]

be interested to know what the difference is for the induction noise , less noise and better filtration is my motive to bin performance cone filters and go paper panel

Also Steve, another advantage is that the inlet pipework no longer gets heated by the turbo + manifold, frees up space in the NS ear for oil coolers.

[garyk220]

If you are planning to use the exiting rear boot vents for cool air, are you not risking mixing this with the hot exhaust gases into the intake? Pretty sure the cfd plots for airflow from the rear show a lot of turbulant air flow recirculating from under the diffuser and stalling in the area at the rear of the boot. Chances are, on a wet day you could find as much water and crud being sucked into the boot mounted airbox as you currently get through the near side rear?

[CocoPops]

Looks like a beehive

[MrSimba]

Where's the cold air feed into the boot coming from Nev? Are you making external bodywork mods?

[siztenboots]

I'm guessing cold feed might be something similar to nissan bluebird boot vents

[Nev]

Looks like a beehive

Yea it does a bit and also because it is predominantly pale in colour you can clearly see it inside the boot when looking at the rear of the car. Once I have eliminated the MAF I will reposition it with a shroud and black it out.

As for cold air getting to it that is not a problem as the back of the clam has large cut outs that can suck in ambient temp air. Also, I could just cut a hole in the OSR side of the boot tub and that would get air directly from the rear wheel arch.

As I am feeling a bit better from my recent bout of man-flu I might get to actually drive it today (assuming the rain gods are smile upon Bristol today). I am keen to see what difference there is to the way the engine breaths. The next/last bottle neck is the exhuast system, really this too needs to be upgraded from 3" to 4" to finally allow the engine to work at maximum efficiency.

Edited by Nev, 13 October 2012 - 06:36 AM.

[MrSimba]

yep nice to get rid of the MAF with standalone

[CocoPops]

Any chance of sorting your blog out to be a bit more readable.... Update 200007, part one hundred and seven, 20:00...... Etc its becoming a bit hard to see what's going on. Just some constructive feedback to help

[luke.]

Nev what gains are there to be had with 4" system? And also was chatting with mrsimba and he mentioned you still have a cat. Isn't this restricting you at all?

[Nev]

Managed to get out, but loads of traffic and wetness everywhere so only took it to 6000 RPM, however, even with that it is obvious that the car is breathing better. The first 10 miles caused the ECU some concern I expect, as there were plenty of pops and bangs in the exhaust which I normally don't get. Anyway the auto adjusting fuel tabs sorted that. One noticable thing is that it seems to have slightly better road manners (ie pick up + steadness of throttle), I think this might just be fluke positioning of the MAF or simply because I sprayed the MAF filament with brake cleaner and it can now work better at measuring air accurately. I also have a boost leak at approx 15 PSI in the chicane of pipes that lead to the TB (identified by a high pitched squeak). I have since come back and tightened up the bolts on the clamps that are probably letting this happen and await the roads to dry out before I go for a full beans test.

Edited by Nev, 13 October 2012 - 02:40 PM.

[Nev]

OMG

Just went out early this morning in the car to test for the suspected boost leak from my new pipework and had an eye opening drive.

Whatever I have done has changed the way the car picks up and delivers power quite considerably. The drivability was noticably improved/smoother and power was certainly up (partly cos of the cold air) - goodness knows by how much, but I wouldn't be surprised if it was making 530 BHP or 550 even. At one point I booted it in 3rd gear and the front of the car lightened off so much it felt like the front wheels were coming off the tarmac. I backed off the accelerator in a panic as this hasn't happened before and was unexpected. Would love to take it back to CS and get it re-dynoed briefly just to see what proven difference this mod has made, sadly however they are far too far away.

As for the suspected boost leak, I think the squeeking noise is just coming from the compressed air squirreling its way down my cobbled together 'bits and bobs' boost pipe which has lots of joiners and sticking out edges that will cause turbulence (and noise). I should really get my local fabrication man to come round and build a hard pipe to replace it and smooth the air flow more, this would likely stop the noise.

Am off mountain biking now, but can't wait to get back tonight to give it another blatt when I go down to meet some car nut friends. Honestly, the experience is addictive. Anyone sitting on the fence about whether they should go for big power in their VX should commit if they can afford it - it really transforms the car into a viceral experience. I'd be more than happy to build them up a suitable engine too as I'm bored without much left to do on Nipper.

Edited by Nev, 14 October 2012 - 08:13 AM.

[chris_uk]

Get some vids!!!