longsh07

Generally no, unless the wheels and tyres have been changed too far from stock sizes. Even then it's still working properly but the difference upsets the system making it cut in when not really required. 

Are you on stock wheels and tyres sizes?

18x8 et30 225/45/18 front

18x8.5 et33 245/45/18 rear

Your description sounds like traction/stability control to me, as Ekona has ready mentioned. Sorry but I have to agree, I think it's your driving style at fault rather than the car. 

You said you've not had this is other cars, what were the last few cars you owned?

Just now, Jay84 said:

Honda beat

That's the one!

Go!

Noble M10 

1 hour ago, davey_83 said:

Ginetta g40

 

My mates lad races in the series 

Unbelievable 

I thought that was going to last more than three hours!

EDIT:

How about this one 

Ferrari F355?

Abbey Motorsport @Mark@Abbey m/s or Horsham Developments @Jez @ H-Dev

Both shouldn't be too far to go for you.

Edit: there guys could could do the whole process for you too, supply/fit/remap.

Any cat back system should work with any direct replacement cat, high flow cat or decat pipe provided the flanges and location match that of the stock system.

I have the Milltek system fitted to my car and that fits up fine with Berk and Cobra HFCs as well as stock cats. 

Whatever you do you'll need a remap to actually see any benefits from replacing the exhaust (noise excluded of course)

Manifolds are apparently a pig to change even if you can get them off but there are options available.

Aftermarket high flow cats or decats are available too. If you go highflow, its pretty much 50/50 chance of getting through an MOT even if you get them red hot. I've had two different pairs and my car will just not pass emissions with them fitted so went back to stock cats.

Can go full long tube headers which will remove the cats but not leave you anywhere to refit them.

Stillen make some nice looking standard headers, while Berk, Cobra, and a few others make highflow cats.

Speak to any of the traders, @Tarmac@TarmacSportz @Ewen@Clark Motorsport @MITZ@CougarStore @Adrian@TORQEN , they can sort you out with your options

VW Corrado?

8 hours ago, Adam87 said:

Thanks for the tip I will give them a look, if you say they look after loads of the members here then that makes me feel a bit better, would you happen to know any rough prices

of what they charge for anything ??

Not got anything to hand mate, sorry. Drop them an email or give them a call, they are pretty good at coming back with prices quite quick.

By the way, might be a bit of a trek around the M25 but highly recommend a garage in Kings Langley called Japex Automotive. They look after loads of club members cars and Willbe honest and fair with you if you need help with anything

13 minutes ago, Adam87 said:

Yes I have been told it is repairable and that once finished I wont be able to notice that its had bodywork. And yes it is the cheaper option to repair it, but with what

type of car it is I don't particularly want to do things on the cheap if you understand. This was my dream car for years and I want it to be perfect. Someone I know said

they could repair the damage for £900. But if I was to have new panels it would come to £2000.

 

 

I think £2K is about right for getting that fixed, could be worth getting a couple of quotes even if it's for peace of mind only.

Location of damage does suggest the impact caused the fuel gauge problem. Fuel tank is a saddle bag style and is around that sort of area. I doubt the fuel tank is damaged but the shock might have knocked the level sensor or other associated electricals loose.

Genuinely interesting explanation, but never seen anyone explain science with so much shouting 

RACING! 

Sorry to hear that, hope you're all sorted after that accident. As much as I hate to see a banged up 350Z, people are far more important!

Anyway, knocking from front end is usually related to tie rods / drop links / ball joints. I'd guess at tie rods if you say it cracks while steering. Where did you take it to get checked?

Clicking rear end is fairly common problem, plenty of info available online for that one. Here's one example:

Which fuel gauge is going haywire? The one on the little screen in the three gauge cluster or the needle on the dashboard? I don't know much about how this works but sure someone will be along shortly to help

As for advice for repairing the car, probably worth speaking to your insurance about it in the first instance and seeing what they suggest. If the accident is exactly as you said then chances are you wont be penalised for it and they will sort your car if fully comp.

Finally, on exhausts, if you are after something fairly standard like then you cant go wrong with a Milltek system. If your after something a bit more beefy then Cobra or Invidia are good options  Any of the traders on here will be about to sort you out with something to meet your needs!

TL;DR: 

I've spent far too long on this now and basically gone of a crash course of fluid dynamics 

Q: Do performance filters increase power?

A: Maybe? There are so many factors involved that even if they do, the difference is likely so small, or could be accounted to changes in air quality, you wont notice it anyway . 

----

Don't supposed you have torque/power figures do you? Only because @burntorange asked about the power increases rather than airflow, though I fully appreciate why this is relevant.

Would be nice to get a solid answer out of this.

Anyway, I went away and read up on AFR, torque, horsepower, air flow, etc etc etc to try and help. 

Now if I've understood everything right and we forget all other cars and just focus on the 350Z.

• How much air can fit in one cylinder is always going to remain the same, however the quality of that air will vary.
• The velocity at which air travels into the cylinders will depend on RPM, how wide open the throttle is, intake piping, air filter, and even how the exhaust gasses exit.
• The density of oxygen within the air can change based on air intake temperature / humidity / pressure.
• The 350Z uses a MAF sensor to measure mass airflow (which accounts for air velocity and density).
• MAF sensor produces a specific reading, ECU fires injectors for specific length of time based on this (to add x amount of fuel) to meet target AFR.

Based on that, if you fit a less restrictive filter / intake then the velocity of the air may increase which seems to be the source of any power increase. The MAF sensor then responds to this and injects more fuel, causing the car to run richer and therefore producing more power.

This also explains why, generally, induction kits produce more peak power at high revs at the cost of low end torque.

To pinch an example I found elsewhere:

If you were to breath through a straw while walking slowly, you'd be able to breath fine. If you then started running while also only breathing through the straw, you'd struggle to catch your breath.

If you were to replace the straw with a larger straw, you'd still be able to breath fine while walking but you'd also be able to breath much easier while running.

Now imagine while breathing through the larger straw, you making a sharp intake of breath (sudden wide open throttle), while the volume of air you receive would be the same as before, the velocity would be a lot slower.

To put it into car terms, a less restrictive 'performance' intake means that at high RPM you can breath more easily, but at lower RPMs when you want to accelerate hard (sharp intake of breath), the velocity of the air is going to travel into the engine slower because there is less restriction and therefore less pressure to pull the air along.

The venturi effect explains this as velocity must increase as it passes through a constriction.

I believe this is why velocity stacks work so well for our cars  

27 minutes ago, SHEZZA said:

As It would happen we have a Club meet here this year at the British motor  museum, get your name down as there’s 12 spaces yet to fill. 

 

 

Ah nice! I'll see if I can make it  

Hi Adam,

As others have said, you've come to the right place. 

Let us know what we can help with  

Guys, make sure the name of the image you upload does not have the make/model in, otherwise the URL for the image gives it away 

Just a thought: https://www.britishmotormuseum.co.uk/plan-your-visit/visiting-as-a-group/motoring-clubs

Mighty Car Mods held a meet there once which was pretty good!

Just fitted mine at the weekend. Went for the Nismo spoiler version despite not having a Nismo spoiler. Added bonus, the boot pops itself open properly now! No more double pressing.

You'd probably be best of buying direct from SGS though surely? Doubt these come up very often...

https://www.sgs-engineering.com/car-boot-tailgate/nissan/350z

Probably getting a little off topic now but how did the various filters affect the target afr? Id assume that more airflow would cause a lean condition until it's been dialed in properly? I know stock ECU is a 'learning' unit, I assume uprev maps would remove some/all of their learning and use the programmed map table all the time?

I'm not hugely familiar with mapping but I get the basic principles of it so you might need to bear with me

That's interesting, how does this translate to power / torque gains/losses with standard map? Were you able to check this at all?