stillracing

First contact regarding de-cats was from mattross via a PM, so he has first reserve at the mo. Will update as and when...

Thanks Gareth - items on their way to you now.

Quickest off the mark was Gaz so he has first reserve for now! Will update as and when. While I'm at it: Item 4: Resonated de-cats bought in 2012. Never used as I didn't get round to it. These come with all fixings and gaskets. Paid £90 but I'm looking for £65+pp please. Thanks again, Rob

After a bit of experimenting with the 350's exhaust, I've decided to return it to standard. As such see the below items for sale. Item 1: Berk High Flow Catalytic Converters purchased in 2012 new from this forum. These have done less than 5k miles, and are in good condition as you can see. Looking for £275+pp for these please. Item 2: O2 Sensor spacers. Again purchased new in 2012 from this forum and fitted with the Berk HFC's - so also less than 5k miles. Looking for £12+pp please. Item 3: Exhaust Heat Wrap (10 metres long) + stainless steel 'cable' ties. Unused. Looking for £8+pp please. Thanks for looking! Rob

Looks awesome...I'm inspired now!

It all starts to make more sense once they're on a track

I would have fully agreed about the lack of passion and distinction in the styling, until seeing one in the flesh. I thought they looked a bit Korean and generic until standing in front of it, but it somehow made a lot more sense...I'm sure it would make even more sense behind the wheel!

When it hits the 155 limiter is it just an ignition cut as per a normal rev limit? But presumably it sounds soft because of the time it takes to reach 155 again!

Would like to see it if the technology behaves any time soon - been contemplating some kind of DRL project!

Having bought de-cats recently and been concerned with the possibility of running lean, I did some thinking back to my engines lectures at uni. I realised that the ECU only uses closed-loop mode (ie. adjusting fuelling based on lambda values) during steady-speed and thottle-closed events. As soon as you plant it, the ECU switches to open-loop mode to give safe acceleration enrichment and therefore uses the Nissan-set map. Hence the air-fuel ratio does not depend on the O2 sensors during hard driving. So I would say that you're safe from that point of view. This is assuming that damage won't occur from slightly lean running during closed-loop running. Hopefully it's just a case of preventing the pesky CEL coming on

I'm near Norwich most of the time. Thanks for the offer though theheff - very generous

Pretty impressive Russ! I won't feel too guilty when I hit a pot hole now then

Yeah I well imagined they're engineered properly. It was just the weight difference to stock that surprised me. It kind of begs the question what the extra 3kg per wheel is doing on the stock wheel...Although saying that it could be a weaker material.

Great link thanks trackpig. It confirms that the widely available lowering springs are much softer than standard. In terms of car performance and handling - too soft. If I do go lower I think I'll be getting custom springs made...

Evening boys. Apologies for a bit of a techy post, but I thought it was worth sharing. Having fitted Rota Torque Drifts a while back, I noticed before fitment that the Rota's are about 3kg lighter each than the standard 2004 350z 18" wheels. Pretty impressive. Intrigued about the strength of the wheel, I produced a CAD model of it and put it through my FEA software. Forces Applied I went for the absolute worst case loads, which were a simultaneous combination of: Braking Acceleration : -1.5g (gives a torque of 1703Nm) Cornering Acceleration: 1.0g (gives a lateral 'force' of 300kg) 'Kerbing' Bump Event : 5.0g applied to quarter of the car's mass (gives a vertical 'force' of 3100kg) To give a visual representation of the results (where blue is low stress, going up to red which is high): http://i1063.photobucket.com/albums/t50 ... sFront.png http://i1063.photobucket.com/albums/t50 ... esRear.png This shows that the maximum stress seen is 99MPa. The ultimate (breakage) strength of the aluminium alloy used is likely to be between 150-200MPa. So I think it's safe to say that as designed, the wheel is very safe. The horror stories of people breaking wheels probably therefore comes about either by major manufacturing defects, or misuse. Hopefully of some interest! Rob