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H-Dev 350Z build


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#1 jez@H-Dev

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Posted 12 January 2012 - 09:37 PM

I thought I'd start a thread about our 350Z - just to show what we're up to.

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A bit of background: Our 350 is a 2004 UK GT model and was bought as a cat-c write off from a friend of mine

The car had hit a post while traveling along the motorway - the post went through the air con radiator, the engine coolant radiator and smashed a hole in the sump.

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Luckily the body work and everything else under the car wasn't damaged at all. So all we had to do was to find and fit a replacement engine. Pretty straight forward.

This is the replacement engine - just a completely standard VQ35DE

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We're going to be tracking the car so main priorities are sort the brakes out, get the suspension uprated and try and get the weight down.

I'd already tried some Performance Friction 01 pads in our other 350 and they were exceptionally good. The only down side was the amount of dust they produce and the cost - they're very expensive. This time I though I'd go to the other end of the market and try some yellow stuff pads. Although these weren't as good at the PF pads, they actually held up really well on track. And value for money wise they'll be tough to beat. They do tend to wear the disks quite quickly, but as we're only using fairly cheap standard discs it's not too bad.

We fitted a set of Racing Logic coilovers - these aren't a very well known brand but we wanted to give them a try. They're actually very good for a fast road car - I'll probably end up swapping them out later on for something stiffer and more track focused.

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We fitted Superpro full alignment kit - this totally transformed the handling of the car - strongly recommended.

Superpro kit:
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Some rear bushes fitted:
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Old bushes:
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As well as using the car on track, we also use it to develop products. We've tried and tested our grounding kits, de-cat pipes and plenum spacers. I've also remapped the car using the Uprev system. Just these mods took our car from 279 to 309bhp - which is around +11% - not bad at all for an NA engine.

We've also fitted an oil cooler:
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#2 jez@H-Dev

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Posted 12 January 2012 - 09:37 PM

We currently are testing some H-Dev high flow cats - at the moment they don't fit properly (they hang too low - see pics) - when this is sorted and we've checked that the car will pass an MOT they'll be available for sale. Our current supplier is messing us about at the moment so we don't have a lead time yet.

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Next up is to get some weight out of the car. As standard it weighs 1471kg - bloody heavy

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We've started to strip it - it'll be getting a full cage soon. We've also got bucket seats to go in and will probably go for a carbon boot and plastic windows. I'm hoping to get around 100-150kg out of it. Not sure if that'll be possible yet though.

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I'll stick up more pics as we go - Kyle is fabricating mounts for the bucket seats at the moment. When they're fitted we'll removing all the interior bracing and fitting a full weld in cage.
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#3 Paul_S

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Posted 12 January 2012 - 09:52 PM

Wow - this looks like a thread to watch :teeth:

Great stuff so far. I hope your mate was OK!

#4 paul_k

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Posted 12 January 2012 - 10:04 PM

Looking good Jez

Yellow stuff pads have not gone down very well after about 30 minutes on the GTR but a lot of Scooby / evo guys love them on the track.
Have you done more than 40 minutes on track with them?
Dynos show useful gains!

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#5 jez@H-Dev

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Posted 12 January 2012 - 10:18 PM

My mate was fine luckily - only damage to the car.

You'd need a serious brake setup to go flat out for 40 mins. The max I've been out for has been around 10-15 min sessions. For that the yellows are good value for money, but certainly not something I'd recommend for extended periods or for use on cars with stickier tyres or with a big power increase. I'll probably get a big brake kit sorted at some point - hopefully save some weight too
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#6 JimmyM

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Posted 12 January 2012 - 10:28 PM

I'm liking this, top job so far guys,pretty good hp gain too. :thumbs:
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#7 djtimodj

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Posted 12 January 2012 - 11:29 PM

Oh im loving this so far! Keep the up dates coming! :kicking:

#8 MaDMaXX

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Posted 15 January 2012 - 07:58 AM

Do you have any suggestions for a road driven car that will maybe get one track day a year, low dust desired... :)


Also, interesting power dev from those parts, subscribing to this thread.
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#9 jez@H-Dev

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Posted 15 January 2012 - 01:53 PM

The DS2500 are popular. Or you could try the Cosworth street pads - I've not tried them myself but they're sposed to be good. Both in stock :)
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#10 jez@H-Dev

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Posted 18 January 2012 - 01:40 PM

Got the seats mounted:
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And striped some more interior:
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Its booked in for cage fitting next week :)
www.h-dev.co.uk

#11 Paul_S

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Posted 18 January 2012 - 04:54 PM

Looking good! More like Tim's each day!!

#12 paul_k

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Posted 18 January 2012 - 06:19 PM

I'm guessing the seats sit lower in the car and probably save 30Kg already...
No aircon at the track then!

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#13 djtimodj

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Posted 18 January 2012 - 06:27 PM

Oh how I remember removing the metal work in the back end! Lol. Pain in the a** just with hand tools!! Ha. Keep it up mate can't wait to see the cage!

#14 jez@H-Dev

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Posted 18 January 2012 - 11:35 PM

Kyles been removing all the metal work - very hard work.

It's down from 1471kg to 1290kg now - but that with no seats, dash or cage. We still have to remove the air con matrix, compressor and radiator, window motors and rear windscreen motor. Also probably going to go carbon boot and plastic windows. Hopefully it'll remain below 1300kg when its track ready.
www.h-dev.co.uk

#15 carlswift

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Posted 28 January 2012 - 10:33 PM

Hi, you still got the damaged engine?

Torque required, not bhp......

#16 jez@H-Dev

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Posted 29 January 2012 - 04:28 PM

No, fraid not - well, I've got bits of it left. Probably going to rebuild it later on.
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#17 JimmyM

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Posted 29 January 2012 - 04:38 PM

Looking good so far, i agree with Tim...........can't wait to see the cage installed. :thumbs:
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#18 jez@H-Dev

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Posted 15 February 2012 - 04:45 PM

Got the car back from the cage fitters yesterday. Got the chap whos going to do the painting coming round tomorrow to give me a quote. Here some pics if it so far:

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#19 paul_k

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Posted 15 February 2012 - 05:04 PM

How much did the cage weigh out of interest?

I thought there was a ruling about the A pillar had to be straight? could be wrong though.

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#20 JimmyM

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Posted 15 February 2012 - 08:09 PM

Thats a neat job done with the cage, like it :thumbs:
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