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Old 10-22-2015, 01:04 AM   #43
Chad86
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Thanks guys

Quick video from a drive out tonight, unfortunately the camera phone and YouTube compression does it no justice

This is definitely how a proper GT86 should sound!

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Old 10-22-2015, 08:29 AM   #44
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This is definitely how a proper GT86 should sound!

And that's only up to 5k rpm with the current limiter I've got on the car
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Old 10-23-2015, 01:08 AM   #45
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And that's only up to 5k rpm with the current limiter I've got on the car
Awesome! How are you enjoying the low end torque from the 335 so far?
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Old 10-23-2015, 10:13 AM   #46
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Awesome! How are you enjoying the low end torque from the 335 so far?
Not mapped properly yet remember. But it feels like I've got the 210 kit on and we've only got a moderate map so no idea how this is going to feel when it's done

Finally booked myself into an exhaust fabrication place on 9th November so mapping will be done around 16th November
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Old 10-30-2015, 05:51 AM   #47
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Picked up a Perrin 3" cold air intake for an absolute bargain from an owner in the States selling on the Facebook group



Brand new these are around £300+

Managed to get mine for $230 delivered. So around £150 - guy had no need for it and it's still new in the box
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Old 11-02-2015, 04:20 AM   #48
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Pure sex, I'm so jealous!
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Old 11-03-2015, 11:15 AM   #49
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Pure sex, I'm so jealous!
Haha cheers bud

Car is now having the headers, overpipe and front pipe custom built at the fabricators, ready to be picked up on Friday 13th
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Old 11-05-2015, 06:46 PM   #50
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Couple of pics from a meet the other week





And then an evil front end shot from a meet last weekend



Missing her at the moment
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Old 11-07-2015, 02:53 PM   #51
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Haha cheers bud

Car is now having the headers, overpipe and front pipe custom built at the fabricators, ready to be picked up on Friday 13th
What was your reason for going custom fab rather than full JDL like the route I am going?
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Old 11-08-2015, 11:06 AM   #52
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What was your reason for going custom fab rather than full JDL like the route I am going?
I wanted a 2" bore on the header so that was always going to be custom. The overpipe and the front pipe weren't much to add onto my spec so thought I may as well get it done

That way I know the system will be exactly what I want and it actually works out a bit cheaper than buying off the shelf
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Old 11-13-2015, 06:14 AM   #53
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She's finally done!

Will at JP Exhausts in Macclesfield just gave me a call to say it's finished and that he's just emailed me some pics. Ready to collect her tomorrow!

I can't thank Will and JP Exhausts enough. Every step of the way they have listened to the spec I wanted, kept me fully up to date and gone far beyond what I ever expected if I'm honest. Will has even gone to the trouble of rebuilding part of the catback exhaust where I'd flattened the pipe into the backbox from the car being so low - he's raised the pipe up as much as possible and even stuck a 5mm plate on the bottom to stop it crushing the pipe in future and making sure it stays a 3" bore

No manifold that I know of for the GT86 has a larger bore than 1.75" on the primaries - I asked Will if a 2" was possible and he's somehow done it! It looks amazing, such a shame you can't really see it unless you're under the car this large bore will allow us to get as much as possible from the supercharger

The main concern was noise - the catback itself with the old 1.5" bore manifold and 2.5" overpipe and front pipe was LOUD. Will has managed to squeeze in 2 huge silencers to the front pipe which will considerably help reduce the noise. Not the prettiest front pipe in the world with the 2 big boxes stuck in there, but it had to be done if I wanted any chance of getting on track

So, a few pictures...

Manifold - 2" bore in a 4-1 design finishing in a 3" collector





It's not quite as unequal as the old Borla manifold was, simply due to the fact that the larger bore means you can't make the shorter side the same as the Borla because of the angles...it's still unequal so will have the Scooby rumble, but just maybe not as much as before

Fitted to the car, it looks amazing!



Overpipe - there are only a couple of 3" overpipes on the market for the GT86. This connect the manifold to the front pipe but has to go over the front subframe and 3" is a REAL squeeze. But Will has worked his magic and done it without any issues



Front pipe - 3" bore with 2 massive silencers to give me a chance of passing the noise test on track



Not much room with those boxes in place when it's on the car...



And finally, the remade catback pipe that I didn't even ask for Will to do anything to! He's rebuilt about a 3rd of this to raise it up slightly, completely free of charge and the 5mm thick plate will help to keep it 3" if I do bash it again







I haven't even seen this work in person yet but I'm already so impressed! Really can't wait to pick it up tomorrow and see what a difference it makes to the sound. I think I still may need some sort of bungs on the tailpipes to make sure I'm track legal, but that's easy enough as the tips of the exhaust are held on with clamps, so I can just clamp the bung onto the actual pipe from the back boxes

I'll get some videos over the weekend and then it's into Abbey on Tuesday 17th ready for mapping!
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Old 11-15-2015, 12:43 PM   #54
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Yesterday I got the train up to Macclesfield from London to pick the car up. The first start up was louder than I expected, but then it was a cold start and I've been used to driving a diesel around for the past 2 weeks...

A quick fill up before the 190mile drive home in horrible weather conditions



Luckily there was zero traffic and I was home within 3 hours. The exhaust does drone a little on the motorway, I don't think there's really much we can do about it...whilst the exhaust sits at around 95dB holding it at 4500rpm, under load it's WAY louder and no chance of passing the flyby noise limits on any track. So I think we're going to try out some aftermarket bung to stick into the pipes coming out of the rear boxes and see if that helps

Today was then spent fitting the final mod before the full map gets added by Abbey on Tuesday - the Perrin 3" cold air intake



Not the easiest intake to fit, as it means removing the front bumper



Remove the old airbox



And the HKS air duct comes off too



Leaving a big hole in the engine bay, but it just means you can see a bit more of the beautiful manifold





Fitting the Perrin CAI also means removing some additional bolts that hold the radiator fan and bonnet catch bracket, to then slide the pipe underneath, keeping the filter away from the hot engine bay as much as possible



No real noticeable gains yet obviously but I'm sure it will help once it's on the dyno later in the week
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Old 11-17-2015, 11:33 AM   #55
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Car dropped off to Abbey Motorsport for mapping this morning. Eagerly awaiting results when I pick her up on Saturday!
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Old 11-18-2015, 07:43 AM   #56
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Mapping was supposed to be today but I've asked Mark to delay it until tomorrow so that these can arrive





Not the prettiest thing in the world but it should reduce the noise considerably so that I'm track legal - there's not much else we can do to make this system quieter so this is the best and probably only option

Whilst they promote a "straight through flow" design, it will still affect the back pressure ever so slightly, so it's worth sticking these on and getting Mark to produce a "track" map for me
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