JamesDundee

iTrader: (2)

Right then,

I'm booked in to do Oulton Park on November 4th, I have a Widetrack STI with PPP, and a Blitz Nur Spec R exhaust. I know Ive no chance of passing noise testing with the current set up.

Now I was getting stressed about getting sent away from the track day before it had started. I managed to borrow a soundtester/decibel-meter from my old man's work. Got him to stand behind the car 0.5m away at 45deg, held it at 3/4 revs and got approx 100db.

I then fitted the silencing bung, repeated the test, and got......................100db

Anyone recommend a decent trackday friendly system for not a lot of cash? As I'm immature and would still like to run the Nur Spec on the road.
My other option is the get a silencer box made up at a custom exhausts place with a downturned tip, and mount it AFTER my backbox, along the rear bumper at 90deg to the normal exhaust direction.

Like so:



Or even a plug in silencer, like this:

http://www.actproducts.co.uk/product...racerbera-2-5/



Help!

peter zippy reid

iTrader: (25)

Revolution system should be track friendly

YE5 1 SUB

iTrader: (2)

i have done oulton in my newage,i have gt spec headers and rcm system and that past easily,in my classic i had a bung in and it spoilt my day at donnington as it held back i thought.have you tried a resinator in centre section?

JamesDundee

iTrader: (2)

Hmm I dunno now. I've never tried a different exhaust I bought with the Nur Spec on it and the prodrive exhaust in the boot and sold that on. I'm worried as I don't want to get sent home but I don't want to buy a new exhaust if I don't need to!

YE5 1 SUB

iTrader: (2)

its only a static test anyway,could you not get a db reader or even the app on ya phone to give you a gestimate of what your over by?tbh the right bung (muffler)may work as long as its the same size bore as the exhaust.

JamesDundee

iTrader: (2)

That's what I did. I have a bung with an approx 1.5" hole in it (pretty restrictive) and it's still over. There's also driveby tests.

jura11

iTrader: (7)

Hi there

Please have look on DB killer,I know friend used this on his Nur spec with great success or as above Revolution exhaust is best and we are used same and has been OK,just stay away from Buddy Club Spec IV,its very loud exhaust and Nur Spec is against this exhaust just very quiet exhaust

Thanks,Jura

JamesDundee

iTrader: (2)

Thanks Jura I'll look into them! All the ones I can find are for bikes...

stevemoir

iTrader: (24)

Miltek will defo pass track day regulations pm me if your interested sure we can do a deal

Thanks

Steve

PlayFair

Just hold your foot at 50% not 75%?

That's how i got on to tracks with my 350z japspeed k1.

JamesDundee

iTrader: (2)

Yep I tried that with the sound tester. Held it at 3000rpm, still was 100db. Plus theres the driveby sound meters on track.

YE5 1 SUB

iTrader: (2)

Try getting a tail pipe and pointing at the floor like a deisel.the sweedish have done this for a long time now.but keep it the same bore as the exhaust for restriction purposes.oulton was 105 when we went and they wernt to fussy if just over the db.that was with javelin

JamesDundee

iTrader: (2)

Ah I'm with javelin too! 105 standing? That's well loud! I can get a tip made up no problems

Mr Blobby

Just try and buy a prodrive or standard back box? unless your running over 400ish bhp you don't need it to be a 3" pipe i think?
when I go on a track day I just pop on my prodrive exhaust instead of my Afterburner one.

scooblet

iTrader: (5)

Miltek 93db at castle coombe. Or cobra trackday system

JamesDundee

iTrader: (2)

Looks like I was wrong and it's 105 standing and 95 driveby. Reckon I'll manage it with the bung?

JamesDundee

iTrader: (2)

Problem with getting hold of a standard backbox is that it won't mate up to my centre section!