stevie1982

iTrader: (16)

just a quick one i hope to be taking my 05 t25 on a track day soon at bedford and was wondering anyone who has a type 20 / 25 and has the 2.5" miltek system fitted as standard to them, can you tell me what was your static and drive by results, do you use a bung etc

cheers

decepticon

hi mate, 2.5, 3"milltek and 100 cel sports cat and i got 94db static at snetterton race track.
enjoy the track day, its the best place for a t25

stevie1982

iTrader: (16)

cheers mate that was on the 3" system then

so 94db static but do you know what it was on the drive by monitors?

just i saw on litchfields website about the miltek exhaust bung and was just a little worried that they need the bung to keep to the noise restrictions

ssssss

did a track day in my t25 at goodwood this year 93db at 4800rpm in the pits giving it the full beans on the track not a problem at all the limit on the day was 98db so you should be fine if you havent done anything to the induction seems to make a difference for some reason

T5NYW

iTrader: (4)

Sorry static tests are only a guide at Bedford Drivebys is what counts, Bedford is one of the strictist Tracks in england over noise

and my T20 driveby is between 102-105db on full chat and it WILL NOT pass at Bedford.

Nornally PPP scoobs pass there OK but one had an induction kit on and that noise triggered the on track noise meters, black flagged and of home

IIRC

IMHO you WILL definatelatly need a bung and even then may only just pass the driveby
Tony

T5NYW

iTrader: (4)

they will do a midweek driveby test for your car if you want one check the bedford website,

Remember even If you pass the the static its the driveby that counts

Shaun

If your static is as others above, I will eat my hat if you pass the driveby at Bedford!

stevie1982

iTrader: (16)

bugger i cant get up there in the week as its not the shortest drive.

i took my p1 there in the summer with a full 2.5" decat and a p1 stamp'd back box and that was fine at bedford

so i was hoping that the sports cat, and i think they have the resinator in the middle along with the back box so i thought it would be ok.

so you guys think i will have a issues come on the day

Shaun

Probably.... but you never know, you may be absolutely fine.

The main problem with your set-up is the twinscroll headers.... these can cause massive problems with noise in their own right.

apac

iTrader: (2)

I made 94db's static at 1 metre at 4.5k revs - Castlecombe this summer. With a miltek sports cat system on my JDM 2003 Spec C(twinscroll setup). - it's effectively a type 20 without the badge I got given the bung when i purchased the car but was told by the previous keeper that it had never been needed on any track.

stevie1982

iTrader: (16)

i dont think the static test is the problem, it is the drive by which is where it will fall over

i have had an email from iain saying that it will fail so looks like it is off


bloody shame, i guess i can try and get in touch wityh the track and see if i can go up one saturday and have it tested.

so i will let you know

cheers

T5NYW

iTrader: (4)

but Bedford the Static is just a Guide and the DRIVEBY is the one that will send you home.

Bedford Auto drome is the strictess Track in the Country for noise regulations. most Tracks only worry about the static Test or give you a warning to short shift

i bet he had never taken it to bedford though Due to High rev VTech motors most are using either 75% of full RPM so now 6Krpm

As said get a bung and hope it passes OK just remember if your borderline it mail still fail on another day

IMHO IIRC

Tony

T5NYW

iTrader: (4)

FPMSL although they sometimes do "Noisey" days normally expensive as classed as "Testing days" rather than "Track" days but limited amount of days per year and car on circuit

I agree and 8krpm wont help,

My mate had a UK PPP'd Scoob fail at bedford and that was due to an induction kit He put the std airbox back on and passed OK, it also went better

apac

iTrader: (2)

Doesn't sound like much fun at Bedford

T5NYW

iTrader: (4)

It definately not with a noisey scoob

But a fantastic safe circuit and great Facillities They and the can add water to the Track on one Corner to add a bit of spice to your drive

IMHO

Shaun

Interestingly..... mine has been 90db static all year (tested at five different events) since the latest engine build and new Tracktive twin to single scroll up-pipe. It was 102db static last year on the previous engine build and up-pipe. The last 90db static test was done at Snetterton three weeks ago.... and that was at 6200rpm! I have the Miltek system.

I spoke to Tracktive about this and Richard Bulmer suggested it may be down to a mixture of his up-pipe and cam swing changes that have been made on the new build.

Not sure I can find the ***** to try the ultimate and take it to Bedford.

apac

iTrader: (2)

the miltek is a very civilised system, probably the most civilised bit of my Spec C

stevie1982

iTrader: (16)

I think I will book a time to go up and have it tested
on their meters to see where I stand and let you know where it stands as
there is mixed opinons at the minute but thanks to all fr your help and advice but I do say once I have the figures and if it does fail and depending on what those figures are f they are to high for bedford and other tracks limits I think I will be selling up and buying another scoob that I can use as a track day car

stevie1982

iTrader: (16)

right booked in for this saturday to go up and get it checked so i will let you know the reuslt

Shaun

I won't get the salt and pepper ready for my hat, just yet!

ssssss

on most trackdays they tell you where they will test the drive by db test that is a clue to say if your car is a bit over on the track ease off the revs when you drive by them

T5NYW

iTrader: (4)

best way if your over buy a Bung and retest it that should sort it and the jobs a good un

I have done in my Type20 -: Donington, snetterton, castle combe (Japfest, rallyday and trackdays), sliverstone (trax and Trackdays), brands hatch, mallory park, Oulton Park, Prodrive warwick Trackdays, Curbourgh, kemble airfield, york raceway and Bruntingthorpe without any problems

Altough I did have an issue at Donny Time attack day!! even the norris evo had to fit a funny exhaust, i think they were just being arsey

I did do Bedford on the fateful noise issues Trackday Feb 2003 which ended up with the everyone in the SIDC getting banned from Bedford. I did go to first SIDC trackday after the ban was removed in Feb 2005 but that was in a UK PPP'd scoob

IIRC IMHO

Tony

stevie1982

iTrader: (16)

cheers for the heads up tony, i appreciate it. i will see what happens tommorrow.

sorry you may of said but what miltek system you have the 2.5 or the 3" system and do you have the centre resonator

stevie1982

iTrader: (16)

Right then

went to bedford this morning to have the car sound checked, and a big thank you to the guys from motorsportvision who were running the open pit lane day, they took the time out to help and show me how it was all done etc.

as for the results

on a STATIC test run at 5000rpm it failed at 102.6db

i asked if they had the time if they could do a drive by and the result was

DRIVE BY 87.1db so it passed by 0.4db but they did say that wind direction and on another day it may well go over the limit and fail.

i am really stcuk now on what to do, i could go and just hold back and short shift and hope to get away with it all day.

i was thinking and not sure if this was possible, but could i possibly fit a standrd 2005 STI rear back box or maybe the PRODRIVE back box just for the day, as i would hope that it would help lower the DB's due to being more restrictive etc.

would that be a possiblility?
would it cause any problems to the engine / map etc?

guys any help would be really helpful, as i am not the most experianced driver and like bedford as there is plenty of room to get it wrong.

thanks

T5NYW

iTrader: (4)

As i suspected

Very suprised much Lower than I thought but I would agree may fail anotherday or if you where to really give it some beans, not worth the risk, get a bung.

Not certain If yours is a 21/2" system a prodrive one would bit but wouln't fit a 3" miltek.

IMHO would FAR better to buy a BUNG for it, it takes two small holes drilled in the backbox exit pipe then 30s to fit on or Off Jobs a good un

Iain might be able to source one for you. There are companies that make bungs, not certain if there was a link on the Snetterton Web site??

Short shifting aint the answer

It may not go quite awell but I'm not that knowledgable in this department

Yes PLENTY of runoff everywhere now a few years ago put the "Bustop" in after a straight to slow peeps up and then removed the only bit on armco barrier

IIRC IMHO

Enjoy

TimH

iTrader: (11)

Bung should be readily available from Iain Litchfield

T5NYW

iTrader: (4)

Tim you beat me to it

Here is a Miltek bung about £90

Litchfield

stevie1982

iTrader: (16)

i have the 2.5" system mate, hence the thought that the change of backbox may help to lower the noise as long as it will not cause any issues to the engine etc then i dont mind.
i just thought that the standard sti box is quite quiet, just it may be to restrictive and possibly cause problems, so if anyone could shed some light on that?

the only thing i would assume is as you say it wont go as well but that is not a big one.

i spoke with iain about the bung for the miltek system and it is a bung that redirects the noise but the problem is the tracks have the meters on both sides so there is no getting away from it.

just i would like to get a few more in to get some confidence / experiance up before going else where

TimH

iTrader: (11)

Didn't think Milltek/Litchfield did a 2.5" system? I know they did a 2.75", but 2.5"?

T5NYW

iTrader: (4)

I would say that you did pass the driveby so a bung would only make it quieter

The exit pipe is normally 4" could try a cheaper option first

TUNABLE EXHAUST BUNG/ INSERT - 4" / 4.5" / 5" TAILPIPES on eBay (end time 27-Nov-09 09:44:47 GMT)

Tony