BEC at Bedford?

[R1 Indy]

I'm looking to book my second trackday with my R1 engined 7.

I did blyton park last week, but annoyingly they didn't do any sound checks (was hoping they would so I know how loud I am)

I would like to book Bedford autodrome, but am a bit worried about the 101db test.

I've got a 6" by 25" can, which is reasonably quiet, but when revved past 9K it does still sound quite loud to me, but not sure of what on a DB scale?

I've got a pipercross PX600 air box, so induction noise should be ok.

I suppose I could fit one of those DB killer things, but wold rather not as they add quite a restriction and increase engine temps which is not good.

So does anyone have any experience with BEC at Bedford.

Does anyone have any advice?

Cheers

[GreigM]

you might struggle - bedford are notoriously strict and most BECs struggle to pass 105db days....definitely worth investing in your own db meter to get an idea

[Danielj1000]

I have a vague recollection that when someone else asked a similar question, it was suggested that they contact their nearest track, as they may let you turn up to a track day you're not booked onto and go through the static sound testing to get a reading. I guess it is in the circuit's interest as they may get your future trade and also because failures are a hassle they'd rather avoid.

MSV are generally pretty helpful, I find, so you could give them a call. As you'll know, the sound tests are usually done between sign on and briefing (7.30 and 8.30 am).

The Track and Tour event at Bedford on Saturday 17 August that I am going to also has an 87.5db drive by limit, so I guess you would still have to consider that too.

[pikeyboy]

You'll need a 7.25" dia silencer to lower the noise level. My caterham fireblade has a repackable silencer i designed and its 98dbA static. My old 6" inch dia silencer was over 108 db at 3/4 max rpm.

[R1 Indy]

Thanks guys, don't think I will risk it then.

Thinking of going straight into the deep end and booking cadwell park

[mattnoss]

Ive got a megabusa with a 7" repackable simpson silencer and reverie airbox and I've done Bedford a few times and was always only just under 101db, was fine on drive by though.

[TonyF]

My Radical SR3 RS passed the noise test at Bedford the last time out there and I am booked on for this Saturday also. HTH.

[Zumbruk]

R1 Indy said:

I would like to book Bedford autodrome, but am a bit worried about the 101db test.

Does anyone have any advice?

Call Bedford Autodrome on 01234 332400, tell them you'd like a noise check, and they'll arrange for you to pop over and get it done, FoC. It's the same guy and equipment they use on track days, so you get a definitive check. If it's over 98dB static, there's a chance you'll fail the drive-by - they can't check that without, er, driving by, so they can't do 'ad-hoc' checks. My Westfield, at 97dB static (2 litre Zetec with extra large silencer & closed bonnet - a lot of the noise is induction) passes the drive-by.

[maxgas]

I took my Westfield megablade and had no problems with nose, but I did use a end can from merlin motorsports.

I had no problems with engine temperature, car was factory built with standard exhaust .

Cannot remember the db on the day of test , I would recommend getting a decibel and taking it with you.

I have seen lots of caterham s lately at track days beng black flagged for noise , just buy one as they are not that expensive.

Better to be prepared, then miss out on track time.!

[Zumbruk]

maxgas said:

Cannot remember the db on the day of test , I would recommend getting a decibel and taking it with you.

Assuming you mean a decibel *meter*, I also got them to check mine while I was at Bedford. It overreads by 12dB!