Jump to content

New forum theme with more updates to follow! Please see the main thread in Impact Bumping.

MarkJ

Castle Combe 1st May

Recommended Posts

Mark, it was a great day when I did it. Be careful however, the instructor giving the briefing told us that "some tracks have gravel traps or vast tarmac run-offs. Here we have wet grass to slow you down and then armco which will definitely stop you" Very reassuring! 

Enjoy. Chris.

 

Share this post


Link to post
Share on other sites

Thanks Chris, yes its similar to Cadwell, Goodwood and even parts of Brands hatch in that respect.  The sweeping curves remind me of Goodwood though and it has a couple of fun chicanes so should be a hoot  :)

 

Share this post


Link to post
Share on other sites

Tempted to book, but the noise limit is tight at 100. I struggle at Brands when it is 101!

 

Mark

Share this post


Link to post
Share on other sites
1 hour ago, SilverWT said:

Tempted to book, but the noise limit is tight at 100. I struggle at Brands when it is 101!

Mark

I think they're pretty strict on noise at Coombe. 

100 on SSI's is wildly optimistic IMO. 

Edited by GaryH

Share this post


Link to post
Share on other sites

They mention some guys on site who deal with noise problems, but not sure in what way, ie stick in silencers/noise killers or whatever.

I can cap off one pipe and I might lay a thick sound deadening blanket loosely over the top of the engine just for the noise test.  My car measured 101 at Oulton with both pipes open and that's with race headers. Really p*sses me off this noise malarkey at a race track. My friggin motorbike (on stock pipes)  is louder going down a street than my car.:rolleyes:

Share this post


Link to post
Share on other sites

Might be up for this. 

Going to see if I can get some baffles sorted :)

Share this post


Link to post
Share on other sites

I've got a Merlin Motorsport bolt-on,  can-type silencer, like this...

https://www.merlinmotorsport.co.uk/p/merlin-mild-steel-racing-muffler-m-ex-muff-4

Never actually used it so don't know how effective it is. Might knock a couple of dB off?

I can bring it to the Bicester Scramble this Sunday if you wanted to try it Mark. 

m_ex_muff_4.jpg

Edited by GaryH

Share this post


Link to post
Share on other sites

Edit: a trawl through old IB posts reminds me that the guy at Merlin reckoned it would knock a couple of dB off.

IIRC it mates to a 60mm diameter pipe. 

Edited by GaryH

Share this post


Link to post
Share on other sites

I'm off to Combe on Saturday afternoon for a few laps, but wary I might not get past the 98dB limit. Best to test with engine warm I guess? Bundles of steel wool shoved up the tips? 

Share this post


Link to post
Share on other sites

When I was there it was a 100db day and the noise tester said "we'll call that a Porsche 100db" and passed me, after he'd also said "Ah here comes a proper car.." Next was Snetterton 105db where it measured 104.9db. Read into that what you will but I'd take some baffles and some advice given to me by Mark (Silver WT) was to depress the clutch and be on the low side of the revs they request if you can get away with it. 

Chris.

 

Share this post


Link to post
Share on other sites

yeah It is a 100db day and Merlin Motorsports are the guys based at the track who offer noise solutions.

The day is run by Classic Car trackdays so would hope they are sensible about it.

Share this post


Link to post
Share on other sites

I was at Combe today and they passed my 3.2 at 99.5dB which they rounded up to 100. I am sure it was 102 at Oulton. Anyway I made sure it was nice and hot with a run on the road first, and kept my foot on the clutch.

Car has no air box and a Turbo Thomas 2-in-2-out with manifold. Otherwise standard.

Beware the new surface if you have been to Combe before!

Share this post


Link to post
Share on other sites

did anyone else sign up? or just me on my tod flying the IB flag? :morning:

@reddevil, shame we missed each other by a week!

Share this post


Link to post
Share on other sites
On 23/04/2018 at 1:17 PM, MarkJ said:

did anyone else sign up? or just me on my tod flying the IB flag?

Sorry Mark, not going to chance it due to noise.

On 18/04/2018 at 4:41 PM, GaryH said:

I can bring it to the Bicester Scramble this Sunday if you wanted to try it Mark. 

Thanks for the offer Gary, but was not going to get to Bicester and it will not fit my large diameter twin outlet.

 

As compensation, I have booked myself on a Brands GP day, 101dB which I have scraped through before. I will start another thread on it.

 

Mark

Share this post


Link to post
Share on other sites
38 minutes ago, SilverWT said:

As compensation, I have booked myself on a Brands GP day, 101dB which I have scraped through before.

Brands are pretty Porsche-friendly (only used to have one noise tester at the back ;)

Share this post


Link to post
Share on other sites
Just now, GaryH said:

Brands are pretty Porsche-friendly (only used to have one noise tester at the back ;)

that was in the good old days, they are proper tossy about noise there in the last year or so :rolleyes: By chance we had one of their noise testers in the office doing some odd-job work a few weeks ago and I gave him plenty of stick about being a dick over noise and that they need to be a bit more flexible for rear engine cars with short pipes. Hopefully he took it onboard  ;-)

 

Share this post


Link to post
Share on other sites

Ah fair enough, it's been a 'few' years since I've been. I remember they let Teo's blue car through! :o

Edited by GaryH

Share this post


Link to post
Share on other sites
5 hours ago, GaryH said:

I remember they let Teo's blue car through! 

Yes, but on the Indy circuit where the day time noise limit is usually 105dB. The evening Indy noise limit is 102dB.

Share this post


Link to post
Share on other sites

had a great day, weather gods smiled on me with a perfect sunny day :)  Great mix of elcectic classic cars present and nice people. Got plenty of high speed laps in and managed one spin!  ...just pure over hooning :D

Castle combe is a quick track with a couple of technical corners, one scary balls-out double corner and a couple of chicanes. Think my car was the quickest over a lap on the day and car got lots of compliments, so all good. No issues with noise at all and there were a couple of cars louder than ours on track.

Will stick a vid up when I get around to editing one.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


Gatherings organised via IB

Anyone attending a meet or event organised via ImpactBumpers.com does so at their own risk. ImpactBumpers.com is not responsible in any way for damage or personal injury sustained while attending any such gatherings. Please behave responsibly.

IB & Mighty Motor Media

ImpactBumpers.com is part of Mighty Motor Media Limited: UK company 07983578. The Impact Bumpers name and all logos are ©Mighty Motor Media Ltd. We have no connection to DR. ING. H.C. F. PORSCHE AG or any of its subsidiaries.

Respect Creative Copyright

We do not endorse the sharing of copyrighted images. Individual users are responsible for all content they post. It is impossible for admin to check every upload but we will remove disputed images swiftly to support copyright holders. Contact us anytime.

More JG websites

Using The Sheriff's other websites supports the IB forum! Please share my valuation services with anyone needing assistance.

×
×
  • Create New...