Radical Quiet exhaust
Discussion
Sorry BertBert I've been busy, thanks for the offer after some great response to my issue I'm going to take the car to Neil Handbury in Taunton to have one fitted, he said he'll perfect it make the 100db I need, all sounds promising and certainly
Eliminates the potential stress and disappointment of trying to make something work on a track day.
Eliminates the potential stress and disappointment of trying to make something work on a track day.
Sigmamark / ChrisV
My "quiet" silencer measured 103db static 7000rpm at Coombe. I bought a 90 degree bend and oval (i think 18 inch) silencer from Merlin, attached it to the silencer and it reduced it to 99/100db, enough to get on. There is a reduction in performance but at least I get on track.
Happy to transfer this arrangement to your car at Combe to see if it does the job for you. Email me if you are interested and want to fix dates.
Equally I am interested in the Handbury solution if it works, on the assumption the engine will rev and power as it should, so hopefully you will keep us all informed.
My "quiet" silencer measured 103db static 7000rpm at Coombe. I bought a 90 degree bend and oval (i think 18 inch) silencer from Merlin, attached it to the silencer and it reduced it to 99/100db, enough to get on. There is a reduction in performance but at least I get on track.
Happy to transfer this arrangement to your car at Combe to see if it does the job for you. Email me if you are interested and want to fix dates.
Equally I am interested in the Handbury solution if it works, on the assumption the engine will rev and power as it should, so hopefully you will keep us all informed.
mad4amanda said:
Sorry banana fingers I will..... infact I have already raised a query.
It's nearly a month now and the opportunity to have a totally daft and completely unproductive conversation with the bloke with the well dodgy noise wand @ Snett about how the ACU Rules take precedence over the MSA Rules at Car Trackdays gets ever closer.Please advise asap.
It was always clear, well it was until mad4amanda muddied the waters 
) at spotting which Radical is which. Not very I suspect. For example one RXC variant revs to little more than 6.5K whereas another variant revs to more like 10.5K and an SR5 looks identical to its SR3 equivalent etc
I've encountered several 'what I don't know isn't worth knowing' noise testers over the years so probably best to just post up the name and address where MSV would like any bills to be sent?
mad4amanda said:
.......... so for a radical that will be around 7500 rpm.
At least there will be a standard across all tracks now.
There could be more than a standard finding its way across all tracks. How about bits of valve gear and the odd piston? I.e. there are several current (and rather pricey) Radicals and at least one discontinued model I can think of which should be nowhere near 7500rpm @ 3/4 max revs. How proficient are your noise testers (including those @ Snett At least there will be a standard across all tracks now.
) at spotting which Radical is which. Not very I suspect. For example one RXC variant revs to little more than 6.5K whereas another variant revs to more like 10.5K and an SR5 looks identical to its SR3 equivalent etc I've encountered several 'what I don't know isn't worth knowing' noise testers over the years so probably best to just post up the name and address where MSV would like any bills to be sent?
Whilst I didn't destroy the motor, being asked for 7500rpm at Castle Combe with a brand new and virtually unrun unit seemed ridiculous. Yes I would have run it to 10k on the track, but it would have been under load which to my opinion is a lot less damaging (although I'm happy for someone to tell me im wrong!).
Still "rules are rules sonny" and we all know who knows best don't we?
I went home!!
Still "rules are rules sonny" and we all know who knows best don't we?
I went home!!
splitpin said:
It was always clear, well it was until mad4amanda muddied the waters
) at spotting which Radical is which. Not very I suspect. For example one RXC variant revs to little more than 6.5K whereas another variant revs to more like 10.5K and an SR5 looks identical to its SR3 equivalent etc
I've encountered several 'what I don't know isn't worth knowing' noise testers over the years so probably best to just post up the name and address where MSV would like any bills to be sent?
Which is why we ask the model and engine (noted on the form ) and if needed look up the max rpm and work the 3/4 out from that .mad4amanda said:
.......... so for a radical that will be around 7500 rpm.
At least there will be a standard across all tracks now.
There could be more than a standard finding its way across all tracks. How about bits of valve gear and the odd piston? I.e. there are several current (and rather pricey) Radicals and at least one discontinued model I can think of which should be nowhere near 7500rpm @ 3/4 max revs. How proficient are your noise testers (including those @ Snett At least there will be a standard across all tracks now.
) at spotting which Radical is which. Not very I suspect. For example one RXC variant revs to little more than 6.5K whereas another variant revs to more like 10.5K and an SR5 looks identical to its SR3 equivalent etc I've encountered several 'what I don't know isn't worth knowing' noise testers over the years so probably best to just post up the name and address where MSV would like any bills to be sent?
We Know there are different engine configs but the worrying thing is many drivers don`t appear to know what they have.
I have to say that in my experience, MSV always ask about the car to get the revs right. So if one is in an SR3 with a daft non-revving car engine (Neil Cox put a Duratec in one), then just say so and they'll sort it out. If you are running in an engine and limiting it to 7k rpm, they'll sort you out accordingly.
Providing the temps are up, is there a problem hitting 7500 for a static test?
Bert
Providing the temps are up, is there a problem hitting 7500 for a static test?
Bert
Sigmamark7 said:
Whilst I didn't destroy the motor, being asked for 7500rpm at Castle Combe with a brand new and virtually unrun unit seemed ridiculous. Yes I would have run it to 10k on the track, but it would have been under load which to my opinion is a lot less damaging (although I'm happy for someone to tell me im wrong!).
Still "rules are rules sonny" and we all know who knows best don't we?
I went home!!
You seriously went home to avoid revving to 7500rpm in the paddock? Still "rules are rules sonny" and we all know who knows best don't we?
I went home!!
Race cars get noise tested to those revs every day of the week at Castle Combe (and lots of other venues) but I've never heard of an engine going pop at a noise test. If the engine's warm, I can't see the problem.
andylaurence said:
Sigmamark7 said:
Whilst I didn't destroy the motor, being asked for 7500rpm at Castle Combe with a brand new and virtually unrun unit seemed ridiculous. Yes I would have run it to 10k on the track, but it would have been under load which to my opinion is a lot less damaging (although I'm happy for someone to tell me im wrong!).
Still "rules are rules sonny" and we all know who knows best don't we?
I went home!!
You seriously went home to avoid revving to 7500rpm in the paddock? Still "rules are rules sonny" and we all know who knows best don't we?
I went home!!
Race cars get noise tested to those revs every day of the week at Castle Combe (and lots of other venues) but I've never heard of an engine going pop at a noise test. If the engine's warm, I can't see the problem.
Anyway, following your advice, I have an entry for the GWS on the 21st, so hopefully you can prove what a friendly bunch you Libre boys are and give me some tips as to how I can get sufficient heat in the brakes and tyres, to avoid an early and expensive visit to the barriers at Quarry. Any advice will be very gratefully received.
Mark
splitpin said:
As you will apparently be competing with the fastest cars outside the British Grand Prix, do be careful!
Talk about creative, copy penned by someone with even more imagination than Mad4Amanda?
2 points - Firstly, I am quite disappointed to learn that the SR3RS isn't actually faster than a F1 car and secondly, I have every intention of being careful. I will be wearing clean underwear and might even check the wheel nuts are tight and that most of the tyres have some air in them. I will also have a comprehensive list of excuses available to explain my lack of pace/courage/talent! Surely that covers all the bases.Talk about creative, copy penned by someone with even more imagination than Mad4Amanda?
mad4amanda said:
Bert once again makes a very good point make sure the temps are up when doing a noise test at static it is not only better for the engine but it will reduce the result normally by a dB or 2.
Book that hotel room and/or change your handle to mad4bert? Decisions, decisions 
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