Trackday silencer
Discussion
Just bought an SR3RS which came complete with a trackday silencer.
Put it on tonight to check the noise and got 108db at 7000rpm!!
For a silencer that is meant to give 98db that seems a bit excessive!!!!!!!
As a newbie can you good folks give me your opinions of the Std Radical trackday silencer and your findings/solutions to excessive noise.
Put it on tonight to check the noise and got 108db at 7000rpm!!
For a silencer that is meant to give 98db that seems a bit excessive!!!!!!!
As a newbie can you good folks give me your opinions of the Std Radical trackday silencer and your findings/solutions to excessive noise.
I did a search before posting and got one thread with nothing helpful on it.
As you know the search engine does not work that well.
I would like to here from people who have real experience at tracks such as Bedford (101db static at 3/4 revs) who can tell me if they got on and how they got on using what silencers etc
As you know the search engine does not work that well.
I would like to here from people who have real experience at tracks such as Bedford (101db static at 3/4 revs) who can tell me if they got on and how they got on using what silencers etc
Sorry Mark from what I've seen before you have zero chance of getting out at Bedford unless they run at least a 105db noisy day.
Last year at the pre race Castle combe test day it was I think a 98db limit, despite having the "quiet" exhaust & then a supertrap on the outlet pipe I couldn't get passed to run & that was with the 1340cc PR6.
Some of the made up contraptions teams fabricated to increase silencing on the SR3's where truly scary, they would of fallen off in about 2 mins if they got through but didn't see anyone make it out despite a number of them also putting quilts under the engine cover to dampen down induction noise....
Last year at the pre race Castle combe test day it was I think a 98db limit, despite having the "quiet" exhaust & then a supertrap on the outlet pipe I couldn't get passed to run & that was with the 1340cc PR6.
Some of the made up contraptions teams fabricated to increase silencing on the SR3's where truly scary, they would of fallen off in about 2 mins if they got through but didn't see anyone make it out despite a number of them also putting quilts under the engine cover to dampen down induction noise....
MarkWebb said:
I did a search before posting and got one thread with nothing helpful on it.
As you know the search engine does not work that well.
I would like to here from people who have real experience at tracks such as Bedford (101db static at 3/4 revs) who can tell me if they got on and how they got on using what silencers etc
Indeed, 'Search' isn't very clever - in fact, I've been away for a few days and the whole site seems to have gone to total pot meantime.As you know the search engine does not work that well.
I would like to here from people who have real experience at tracks such as Bedford (101db static at 3/4 revs) who can tell me if they got on and how they got on using what silencers etc
Mark, your TD Silencer performance on your RS seems much the same as we had with ours, shakedown back in early part of 2010 @ Snett .......... I really must start to keep better records! .......... we just failed the 105 static with the race can on (106 from memory), so on goes the 'quiet', back to noise testing, full of confidence, boom, boom, fail @ bloody 108! Luckily managed to borrow a Supertrapp (now have one - pretty well essential IMHO with a Rad), put that on the quiet, pass (@ 103 from memory.) Quiet was subsequently assumed to be a duff fabricated one, so Radical swapped it, no obvious problems since.
Funnily enough, we did manage to do a day @ Bedford in the SR4 (101 static/87.5 driveby
), but TBH it was a soft/poker test. TBH, I just don't like doing Bedford with a Rad ........ noise testing wrong side of speed bumps, can't park your trailer next to your car. All that room they have there and still they manage to make it a nightmare for people with stuff like Rads.My advice is to avoid trackdays where a compulsory static is less than 105, better still go somewhere like increasingly rare Dony, where you only have to do a static if you trip the drive-bys, usually 98 when the static is 105, a level that I've never had any problems with. In fact, one time @ Snett, whatever we did we could not make the static so we were finally let on track on the clear understanding of 'first drive-by trip, home you go' - we were there for the rest of the day, no problem and no soft pedalling.
These stupid static noise tests are becoming more and more of a problem with Rads and let's be honest, things are only going to get worse. IMHO, The Big R will need to do something @ OEM level about this pronto, else it won't be long before Rads can't be used at the vast majority of trackdays and that will hit sales in a big way.
Martin B said:
Noise tests vary considerably, ............
Indeed ...... but unfortunately, the one thing we can probably be sure of is that if they are done correctly using a properly calibrated noise meter is that with the present silencer provisions there's a good chance a Radical will fail the static.It seems then that going to places that don't static test beforehand is the way to go.
Am I correct in saying that you don't have a problem with drive by tests in general?
Spole to somebody today who said that he managed to get his radical on track at Bedford despite failing the static and had no problem thereafter.
Am I correct in saying that you don't have a problem with drive by tests in general?
Spole to somebody today who said that he managed to get his radical on track at Bedford despite failing the static and had no problem thereafter.
Our clubby used to struggle at castle combe race days and that was when we used to re pack before each race with new e glass.
The pr6 has done three quarters of the year there with the same original basalt and wire wool and we haven't had a problem at all.
I think most rads should be able to get to a 105db limit with the right can, but anything under 100db will be difficult.
The pr6 has done three quarters of the year there with the same original basalt and wire wool and we haven't had a problem at all.
I think most rads should be able to get to a 105db limit with the right can, but anything under 100db will be difficult.
We used to really struggle with our SR3. Tried quiet exhausts, repacking etc etc and it got so bad that we just gave up on tracks like Coombe where the test is always that little bit tighter.
We ended up having an exhaust made (and I don't have the details to hand...sorry). We have twin pipes coming out of the side of the silencer and exiting. It's bloomin marvellous and we test at anything from 98 to 101db static.
From out point of view that means just about all venues are open to us. I'll post more details when I can get them if it's of interest.
Radical don't seem to be able to supply anything that does the job.
I know what you mean about Bedford. It's a great circuit when you are out on it but just about everything else there is a PITA frankly.
We ended up having an exhaust made (and I don't have the details to hand...sorry). We have twin pipes coming out of the side of the silencer and exiting. It's bloomin marvellous and we test at anything from 98 to 101db static.
From out point of view that means just about all venues are open to us. I'll post more details when I can get them if it's of interest.
Radical don't seem to be able to supply anything that does the job.
I know what you mean about Bedford. It's a great circuit when you are out on it but just about everything else there is a PITA frankly.
This is all getting silly. As Trev says, Radical themselves should design efficient silencing systems or they will ultimately lose sales. It is only because the sound testing at various venues varies so much that this problem perpetuates. It needs a two pronged approach. First the method of testing and measurement should be a prescribed standard. Second, a competent acoustic engineer should be engaged by someone to design, test and certify solutions. All this anecdotal evidence is irrelevant.
Extremeracer said:
This is all getting silly. As Trev says, Radical themselves should design efficient silencing systems or they will ultimately lose sales. It is only because the sound testing at various venues varies so much that this problem perpetuates. It needs a two pronged approach. First the method of testing and measurement should be a prescribed standard. Second, a competent acoustic engineer should be engaged by someone to design, test and certify solutions. All this anecdotal evidence is irrelevant.
Well I agree about the Radical comments but not with the rest of your post.We tried the 'trackday' silencer from Radical and suffered from being too loud on several occassions. We had a silencer made and we are now ok. That's a fact, anecdotal or not.
The method of testing is already prescribed pretty clearly in my view. There are however variables which I suspect are not dealt with my having an acoustic engineer, most of those human or surroundings related. Whilst someone may design a solution, you'll still have it tested at every track day.
You want to play at trackdays, you know the rules.
The trouble is that the allowed noise varies quite considerably. I'm not saying that Radical shouldn't have better options, but there's lots of cars that have trouble at the quieter days/venues (Combe, Goodwood, Bedford etc).
The quiet box seems very variable, but together with an additional dongle I've got on to all the track days I've tried.
So the asnwer must be to come up with a super-dooper design and licence it back to Radical themselves!
Or just market it and sell it.
It might be quite hard owing to the other noise around as well.
Bert
The quiet box seems very variable, but together with an additional dongle I've got on to all the track days I've tried.
So the asnwer must be to come up with a super-dooper design and licence it back to Radical themselves!
Or just market it and sell it.
It might be quite hard owing to the other noise around as well.
Bert
What makes it frustrating is the whole process of noise testing is not consistant
Try arriving at the CC stroke charity day,where the paperwork we have been given is 105,and we are then told that is a mistake and the limit is 100!!
The 2 old boys who were testing seemed delighted every time I went up and failed.
Fortunatly I am am significantly cleverer than they are,and I managed to get my big bore 1615cc through
Dont ask how I did it,because you couldn't actually drive the car on the track with the "mods"!
Try arriving at the CC stroke charity day,where the paperwork we have been given is 105,and we are then told that is a mistake and the limit is 100!!
The 2 old boys who were testing seemed delighted every time I went up and failed.
Fortunatly I am am significantly cleverer than they are,and I managed to get my big bore 1615cc through
Dont ask how I did it,because you couldn't actually drive the car on the track with the "mods"!
One assumes the expression 'Charity Begins At Home' would be completely lost on those miserable beggars?
So, not only the deployment of the 'if everything else fails' chicken wire, the whole bloody chicken stuffed up there as well?
BTW, I hear a temporarily and momentarily mislaid noise meter makes a decent dB insert.
So, not only the deployment of the 'if everything else fails' chicken wire, the whole bloody chicken stuffed up there as well?
BTW, I hear a temporarily and momentarily mislaid noise meter makes a decent dB insert.
Just spoken to my mate.
We had he silencer made by an engineer local to us. The welding and workmanship is excellent. We have a 1300 Hybusa and the silencer fits straight on to the existing manifolds, has a central support and we have made an additional support under one of the tail pipes.
We are just costing up having some made up if there is interest. As I said before, we test between 98 (96 on one rogue test I recall) and around 101 with never a problem on drive by.
We don't have any problems with it suffocating the engine (as we did on a previous exhaust from Radical).
If anyone is inmterested please let me know and if anyone wants to see it the car is kept at Windsor. PM me if you do. Equally, let me know if there is interest.
You can see the back of the box and the twin tail pipes. That's at Bedford which can be very tight for noise.
We had he silencer made by an engineer local to us. The welding and workmanship is excellent. We have a 1300 Hybusa and the silencer fits straight on to the existing manifolds, has a central support and we have made an additional support under one of the tail pipes.
We are just costing up having some made up if there is interest. As I said before, we test between 98 (96 on one rogue test I recall) and around 101 with never a problem on drive by.
We don't have any problems with it suffocating the engine (as we did on a previous exhaust from Radical).
If anyone is inmterested please let me know and if anyone wants to see it the car is kept at Windsor. PM me if you do. Equally, let me know if there is interest.
You can see the back of the box and the twin tail pipes. That's at Bedford which can be very tight for noise.
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