gusto Posted February 4, 2002 Share Posted February 4, 2002 Does anyone have any experience of running an SLR with standard 4:1 6inch silencer at Castle Combe? Various people have offered advice on this, including Andy Checkley who said: "The new 7" is a Caterham race silencer, which I have been able to stretch the 6" silencer guard around as Caterham don't make a guard for this. It looks ok and hopefully will reduce the noise a bit. I am down at Goodwood again shortly so I will post the new noise level at 6,000rpm." Andy - I'd be very interested to know how you got on - or if anyone else has practical experience. Castle Combe is 100dbA at 3/4 revs....Many thanks. R7 SVN Link to comment Share on other sites More sharing options...
Jason Plato Posted February 4, 2002 Share Posted February 4, 2002 Several of us here in the Bristol group have had problems at Castle gloom , but it has mainly been VX's and xflows that have failed . I dont know of any SLR's that have failed running 6 or 7" silencer . Most come out at around 96-99 db . Induction noise can be a killer if they do the drive by tests . You should be ok with a std induction set up inside the bonnet . - Be conservative in your 3/4 revs wink.gif Dave Link to comment Share on other sites More sharing options...
gusto Posted February 4, 2002 Author Share Posted February 4, 2002 Thanks very much Dave. About 4,000 is 3/4 revs, I'm sure... R7 SVN Link to comment Share on other sites More sharing options...
Mike C. Posted February 4, 2002 Share Posted February 4, 2002 Gus, Two thoughts: Pop down to Castle Combe and get it checked out. When you are tested, make sure the engine is hot and been running for a while, dip the clutch and rev slowly and smoothly to the requested level - probably 4500 rpm. If you are too noisy you may need a new silencer, or it could be re-packed. Mad Manx Link to comment Share on other sites More sharing options...
Gridgway Posted February 4, 2002 Share Posted February 4, 2002 I was too loud at CC with my SLR and rather worn out 6" box. Got a 7" race one and it was fine. Depends on how worn out the 6" one is. WHen I took it off, I could tip it end for end and hear the wadding slide up and down! Graham Link to comment Share on other sites More sharing options...
gusto Posted February 5, 2002 Author Share Posted February 5, 2002 "Got a 7" race one and it was fine" - is that a standard Caterham part ? Easy to fit? Also, any loss in power through fitting this? Many thanks. R7 SVN Link to comment Share on other sites More sharing options...
Mike C. Posted February 5, 2002 Share Posted February 5, 2002 If your silencer is knackered, you could take a look at the Techcaft systems. Roger King has them advertised in the latest Low Flying. I don't know the relative merits of Techcraft, but they look good. Mad Manx Link to comment Share on other sites More sharing options...
Gridgway Posted February 5, 2002 Share Posted February 5, 2002 standard part, fits straight on, need a stronger rear bracket thing which is trivial. WOuldn't expect it to lose power as it's bigger, perhaps even the opposite. Not sure if it was developed for more power or less noise. Graham Link to comment Share on other sites More sharing options...
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