BeingOriginal Posted August 21, 2018 Share Posted August 21, 2018 My next task on the car is one of noise reduction so I can attend a track day.The car is currently fitted with a 7" Edwards Motorsport silencer (no cat) I've repacked the silencer with acousta-fil and I've lost 8-10db from idle but from a quick check with a phone app it's still registering c113db @4k and c118db @6k (rev limit 8750) measured at 45 degrees and 1m.Appreciate the phone will be inaccurate but my feelings is I'll still be comfortably over the 105db I need (I've ordered a db meter and will try to get to Brands Hatch to have the car properly tested) but in the meantime does anyone have any suggestions to quieten it down?regardsDan Link to comment Share on other sites More sharing options...
Support Team Shaun_E Posted August 21, 2018 Support Team Share Posted August 21, 2018 What spec engine is it? I'm using a RaceCo long (950mm) silencer on my 260bhp engine and record less than 105dBA even at Goodwood. Not sure it will fit on standard manifold pipes - I've got a RaceCo through the bonnet manifold system but they aren't available anymore (the silencers are available). Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted August 21, 2018 Member Share Posted August 21, 2018 Appreciate the phone will be inaccurate...Which app were you using?I think they can be pretty good.It would be great if you could compare the app back to back with the dedicated meter...Jonathan Link to comment Share on other sites More sharing options...
BeingOriginal Posted August 21, 2018 Author Share Posted August 21, 2018 Using the Decibel X app, will add my findings vs a cheap meter and whatever Brands use. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted August 21, 2018 Member Share Posted August 21, 2018 ThanksJonathan Link to comment Share on other sites More sharing options...
BeingOriginal Posted August 21, 2018 Author Share Posted August 21, 2018 2.0 Scholar Engine, Jenvey's, Piper BP300 etc, car made 258bhp with the 2 Steve's. Link to comment Share on other sites More sharing options...
Support Team Shaun_E Posted August 21, 2018 Support Team Share Posted August 21, 2018 Similar spec to mine then (mines a Raceline engine). Have a word with Mike Riley at RaceCo and see if he can make a long silencer to fit your car - that should get you below 105. Of course induction might also be an issue and the cams and cam timing could be different to my car so no guarantees. Link to comment Share on other sites More sharing options...
7 wonders of the world Posted August 25, 2018 Share Posted August 25, 2018 Or speak to Mike Edwards he made me a complete thro the bonnet system that was better then my previous Goodfab / Raceco system on the previous car, Link to comment Share on other sites More sharing options...
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