All times are UTC

 




Post new topic  Reply to topic  [ 4 posts ] 
Author Message
PostPosted: Fri Aug 30, 2013 8:08 pm 
Offline
User avatar

Joined: Mon Jul 29, 2013 7:24 pm
Posts: 9
Name:
Hello everyone

I'm running a 2.0L Silvertop Zetec with throttle bodies and megasquirt so looking at around 170bhp, 180 tops. I need my exhaust dB to be low enough for IVA (obviously) and also low enough for trackdays (not sure what this level is, but I assume if it has passed an IVA then it'll pass for track use too?).

Can anyone suggest what silencer dimensions I require? and where you would recommend buying from?

Thanks
Josh


Top
   
PostPosted: Fri Aug 30, 2013 10:58 pm 
Offline
Site Moderator
User avatar

Joined: Sun Dec 02, 2012 3:59 pm
Posts: 1016
Name: Bruce
Location: Biggleswade
Hi Josh, I'm no expert on exhausts, but if your looking for something more than just a generic exhaust then you will probably have to speak to a specialist exhaust manufacturer.

A quick google brought up these http://www.powerflowexhausts.co.uk/ (I have no knowledge of them or their products) its probably worth speaking to a few specialist suppliers with your specific set up info to try to get a picture of what a tailor made set up will consist of.

I know that's probably not the easiest or cheapest answer but if you do find someone helpful please feel free to share it up.

Bruce


Top
   
PostPosted: Wed Sep 04, 2013 7:09 am 
Offline
User avatar

Joined: Mon Dec 03, 2012 8:56 pm
Posts: 76
Name:
I asked a more general question over on LocostBuilders about exhaust systemts and it sounds like a lot of people don't usually put that much thought into what silencer in terms of the quality of the performance (so your power output etc is irrelevant) - basically any old end can that looks good is OK. Don't forget that the silencer is part of a bigger system though...

It'll be a trade off of noise vs performance - the more you pack into a silencer the quieter it'll be - but that'll limit performance. Depends what you want to get out of it.

I think Bruce is spot on - ask some experts - but don't expect them to be cheap.

Alternatively i've been pointed at this book as a good source of information about calculating the correct size/length/etc of an exhaust system - i'm going to buy a copy: http://www.amazon.co.uk/Four-stroke-Per ... nce+tuning

_________________
M'blog http://meandthekitcar.wordpress.com/


Top
   
PostPosted: Fri Sep 06, 2013 10:06 am 
Offline
User avatar

Joined: Mon Jul 29, 2013 7:24 pm
Posts: 9
Name:
Thanks for the replies. I was wondering if there was any science to selecting a suitable silencer but I can see now that most people don't bother - I will keep trawling ebay and forums until I find a can I like.

As far as the rest of my exhaust system goes, I am using the manifold from a Focus ST170:

Image

I have cut it between the 2-1 section and I plan to make my own 2-1 section with a flange inside the bodywork that will accept the downpipe, leaving me with what I hope will be a very tidy looking system :)

Josh


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 4 posts ] 

All times are UTC

 


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron

Copyright 2016: Roadster Builders

 

Powered by phpBB® Forum Software © phpBB Limited