Dave Eastwood (Gadgetman) - Club Chairman Posted January 27, 2006 Share Posted January 27, 2006 I know the primary length is important (or so I've been told) but if you chopped a bit off the secondaries, would that make much difference to the tuned length etc? Tigger Yes, in theory at least; however, opinions vary on some of the lengths being quite right anyway, so might not be that much of an issue anyway. [/sit on fence] Link to comment Share on other sites More sharing options...
pete g Posted January 27, 2006 Share Posted January 27, 2006 poped in to Hayward & Scott today they said you had been in touch paul. kept up the good work Link to comment Share on other sites More sharing options...
scott beeland Posted January 27, 2006 Share Posted January 27, 2006 Just to add to the mix. Been given an opinion today that says 1 3/4" primaries @28-30" long 2" secondaries and 2 1/2 into/through silencer will give better torque for a road/occasional track car This is versus the common dia's from SBD etc which the obove opinion suggests are better suited to Top end grunt Your thoughts? Link to comment Share on other sites More sharing options...
Bananaman Posted January 27, 2006 Share Posted January 27, 2006 can you confirm where the measurement is taken for the can Is it from the spun ends or the sleave length? Could be interested in 27" with 2.75 inlet. What's the O/D of the outlet? Link to comment Share on other sites More sharing options...
Dave Eastwood (Gadgetman) - Club Chairman Posted January 27, 2006 Share Posted January 27, 2006 Just to add to the mix. Been given an opinion today that says 1 3/4" primaries @28-30" long 2" secondaries and 2 1/2 into/through silencer will give better torque for a road/occasional track car This is versus the common dia's from SBD etc which the obove opinion suggests are better suited to Top end grunt Your thoughts? Just been doing a bit of enquiring myself today as well: the opinion was the pipe diameters for primary and secondaries would be reasonable, but that the secondaries were way too long, about 10" less would be beneficial! And strangely given how you say the pipe sozes are a little more biased to the top end, apparently secondaries that length are starting to rob some of the top end! (Though in fairness to SBD, this was qualified by the comment that the design may have been optimised for a specific engine setup and "unusual" cam design). Link to comment Share on other sites More sharing options...
Paul Ash Posted January 27, 2006 Author Share Posted January 27, 2006 Quote in from Hayward and Scott. 5 off VX Exhaust manifold as per SBD spec but bonnett exit. Polished £500 + Vat Satin Brushed £475 + Vat 10 off Silencer cans 7" x 26/ 29" inlet to be specified. £295 + Vat can you confirm where the measurement is taken for the can Is it from the spun ends or the sleave length? i.e 26" is including the spun ends. (but not inlet & tail pipes)What's the O/D of the outlet? The outlet tends to be the same as the inlet. I.e like mine 2 1/2 inlet & 2 1/2 outlet. My tail pipe accounts for 4 1/2" measured from the spun end. Link to comment Share on other sites More sharing options...
Tigger Posted January 27, 2006 Share Posted January 27, 2006 Well it sounds like I have a bit of margin then, if the can is too long, I'll just hack a bit off the secondaries ....... err I mean, I'll professionally remove a suitable amount Tigger Link to comment Share on other sites More sharing options...
Tigger Posted January 27, 2006 Share Posted January 27, 2006 BTW: Paul, Stew on this forum has mentioned that MK Engineering are doing repackable cans for around £160.00 a piece, maybe worth a mention? Tigger Link to comment Share on other sites More sharing options...
Paul Ash Posted January 27, 2006 Author Share Posted January 27, 2006 MK Engineering are doing repackable cans for around £160.00 a piece, maybe worth a mention? I think you may find that price will be for a 6" can not a 7" one. I think for the price Simpson are doing and the quality of the can its a bargain Powerspeeds can (if their 6" was anything to go by) was no way near the quality of the Simpson one. Link to comment Share on other sites More sharing options...
stu999 Posted January 27, 2006 Share Posted January 27, 2006 (Though in fairness to SBD, this was qualified by the comment that the design may have been optimised for a specific engine setup and "unusual" cam design). Phew!!! At last.... Link to comment Share on other sites More sharing options...
pete g Posted January 27, 2006 Share Posted January 27, 2006 haywood and scott is that Jans car Link to comment Share on other sites More sharing options...
Paul Ash Posted January 28, 2006 Author Share Posted January 28, 2006 Ive drawn up my Silencer can as below Mine measures A = 26" or 610mm B = 2 1/2" or 63.5mm C = 1 1/2" or 42mm So 98 - 99 Db from a 26" can Link to comment Share on other sites More sharing options...
langy Posted January 29, 2006 Share Posted January 29, 2006 Eek, just checked the bank account and post xmas debts are kicking in big time, best count me out for the moment Link to comment Share on other sites More sharing options...
TrevorC Posted January 30, 2006 Share Posted January 30, 2006 Looking for a new (trackday friendly) silencer for my Zetec engined SEW -- need to mate to the Westfield standard zetec manifold (2" dia), how long are the inlet tubes on these units? are they angled to suit? Cheers -- Trevor Link to comment Share on other sites More sharing options...
Paul Ash Posted January 30, 2006 Author Share Posted January 30, 2006 Looking for a new (trackday friendly) silencer for my Zetec engined SEW -- need to mate to the Westfield standard zetec manifold (2" dia), how long are the inlet tubes on these units? are they angled to suit? Currently the inlet are as per my drawing. I have organised with Simpsons a step adaptor to take the collector from 2" to 2 1/2" if reqd Cost £10 As far as an angled inlet, I'll come back to you. what length inlet are you requiring & do you know the angle Link to comment Share on other sites More sharing options...
Recommended Posts