chrisd Posted March 31, 2003 Share Posted March 31, 2003 OK - time to bite the bullet and replace my silencer, or not get on any tracks this year. I know a lot of posts have recently been about exhaust systems, but can anyone give advice about the pros and cons of repackable silencers, esp from techcraft and raceco, as they seem about the same price. Or are there any others I should consider for my 1800 x/f?? cheers Chris Link to comment Share on other sites More sharing options...
rgrigsby Posted March 31, 2003 Share Posted March 31, 2003 I've got a "Goodwood" long Techcraft 6" silencer for my 1800 Xflow which seems to be fairly good, although it's still quite loud a lot of the noise if coming from the carbs due to the 264Cam I'm running... The Raceco ones are lighter I believe and I guess they do long/big ones, depending on what cam you're running I'd get the biggest silencer you can lay your hands on!! Cheers Rob G www.SpeedySeven.com Link to comment Share on other sites More sharing options...
Rob Walker Posted March 31, 2003 Share Posted March 31, 2003 Why not cut away the existing box and make it repackable. All you need is a local fabrication shop to roll you up a sleeve out of Ali that will fit over the ends of the existing box. The sleeve can be held in place with self tapping screws, save yourself £300. Link to comment Share on other sites More sharing options...
Drumster Posted March 31, 2003 Share Posted March 31, 2003 Chris, Fitted a 6" Techcraft silencer a few years ago and this got the noise level down from 110db to 95db (mind you the old 5" caterham silencer was almot 'empty' 😳). Have only repacked it once in 10,000 miles. Last time it was checked at Castle Combe in October 2002 it came in at 100db but a few months earlier it was only 95db. It seems to me that there is too much discrepancy on the accuracy of the meters, the ability of some people to use them properly and also the location of the noise test. But generally I have to say I'been happy with the Techcraft Chris Alston 1800 Supersprint - Loud and Proud 😬 ...well it only sounds fast officer 😳 Brooklands aeroscreens for those........flies in the teeth moments Drive it like you stole it! Link to comment Share on other sites More sharing options...
stevefoster Posted March 31, 2003 Share Posted March 31, 2003 My oldish repacked techcraft 6" came in at 104dB at Lydden on Sat. This is with VX race pipes and throttle bodies. It's perforated tube is rattling about inside and I plan to weld the front end fixed in to solve this. MSA limit is 108 so quite ok... I have a bolt on rear box etc for the whisper events but would never plan on doing any of them though! My racing pics, 7 DIY, race prep. Updated often here Photo's of the year here Hants (North) and Berkshire Area club site here Link to comment Share on other sites More sharing options...
NoLimits Posted April 1, 2003 Share Posted April 1, 2003 Raceco ❗ ❗ ❗ Not sure about noise levels yet its only done Llandow but made to measure looks good and is extremely light. Sounds good when in the car but according to others sounds even better and different to others when listening to the car from trackside. MY 51VEN - SLR Give it some WELLY! Link to comment Share on other sites More sharing options...
Fast Westie Posted April 1, 2003 Share Posted April 1, 2003 Steve I think you will find the MSA limit is 105dB! The car in front is a Westfie1d Link to comment Share on other sites More sharing options...
OAP Posted April 1, 2003 Share Posted April 1, 2003 No Limits, Can you get it measured? This would be a very useful comparison for me as we run the same cars. My standard silencer seems to give 102/103db at 4500 which makes me reluctant to front up a non returnable £xoo for 100db track days. I put a posting on here yesterday under "noise" to try and get some guidence. Link to comment Share on other sites More sharing options...
rgrigsby Posted April 1, 2003 Share Posted April 1, 2003 Hmm 105dB could be interesting.... Rob G www.SpeedySeven.com Link to comment Share on other sites More sharing options...
StewartG Posted April 1, 2003 Share Posted April 1, 2003 I believe that Techcraft silencers are not neccessarily car specific. This means that an adapter pipe from collector to inlet pipe is needed and there isn't a bracket welded on to secure the back. Raceco ones are not only Seven specific but Ammo prefers to tailor them to individual cars and although I don't know too much about their relative noise outputs I'm sure the Raceco ones are significantly lighter and probably less restrictive. Care may need to be taken if the larger diameter is ordered as ground clearance can be an issue on both. Link to comment Share on other sites More sharing options...
Bangers quotNquot Mas1697456953 Posted April 1, 2003 Share Posted April 1, 2003 Raceco are superb. I had mine fitted in the depths of winter. It makes the car much quieter. The biggest shock to me though was the weight saving. The silencer is feather weight!! Raceco are really helpful as well. "Metal Mickey" is a sound guy who made a super "factory job" job of the fitting. Highly recommended. Andy W7 VHP Link to comment Share on other sites More sharing options...
Rob Walker Posted April 1, 2003 Share Posted April 1, 2003 Wow its a really difficult job to fit a silencer, must have taken all of 5 mins. Link to comment Share on other sites More sharing options...
I reply to every thread Posted April 1, 2003 Share Posted April 1, 2003 The Techcraft ones do have a reputation for splitting their welds - (I'm told) & they do require that additional pipework. I'm a Hayward & Scott man myself. Well made, repackable, quiet and aesthetically pleasing - more so than some! Link to comment Share on other sites More sharing options...
I.Mupferit Posted April 1, 2003 Share Posted April 1, 2003 Just fitted a Hayward & Scott to mine and I second Aves comments, it is well made, well finished and fits straight on to the existing collector and side bracket with no further mods or additions necessary. Brent 7 not now in so many bits 😬 Link to comment Share on other sites More sharing options...
OAP Posted April 1, 2003 Share Posted April 1, 2003 But how much quieter is it!!? Link to comment Share on other sites More sharing options...
chrisd Posted April 1, 2003 Author Share Posted April 1, 2003 Any contact details for Haywood & Scott, as I've not heard of them. Also, as OAP asks - are they quiet?? Link to comment Share on other sites More sharing options...
John Howe Posted April 1, 2003 Share Posted April 1, 2003 I have a Techcraft and have no problem with it but a close friend (Foxy Smith) made his change after over, after I did, and by then Raceco were available and he follwed that route! If I had the choice to do it again I'd go with Ammo's crowd. Lighter, effectively made to measure and, without a machine to record, appear quieter. Foxy Smith and I live in the same W. Sussex village - when I leave this village, Foxy knows! When he goes out, I only know if he comes up the hill to see me! ... and its lighter. If some one offered me a good price for my little used Techcraft, I'd jump at the chance to go the Raceco route. JH Deliveries by Saffron, the yellow 222bhp Sausage delivery machine Link to comment Share on other sites More sharing options...
Alex Wong1697456877 Posted April 1, 2003 Share Posted April 1, 2003 Have looked at my Raceco and compared it with the Techcraft exhaust. I think the Raceco looks better made and seems to hold it's packing in alot better. It is incredibly light and looks less aftermarket than the Techcraft. Link to comment Share on other sites More sharing options...
I reply to every thread Posted April 1, 2003 Share Posted April 1, 2003 Hayward And Scott www.haywardandscott.co.uk (Surprisingly!) Worth looking at their website as it gives an idea of the type & quality of their work. Link to comment Share on other sites More sharing options...
I.Mupferit Posted April 1, 2003 Share Posted April 1, 2003 OAP, My H & S is whisper quiet...........................but that's probably 'cos I haven't started the engine yet 😬 Brent 7 not now in so many bits 😬 Link to comment Share on other sites More sharing options...
Jason Plato Posted April 1, 2003 Share Posted April 1, 2003 Rob - stop winding them up and just fetch me a length of ally or titanium tube and we will get on and do it dave Link to comment Share on other sites More sharing options...
Lawrence_Z Posted April 1, 2003 Share Posted April 1, 2003 I had my first run with my Raceco on Sunday night and it was so quiet that I could hear the tyres making a sort of "separating velcro" type sound...... also had the change light on in 6th so I'd say it helps the engine breath, definitely v quiet, and superbly made Lawrence Link to comment Share on other sites More sharing options...
Julian Thompson Posted April 1, 2003 Share Posted April 1, 2003 My raceco is fantastic. I did have a slight problem with it burning the filling on the rolling road. Ammo had it fixed F.O.C. and back on the car in no time. It is good service like this that makes me even more impressed. Buy one. Link to comment Share on other sites More sharing options...
Anthony Posted April 1, 2003 Share Posted April 1, 2003 Hi, ran 7" techcraft with Rob's new engine and could just get through Goodwood ! Suspect main problem though is indiction Pinky now has the silencer, which is very well made and did not need re-packing after limited use on track and trip the LeMans. The unit is quite large and heavy and I am going Raceco route for new silencer. Nothing against Techcraft which did the job, they even do a larger 7" Goodwood one, and no spliting of welds I did have Seven Workshop make up a bracket to hold the silencer in place better than the std type fitting. Give Ammo a call before you do anything Anthony VX the real way sideways Link to comment Share on other sites More sharing options...
Paul D Jones Posted April 1, 2003 Share Posted April 1, 2003 I have a Techcraft one and it split aroung the inlet due to the weld having no rod put into the weld when it was made I have since repaired it properly no other problems. the repair can be seen here at the bottom of the page Paul. See My Car Here Edited by - paul.d.jones on 2 Apr 2003 00:05:02 Link to comment Share on other sites More sharing options...
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