Martins Stag Posted May 4, 2017 Share Posted May 4, 2017 I have noticed on the Robsport webb site they list "freeflow" exhaust boxes as far as I can tell they look the same as normal boxes. So are they standard size just with less sound deadening in? Has anyone used them and if so do they may any difference to either sound or the performance? Martin Quote Link to comment Share on other sites More sharing options...
Clive Posted May 4, 2017 Share Posted May 4, 2017 Probably a staright through design, and originals may be baffled?Straight through will be louder and may produce a tiny bit of extra power, but I bet you wouldn't notice on a "blind test" (except the noise difference) Quote Link to comment Share on other sites More sharing options...
Martins Stag Posted May 5, 2017 Author Share Posted May 5, 2017 But isn't it all about the sound with the V8! But I agree with you. Perhaps I should just open up my current boxes and take some padding out of it?Martin Quote Link to comment Share on other sites More sharing options...
Clive Posted May 5, 2017 Share Posted May 5, 2017 No. A certain passenger may not appreciate it. That decision is above your pay grade. Quote Link to comment Share on other sites More sharing options...
Martins Stag Posted May 10, 2017 Author Share Posted May 10, 2017 Clive that is a fair point but you can always dream ...Martin Quote Link to comment Share on other sites More sharing options...
CharliesStag Posted June 26, 2017 Share Posted June 26, 2017 While the power figures are a little bigger a certain series does cover what effect the silencers and cross pipes have on an engine. Some bits are quite surprising.If the figures in the videos below are correct I am a little gutted that I didn't ditch the H-Pipe when I was considering a budget and easy silencer fitment. I planned to just fit either some cherry bombs to the Stag or some straight through Jetex/Simons silencers. I however wanted to keep the H-Pipe for the improved torque from what I had read elsewhere but was keen to try it out.Warning, the American accents may get on your nerves.https://www.youtube.com/watch?v=fCio5K0WfHUhttps://youtu.be/bXQ-cXeri1Yhttps://youtu.be/Y7_lSU3D0jw?list=PLGvTvFzdMg_O2T3UdUEt5dIHutSOu7srE Quote Link to comment Share on other sites More sharing options...
Martins Stag Posted December 18, 2017 Author Share Posted December 18, 2017 So has anyone fitted a x pipe to s Stag and if so does it sound any better and was there any noticeable performance difference?Martin Quote Link to comment Share on other sites More sharing options...
mikeyb Posted December 18, 2017 Share Posted December 18, 2017 Stags normally do have a cross pipe just in front of the silencers! Quote Link to comment Share on other sites More sharing options...
StagNL Posted December 19, 2017 Share Posted December 19, 2017 Mike, I think there can be a marked difference between the standard H type cross pipe and an X pipe. Could be wrong though...Julian Quote Link to comment Share on other sites More sharing options...
Martins Stag Posted December 20, 2017 Author Share Posted December 20, 2017 JulianThat was my understanding to. But has anyone done it? I subscribe to Clive S view on modification that as long as it doesn't change the overall design of the car it is fine. My next door neighbour runs a bespoke exhaust service a I was dreaming about a pair of Freeflow exaust boxes plus a x crossover pipe. Martin Quote Link to comment Share on other sites More sharing options...
Flying Farmer Posted December 24, 2017 Share Posted December 24, 2017 When I first installed the Stag engine in my TR I didn't have a link pipe of any sort fitted. Eventually I fitted an H pipe. Just like in the link above it gained big time in bottom end torque, but I lost out slightly above 5300rpm. The losses were tiny compared to the gains, and fuel consumption improved by 10% so it was a no brainer to use the link pipe.I have not tried an X pipe because quite honestly it looks like far too much trouble for potentially tiny gains. The exhaust system in the link above had a link pipe about 3 feet long, the ones in my Stag and my TR are about 6 inches so they have more flow potential anyway I would have thought.Neil Quote Link to comment Share on other sites More sharing options...
Martins Stag Posted December 27, 2017 Author Share Posted December 27, 2017 Neil thanks for this I think I will take your advise and leave it as is.thanksMartin Quote Link to comment Share on other sites More sharing options...
OBE Posted December 30, 2017 Share Posted December 30, 2017 As someone who runs a dyno all day I found these tests really interesting. Also when I cut the silencers of my own Stag open i wondered how it managed to even make as much power as it did, the internal baffling looked really restrictive. I need to test some straight-throughs on it to get an idea of just how restrictive the standard silencers are. Quote Link to comment Share on other sites More sharing options...
Martins Stag Posted January 2, 2018 Author Share Posted January 2, 2018 OBE so that is interesting to know. Let me know how you get on and what you find out? Martin Quote Link to comment Share on other sites More sharing options...
StagNL Posted January 2, 2018 Share Posted January 2, 2018 I'm interested in the outcome of that straight through test too...Julian Quote Link to comment Share on other sites More sharing options...
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