Tuscan sports exhaust system
Discussion
Not sure if we would recommend de-catting a speed six, we were advised that this gives problems with sound wave transmissions as the empty cat can acts as a very large resonator. And of course it's not legal and you may fail a roadsde emissions test! What does it do those of you that have had this done?
Sorry to be a bore but we've had no feedback on this last comment of ours. From previous posts I am sure that a number of cars have been 'de-catted' now? What is the general consensus? Also have had an unsubstantiated report of a before and after figure for a rolling road run showing a 5% increase with a sports exhaust fitted, anyone else have any experience of this? Thanks.
hexhamhc said: Sorry to be a bore but we've had no feedback on this last comment of ours. From previous posts I am sure that a number of cars have been 'de-catted' now? What is the general consensus? Also have had an unsubstantiated report of a before and after figure for a rolling road run showing a 5% increase with a sports exhaust fitted, anyone else have any experience of this? Thanks.
Not sure of this, I've never had a before / after test on the tuscan (I've had a std tuscan make 373bhp so 5%on this makes it a "S" beater!!!!), but on the cerbie many of the sports tailpipes actually cost mid range .. so you make your car slower by making it noisy in this case. If you take the cats out you lose the positive wave refelcted back from the matrix front face (credit to richard prebbles friend at ilmor for this info) which may reduce the trapping efficincy at lower revs, but as the 4valve design means you can run softer cam profiles this may not be the issue it is on the V8 cars. The tuscan system is relatively free flowing so a 5 percent increase is very good with no ignition / fuelling changes if it's correct. Incidently, in common with many performance cars the tuscan actually makes more power at lower revs if you're NOT at full throttle (inlet reversion effects) - next time you're accelerating back off the throttle from fully open and see the increase in acceleration .. in this case fly by wire would make the SP6 much quicker than it is already .. the factory were supposed to be playing with this but I never heard anything else about it .. pity.
Yahoo,
Saw your car in Perth on Saturday night. Sounds amazing with the pipe inserts you were talking about. Where can I get them?
Also car looks good with the rear diffuser fitted. Must make the car much more stable at high speed.
I don't know why all tuscans don't come with them fitted.
Saw your car in Perth on Saturday night. Sounds amazing with the pipe inserts you were talking about. Where can I get them?
Also car looks good with the rear diffuser fitted. Must make the car much more stable at high speed.
I don't know why all tuscans don't come with them fitted.
joospeed said:Incidently, in common with many performance cars the tuscan actually makes more power at lower revs if you're NOT at full throttle (inlet reversion effects) - next time you're accelerating back off the throttle from fully open and see the increase in.
Superb! This is the kind of killer fact I can impress my mates with down the pub to prove I am a real driver driving a real drivers car!
Now I just need to work out why they're always busy when I phone them up to go out
mdf said: Yahoo,
Saw your car in Perth on Saturday night. Sounds amazing with the pipe inserts you were talking about. Where can I get them?
Also car looks good with the rear diffuser fitted. Must make the car much more stable at high speed.
I don't know why all tuscans don't come with them fitted.
Mdf, I have these inserts on my tuscan, got them from peninsula in Devon. I had them fitted there as i was in the area but i reckon you could do it yourself. All for the grand sum of £50!!!!
Oh and Yahoo that rear diffuser looks the mutz
>> Edited by Lagoo on Friday 29th November 13:37
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