minivin Posted March 27, 2006 Share Posted March 27, 2006 Just out of interest, is there much in the way of gas flow considerations on such diesel engines as 200TDi's et cetera, such as when tuning V8's and other petrol's (4 into 2 into 1 and other such design philosophies), or does the Turbo decide such issues as back pressure et cetera and exhaust bore and length become minor issues? Never dealt with any tuning on Diesels before Quote Link to comment Share on other sites More sharing options...
ROGUE TROOPER Posted March 27, 2006 Share Posted March 27, 2006 Dont do it!! Ok V8 dont like water much and will cost you £££ in fuel............ but the grin factor wont be the same as a Diesel Quote Link to comment Share on other sites More sharing options...
minivin Posted March 27, 2006 Author Share Posted March 27, 2006 maybe you need to fix your ignition problem and then let me have a play with it, it may seal the fate, of a V8 Quote Link to comment Share on other sites More sharing options...
ROGUE TROOPER Posted March 27, 2006 Share Posted March 27, 2006 Point taken Quote Link to comment Share on other sites More sharing options...
white90 Posted March 27, 2006 Share Posted March 27, 2006 bore has some bearing on the performance, I've removed all bar one silencer and fabricated the rest in the standard dia tube. not obtrusive(noise wise) and keeps out of the way offroading Quote Link to comment Share on other sites More sharing options...
minivin Posted March 28, 2006 Author Share Posted March 28, 2006 bore has some bearing on the performance,I've removed all bar one silencer and fabricated the rest in the standard dia tube. not obtrusive(noise wise) and keeps out of the way offroading that's interesting, sounds to me like the turbo provides most of the back pressure and the exhuast back-pressure design is very minimal, so your one silencer is just to "silence". hmmmmm Quote Link to comment Share on other sites More sharing options...
Bush65 Posted March 28, 2006 Share Posted March 28, 2006 Large bore all of the way from the turbine outlet to reduce back pressure. Only minimal silencing is required because the turbine reduces a lot of the noise. The greater the pressure difference between the turbine inlet and outlet, the better the turbine will perform. With steam turbines, it is common practice to use condensors to create vacuum in the exhaust, and increase the power. Yes the turbine does create backpressure. Smaller turbines create boost earlier, but cause more backpressure at higher revs, restricting engine breathing until the wastegate opens. Quote Link to comment Share on other sites More sharing options...
minivin Posted March 28, 2006 Author Share Posted March 28, 2006 Large bore all of the way from the turbine outlet to reduce back pressure. Only minimal silencing is required because the turbine reduces a lot of the noise. The greater the pressure difference between the turbine inlet and outlet, the better the turbine will perform.With steam turbines, it is common practice to use condensors to create vacuum in the exhaust, and increase the power. Yes the turbine does create backpressure. Smaller turbines create boost earlier, but cause more backpressure at higher revs, restricting engine breathing until the wastegate opens. ah yeah, I get it now! Quote Link to comment Share on other sites More sharing options...
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