from my reading on the subject , it's not just the cooling on diesel turbos that differ but the actual materials they are made from , ie they don't need to withstand such high gas temps.this is the reason why you don't see many variable vane petrol turbos much as the mechanism can't cope .
that said i found a turbo from a 2.4l diesel was of similar exhaust housing sizing to a 2l petrol , i also selected a turbo as used on the 1.4 tdci fiesta,peugeot,citroen engine to use on my 1.4 cvh , BUT the cvt box means the engine revs and hence generates gas flow similar to its diesel cousin! darren On May 31, 4:47 pm, "Jim Hearne" <[email protected]> wrote: > I'm not quite sure on your second question, Hamish would certainly know but > he's probably not on here at the moment. > You may have problems with overspeeding a diesel turbo on a petrol engine > unless it was from a larger capacity engine. > I know the theory behind picking turbos is very technical, and i don't get > on with maths !, i tend to just stick to using something from a similar spec > engine. > > I do know that diesel turbos need less cooling than petrol ones as the > exhaust temperature on Diesels is a lot lower. > As a result, most (maybe all) diesel turbos are just cooled by the oil feed > whereas most petrol turbos are water cooled. > If you use a diesel turbo on a petrol engine it may overheat. > > Jim > > -------------------------------------------------- > From: "nigelp" <[email protected]> > Sent: Tuesday, May 31, 2011 4:36 PM > To: "Quantum Owners Group" <[email protected]> > Subject: [Quantum Owners] Turbos > > > > > > > > > This is a general question not directly Q related. I am investigating > > and researching a couple of turbo projects. The first question is > > does anyone know if there are any differences bewteen a petrol and > > diesel turbo? I presume the wastegate valve will vary, but that would > > also be the case between different petrol types, I would assume. One > > potential project is a Peugeit 306 1600 engine for my nephew, the > > other, which is real pie in the sky, is my Xtreme. Have read Jim's > > Zetec turbo article a while ago and need to look at it again. > > > The second question is; does flow have to be considered in deciding > > which turbo? At first I thought that if a diesel was used with lower > > engine RPM it would require a lower flow (capacity times engine speed > > proportion) however further thinking seems that this wouldn't be the > > case as the higher the engine RPM the higher would be the turbine > > speed, therefore increasing flow. If anyone can shed any more light > > on this woudl appreciate it. > > > Thanks > > Nigel > > > -- > > You received this message because you are subscribed to the Google Groups > > "Quantum Owners Group" group. > > To post to this group, send email to [email protected] > > To unsubscribe from this group, send email to > > [email protected] > > For more options, visit this group at > >http://groups.google.com/group/quantumowners?hl=en > > > IMPORTANT NOTE: All information presented herewith is provided on an "As > > Is" basis, without warranty or the implication thereof. Neither the > > Quantum Owners Club nor the individuals associated with the Quantum Owners > > Club or in the preparation of the above information shall have any > > liability to any person or entity with respect to liability, loss, or > > damage caused or alleged to be caused directly or indirectly by the > > instructions contained within this or related message(s). -- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/quantumowners?hl=en IMPORTANT NOTE: All information presented herewith is provided on an "As Is" basis, without warranty or the implication thereof. Neither the Quantum Owners Club nor the individuals associated with the Quantum Owners Club or in the preparation of the above information shall have any liability to any person or entity with respect to liability, loss, or damage caused or alleged to be caused directly or indirectly by the instructions contained within this or related message(s).
