Quote:
Originally Posted by axsaxoman
as for EGr ,that just buggers up everything as far as power goes
II would love to develop the DS3 engine ,but i don,t see the market for it .
even the non turboed ,non direct injection engine has a lot of advantages over the tu 5 ,but needs alot of things changing to make it release the extra potential it has over the tu5 .
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Cooled external EGR definitely has the potential to increase peak power due to increasing the knock threshold, but I am yet to see it enter a production gasoline engine, due to the higher EGTs than what is seen on a diesel engine and thus the materials required for the cooler make it un-economical (for now, but I still see it being an option). Plenty of research has been done to prove its potential. EGR is used on diesels for a long time to reduce NOx output, but has little to do with performance increase on diesels.
I definitely agree with you on the BMW/PSA princess engine. I think it has plenty of potential, but as you say it is going to be very complicated and expensive to develop further. You are talking approx £2000 for an aftermarket ECU that is capable of CVVT, closed loop boost control, DI injector drivers etc.... then there is the dyno time to set the thing up.
I personally would at turbo charger spec, as I feel they have not fully utilized the scavenging effect on the torque knee point due to emissions regs. If you were able to take advantage of the scavenging effect you could increase the compressor size to maintain low speed torque and also increase peak power.