ahhh...that's the response type I like...
Personally I test drove the BMW's...I have driven many many BMW's...The only one I have not driven is the Z8, as we got one, and the senior techs got to drive it. I have driven many M5's (my favorite), M3's, all of the 3 series, 5 series, 7 series including the 750, nd only one 8 series since they no longer make it, and all Z3's. I love those cars. I worked with the techs to find otu what is wrong, or what isn;t wrong with the cars. What an awesome job I had. Too bad I had to go back to school.
I can pretty much drive anything...I actually find it hard to drive the cougar since the clutch is soooooo short, and I got used the excess clutch pedal play of german engineered cars. Oh well...
Since I don;t feel like copying and pasting everything you said, cause it'll take too long, but I feel you contradicted something you said.
I was saying in most cases a single turbo setup will be optimal, and your examples of twin setups are in 100,000+ cars, porsche and Ferarri. I'm talking about pretty much every other car. And if every car used porsche's twin setup, I'd completely change my view and say single or twin would be great. But on pretty much all cars you see on theroad every day, they would benefit from a single set up over a twin setup. It is true with the Supra, if you want to break the 1000hp barrier, the single turbo setup is the way to go...if you wan a nice mediocre 650hp...the single turbo is still the way to go...ha, only 650hp
About a twin turbo making more heat...unless you are using a ****ty and massively huge single turbo, two 16/18/20g or 2 T25's will need to be run at higher boost to make equivalent power compared to let's say a nice Garrett T3/To4e hybrid at a lower psi...therefore creating more heat, both in the intake charge, and in the engine bay itself. Making power is all ablout CFM...the more you flow the better. The lower psi you run, the less heat you make, so if you can flow (these are just made up numbers)...1000cfm at 8psi or 1000cfm at 12psi...which setup is more efficient? The twin smaller turbo setup will need to run at higher psi, therefore making more heat. It's true running 2 smaller turbos may have a smoother curve, with more power down low, but still, I thing the extra low end will be negligeable to the extra power made by the single larger turbo...also as already said by myself and BigProbe, that extra bit of lag from using the larger single turbo will really help with the launching of a FWD car. A supercharger is great since it produces power from low to high RPM's...the problem is down low where you may have too much ho and torque to get traction, and the same I feel would occur with low end power from twin small turbos.
About VATN turbos having problems...my info comes from sources from a Mercedes tech I know, along with many people I've been talking to since the idea of a VATN turbo kit has been announced on these boards. SOme of my info is hearsay, and other is actual hands on. Most believe it will be easier and cheaper to run a nice T3 Super 60, and forget about that low end power, since, heck we never had it to begin with. I agree with that. I hate to be limited, and I feel a standard Garrett T3 or some variation, will be less limited than the VATN...
I think I covered all I can cover. I'm typing out of memory of the previous long post, and the more I type, the more I forget.
On thing I'd like to add to anyone who wants to turbo a car. My belief for modding a car when a turbo will be involved. Optimize the engine and transmission for NA setup at stock compression ratio, then introduce forged low compression pistons and forged rods, and then the turbo. Get everything out of the engine first, and then turbo it. Also, if you do that, you can have 350hp with a turbo running at 5psi, compared to another guy who has 280hp running at 15psi, and causing damage to the engine. If Leo capaldi (sp?) gets 323 NA hp out of a stock duratec, someone else with head work can make some nice power, then turbo the car. Too many people go about it the wrong way. And people like that anger me, especially when they complain that the duratec engine sucks cause they are only making 250hp@12psi, and someobe else had 280hp all NA...
That's all...My goal is to run a consistent 13.9 or better in the 1/4 mile in my cougar all NA, and street legal. Also on the 2.5L block. I want to modify everything else other than the block it self, and see what I can do. Then from there I'll run a 3.0L setup or stico with the 2.5L, cut compression, make the engine as unbreakable as possible, and throw a turbo on then...
...
