EDIT: AND THE ENTHALPY BEATS ME BY REPLY BY A FEW MINUTES, MAKING ME LOOK LIKE THE CLOWN, HAHA
Originally Posted by TurboS13Hatch
Ok... what's your point about the turbo? Lag isn't all about turbine and compressor efficiency.. If you were to take this turbo, and put it on a engine with more exhaust energy, it would spool a little faster. Engines with higher rod/stroke ratios, tend to have softer exhaust pulses, and therefore, less exhaust energy to present to the turbine. The drawback is more lag.. the payoff is higher RPM, due to lower piston speeds, and higher volumetric efficiency. We wanted a turbocharger that would make 600+ without blowing 5000 degree air into the motor. We could have used a 35R, or a 61, but I didn't want to do that. I wanted to try this out... So far, it's working great for us.. almost 400whp at 14psi, and almost 3K worth of great powerband.. Not too shabby if you ask me.
The number one factor to how fast a turbo spools is mass flow across the turbine wheel. pulses, energy, heat, velocities, all this crap doesn't really matter NEARLY as much as plain and simple mass flow. If all these things mattered, people would simply wrap and coat their exhaust manifold and all these different ' 500 rpm's worth of spool ' would be truths instead of sales pitches. Your ' little faster' won't be detected on the dyno, or on the street.
Originally Posted by TurboS13Hatch
I don't agree with you about the SR/QR debate... I have brought FACTS to the table.. all you have done is tell me I'm wrong. If you have some facts to present to prove me wrong, please do. Otherwise, I don't really care what your opinion about it is. He has about 4K worth of parts in the long block.. Anyone who builds a SR with the RIGHT parts will spend just about the same..
So what you're telling me is, you spent 4000 dollars on that motor to get it to do all of that, custom intake manifold, custom exhaust manifold, custom all this, let me ask you then.
1) How many hours do you have into this thing?
2) What is your Labor charge per hour? Maybe norlandt or some of your other projects can tell us if you don't want to give it to us.
3) Have you added that to the total cost, because the SR is a bolt together affair that holds power quite nicely.
4) I'm a firm believer that the SR can be built just as strong for MUCH cheaper, and without needing to have any customization done. Show me your costs, so my point can be completely valid.
Originally Posted by TurboS13Hatch
Big horsepower is no longer my thing, I prefer flat torque curves, efficient turbocharger selection and cam choice, and response tune oriented motor builds these days. However, 661 isn't bad for spraying and boosting the hell out of it. Its a number higher than most, but what ended up failing on it, anyways? I've yet to see the threads rip out of this weak sand cast block the way many people say they do.