Originally posted by Rara:
Compression ratio? YOu think changing compression ratio is cost effective? Do you think its a little dial on the dash?


My compression ratio has already been changed once, I half expect to have to do something about it anyway even if I don't go FI. Is a gasket such a big deal??

Octane must come into this somewhere.

Originally posted by Rara:
On the high dynamic compression ratio of a forced induction engine, proper timing becomes critical, too much brings detonation, too little brings EGT's to hotter than the flames of hell.


And the degree of this problem is proportional to how much excess you're stuffing into it, right? So the more ambitious you are with your power goals, the tighter that squeeze would be, not so?

Originally posted by Rara:
If you are honestly that concerned about a given power level, you really shouldn't consider increasing the power level over stock. No, I am NOT kidding.


Great, you just invalidated most of the serious NA modders on CEG. Who limits themselves to 10% gains around here?

Originally posted by Rara:
For someone so concerned about durability of your trans, you don't seem to care about the life of your engine very much.


All I know is that people keep telling me that a tour ATX is way more at risk above 200 HP than a tour engine or tour MTX is. Are they wrong?

(I believe there was a recent article somewhere about a Focus project where they put on more and more boost with stock zetec internals until it finally blew up, and it got well up into the three hundreds.)

Besides, I just don't foresee wanting any more than 200. I might well be happy with 175, for that matter. Which means that this project is not going to justify the kinds of expense associated with a full balls-out turbo job.

Originally posted by Rara:
In all honesty, if what you want is more, and reliable power, sell your car and buy one that has more power stock. Your priorities are out of whack,


You don't know what my priorities actually are, or what my overall purpose with this is. You seem to be saying it's something nobody should even be interested in pursuing. That's not your call to make.

Originally posted by Rara:
...you are terribly concerned about the amount of hp to go through your trans, and are ready to sacrifice the life of your motor to do it.


Um, you just said I'm messing up my motor by LOWERING its power. That makes lots of sense.

It sounds like you would argue that there is no such thing as a legitimate forced-induction product that isn't intercooled. Nobody should ever use, say, an Eaton supercharger, or a non-cooled factory turbo. Is that your position?

Originally posted by Rara:
Quote:

Lots of people run single-digit amounts of boost without intercoolers and don't die of detonation, right?



Yup, and most of those throw in copius amounts of excess fuel to cool the intake charge (sort of like water injection). Most OEM's lean on this one heavily for factory forced induction vehicles; you should see the A/F curve for an 03 Cobra at WOT, its pretty fat, and that car even HAS an intercooler. But you can rest assured they are addressing the issue in some manner, even if it isn't the right way.


Well, this is genuine new information. Do factory turbos really run super-rich? They must pollute like hell if that's so...