It's also a recreational impossibility. I can see making a large (100-125 whp) increase in knock limit over popularly "understood" limits by increasing head flow and raising the point at which the engine makes and carries torque efficiently, but you're not hitting 700whp (in anything that traps like 700whp) with unleaded gasoline as your primary fuel. Here are my points:
- Stock injectors for gasoline and big secondaries for methanol, ok, but conventional water/meth results in a 15% increase in knock limit. On a conventional gasoline D16 with water/diluent injection, non injected 325 whp --> water/meth injected 375 whp for a stock cam/port car. You can even break 400 by a bit if you aren't alarmed by the engine's timing requirement dropping off like a stone because it's at the edge of knock and the gasoline is volatile. Add in some big port/valve mojo and a good cam and I can see brushing against 500-550 and it might even brush 500 on a heartbreaker Mustang dyno with corrections not applied.
- Dynamic compression ratio is an interesting thing, but the static rating of 9:1 is still a primary factor. You have to have a combustion chamber big enough to support the fuel/air mass that is burning inside of it and 9:1 on a small bore motor is pretty limiting. Period. End of story. Argue with Ricardo or Vizard or God Almighty.
Anyway, I can appreciate your point on everything else, James, and thank you for tossing it in. I'm glad that a lot of the 1.2's are working correctly for you and therefore others, but I know that there is a problem with them/some of them whether it's caused by an error in Bisi's design, an error at Web during grinding, etc.
JD, thanks for the education on water-meth injection. I personally have no experience with it. Your arguement here seems logical against straight pump gas. But based on my comments above regarding the use of unleaded fuel and the other options that includes, do you think it's feasable on say the Torco 108 unleaded?
Torco 110 + water injection on a 84.5mm B18C with cams, GT4094R, and a bunch of other fancy crap. Made 410 whp at 11.5 psi, ran into a wall in the mid-600's. All over the place from pull to pull at the same boost level, 630-670 whp. Plugs looked hot. Got on the phone, talked to some people. Sewell put me in touch with a DSM guy big on water injection - apparently it all goes down the first and last runner and totally bypasses the center two cyls, most of the big power water injected Mitsufeces have about 5 degrees yanked from the center two cylinders. I take this under advisement, and at -2.25 and -2.75 for cyls 2 and 3 respectively and at the same boost level the vehicle makes consistent 690s, and was able to get 740 with the injectors maxing out the last 500 rpms and AFRs going into the 13's.
Good luck getting a small bore D16 that has to run significantly larger cylinder pressures to make "the same" power as B-series to not hit knock limit before the B-series does. This is part of why I have doubts, although you make a very very good point that people are confusing "unleaded fuel" with pump gas. I fucking love vague statements like that, everyone who thinks inside the box seperates from everyone who doesn't.
All of which is beside the point... Torco's out of business, where are you getting their 108?
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Topic: oh boy.... MOST POWAR EVERZ (Read 112816 times)