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Your observations about injector size pretty much follow what I said in my SDS notes post. I was able to max out the 30 lb SD injectors at relatively low boost, even with a 3 bar FPR. I'm using 440's now and have maxed them out at about 25 psi of boost with the stock turbo, but think with my T3/T4 and the Spearco intercooler, all will be fine.
Yeah, I'd say go with the 550's, if you are after serious horsepower, but I'd also say that my 440's are pushing the limit for using large high impedence injectors on a relatively small per cylinder displacement engine. If you go larger than 440 cc injectors, get the low impedence SDS setup and low impedence high flow injectors. Although, I almost hate to say it, Raul is right about the 2.1 intake and the large diameter of the runners, atomization at idle with the large injectors and up to 1500 RPM leave a little to be desired and then add in the low air velocity. I believe it makes the motor torquier off boost above 1500 RPM, but I think you may be better off with the smaller runners on a forced induction car.
Seriously, I believe that you already have a MSD setup and a good aftermarket APC box. So:
Unless you are going to race this thing seriously, like you get money for winning, not just doing it for fun etc, you won't notice any difference between the 3-E w/MSD setup and the 3-F system, a dyno might be able to find a small difference, but I have my doubts even about that. The coil pak is just something else that needs a home in the engine compartment.
You are going to need to make a choice, on whether to use APC or knock retard. IMHO, if you already have a high end APC box, use it, but still get the knock detection option W/O sensor. I pesonnally believe that ignition retard is the better system, but the high end APC boxes work well. You'll still have control over the whole ignition curve, this is what will really wake the engine up.
Particularly with the large injectors, at least the high impedence ones you'll want the fast idle option for warm up. I didn't get it, but hooked up my own circuit for it and if this motor ever gets A/C, I'll setup something for that too.
Do get the fuel pump relay option, but you don't need their relay, I wired into the stock system and fuel pump relay.
That's all I can think of right now, I wish you luck with it. Especially since this is a new motor that you need to break-in, I'd limit boost to base and be sure you stay on the rich side, I'd really like to see you do the break-in with the stock system. But when you are ready, I'll give you my numbers for fuel, MAP, etc, this ought to get you pretty close and be on the rich side, since my injectors are smaller than yours. Let us know how it goes. I hope this helps some.
, Sun, 10 Jun 2001 23:20:47
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