Originally Posted by stimleck

this is totally speaking to me because of my limited mechanical knowledge, I could be driving around all summer lean or rich and have no idea. Heck I could be knocking away and not know it. Your kit sounds great plus I am in Canada, is they type of tuning you describe available remotely? By the way WE KICKED ASS IN HOCKEY

Originally Posted by stimleck

what order would you recommend while still using thru prop exhaust, or is the answer "don't waste your money unless you change the exhaust"?

Originally Posted by HaxbySpeed

The question of "is it worth it", is really a very broad one. It sounds like your setup is very well dialed in, and you may have no need, or desire, for a safer, better running engine. A lot of people seem to put too much focus on the fuel metering part of the comparison. In reality, the benefits of an efi system are much greater then fuel alone. Here's a few: The ability to run, or tame, a much more aggressive camshaft due to the ability to combat reversion through tuning and maintain driveability through IAC and precise timing control. Got tall gears and huge props, no problem. Unlimited programmable safety's - Inlet air temp climbing 'cause your'e intercooler's not getting enough water: Ecu can start pulling timing as it increases, sound an alarm, and drop the engine into limp mode if the condition persists. Fuel psi drop from plugged filter, etc: Ecu will sound an alarm, adjust fuel delivery to maintain safe AFR, and drop engine to limp mode if required. Got some bad fuel: Knock sensors will pull timing, sound an alarm, and go into limp mode if necessary. Oil pressure, water pressure, oil temp, engine temp, etc.. All fully adjustable to whatever number you're comfortable with.

As far as power levels, in any form of forced induction motor you can safely make more power with EFI, unless you spend a LOT of time on your carb's, and invest in a very sophisticated timing control system. On a basic NA motor, just bolting on an efi system probably won't make more peak hp then a well setup carb, or even as much sometimes. However, if you know what you're doing, and have the equipment, you can maximize cylinder to cylinder fueling and spark, adjust when the injector fires in relation to the position of the piston, and build any form of spark and fuel map you like. This type of tuning will almost always make more power. Even without getting crazy there are ways to find lost power. I was recently helping a very experienced engine builder who was tuning his first set of EFI engine's on his dyno. After a few pulls, he commented that the timing he found for peak power, resulted in a little drop in peak torque; he was still thinking like a carb tuner. I told him to leave the peak power area alone, and adjust the timing only in the peak torque area.. Bingo, same peak power, and more torque. This was on an 800+ hp NA 572. I've never seen an engine that wanted the same timing at peak torque as it does at peak power, or even the same AFR for that matter. Once you've experienced tuning in .25 degrees of timing, and .1 points AFR, you'll never consider carb's being comparable in any way to a good efi system. Wether or not it's "worth it" is totally up to the end user, there are lots of very driveable, reliable carb motors out there as MILD T and others pointed out.