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Old 06-21-2007, 11:43 AM   #21
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I'd highly consider skipping the EMB or EMU and going straight for the MEGAsquirt. All things considered it may run you a few more pennies, but the overall adjustability will increase 10 fold.

then you can skip the FMU and fuel pump all together, and have a fully stand alone ECU for close to the same cost.

but yeah, for 190-210rwhp or so, 305cc injectors with 90-110psi or so will work. This will require the 190HP fuel pump, NEVER use a 255.

If the non-HP model is used, you wont get more than 85psi out of the pump, which isn't really more than stock ,but will just maybe be enough for 190rwhp.
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Old 06-21-2007, 04:44 PM   #22
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which megasqirt are you suggesting? I've had my eyes on 305's and a fpr with the emanage blue, but if the megasquirt keeps me from having to keep upgrading piggybacks then it sounds good but what makes it so much better than emu or emb? more points to adjust the introduction of fuel or does it also tackle retarding the timing if need be?
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Old 06-21-2007, 04:50 PM   #23
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either the PnP or a home built one.

both are a full stand alone...so any size injector, EBC, lots of support, etc.
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Old 06-21-2007, 05:04 PM   #24
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would something like this (MegaSquirt Programmable EFI PCB2.2 System - Complete Unit Part # MS122-C) preassembled work or no? would i need other parts to go with it for compatability or certain functions?
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Old 06-21-2007, 05:10 PM   #25
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you'd just want a MSI v3...assembled it's around $300, then add $65 for a harness, and about $100 for a boomslang, and another $30 for a intake sensor kit, then about $10-20 for random stuffs.

mod the board, wire the harness to the boomslang, and wire up the intake sensor, run a vacuum line, remove AFM, wire fuel pump ground and that's about it.
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Old 06-21-2007, 10:29 PM   #26
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braineack, you are saying, with the 12:1, all ill do is max out the stock pump, and it would be ok to do that?
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Old 06-21-2007, 10:36 PM   #27
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I will just wait the Megasqiurt PNP tested on Australian Model cars first :P

Why not going to a 255? I thought that it can flow more fuel at a lower pressure rate?
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Old 06-21-2007, 10:44 PM   #28
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they flow so much they overload the stock FPR's preload and deliver more bacse pressure than is needed.

do you really need a pump that delivers 600BHP worth of fuel at idle? Just because the pump flows more, doesn't mean you magically have more fule in the cumbustion chamber....the injectors are what supplies the engine with fuel.


car, for the time being yeah, a quick test of the pump will see what it can deliver. keeping the 12:1 will basically max it out, so then it's just finding the correct injector for the job at that point. if you are going to be making less than 170rwhp, then you'd be ok with 1.8L injectors.

however, the price of the recalibration set isn't that much, and neither is a fuel pump....it just depends really, do the math, and determine the fuel you need, if you need more than the stock pump can deliver, get a new pump. if the 12:1 will overshoot that pressure, than get the smaller disc set and get it close.
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Old 06-22-2007, 12:10 PM   #29
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ok, thanks guys, when I get back from camping, ill do some tests and some math. wish me luck with this whole thing! aha
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