Base map for EM-4 w/MSD and 55 lb./hr injectors & turbo??
November 7 2006 at 4:46 AM No score for this post
Pinto Pro (no login) from IP address 66.214.116.196
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Im running a Ford 2.3 turbo motor, with SDS, moderate size turbo T3/T4 57 trim, 55 lb./hr injectors, stock V8 5.0 throttle body, ported upper and lower intakes, ported Essy aluminum cyl. head and 2277 turbo cam.
I made a bunch of changes, and now Im back to square one.
I need some sort of guideline base map to start from.
I do not have a wideband 02 sensor to tune with, so I need a map that will make it run decent enough to take it to the dyno tune shop.
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Re: Base map for EM-4 w/MSD and 55 lb./hr injectors & turbo??
Score 5.0 (1 person)
November 8 2006, 3:13 AM
75's?? hmmm, it may be helpful. I suppose I could scale the fuel back in a percentage fashion.
You must be running a fairly built/radical setup to be running 75's correct??
I have a new set of 72's that I installed and ran for about 5 minuites, but determined that they were going to be too much for my combo and replaced them with 55's.
55's should be good for 400-450 horsepower and thats what Im shooting for.
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greetings pinto pro, on sds's web site there is a formula / scale you can use to determen the flow rate and size of injectors to use.it is a simple way to confirm that you have the correct size injectors on you'r engine.now as far as a map to get you going.make shure you have set the start and engine temp settings are enough fuel to start the engine.i found that if you have numbers low like in the 30' or 40's are enough fuel to start the engine up.as far as the rpm fule settingsyou can start with a number in the 60's to 70's all the way down the rpm range to red line. if you are using a map sensor you can start the fuel numbers in the high vaccum (21.0-14.0) in the 60's and increase the numbers by 5 all the way through. from the 14's to 8'inches of vaccum set the numbers from 80's through 110. the next range would befrom 8.0 inches to .06 is the accelleration range. these numbers have to be slightly higher due to the demand for more fuel depending on the final drive gear ratio and tire size so i would start at the 8.0 inches at 120 and raise the numbers up on vaccum setting by 5 points. this should give you enough fuel to get it started and run.as far as the boost range turn down the waste gate to appox. 7lbs and start thouse numbers at 125 through the high vaccum ending at appox,185. the range is .061 through8.86 on the positive side(boost ). these numbers are on the rich side to help eleminate the running lean with out verifying the mixture. on this system you can use the oxygen sensor reading as a tool to tell you where you are . this system is the only one you can do this with.so you can cheat with out using a fuel analyzer, but you must use a wide band oxy.sensor. if this seems confusing e mail me and i can explain it to you in more detail.if the engine is not starting and was running before you could have also one of two problems, no spark or you have shut off fuel delivery by fuel cut off(map /rpm fuel cut off. let me know and i can walk you through the process. 4runner dave p.s. the e-mail address is my wifes address that is why it has a strange name)
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I too need a similiar tune with my big valve head,75lbs,and hx35 with stingerfmic,stinger header and big tb. I have just started for the first time yesterday and it idles but is dumping fuel. I made it that far and called it a day because I got it running. It is a car I have been building for a couplr of years now so even the motor is new.
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