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Post by devilbrad on Feb 5, 2004 21:43:35 GMT -5
Woo hoo, this is gonna be a GREAT board!!! Dont let it get run down by all the freaks who ask about neon lights and warranty stuff!! OK, on to the tech stuff.....building a 416 (.030" 340, 4" crank) for a 96 Dakota with a 5 speed trans, 4.10 gears, 3200lbs, forged internals, Edelbrocks new aluminum Magnum heads, a 200hp shot of nitrous and EFI. Will be a stand alone system tuneable from idle to valve float. Hoping to push truck into the 10 second zone. What size cam should I be looking for? I can run the ECU from the throttle position sensor instead of map sensor in case I dont have much vacuum at idle and its very lopey and nasty sounding (hint hint). What do you all recommend?
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Post by Don on Feb 6, 2004 1:37:16 GMT -5
You going to try and run it on the street?
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Post by devilbrad on Feb 7, 2004 2:00:41 GMT -5
Yes, it will be a weekend vehicle, cruise night and such. I can tune for the pump gas with the stand alone system.
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Post by Don on Feb 7, 2004 8:26:59 GMT -5
I'm a carburetor, all motor no drugs type guy.....what your trying to do is beyond me.
Hang in there I'm sure we have people to help you out although it appears you already know more about this than most people....I look forward to relying on your expertise.
We have more people from other boards joining us daily.
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Post by devilbrad on Feb 7, 2004 10:10:27 GMT -5
A carburator may not be out of the equation. It would save a ton of money, but driveability may be of a concern. I'm by no means an expert, but I suppose I know some areas better then others people may. I am a sponge for any tech stuff though!!! How about if I were gonna run that motor with a carb, what cam would you all recommend?
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Post by Don on Feb 7, 2004 12:30:27 GMT -5
I gotta get out to the shop right now.....I'll try and get back to this tomorrow
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Coil
Junior Member
"...well put a boot in your ass. Its the American way..."
Posts: 78
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Post by Coil on Feb 8, 2004 17:27:06 GMT -5
OK, been pondering this one for a few days. Where will you aquire the ECU at? From a car/truck with EFI? That may not work unless you have the ability to reprogram the ECU with your own specs on your engine. There are 1 or 2 companies out there that will custom build an ECU for any application and tailor it to your combo. But when you upgrade your combo, ECU must be changed accordingly. Are you wanting the ECU to control ONLY the fuel system for the EFI or will you be using it for complete control of the engine? (ECU stands for Engine Control Unit for a reason....) If the ECU is raped from a doner, what about the O2 sensor? Without an O2 plugged in and giving feedback, the ECU will either see the system as TOO LEAN or TOO RICH and try to adjust accordingly (either flooding the engine so bad it runs on only a few cylinders or leaning it out so bad that there is a melt down concern) If it is a raped unit, take everything including the MAP and TPS. Do not try to rewire them. The MAP gives info to the ECU for atmospheric pressure which the ECU uses to calculate ammount of available oxygen to calculate mixture. Custom system will be easier due to not having programing concerns for multiple sensors like the MAP, TPS, O2, knock sensor, etc. You may be able get an aftermarket setup and simply change to larger injectors......but the easiest......the almighty carb. No worries about if your injectors are properly balanced, how long the pulse should be, clogging concerns (which I have seen result in such a lean condition in aluminimum engines that they have melted down).....etc.....You can still goose it up with drugs if you have to.......but much wiser saying......"KISS"........"Keep It Simple Stupid"
Thats just a small taste of my maddness.....
Good luck with whatever your decision is. I work at a dealership (sorry, not a mopar one) and have seen WAY too many issues with the software in the ECU. Catastrophic issues......
#nosmileys
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Post by devilbrad on Feb 8, 2004 18:53:42 GMT -5
The ECU wont be pirated from any vehicle. Its an aftermarket setup that can be adjusted with a laptop computer from 0rpm to 10,000rpm, fuel, spark, everything but wipe your ass. He he!! It uses MAP, o2, ect, iat, and TPS, I will tell it how much fuel and timing to run at every 250rpm increment, it fills in the blanks depending on sensor inputs. They arent that pricey, but I think they are worth it, carb jets stay the same size, injectors spray patterns can be optimized.
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Coil
Junior Member
"...well put a boot in your ass. Its the American way..."
Posts: 78
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Post by Coil on Feb 8, 2004 22:11:10 GMT -5
WOW. Who makes that one? Sounds bad ass.....
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Post by devilbrad on Feb 9, 2004 19:52:10 GMT -5
More then one company!!! Um, Haltech: www.haltech.com FP performance: www.fuelairspark.com Accel makes em, Holley makes em, and there are some really really high dollar top of the line ones used in Formula 1 racing made by Motorola (I think). I am gonna use either the FAST system or the Haltech. Prices range from $1200-$2500 depending on options. Come with everything but injectors and the intake manifold to accept them. I already have both seeing as my truck was EFI to begin with and it has a Mopar Performance M1 single plane manifold drilled for injectors. Brad |
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Post by 66FormulaS on Feb 21, 2004 0:18:28 GMT -5
For your engine management system you may want to consider Simple Digital Systems www.sdsefi.com. Their setup is completely self contained. ie. you don't need a laptop to program it. |
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Post by devilbrad on Mar 22, 2004 20:13:39 GMT -5
But nothing like having a hard camming V8 and pulling the laptop out on the ricers!! Ha ha!! OK, say I decide to go with a carb instead of EFI, Don, what do you recommend for a carb and cam for the above mentioned motor and goals? Exhaust header size??
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