OK experts, need some assistance again: Engine management.

[AZhitman]

As you all know, I got tired of fiddling around with a half-a$$ed setup. I am in the midst of a full-on build, with pistons, rods, 50-lb injectors, T3/T4, Walbro, AFPR, HV oil pump, crank scraper, windage tray, block work, head work, and lots of other high-end goodies.

Basically, the engine is being built for 400rwhp, but I intend to remain between 8-10 psi.

I'm going for ULTIMATE reliability and durability, as well as LOW maintenance.

WIth that being said, I need some advice on engine management. I have heard everything from JWT, Biki, E-manage, SAFC-II, etc etc etc...

I don't want to spend a fortune, so if it's upwards of $600, I'll probably pass. I'd love the idea of eliminating the MAF sensor. Simple = GOOD. I want to DRIVE the car, not tinker with it...

Thanks in advance, if someone can ediucate this n00b on the ways of engine management.

[Florida240sx]

Enth. get an ecu tune. You can't get all that reliable with safc. anythign other than aem or ecu tune just isn't going to cut it. Might be able to the greddy ultimate, but for the price get your ecu tuned correctly. Could go with the JWT due to it being conservative tune you'd be safe. Enth is best way to go IMO. No extra wires.

[teddy]

An enthalpy ecu tune is going to be the best application for a "no strings attached" form of engine management. Just plug it and go basically. But, a ka-t tune from him is going to cost you about $600 on the dime.

If you're looking for something affordable, and that will allow you to fiddle here and there with the settings, I'd look at the e-manange blue. You can pick em up for pretty cheap with all the harnesses, get the support tool for free and hook it up to a lap top. It's pretty easy to learn as well.

As far as eliminating the maf, as far as I know the only way you can cut that part out and switch to a map is by using something like Megasquirt, SDS, Electromotive, etc.

[TrunkMonkey]

I'm going for ULTIMATE reliability and durability, as well as LOW maintenance.

WIth that being said, I need some advice on engine management. I have heard everything from JWT, Biki, E-manage, SAFC-II, etc etc etc...

ecu tune (jwt or enthalpy). it's plug and play, and should sit you right at or under your $600 limit.

almost any piggyback can do what you're looking for too, but they can be a PITA from time to time.

-demetrius

[C-Kwik]

Greg, within simple being a goal, an ECU tune is probably your best bet. A programmable engine management (piggy-back or stand-alone) can potentially yield better peak HP, but if you're already overengineering your motor and fuel system, you can spimply turn up the boost slightly if you want a bit more power.

[fiznat]

I agree with all others. For the money you're talking about, and for sheer simplicity- an ECU tune is pretty much your only choice.

As far as I know, there is nothing in that price range that allows you to eliminate the MAF.

Enthalpy seems to be preferred over JWT these days, although I hear that Scott (enthalpy) is extremely backed up. If you decide to go that route, let us know how you fare with his availability!

[AZhitman]

Yeah, I don't really care about peak HP - Like you said, I'm overbuilding the motor, and I see no need to get beyond 250-280 whp, and I'll probably run it at low boost in the summer.

Sounds like Enthalpy or JWT?

Next question: Can a JWT for a 95 DOHC be reprogrammed for a 93?

[Iamjohnhayes]

eventhough you have basically allready decided, emanage ultimate can eliminate your map, the only downfall beign everytime you tweek something you would have to retune but seeing how you dont want to touch it after its tuned.

however you not wanting to touch it also makes jwt or enthalpy tunes a great option.

Also I'm sure if JWT can make your usdm 240 ecu work with sr motors im sure then can do 95 on a 93.

[AZhitman]

So, for an ECU tune, I just give them all the info on my engine, and the ECU is set for those parameters?

[klattr1]

i know you prolly dont want to change any more parts....but i would get bigger injectors than 50 lbers and have the ecu tuned for it...then you wont ever need need anything bigger and will have all the potential in the world...

alot of people think that by having 72 lb injectors or whatever, that gas mileage is going to suck....which isnt necessarily true.

if you are concerned about gas mileage, just stay out of boost (which pushes more fuel pressure on 1:1 ratio)...when you floor it, the fuel will be there which is good...

just imagine having 25 mpg when you want or having enough fuel to support 550 whp....thats what i used to love and needed since I daily drove mine for a long time but abused it when i wanted!

as far as the ecu tunes go, you will prolly meet both goals with either JWT or Enthalpy...ive always used JWT because I've had experience with it and they change anything if I ever needed it. but then again, so does Enthalpy...Enthalpy KA ecu tunes werent around when I needed it though (~2003)

good luck with everything...simple is good and manageable!

[Structure240sx]

i agree with klatt about the bigger injectors

having a fully built motor then to be limited by fuel is just going to make u upgrade later.

i personally would add an safc to either tunned ecu. a few guys i know have had to use the safc to help out the idle on the ecu's. also it helps if u want to vent your bov or troubleshoot certain problems. this meaning you can see maf and tps voltage, along with safcII's having a knock meter

[AZhitman]

OK, I have an SAFC-II and an AEM UEGO A/F...

[Florida240sx]

Being you got a safc and wideband.Go with JWT due to time wise. Then you can make minor adjustments with your safc if you want to squeeze more power out of it. Because you got the wideband guiding your decision.

[david200095367]

I would go with an enthalpy ecu. if its for s13 its only $500.