JWT ECU and SAFC?

[DammitBobby]

I am really missing the point of this! Why would you buy a programmed ECU spending 500bucks and turn around and yet buy a SAFC and spend more money to adjust what somebody has allready programmed for you? Wouldn`t it make more sence to buy an emanage for less money and use the rest of the money on a Dyno? Or even a better idea go buy an EMS that will control everything and be done with it. I am bored and it is cold and I miss my 240

[DRIFTEADOR]

my guess would be, because the jwt is tuned for timing and only requires minor fuel adjustment via afc (it appears the jwt isnt exactly tuned for max power either anyways) while the basic e-manage setup has poor fuel resolution and can't tune ignition. if youre talking about an e-manage with all supporting hardware it would probably be more expensive to buy and to tune as well. either way, I'll be going with e-manage

[nissanfanatic]

The JWT ECUs get rid the top speed limiters, move the rev limit in 5th up, and reprogram fuel and timing maps. The thing is, they are tuned for saftey so the run a little on the rich side. You can use the SAFC to tune a little bit of that fuel out and make some more power. I'm pretty sure that you could use it if you did a couple mods too.

[DRIFTEADOR]

move the rev limit in 5th up

whoa! whats the deal with that? how high is the rev limit in 5th? is it a good idea to rev higher where the load is highest?

[crzycav86]

I think he means it removes the speed limiter.

The rev limiter in 5th would be the speed limiter, and the jwt ecu removes that.

[nissanfanatic]

Well theres a speed limiter at 112mph and then a fuel cut(rev limit) at 5000rpm or approx. 120mph.

[DammitBobby]

What is the cost of Emanage with all the supporting tools?

[Structure240sx]

the emanage can be had for $300-500 withe everything.

the benefit of the jwt is that it can support much larger injectors than the safc or emanage can and also the cobra maf. the biggest injector you are going to be able to run on the piggybacks are 550's which i am currently doing. if you want bigger you need an ecu tune or standalone.

jwt used to be the only ones for ka ecu's. they would tune on the safe side so not everyone goes blowing up the motor. sometimes this is too safe for some so they tune it out with an safc. this combo is cheaper and easier to work wiht than a standalone with decent results

[HolyShiznit]

Also, sometimes the JWT ECU isn't tuned right, as was my case, and you blow your engine, as I did. So now after I break in my engine I will be dyno tuning out the lean spot in the ECU with my SAFC II.

[95_240sx]

Jon,

Did JWT admit they ****ed up your ECU tune?

Rick

[Projex240]

Theres also another problem with the afc and JWT combo.FWIK, the JWT ecu uses a subtractor circuit to read the voltage on the cobra ecu when its used in conjunction with the 72lb program. The cobra has an output of 5.5 volts, and when the ecu reads 5 volts, it basically cant correct anymore for the rest of the .5 volts that the cobra maf puts out(i hope im expaining this right). If you use the JWT 50lb program, then the maf is plenty for the setup, since the injectors will amx out before the maf does. If you use the 72 lb program with the cobra maf, then the sub circuit is necessary to make the most of the maf since the injectors will outlast the mafs capacity unless the sub circuit is there. Now, for the afc--it only corrects up to 5 volts. SO when the cobra maf puts out over 5 volts, then the efc cant process any more info for correction. SO it cant relay that info to the ecu. The ecu only reads a max of 5 volts (since the afc cant process anything over that) and cant correct accordingly, regardless of its tune(50lb, 72lb, stock, or JWT).

Using the afc is great for those using the Z32 maf or a 50lb cobra maf JWT program. Anything other than that, the setup is more than the afc can work with.

-Josh

[Charlie240sxt]

i was planing on going with JWT 50lbs and corba program with a S-AFC II on a stock block to boost me to about 12psi then upgrade later with bulit block. Is anyone having problems with this setup

[HolyShiznit]

Jon,

Did JWT admit they ****ed up your ECU tune?

Rick

Of course not, they insisted I set something up wrong. However, only two things were changed = ECU, injectors. Injectors were flow tested/spray pattern etc, we hooked them up and they were shooting off fine and in proper order. So that leaves only one more thing that could be different. The ECU, which ran lean in the tune, just as it tried to do again a couple days ago when I got the car running again. 13.2 A/F while in boost ISN'T good. I am not badmouthing JWT, they make good stuff, but not everyone is perfect.

[95_240sx]

Haha, I will badmouth JWT, I hate them. They have terrible customer service and I have been hearing AND seeing more and more horror stories caused by them. Sure, if I wanted a POP Charger I would get it form them, but most everything else sucks.

The only good thing I have seen was Vances car which made 283 on the 50lb program at like 12psi.

What damage did you do to it Jon?

Rick

[DRIFTEADOR]

lol, i like the name

structure240, tell me where i can find a complete e-manage for $300. i'll seriously buy it right now. I dont think even used would go for that. you'd need the blue box, ignition/injector harnesses, and support tool. other harware I would need would be a map sensor and either a laptop or the e-01 controller<---i would love that but i'd be afraid of thieves.

[HolyShiznit]

Piston 1 was perfect, Pistons 2 and 3 were cracked to pieces in between the rings, and Piston 4 had two cracks in it. Oh boy fun.

[Structure240sx]

wtb- this is jsut from a local forum to me http://www.importfanatix.com/F...11193

i know the kid, good guy. if you search around u can find it cheap. scotty-2-forty was selling a setup for $200 or less before i think.

also ryan, klattr1 had a bad experience with jwt, blew his built motor after 50miles.

i think i got lucky. i ditched my jwt ecu. i had white plugs at 10psi with a 740cc/z32 program. thats not saying its their fault. there has been quite a few success stories tho

[DRIFTEADOR]

damn, it wont let me access; you have to be a member. Whats the price? if its a good deal would you mind getting it for me, or just get me his contact info. tia