Jwt+s-afc

[ITR_KILLR]

If you have a JWT tuned ecu, can adding the S-AFC really make a big difference. What kind of setup requires this kind of "fine tuning"?

[Daunttless]

Its sort of one or the other, theres no point in getting a s-afc with a JWT ECU. If you want something with the ability for finer tuning you'll need a more expensive system.

[ITR_KILLR]

that was how I had always thought until I read the article about the CTC 240SX that used a JWT ecu and an S-AFC. It had 72LB inj, a Sard fpr. They claimed they used the S-AFC with the JWT ecu for "fine tuning" the carwhy would they need a fpr w/72 LB inj., the car made 420HP @20psi, well in the reach of the inj?????My guess on the afc, is that JWT tunes on the conservative side, so they used the afc to get more out of motor, but why use both?instead of getting stand alone?

[Daunttless]

For the cost you could get a stand alone, I don't know why they'd bother doing that. Also, JWT ECUs ARE tuned on the conservative side, not because JWT can't tune, far from it, its because they CAN tune. People have to take into account that a JWT ECU is there for people who can't do the tuning themselves, it allows a safe, easy alternative to piggy backs or stand alones. Due to variances in each engine, they can't tune to the limit, its better to tune conservatively lean rather than to the edge because each car is a little different. Its the same as people telling me "I know guys pushing 425rwhp on their SR20 easy." Well yeah, with the right tuning you can do it, however I have to take into account that most people want their engines to last longer than half a year, most people coming to me for parts, supplies, and tuning don't want to invest another 2000 dollars every six months to a year. Also, for every car that does it, thers another couple that will blow up. Thats why I suggest 350rwhp as the safe limit to attain on stock internals, if you want more spend the money to be safe. Back to the CTC thing, I don't know why they woudl bother with all of that, it seems rather redundant, especially for the cost... Of course, what do I know.

[ITR_KILLR]

I will most likely go JWT, but if I decide otherwise, what the best option in a tuner friendly system. I'm not really concerned with extreme tuning, i would drive the car everyday, so maybe an E-manage?

[Daunttless]

E-Manage appears to be a great option, I haven't worked with it personally, but Paul ( Movingviolation240 ) has it on his 400rwhp CA, and he loves it.

[ITR_KILLR]

doesn't it come with base maps, I'm no tuning expert, adjusting the TPS and igniton timing are about as far as I go, my main purpose for using it would be: changing inj, changing maf, and using the anti stall feature for unrecirculated bov, aside from that I'm not sure if I would be able to properly "tune" it

[ITR_KILLR]

also, I understand it can use a map sensor instead of just the maf input, so you could tune by boost, could someone explain how you would tune by boost, just think of me as an idiot in your explanation:thinker

[ITR_KILLR]

on the JWT+afc thing,

the idle on 720cc inj. is said to be pretty bad, with the JWT ecu, the inj, are just dumping too much fuel. maybe CTC used the afc to lean the car out at idle, making it idle more smoothly?

[89sxRCR]

a little out of subject but how much does the retuned jwt ecu cost? My Sr will be stock, with sidemount ic. First step is fmic, fuel pump, then iv been eyeing those much talked about jwt ecus. I havent seen a price yet though.

[mattback]

we picked up 60 WHEEL horsepower on glenns SR (JWT program, 72LB inj/ custom fuel rail / 4 bar fuel pressure)

by lowering the fuel pressure 3 pounds and by evening out the fuel with the afc (form 10:1 to 12.2:1)

yeah having a afc is pointless

[ITR_KILLR]

what turbo setup would require 72LB inj @4bar????

[I H8 UR DSM]

when you ask jwt about that, they dont recommend useing the afc with there ecu...i dont know exactly why , but that is what they have told people...

someone in NY has a program to reprogram the stock SR ecu's, and charges less than jwt...i havent seen the program myself yet though..

we run the JWT setup on our SER bluebird sr20det, with good results (12.3 on stock turbo, motor, intercooler, and a 2 1/4 exhaust, with cats, he he).

heres a story jay hass wrote the first time we brought the car, it was over a year ago (the car goes low 11's high 10's now)

http://www.se-r-list.org/archi....html

my 240 has gone 12.80's w/ stock turbo, stock motor, and stock ecu, with OPEN diff, with 2.0 60ft's.....

[ITR_KILLR]

we run the JWT setup on our SER bluebird sr20det, with good results (12.3 on stock turbo, motor, intercooler, and a 2 1/4 exhaust, with cats, he he).

how in the hell did you get 12.30's out of the stock T25, TMIC, and 2 1/4 exh.??????????? care to share the whole setup on that thing?

my 240 has gone 12.80's w/ stock turbo, stock motor, and stock ecu, with OPEN diff, with 2.0 60ft's.....

I'm kinda new to 240's, but that seems pretty damn fast for its mods also.

[I H8 UR DSM]

12.3 was a completely stock bluebird sr20det in a sentra se-r with slicks...some thanks will go to jay haas, he knows his stuff, and helped out with timing, spark plug gaps, tire pressure, shift rpm, etc at the track since it was our first time...it went 12.8, with some more play, and weight reduction we got it to the 12.3 (which i think is the fastest on the stock t25 anywhere i ever saw)....

it has a t3/t4, 550's, z32 mafs, 3" exhaust, downpipe, etc now, and is much faster : )

my car went 12.80's, but i do have mods, like exhaust, downpipe, fuel pump, big intercooler, cooling, etc...but the motor, ecu, and turbo are still stock....

yes it is fast ; ) for stock....

good driving, great tuning is what i have to give credit too, as well as good SR20det motors : D

[ITR_KILLR]

what psi were you running at with those mods, (12.8) @1bar?