hey im looking into getting a t25 kit on my de. Its not going to be to extreme. Stock maf, 370s, 255 fuel pump, obvious lines, and 7 psi. At first i thought the jwt ecu was a necesity. After some searching, it seems some people say that the stock ecu will b more then adequte with the addition of an safc. Is this the case, can the safc tune adequetly for the turbo de? It makes sence, but im sort of skeptical. anyone who has done this please let me know whats going on. I am thinking if it doesnt do a good enough job i can jsut upgrade to a jwt ecu. please dont flame i searched, im jsut not quite sure.

short version: it'll run with the SAFC, but with the way the SAFC works, your ignition timing is going to be all wrong (i.e. not very safe). It's a semi-ghetto way of doing fuel management.

For the cost of the SAFC and the cost of dyno tuning, it'll end up costing about as much as the JWT but not nearly as reliable and it's fair to say it won't run as well.

Some guys have used it with reasonable success, but I wouldn't trust it to be reliable in a road racing situation. That's my opinion.

oh man i forsee a 5 page thread, thats if it doesnt get locked

pretty much confirmed my fear. i didnt really take timing into consideration. thanx man, thats a good point, with all the dyno time and what not, ur right id b better off to spend the extra couple hundred bucks for the reliablilty, and not to mention the simplicity of the jwt unit.

jwt > safc
jwt+safc = even better

I've run the SAFC + DE ECU for about 7 months, it put me in the mid 13 sec. 1/4mile @ 105mph. It got ok gas mileage, about 23mpg (I have a hard time staying out of boost, hehe). For the most part, I liked it a lot. For a car that isn't pushing much power, it was an easy choice for me.

For the last 3 months or so I've been using a JDM ecu. It runs smoother, cold starts are better, gas mileage is slightly better, but the part that got me was that the exhaust got quieter. I'm thinking it has something to do with the timing curves. I haven't had a chance to confirm with a decibel meter yet (I took readings before I had the JDM ecu in), but I wanna get back to the dyno to see if it puts out better numbers.

pretty much confirmed my fear. i didnt really take timing into consideration. thanx man, thats a good point, with all the dyno time and what not, ur right id b better off to spend the extra couple hundred bucks for the reliablilty, and not to mention the simplicity of the jwt unit.

There shouldn't really be anything to fear, honestly. I'm running a 3 bar, 370cc JWT ECU and let me tell you that it's pretty much "bolt on" with a T25 setup that you don't have to do much other than making sure you get a Walbro 255 AND a Nismo FPR and set it to 36 psi with vacuum and 44 without and your car will be driving like a champ. A SAFC is also a great way of doing it as well, but if you can use a JWT ECU, I'd go for that first, IMO. It's tuned for reliability, so if you want to extract even more power, just like BlkB14 posted, get both, but you don't NEED to get both. ;) Good luck!

Why even ask that question? SAFC blows something fierce, just not a safe way to do management on an NA ECU. Now, SAFC on a BB ecu would be better.

brent

that is what i would say too, bb ecu with safc, if you are gonna use the afc. i personally like the e-manage setup for the money, but to do it all right you should take into account some dyno time with either. you may just be better off with jwt, depends on where you want oto go with this in the future.

that is what i would say too, bb ecu with safc, if you are gonna use the afc. i personally like the e-manage setup for the money, but to do it all right you should take into account some dyno time with either. you may just be better off with jwt, depends on where you want to go with this in the future.

Just buy a second hand JWT ecu off the forum, Plug and Play and be done!

If you are asking the question, then just get a JWT.

good point

now everyones saying how you can use the bb ecu and run a safc 2 will this also work if i have the gtir motor and ecu with the maf,.. so will the timing be right and all that good stuff???

If you plan on running the AFC with a BB ECU like coach mentioned it wil be alot better. If you us ethe AFC with a NA DE ECU it will not be as safe. Keep in mind that the timming curve of the NA ECU will be harsh for a turbo car.

so will the bb ecu plug into the de harness or would you need a bb harness

If you have a B13 it will plug right in. I recommend emanage if you have the $60 extra bones or so, but the BB ECU with an SAFC would work pretty darn well.

Stabone: I have only seen 2-3 JWT ECU's go for sale on the forum under $425 or so. People don't mark them down at all. But by all means keep on searching.

Brent

If you have a B13 it will plug right in. I recommend emanage if you have the $60 extra bones or so, but the BB ECU with an SAFC would work pretty darn well.

Stabone: I have only seen 2-3 JWT ECU's go for sale on the forum under $425 or so. People don't mark them down at all. But by all means keep on searching.

Brent

I know, I once did that when I was going turbo, but if he is looking for the easiest option then get jwt and pay more. I can't mention other options because I haven't tried them, thats where you come in :)

well guys thanx for all the responses. i think im getting a better idea now. I saw that some of you are running the jdm det ecu on the de-t? Did u splice it together with your de ecu or did u jsut plug it in. could the det ecu plug directly into place, and if so would it run the right mixtures and timing for a de+t?

I've run the SAFC + DE ECU for about 7 months, it put me in the mid 13 sec. 1/4mile @ 105mph. It got ok gas mileage, about 23mpg (I have a hard time staying out of boost, hehe). For the most part, I liked it a lot. For a car that isn't pushing much power, it was an easy choice for me.

For the last 3 months or so I've been using a JDM ecu. It runs smoother, cold starts are better, gas mileage is slightly better, but the part that got me was that the exhaust got quieter. I'm thinking it has something to do with the timing curves. I haven't had a chance to confirm with a decibel meter yet (I took readings before I had the JDM ecu in), but I wanna get back to the dyno to see if it puts out better numbers.

was this on a bb det or on a turbo DE?