MikeB7283

So I looked into their upgrades for a 280zx turbo and for starters they say that you need their upgraded ecu, mustang cobra maf sensor and their injectors. the ecu costs 595, the maf is like 325 I think and their 450cc injectors are like 100/each. Anyone know anyway to lower this cost at all? I looked into mafs online but I'm afraid that if the serial numbers don't match up then it won't work right. Also, I have no idea where to look for injectors. 100 each seems like a lot. They also said that there was some sort of 4 bar fuel injector they sell for horsepower upgrades exceeding 500 hp.

Any ideas?

NismoPick

Are you going for 500hp? If so, go MSnS or SDS. If you are looking for a mild upgrade, go w/ a Z31T ecu (basically the same swap as the JWT ... minus the reprogrammed ecu). Then you can upgrade to a NisTune.

Fuel injector options... see this thread: https://www.zdriver.com/forums/showt...&highlight=svo

MikeB7283

not sure what MSnS and SDS are, but i looked at that link, and it said that there are rx-7 450cc injectors that would fit? if so, do you know what year & model rx-7 those injectors are out of? thanks again!

snwbrderphat540

msns is megasquirt n spark diyautotune.com its a do it yourself standalone and its literally DO IT YOURSELF every last bit. SDS is simple digital systems also a good but much pricier standalone. not as involved as the MSnS and im sure a faster install. but MUCH MUCH pricier

MikeB7283

are the msns and sds better than just getting that jwt ecu upgrade? i guess i can see how it can be better as far customizing goes, but does that mean that the jwt package idea should just go out the door? not trying to sound sarcastic or anything, just want to know the best way to spend my money

NismoPick

Let's start with the basics (be realistic):

What's your hp goal?

What's your $ budget?

Are you mechanically / electrically inclined or will you have someone install all this for you?

Do you want a tunable fuel computer, or just a "one setting and drive" computer?

MikeB7283

hp goal: 400+
budget: 4k give or take
have mechanic friends that will help with the work
computer: whatever is better i will find a way to make it work.

NismoPick

I suggest MSnS. It's the best bang for the buck.

The JWT ecu is a good upgrade, but you are stuck with what they give you. SDS is awesome, but expensive @ $1k-$2k for a complete setup.

Are you going to rebuild the motor as well? At 400hp, you'll want it studded all the way around w/ an MLS headgasket, a better turbocharger, exhaust, drive train, & other goodies. 400hp for $4k is achievable, but to make a RELIABLE / LONG LASTING motor, it's probably going to be more than that.

MikeB7283

thx for the info. ive been looking at this rebuild kit on racetep.com they have this poackage for 1995 and they customize stuff to your specifications. seems like a good price for all thats included but i dont know much about that stuff.
yeah the car is going to be an ongoing project, i figure if i upgrade the ecu/turbo/exhaust/maf sensor/injectors and just dont turn up the boost too high i can still drive the car without shelling out for the engine rebuild just yet. intake is already done and an intercooler is being built by hks...(whether its good or not who knows. i was told it wasnt a huge one but its a front mount thats built specifically for the car so should just bolt on).

I'm sure that my idea prolly isn't the best but I'm just going off general knowledge.

I just called a local rx-7 tuning shop and asked them if they had any injectors to sell. They asked me if my injectors are top or side feed and high or low impedance. I tried looking through the site but searching through it on my phone is a lil pain. =p any chance u guys know? I told him that I think they're low impedance. He also mentioned that the primary injector on a 2nd gen rx7 is like 660cc on the primary and 800 something on the secondary....I don't know what all the primary or secondary stuff is but what should I be looking for?

Thanks again for all the input. I hope I'm not being too much of a pain! Typing all this out on my lil tmobile g1 keyboard is actually hurting my wrists!

MikeB7283

Oh yeah gonna upgrade to a 43gph fuel pump too

NismoPick

Not at all... this is what we're all on here for.

The 450cc low impedance injectors are from 2nd gen non-turbo RX7s. I sourced mine from a junk yard, but you can usually find sets on ebay too.

duowing

Basically I'd say if you're even thinking of going the JWT tune I'd recommend going Nistune. Just for the fact that you can run it stock from the start with the setup. As you want then you can completely adjust your Timing maps, fuel maps, cold start enrichment, target idle etc. When you eventually decide to upgrade your injectors maybe to bigger injectors, but not as large as the JWT it allows you to upgrade for those injectors. Also unlike the JWT you'll be able to connect a laptop up to the ECU and just log your whole drive. If you add a Wideband O2 Nistune is setup to actually log and map the A/F ratios into a chart that matches up with your fuel maps. So you can see what your targeted maps are set at and what you're actually getting and adjust from there. For the price of just about $400 I'd say if you're thinking JWT go for Nistune. Not to mention with Nistune it's constantly being updated and improved and Matt over at Nistune is very quick and very helpful. Unlike JWT which their priority has switched to later Zs.

mayitin

I have the JWT ECU for the 280zx/81T and I was not impress at all, it lack pick up speed around 80 mph, my stock ecu did better. I call them and they said I need all these up grades.a 1993 Cobra MAF and the wireing#f43z-14a411-a. For the injectors Bosh 280150036/atandarfj118 or borgw57512.
If you like to go to the junk yards look for a 1995 Mercedes450- 4.5 litre.

It is a lot of work and money, if you want the JWT I will sell you mine.
JWT have done their home work but man they are high.
Now I do have the JWT ECU on my Z32 and what a difference it change the car made it faster, I wish this was the case with the 280zxT But noooo you have buy a lot to get it right.
Mario

NismoPick

That's what the JWT ecu upgrade is... without the Cobra MAF and wiring changes, the car won't run correctly.

It's like making a pizza with no sauce or toppings... yummy. You'd have a lot of dough...

mayitin

You R right they just do not tell you that until way way way after....any body wants some dough.
Mayitin

NismoPick

Actually they tell you very clearly what is needed... http://www.jimwolftechnology.com/wol...%20UPGRADE.PDF

(bottom of page 2)

MikeB7283

is that msns thing hard to tune?

snwbrderphat540

well.. its all enter a value in a field and set it. done. lol. the problem is making it all right. get a stock ignition map in there then tune throttle values for diff RPMs in the fuel map according to an AFR guage and its no big. to get real results take it to a pro with a dyno

MikeB7283

what do you guys think of this engine rebuild kit? it's listed under: Z-car Turbo abd high compression n/a performance rebuild package. http://racetep.com/xmasspecials.html#dat

NismoPick

That's a nice kit. But you should talk to the machine shop before buying that. Who's going to do your machining?

SHADY280

looks like it comes with lots of goodies, i like that its comes with good pistons and head studs. i see only one flaw and that its should come with the tappets and new rockers. any time you install a new cam you need new rockers. if those were in there id say killer deal as tappets and rockers are gonna run 450 extra.

MikeB7283

not sure on the machining part. if i knew exactly what i wanted done, i know there are a couple places i could probably go to. there's also this local shop called Ultimate Z that does work exclusively on Z cars. i see them doing a lot of nice full restorations, but as far as engine work and tuning, im dont know that much about them. he tells me that they have both a 500hp and 1000hp project in the works.

at their rate of $100/hr im trying my best to. Look into ways I can do things on my own or find friends who can do a lot of the stuff which has worked out ok so far. still need to connect my greddy profec b boost controller though. wasnt sure if it wwas worth paying 200 for the install

NismoPick

Yeah... not when it's one wiring harness and two vacuum hoses.

snwbrderphat540

ultimate z ???? you live near me?

also they claim this and that but they mostly only deal with Z32's i've never heard anything about them as far as classic z's go other than what their website claims. my dad was using a local machine shop when i see him next i'll ask where he went. also just down the street from me i saw a 280Z being turned into a track car at this place called canal autorebuilders. was caged and had the headlight eliminating fenders not sure what else is getting done to it though now that its cold and its not pushed outside on the rack anymore.

MikeB7283

I live in Roselle. remember? i was asking you about the heater core...figured I would just buy a new one or just leave it broke =p