300zxtt build

[brettman]

hey guys anothere noob here just got my 91 300zxTT wanting to get around 450whp out of it and i have no clue where to start plz help i no this probley has been covered be for but i looked a round and didnt find any thing i dont have a lot of money to blow ill probley be buying a part a month lol

[A Paratroopers 300zx]

Well it has been covered a lot lol, but I'll point you in the right direction. It's going to take a bit to get to 450. First things first...

*Intake (Selin dual intake system - if you're serious. JWT Single pop - if you're just starting out.)

*Exhaust (Full 3" stainless turbo back - if you're serious. 2.5" cat-back - if you're starting.)

*ECU (JWT plug and play tune with boost jets - All you need unless you are planning on building like crazy in the future. In that case you'll want a Nistune or similar.)

Should get you to about 400... small things like pulleys and such can be added later for extra power.

[brettman]

hey man thanks for the info i have a hks full exhaust would i need new turbos and injectrs to?

[vulcanrush]

hey man thanks for the info i have a hks full exhaust would i need new turbos and injectrs to?

yes, get new fuel injectors first before turbos.

[A Paratroopers 300zx]

hey man thanks for the info i have a hks full exhaust would i need new turbos and injectrs to?

yes, get new fuel injectors first before turbos.

No, you don't NEED them. If you plan to upgrade your turbos at anytime... then yes, you would upgrade your injectors to match. 450 is a pretty relaxed goal and not that hard to attain. Most of the common bolt ons can get you there. People have hit upwards of about 525 on stock turbos, but that's really hard to do.

[NolimitZ32]

^ and that wasn't on stock injectors.

[vulcanrush]

yes, get new fuel injectors first before turbos.

No, you don't NEED them. If you plan to upgrade your turbos at anytime... then yes, you would upgrade your injectors to match. 450 is a pretty relaxed goal and not that hard to attain. Most of the common bolt ons can get you there. People have hit upwards of about 525 on stock turbos, but that's really hard to do.

and stock fuel injectors max out at about 370-380rwhp, you don't want him to run lean, do you?
for non-engineers like myself, the "cc's" (555cc's, 740cc's, etc.) are an easy way to estimate how much power the fuel injectors can support.

upgraded fuel injectors are the first thing i would get.

also, 400rwhp is the safe limit for stock turbos, imo, 450rwhp required a higher octane fuel, and 525rwhp, the turbos won't last very long if you're going to keep driving like that.

those are dyno numbers, not every-day-driving-reliability numbers.

http://specialtyz.com/blog/?p=948 447rwhp+ required 100-octane fuel, 2.5'' aspec massives ic's and ic pipings, 3'' dp's, and upgraded exhaust manifolds....that's not that easy.

[300ZXttZMAN]

Yea I have heard from various sources that the stock injectors are almost and sometimes to small for the stock turbo's.

[NolimitZ32]

They are, vulcan is quite correct, in "normal" configuration (that's not peaking everything on your car to the max) injector static flow volume ie: 370cc will give you a ballpark of crank HP that the injectors will support. Yet for those of us who are engineers or have engineering background, we or at least I (like most engineers) like to have a fairly hefty safety margin, hence the 370cc injectors in a car tuned to "280 hp" as per the gentleman's agreement.

[A Paratroopers 300zx]

Yes, I do agree with y'all... injectors are a must. I thought this guy was only going for the basic "first" upgrades like the ones I listed. They aren't really required for an intake/exhaust/boost jet set up though. When I first got my TT, I ran the Nismo 555cc's on a stock motor just to be safe.

[vulcanrush]

I thought this guy was only going for the basic "first" upgrades like the ones I listed. They aren't really required for an intake/exhaust/boost jet set up though.

yes, they are really required for the intake/exhaust/boost jet setup that you're talking about.
that setup will probably put you at close to the maximum capabilities of stock oem fuel injectors, and you can run lean.

Should get you to about 400...

and without upgraded fuel injectors, you can run lean.
you were smart to run nismo555's.

para, great build, btw.

[brettman]

thanks guys so is there any way i can get a mod list that will get me close 2 400-450whp? like what name brand i should buy and what parts to get etc...? i no its asking alot but i need help lol most of you all ready have built cars and no whats what and what name brand parts to buy and not buy o yeah this is going to be a weekend car not a dragster lol i just love the 300zx just need more power and what parts i will need to support the power thanks very much

[vulcanrush]

first, 450rwhp on stock turbos+ isn't safe everyday, imo.
you're going to wear them out faster that way.
get nismo740cc fuel injectors (get your ecu reflashed for them), get 2.5'' ic's and ic pipings, 3'' exhausts, and you're set.

[NolimitZ32]

There are 3 ways to go about it, basically small turbos and all supporting mods:

1) 2.5" IC piping, 3" exhaust, injectors, bigger/better flowing SMICs, DualPOP, ECU tuned for all these things (since you would tune the ECU the dual maf translator isnt needed) LW pulleys and FW, aluminum DS, LW wheels. Thats for startets its not a complete list, (driveline mods and pulleys dont "make" hp they free it up so there is more getting to the wheels)
2) Bigger turbos, injectors to support them and ECU tune. This method is inefficient but would probably end up being a bit cheaper.
3) (What I am doing, requires lots of fab) I am getting 555BB turbos (sometime in the future), building IC piping with downdraft custom FMIC, building exhaust how I like it: this method is cheaper than even megan racing exhaust as long as you don't get raped on the T304 pipe (its very expensive in the US and Canada) I have a pretty long list of mods planned but I'm not gonna put it up unless you specifically think you will go this rout, I'm just super lazy and don't want to take the time. this setup should make 500 with ease and plenty of wiggle room on top because I like a fat safety factor.

Note: as Vulcan said making 450 on stock turbos isn't impossible but it does push the turbos beyond their efficiency threshold and into RPMs that will destroy them sooner then later and you will end up buying new (hopefully bigger) ones anyway.

[brettman]

ok so all i need is bigger turbos and injecters and tuned ecu to get 400whp right will it be releible? and is there any thing eles i need with that like cluch or anything? i all ready have hks eaxust and what is some good turbos and injecters to get i have a ebay turbo on my civic and its been great 4 3 years but i want to do the 300zx right

[300ZXttZMAN]

Good thinking ^ most ppl use the jwt sport series.


Im using the jwt sport 700's in my build that im preparing for just waiting on the parts to all come in and the machine shop to finish with the heads.

[brettman]

so i called godspeed auto salon today and they said all i would need to get to 400-450whp is get bigger injecters tuned ecu and boost controller and walboro fuel pump and they said it would be safe on the stock turbos does that sound about right?

[vulcanrush]

so i called godspeed auto salon today and they said all i would need to get to 400-450whp is get bigger injecters tuned ecu and boost controller and walboro fuel pump and they said it would be safe on the stock turbos does that sound about right?

brett, please read the posts above
400rwhp, i think is ok.
get nismo740cc fuel injectors, the stock oem tt fuel pump is better than the walbro one.
get 2.5'' ic's and ic pipings (aspec massives intercoolers) if you can, they're pricey, 3'' exhausts, and you're set.

[NolimitZ32]

in addition to the above, don't get your tech help from godspeed please, talk to people that specialize in 300zx. I have nothing against godspeed its just that they don't have the experience with this platform to be making suggestions like that. And yes bigger turbos, injectors and tune and you will make 400 easy, which turbos? well that's up to you. The smallest would be the "t28" hybrids, its a stock 4-bolt exhaust housing with a .60a/r compressor. I highly suggest staying away from e-bay and generic (even name brand) turbos as you will have to make modifications to either the turbos or piping to get them to work.

this is the smallest turbo that will make a "safe" 400 hp and actually last. http://www.z1motorsports.com/product_in ... ts_id=2913

[brettman]

thanks man whats the safe whp i can get out of the stock turbos? thinking about keeping them and just get some injecters and cluch and tuned

[vulcanrush]

Brett, your questions have been answered you gotta do your own hw.
if they're in good shape, 400rwhp is pretty reasonable.

[brettman]

thanks i been trying but 1 will say u cant get 400who safe out of stock turbos and then 1 says u can u no its hard to no who to blieve

[Razgriz767]

hey i just got a 1993 tt. ive been having electrical issues and have burned the original and another ecu. i have to get another before my mechanic starts to fix the problem. am i able to use an ecu from a 90 tt?

[brettman]

yes they are the same man

[Razgriz767]

so its safe to use it? theres no need to modify anything?

[brettman]

i would not think so but to be safe i would wait for a nothere repley im kind of new to the 300zx as far as working on them and what works and what dont

[NolimitZ32]

Brett, reason you are getting opposing responses is because different people have had different experiences, this to me means that 400 is the line where stuff starts to break. You could get lucky and be fine or you could end up like the other half and end up with dead turbos, basically 14.7 psi is safe boost for stock turbos, anything more and you're over-spinning them. Depending on the condition of your car this could be 330 hp or 380 (that may be a bit exaggerated)

Raz, if you have old style injectors (which is what should be in a 93TT) then a 90 ecu should work, do some searching around all the info about injectors is abundant.