Ok so my motor has low compression across the board (125)

[Khiem]

Just for the record, my head just exploded. I would have never thought of anything like that.

Apparently neither has anyone developing Z32 turbo applications They would be amazing to have on our cars, providing the best of both worlds with stupid fast spool and freight train pulling ability.

hmm well im deffinately getting new turbos (that our upgraded) with my motor build
Could i go with sport 700's i like the way they look and the price is not bad could still run stock injectors and only would need a tune??

No stock injectors on anything bigger than the 530s, even 530s I wouldn't run stock injectors on, if you get 700s you need min 740cc NISMO injectors.

740s would be a good start, but IMHO, if you're looking for big HP, I'd seriously consider the BDE top-feed rail with the 1000cc/min ID injectors. Easier to swap out, huge flow capacity and lower relative cost.

What are the main things that would make a pump gas car with 600rwhp so $$$$?

You would need every kind of flow mod there is. Built internals, headwork, bigger turbos than you would need with a race gas tune. Race gas allows you to push the engine to it's absolute limit without the fear of detonation. Pump gas you don't have that luxury. With the saftey margins required for PG tuning, you lose some potential for the sake of safety. I'd be shocked it the GT28RS could hit 600RWHP with a safe tune on 93 octane fuel. Not saying it can't be done, but I'd be surprised for sure. Bigger than that and you're looking at Z1's GT800 kit, or SZ's EXP-90, both of which bring serious lag with them.

People often toss around 600RWHP or 700RWHP without knowing what that power brings. Not specifically targeting you OP, just saying in general. 700RWHP is where you start having manual transmission issues. Autos need to be upgraded long before that. Then you neet to worry about half shafts if you're drag racing. The safe limit for the OEM TT fuel pump is somewhere between 650 and 700RWHP.

IMHO, when approaching a build, it's always good to have goals. But rather than having a number as a goal, I like to think of what the car is intended to be used for. If you want a car that is super responsive and an absolute blast on the street, then I'd get the full 3" SZ stuff, 2.5" IC and inlet pipes, Sport 550s and call it a day. Maybe get Leader Gears if you can find a set. Then you'll have less lag than stock with a reliable 500RWHP all day long. If you want to built a drag monster, I'd get a built SZ auto transmission, EXP-90 turbo kit, all the aforementioned breather stuff, 1000cc/min ID injectors and BDE rail. That'll get you mid to low 10's all day with a decent driver.

More data (if you need it): my old 91TTZ with the 3.69 TT rear end with 320RWHP and 355RWTQ had a best 0-60mph time of 4.43 seconds in 55°F air. I haven't run my new car yet, but with 110+ more peak HP and TQ, and equal torque 1000RPM sooner, I expect very low 4s, high 3 second 0-60 runs. See below:



Long story short, there's a lot more to a build than a peak HP number.

dam tony your repsonses are the s***!! haha

[300ZXttZMAN]

YES agreed. He is always so helpful ^^^^^^^^^^^^^^^^^^^^^^^^^

[NolimitZ32]

I have gone through and looked at all my info and got a hold of some new info and it seems that the GT675RS kit from Z1 will actually outflow a TD05-16G, not by much but it does perform better and being that it is a BB turbo It will have faster spool. Just wanted to throw this up in case anyone found it interesting.

[300ZXttZMAN]

yea thats definately interesting but im going to be going with sport 700's my mind is set

[BigTDogg (MA)]

yea thats definately interesting but im going to be going with sport 700's my mind is set

6 of one, half dozen of the other.

Both use the GT28RS turbo, I'm unsure which A/R the Z1 kit uses, but the Sport700 can be ordered in the preferred 0.64 A/R housing. As much as I hate to say it, the Z1 kit includes a bunch more stuff which will make install easier. Except this:

Forget slotted oil drain lines, spacers, and leaks. All Z1 GTBB turbo kits now include the Z1 silicone turbo oil return line kit.

DO NOT USE SILICONE lines for any oil application. I don't care what they claim, they will still sweat oil. Slotted OEM drain tubes do the job just fine.

[legion]

The Z1 GT675RS kit also uses the 0.64 A/R housing. I think you use to be able to choose between 0.64 and 0.86 but I don't see that option anymore. Either way, I chose the 0.64 A/R for the faster spool up time and with upgraded manifolds and full 3" exhaust, you will literally be thrown back in your seat.

[NolimitZ32]

More info I dug up:
Z1 GT675RS - GT2860RS with .64 A/R Housing
JWT Sport700BB - GT2860RS with .86 A/R Housing

Basically these turbos are almost identical, the 675s will spool faster but drop off faster as well while the 700s will be slower to spool but will net you higher peak numbers and pull through the higher RPMs. You can get the GT2860RS from Garrett in their stock form in either configuration off the shelf. either of these are good turbos, personally I'd go with the 675s for faster spool or if my pockets were lined with Benjamins I'd do a custom twin S256 setup (Borg Warner FTW). But if you are looking for top end power than stick with the 700s

[vulcanrush]

I'd do a custom twin S256 setup (Borg Warner FTW).

fitment is the issue (manifolds, etc.), the "best" turbos at the moment seem to the the precision turbos with billet wheels.

[BigTDogg (MA)]

More info I dug up:
Z1 GT675RS - GT2860RS with .64 A/R Housing
JWT Sport700BB - GT2860RS with .86 A/R Housing

The Sport700's can be ordered with either turbine housing. When they were first offered, they were only .86, but for the last few years you can order them in the .64

custom twin S256 setup (Borg Warner FTW). But if you are looking for top end power than stick with the 700s

VNT > *.* If you're going to go custom, why not go superballercustomsweettits!!!

[NolimitZ32]

The S256 isn't that big physically and twins on a well built VG would net well over 600 on pump but alas you'd have to fab manifolds and DPs. But yeah the billet wheels are bad a** although I don't know if id pay the premium for it when the results for me would be negligible since I just want a nice fast street car and am not trying to shave hundredths of a second off my 1/4 mile or lap time. and If I could run VNT I would, thats like having 6 different turbos under the hood all at once. no lag and the power of a 3071. . . . yes please.

[300ZXttZMAN]

More info I dug up:
Z1 GT675RS - GT2860RS with .64 A/R Housing
JWT Sport700BB - GT2860RS with .86 A/R Housing

Basically these turbos are almost identical, the 675s will spool faster but drop off faster as well while the 700s will be slower to spool but will net you higher peak numbers and pull through the higher RPMs. You can get the GT2860RS from Garrett in their stock form in either configuration off the shelf. either of these are good turbos, personally I'd go with the 675s for faster spool or if my pockets were lined with Benjamins I'd do a custom twin S256 setup (Borg Warner FTW). But if you are looking for top end power than stick with the 700s

Can someone enlighten me with what the .64 A/R Housing does?? differently than the .86??? performance wise or just what is the difference??

Because i dont know and want to learn

[BigTDogg (MA)]

Can someone enlighten me with what the .64 A/R Housing does?? differently than the .86??? performance wise or just what is the difference??

Because i dont know and want to learn

I'd definitely let Google know that their webpage is broken

[300ZXttZMAN]

LOL, Im trying to call them and let them no but it seems as tho their phones are down also

[300ZXttZMAN]

Dang i really like that site its so interesting

[NolimitZ32]

Between Ztechz and turbobygarrett you can learn a whole hell of a lot about trubochargers.

"Basically these turbos are almost identical, the 675s will spool faster but drop off faster as well while the 700s will be slower to spool but will net you higher peak numbers and pull through the higher RPMs."

[Z31toZ32]

wow nice thread with a lot of good info. op id closely examine your budget before you roll those 700s. with 6k you are already in debt and would need thousands more to do the job right. what happens when something breaks?

[300ZXttZMAN]

wow nice thread with a lot of good info. op id closely examine your budget before you roll those 700s. with 6k you are already in debt and would need thousands more to do the job right. what happens when something breaks?

exactly thats why i have changed my route (till i get the funds) im going to run stock rebuilt turbos stock tt injectors and when i get the funds to upgrade to sport 700's ill buy them and the 95' wiring harness, injector rail adapter kit, and the nismo 740cc injectors then a good tune... Then ill run that for a little bit with stock breather system... Then ill purchase upgrade piping hks front mount... Ahh i will be so happy that day *smiles from pleasent thoughts*

i plan to have those mods completed by september..
I wonder how much rwhp that will be with those mods

[300ZXttZMAN]

Question? As far as the injectors go i remember someone was telling me to go bigger injectors what injectors should i go with if i didnt get the nismo 740cc

is 1000cc injectors nessesary??

[NolimitZ32]

For which setup? the 700s I would go with 850cc modded and flowed injectors just because I like the peace of mind of having some safety margin, some don't trust modded injectors so they go with custom setups with top feeds and BDE or Win Factory Rails. Specify what setup you are talking about and I can try to give you more info.

[300ZXttZMAN]

wow nice thread with a lot of good info. op id closely examine your budget before you roll those 700s. with 6k you are already in debt and would need thousands more to do the job right. what happens when something breaks?

exactly thats why i have changed my route (till i get the funds) im going to run stock rebuilt turbos stock tt injectors and when i get the funds to upgrade to sport 700's ill buy them and the 95' wiring harness, injector rail adapter kit, and the nismo 740cc injectors then a good tune... Then ill run that for a little bit with stock breather system... Then ill purchase upgrade piping hks front mount... Ahh i will be so happy that day *smiles from pleasent thoughts*

i plan to have those mods completed by september..
I wonder how much rwhp that will be with those mods

Nolimit those are the mods ^

[300ZXttZMAN]

acctually im plan to buy the the harness, injectors, and 700's, hks front mount all at the same time just to be on the safe side.. but thats what im talking about
sport 700's
hks front mount
Upgraded intercooler piping
tune
and not sure on the size of injectors

[NolimitZ32]

Ok well then its entirely up to you, like I said I like having a safety margin so for a car that would top out at 700hp id go with 850cc injectors, either http://www.importpartspro.com/poen85inni30.html with DW adapters or http://www.drivenauthority.com/shop/WF_Z32fuelrail.html or https://specialtyz.com/shop/300zx/bde-t ... l-kit.html

[BigTDogg (MA)]

For which setup? the 700s I would go with 850cc modded and flowed injectors just because I like the peace of mind of having some safety margin, some don't trust modded injectors so they go with custom setups with top feeds and BDE or Win Factory Rails. Specify what setup you are talking about and I can try to give you more info.

I'll be that guy; I would not use flow "modified" injectors. The link on the first page explains why.

For the GT28RS, either the Z1 kit or JWT kit, I'd consider either the Nismo 740s or the Injector Dynamics 1000cc/min injectors with the BDE top feed rail. Do not get the Lose Factory rails, there have been too many issues with their install from everyone who's bought them. 740's would be fine with meth injection and pump fuel or race fuel, but if you're running just pump fuel, you may have headroom problems. At that level though, you may need to consider an inline Bosch pump to boost your fuel pressure. You can email Greg at Specialty Z for more info on that.

[NolimitZ32]

This is going to be a never ending deal now hahahahaha, Modded vs non modded is the new herra frush vs drivable LOL.

In all seriousness, the main thing to look at when getting injectors modded is HOW they are modded, if the caps are drilled, I'd stay the hell away but if the caps are cut I would want to be present during flow test to see the spray pattern, if that and flow volumes check out there is no reason not to run them. Once again that article on the first page ONLY covers Drilled-out units.

[vulcanrush]

For which setup? the 700s I would go with 850cc modded and flowed injectors just because I like the peace of mind of having some safety margin, some don't trust modded injectors so they go with custom setups with top feeds and BDE or Win Factory Rails. Specify what setup you are talking about and I can try to give you more info.

I'll be that guy; I would not use flow "modified" injectors. The link on the first page explains why.

For the GT28RS, either the Z1 kit or JWT kit, I'd consider either the Nismo 740s or the Injector Dynamics 1000cc/min injectors with the BDE top feed rail. Do not get the Lose Factory rails, there have been too many issues with their install from everyone who's bought them. 740's would be fine with meth injection and pump fuel or race fuel, but if you're running just pump fuel, you may have headroom problems. At that level though, you may need to consider an inline Bosch pump to boost your fuel pressure. You can email Greg at Specialty Z for more info on that.

again, second to everything this guy says ---- what some people also do op, is run dual-oem fuel pumps, they're very high-quality (superior to walbro fuel pumps).
the hks front mounts aren't the best, i'd go with aspec massives smic's or the tdm fmic.

[vulcanrush]

In all seriousness, the main thing to look at when getting injectors modded is HOW they are modded, if the caps are drilled, I'd stay the hell away but if the caps are cut I would want to be present during flow test to see the spray pattern, if that and flow volumes check out there is no reason not to run them. Once again that article on the first page ONLY covers Drilled-out units.

when building a 700rwhp car, i wouldn't consider modded fuel injectors.
why would you get modded injectors when nismo740cc's are proven, and injector dynamics fuel injectors are the best injectors in the game?
it just seems like such a hassle to be there during flow test, etc., when you can just purchase ID fuel injectors (725cc's and up) which are simply the best.
i understand saving a few bucks on wheels or exhausts, but not fuel injectors.

[NolimitZ32]

The man asked for options I gave him options, if I were building a 700hp vehicle I'd be running custom rails (which I have designs for almost complete) with bosch units, and BTW this is taken directly DIRECTLY from injector dynamics website

"Injector Dynamics fuel injectors are the result of batch testing large quantities of specially modified fuel injectors, and then carefully matching them into sets based on their dynamic flow across the pulsewidth range. The result is vastly superior cylinder to cylinder consistency, even at very low pulsewidths."

As far as it being a hassle I completely disagree, if I just did all this work to my car (I do all my work myself unless I don't have the equipment ie boring, flow testing etc.) I would want to be present when they tested my injectors + i like seeing and learning the process + Injector RX/Engine Logics is only about 30 min drive from me so for me its not that much of a hassle.

[BigTDogg (MA)]

if the caps are cut I would want to be present during flow test to see the spray pattern, if that and flow volumes check out there is no reason not to run them. Once again that article on the first page ONLY covers Drilled-out units.

Flow in CC/min vs duty cycle is another thing to look at. If it's linear then it's good, but many times the spray pattern and the flowrate of modded injectors is not consistant, and can lead to driveablity and tuning issues.

I won't debate it with you, you've got your own perspective, I have mine

[NolimitZ32]

Hahah you know personally I wouldn't run modded injectors if I can help it but if money has to be saved somewhere then a decent set of modded units isn't a bad place to do it. If they are done right and test to spec like IDs

[vulcanrush]

and BTW this is taken directly DIRECTLY from injector dynamics website

"Injector Dynamics fuel injectors are the result of batch testing large quantities of specially modified fuel injectors, and then carefully matching them into sets based on their dynamic flow across the pulsewidth range. The result is vastly superior cylinder to cylinder consistency, even at very low pulsewidths."

you're taking things out of context.
if you're trying to IMPLY that ID fuel injectors have anything similar to the low-quality modified injectors that you see out there:
"We only sell matched sets, and within each set the dynamic flow rate (slope) will vary no more than +/- 1%, and the dead time (offset) will vary no more than +/- 20 microseconds which is equivalent to +/- 1% at a pulsewidth of 2 milliseconds.

It is this dynamic flow matching across the pulsewidth range that separates the men from the boys."
every tuner i've spoken to, from forged performance, etc. have mentioned how fantastic they are.
i'm not going to try to convince you, but to the op, buy high-quality parts, get high-quality results.
nismo740cc's are proven, and ID fuel injectors are the vendor of choice for the BDE fuel rails.

Hahah you know personally I wouldn't run modded injectors if I can help it but if money has to be saved somewhere then a decent set of modded units isn't a bad place to do it. If they are done right and test to spec like IDs

fuel injectors are one of the LAST places i would look to save money.
i'd run smaller turbos, smaller intercoolers, smaller exhausts (2.5'' versus 3'', etc.) first before i look to save on fuel injectors.