boost question

[mparra11]

hey guys im new to this and i dont know to much about the z. i recently got my self a 90 tt with 75k miles on it im looking to upgrade parts. i have the following nismo 615cc injectors, z1 ecu upgrade, POP single intake, boost gauge, Greddy PRofec boost controller and im looking for a full exhaust system. My question is what would be the safe boost amount for this and also what would be the max boost level.

[NolimitZ32]

Stock turbos can only safely run 14.7psi above that you are blowing hot air and will ruin the turbos. It also depends on what boost the ECU was tuned for.

[300ZXttZMAN]

Welcome to Nico!

What are you boosting at right now?? Also has any maintenence been done?? Turbo's replaced? Timing jobs ect?

I'll move this to the general section so that more people can chime in.

Personally I would upgrade intercoolers before even thinking about upping the boost.

[mparra11]

Everything is stock right now. Well z1 Motorsport said that the ecu is tuned for the nismo injectors. Turbos are stock boosting stock right now. I just bought some spark plugs. What should I gap them to? Car only has 75k in really good condition.

[CRPZ]

I'd get some 525 turbos and make sure everything else is prepared to handle more boost.. I'd say keep running stock boost (8-9psi?) 'till you have everything else situated. Better be safe than sorry, ya know?

[mparra11]

I don't really want to upgrade the turbos yet I just want to work with what I have. Will it be safe to run 14.5 psi?

[NolimitZ32]

Use ONLY NGK PFR6b-11B plugs, they come pregapped, these engines run like absolute poo on anything else.

[mparra11]

Yeah thoughs are the spark plugs I got. I heard that u have to regap the
If ur upping the boost. So 14.7psi would be the max I can boost and the engine will be fine?

[CRPZ]

It wouldn't necessarily be "fine," you'll ruin your turbos faster.. I wouldn't.. I mean, I haven't up'd the boost from stock on my Z but personally I don't see why you should up the boost on stock turbo's.. that's just my two cents though.

[NolimitZ32]

You do not have to regap them if you up the boost, infact you technically can't regap iridium plugs. You need a tune if you are going to up the boost, otherwise you may have timing issues.

[mparra11]

Ok why on the z1 website it has different gap settings for psi? What do u mean by tuned? Isent that like a upgraded ecu?

[NolimitZ32]

Ok why on the z1 website it has different gap settings for psi? Because changing the Gap for different PSI is the poor mans tune, it basically alters your ignition timing but its unreliable and shouldn't be done with pregapped iridium plugs one way or the other. What do u mean by tuned? Isnt that like a upgraded ecu? Yes that's exactly what I mean, if its worth doing, its worth doing right, especially when it comes to cars as finicky as these.

Please don't use Z1 as your be all end all of 300zx knowledge, though they are a good shop, your majority of best knowledge will be found with folks like Greg Dupree, & Seb from Specialty Z as well as Kyle at IPP and Dane Miller with Houston Z. Yes there are many more knowledgeable people out there but these guys are the best and brightest.

[mparra11]

I'm sorry now I'm confused. So do I need to do anything with the z1 ecu? Do I need to move the timing form 15 to13? Sorry I'm not quite understanding. I don't know what I can do with the mods I have

[NolimitZ32]

everything-you-need-to-know-about-the-z32-t508376.html

-Do not go the cheap route.
-Do not believe anything Z1 says unless at least 2 other tuners back it up.
-DO NOT RE-GAP IRIDIUM PLUGS. . . .EVER!
-To up the boost you NEED a tune this means either you socket your ecu and get a chip from one of the tuners and install it yourself, or buy a whole new socketed/chipped ecu, or send yours in to get socketed and chipped.
- Not to be a complete d!ck but if you are asking these types of questions you shouldn't be messing with timing on your car. The best advise I can give you (because neither I nor anyone else is going to completely spoon-feed you) is read, read, read. Start with basic theory of how all components and processes in an engine work together ie: spark, timing, fueling, etc. Then read through the entire link I posted at the top. Then make a decision based on your knowledge and not what some douche (me) told you to do on a forum.

[mparra11]

Ok cool thank you I'll read up but one more question does turning the timeing form 15 to 13 degree sound right? That's that z1 told me to avoid detonation.

[mparra11]

Also With the nismo injectors will the boost safe level be at 14psi?

[300ZXttZMAN]

everything-you-need-to-know-about-the-z32-t508376.html

-Do not go the cheap route.
-Do not believe anything Z1 says unless at least 2 other tuners back it up.
-DO NOT RE-GAP IRIDIUM PLUGS. . . .EVER!
-To up the boost you NEED a tune this means either you socket your ecu and get a chip from one of the tuners and install it yourself, or buy a whole new socketed/chipped ecu, or send yours in to get socketed and chipped.
- Not to be a complete d*** but if you are asking these types of questions you shouldn't be messing with timing on your car. The best advise I can give you (because neither I nor anyone else is going to completely spoon-feed you) is read, read, read. Start with basic theory of how all components and processes in an engine work together ie: spark, timing, fueling, etc. Then read through the entire link I posted at the top. Then make a decision based on your knowledge and not what some douche (me) told you to do on a forum.

win. Win. WIN!

[mparra11]

TT Spark Plugs (6) NGK PFR6B-11B
PFR6B-11B
 

Z1 recommends this set of 6 spark plugs for all street driven Twin Turbo Z32's. One step colder than stock, Heat Range "6". Spark Plugs do not come pre-gapped.

Plug Gap Settings:Plug Gap Settings:

0.044" - Stock
0.035" - 15psi
0.031" - 18psi 
This listing is for six new Nissan OEM Parts. So is the gap 0.035?

[300ZXttZMAN]

Dude all this info your asking for can all be found in google and by searching nico club.

Read, Research, Reply.

You need to just start reading tech articles. You can start by reading this: dual-intake-filter-baffle-fab-resolves- ... 32611.html

[300ZXttZMAN]

After you get done reading that ^ (along with many other articles) you will have learned the basic functions of everything then feel free to ask questions.

Also don't get discouraged and leave nico club that is the worst thing you could possibly do.

We were all like you at 1 point in our lives so don't feel bad...

So now go read some articles

[vulcanrush]

I'd get some 525 turbos and make sure everything else is prepared to handle more boost.. I'd say keep running stock boost (8-9psi?) 'till you have everything else situated. Better be safe than sorry, ya know?

those are pretty average turbos, you can do much better, the jwt530 or 550bb turbos are probably the best street turbos.

[TTkickedin]

everything-you-need-to-know-about-the-z32-t508376.html

-Do not go the cheap route.
-Do not believe anything Z1 says unless at least 2 other tuners back it up.
-DO NOT RE-GAP IRIDIUM PLUGS. . . .EVER!
-To up the boost you NEED a tune this means either you socket your ecu and get a chip from one of the tuners and install it yourself, or buy a whole new socketed/chipped ecu, or send yours in to get socketed and chipped.
- Not to be a complete d*** but if you are asking these types of questions you shouldn't be messing with timing on your car. The best advise I can give you (because neither I nor anyone else is going to completely spoon-feed you) is read, read, read. Start with basic theory of how all components and processes in an engine work together ie: spark, timing, fueling, etc. Then read through the entire link I posted at the top. Then make a decision based on your knowledge and not what some douche (me) told you to do on a forum.

^ Good advice. but then this happened:

*Ignores and posts anyway*

OEM = STOCK. STOCK = OEM. Stock boost is 8-9psi. Don't push the stock turbos to 15psi. Buy the correct gap iridium plugs.

And please... V Dont do this yourself!!!! Consult a professional in person about your timing needs.

[mparra11]

I don't plan on doing this my self I just letting u guys know this is what z1 told. With the EPROM ecu chip change the timeing to 13 degrees to avoid detonation. Also the ngk spark plugs I got are not gapped there the pfr6b-11b

[NolimitZ32]

the pfr6b-11b plugs were commissioned by Nissan specifically to be manufactured for the Z32 chassis, these plugs were literally made for this car, sold as a nissan plug and ARE pregapped and whoever is telling you otherwise obviously doesn't know wtf they are talking about, and if you say Z1 than I will completely lose faith in those guys.

[mparra11]

TT Spark Plugs (6) NGK PFR6B-11B
PFR6B-11B
 

Z1 recommends this set of 6 spark plugs for all street driven Twin Turbo Z32's. One step colder than stock, Heat Range "6". Spark Plugs do not come pre-gapped.

Plug Gap Settings:Plug Gap Settings:

0.044" - Stock
0.035" - 15psi
0.031" - 18psi 
This listing is for six new Nissan OEM Parts. This is from there site

[NolimitZ32]

Let me make a correction, the PFR6B-11B is a platinum plug, still pregapped, http://www.importpartspro.com/nispplpfni30.html Stop quoting Z1. Can you use plug gap to adjust for higher boost? YES, should you? NO. its as simple as that man, you got your answer and people who obviously have much more experience than you are trying to help you but you keep kicking and screaming, if you dont want to listen to anyone here please by all means do what you want. There is always more than one way to skin a cat but there is only one way to do it RIGHT.

[mparra11]

I know thanks

[NolimitZ32]

Sorry if I seem a bit agitated but so many of these cars are going to s*** because of people not taking care of them the right way, and you having a TT it would pain me if you did something and it ended up hurting the car, we are all here to help but the best way to learn is to read read read.

[BigTDogg (MA)]

I will reply later tonight, some mis-information in this thread, hopefully I can clear it up.

Welcome to Nico Mparra11, good to have new members here!

[mparra11]

I know and I thank u guys its just also on the link u guys gave me on the all you need to know about a z32 it talks about regaping the spark plugs that's why I'm lost lol