Would it be possible to run a turbo (gated at 6psi) with a FMU, stock fuel pump and stock injectors? Do you HAVE to have emanage? Or are there other options? I'm not trying to go cheap I'm just trying to understand my options, Thanks for your time in advance

 

Yes,I don't think so,yes.

 

Youll definetly need a Walbro In tank Pump

-matt

 

Matt what about bigger injectors? or would the pump be enough? would you HAVE to get something like emanage to tune that or would a FMU be enough?

 

At very low boost levels you might get away with stock injectors (not stock pump, though), but why risk it?

 

Its always better to run a bit larger injectors and not a heck of alot of pressure. Sure you can run your 290's up to 95, 96, 97, 100psi and get away with it, but for how long is the issue.

-matt

 

Alright thanks i appreciate it, getting those parts wouldnt be a problem i was just curious anyways, Now, my other question is how would I tweak all that if it even needs to be, ... If I put in a pump and injectors and say a 12:1 FMU would the system run? Or do I HAVE TO HAVE like emanage?

 

You don't need an emanage, but you're going to want SOMETHING to tune with, like a wideband and an S-AFC 2.

 

alright thanks man, but if i had the tuner, would I need a FMU anymore?

 

Yes you always need an FMU unless your injectors are large enough to deliver the proper amount of fuel at whatever psi you're running. SAFC/Emanage is just for tuning and adjustment. FMU/injectors/fuel pump is so you have enough fuel going into the cylinders.

For the absolute barebones turbo setup, you'll want a walbro pump, FMU and tuning (SAFC+wideband).

 

So say I got the walbro, then FMU like you said. With a tuner, Id be able to run the system without injectors correct?.. because 400 bucks is a lot to drop on them ya know, again not trying to be cheap, just conservative and trying to understand all the possibilities. It wouldnt be possible or smart at all to try to run a system with just a pump and fmu correct?.. and finally I was just thinking if i hadnt got injectors, you could tune the fuel still for say a 6 psi turbo correct?

 

If $400 is alot for the things listed, this is not the project for you. You may want to consider going S/C to keep costs somewhat down. You need to read all the stickies in this forum and links from them to understand more about what you are wanting to do.

 

Not the point, but thanks for the input, and I'm on the internet every day researching this project actually, you have no way of knowing though so I'll cut you a break

 

You don't know what I have, so check my cardomain. You are trying to do this out upgrading injectors, more power to you. No one said it can't be done, you will run out of headroom with the stocks. Reread posts 5 and 6.

 

Is there any way to get a cheaper set than 400 though ? .. is a wideband absolutely neccesary too? What about the fuel pressure regulator, I thought the FMU would do enough.

 

In your case, fuel is a little more difficult to tackle. Your injector options are a whole lot more limited than, say, 4th gens and 5.5 gens.

 

How bout this, my setup includes pump, injectors, FMU and safc, would it run fine ?

 

What size injectors ?? What FMU disc ?? and how much boost ??

 

450cc injectors, by that D.... company can't member off the top of my head, 12:1 fmu, and The boost would most likely be coming from an internally gated snail at 6psi

 

Deatschwerks

 

true dat.. ha but matty whats your opinion man?

After that, I don't understand if/when a fuel pressure regulator comes into play. Doesn't something like a 12:1 FMU do the same thing?

 

If you get injectors you aren't goign to need an FMU or an FPR - fpr isn't a bad idea though. And you'd be crazy to run an SAFC with the prices of emanage blues these days, you can probably get one for less than an SAFC and it's a helluvalot more capable.

 

kk good point man, i hadnt really researched my management yet ya know? ... as for that setup what if i went kind of opposite.. like walbro fuel pump no injectors, THEN id need a FMU? and/or FPR ? .. am i getting this right? its kind of a one or the other option?

 

Just get the injectors, that way you aren't limiting yourself in the future.

 

injectors and then no FMU or FPR.. correct? And this isn't hard to tune once I have management like Emanage right?

 

You guys are making this too difficult and confusing for the guy.




In my opinion you should just run an FMU, Walbro fuel pump and about 7-8 psi of boost. That's all the fuel management you need for that psi and the car will be quick.

It sounds like you're a total newb to this so I honestly think you should stay away from any form of electronic fuel management at first until you get the turbo system installed and running well with all the bugs worked out of it (exhaust leaks, oil leaks, air leaks, etc.).

Later you can sell the FMU on ebay and then buy injectors and a piggyback injector controller like the AFC or emanage. That will allow you to run more boost safely.

This is what I did with my original 240sx and it was very quick and fun with just the FMU, Walbro 255 pump and about 9psi.

Fred

 

Alright I like the fact that your simplifying it, and Yes I am a newb, but this is how you learn am i wrong? How would you manage that system at all? You'd just have to get a turbo with a pretty descent spool range correct? Then really all you could tweak would be the wastegate and if I got one, a Fuel pressure optimizer perhaps to go with the necessary FMU?

Kind of unrelated, My system would not have an intercooler to start, member I'm just gonna try to get a good setup for a daily driver, then look into tweaking performance, but anyways would a BOV even be necessary? I know some people don't like them and I would only have about one foot of intake from the turbo outlet to the TBody

 

Yup, this is how you learn, it's good that you're asking questions in the right place.

Not sure what you mean by "manage", do you mean how would you adjust the fuel? Well, you wouldn't, because you wouldn't need to. That's the beauty of the simply turbo system you just install it and go, it's not the most effecient or the most optimized but that's not the point. The point is to get it on the road and make some decent power ((which it definatly will) and have some fun for a realistic amount of money.

I'm not sure what you mean by "spool range".

Yup, if you have an adjustable type.

Again, I don't know what the heck a "Fuel pressure optimizer" is, I don't think that exists??


Fred

 

1.) spool range- I know some may start with 1psi at like 3krpm and peak at maybe 6k rpm, correct? I'd just have to find one that would correspond with the maxima comfortably, any suggestions on what turbo to get?

2)The FPR is made by vortech I think, It would just be a way of tuning the fuel more precisely http://www.vortechsuperchargers.com/...optimizer.html

 

http://forums.maxima.org/showthread.php?t=360493 in here you can look at the different setups and the turbos used. The turbo that seems to be most popular with the 3.0 seems to be a T3/T4 for an "all around" performance turbo, but the A/Rs come into play on this.

That's definatly something you'll have to do HW on though. But this is an excellent barebones to the point explanation of that http://forums.maxima.org/showpost.ph...85&postcount=6 .

Also, the distance the exhaust has to travel affects spool time, as well as the # of bends it has along the way to the turbo. All else constant, the shortest and straightest way possible from the motor to the turbo will have the least turbo lag. Tubing diameter also plays a big role.

Bottom line, the tubing is the most expensive and important part of the turbo project. you can have all the great parts in the world, if the tubing sucks, you're whole systems sucks. So do HW on that as well, very important.

Good luck meng!

some1 just in if i got something wrong here

 

So this is what I was THINKING for a setup, obviously open to change
-t3/t4 (http://www.ssautochrome.com/level.itml/icOid/1489) second turbo down
-reverse Y feed pipe and downpipe from PFI to stock exhaust
-Walbro in tank 255
-vortech FMU 12:1 (This is the ratio I thought because I won't have injectors of SAFC/Emanage)
-Boost Gauge
-Oil lines

Obviously the bare minimum, But I'm not looking to go huge here, I want some descent power, and a fun project, I want it to run smooth and constistently, How does this setup look?

 

Sounds good except for the SSA turbo. Buy a name brand turbo with warranty if you are going to buy one new. Also, I'd recommend an intercooler for sure, cheap insurance against detonation. Also, the 12:1 ratio may be too much fuel, it's hard to say for sure.

One thing you could do is run the 12:1 ratio disc then get it dyno'd with a wideband and if your too disgustingly rich switch to a 10:1 disc. Obviously this is a basic, barebones and cheap way to "tune" the car and a lot of people reading this right now are laughing at me for suggesting it but it will work. A few short years ago this is what everybody did and it was fine.


Fred

 

I really think this setup is looking for trouble. FMU tuning is fine but a 12:1 disk is a crapload of fuel pressure with a 6psi reference. Even a 10:1 is pushing it IMHO. Pick up a set of 370s for $180 and have a much safer setup.

The fact that you're skimping on a couple hundred dollars on the single most important aspect of a turbo setup does not bode well.. With a turbo car you may end up spending $1000 solely on stuff that that you forgot to account for, or stuff you end up realizing you need in the middle of your install. Turbocharging on a shoestring budget is not something you want to get into in my opinion. I hope you have another car to use for when your car is not working, because even the most well thought out and perfectly executed setup hits snags - let alone budget setups built by inexperienced individuals.

About the turbo - do what Fred said. Don't use that SSA piece of crap.

 

sound advice, what would you suggest then for a turbo and intercooler kit? And aren't the stock injectors already 370cc? .. wouldn't you want the 450cc and who would you buy from?

 

The stock injectors aren't 370cc. No Maxima has ever had injectors that big. The ones Neal is referring to I believe are the purple-top 300ZX TT injectors.

Can he even use those injectors with the DEK fuel rail/lower manifold?

 

Crap I just realized you have a 5th gen - that means you can't use the z32 370cc injectors. Stock 4th gen injectors are 259cc and your stock 5th gen injectors are 290cc. 5th gens use top feed injectors and the 370s i referred to that MANY 4th gen guys use are side feed injectors, so those aren't an option for you.

If you elect to go with larger injectors, www.deatschwerks.com is the place to get them. Deatschwerks.com is co-owned by a long-time member of this forum.

I'm not a fan of high fuel pressure and small injectors - I think it's a dangerous line to be walking especially with injectors that have been used for however lon your car has been in service.

There are no kits available other than the PFI kit.

 

it says on deatschwerks site thought that the 370's "flow just like the stock injectors" .. i just thought that meant they were like the same size, just better.. i dunno really.. ha So what is more critical intercooler or injectors? Probly injectors right?

 

I don't know where on the site you're seeing that but regardless, 370s are A) not an option for you, and B) much larger than the stock injectors (of both 4th gens and 5th gens). As a very rough rule of thumb for a 6 cylinder motor at "normal" fuel pressures, the injector size in CC/Min is approximately the HP they will support. You have to start cranking the fuel pressure to get more hp out of them.

You have to make the decision as to whether or not you are willing to take the risks involved with running fuel pressures bordering on the "dangerous" level.

edit: found what you were looking at, see post below

 

Just found what you're looking at on the page. You're misunderstanding it. They are saying that the Deatschwerks 370s are sized to flow the same as OEM Nissan 370s, but the OEM Nissan 370s are not Maxima injectors, they are 300ZX injectors which alot of maxima owners (including myself) have used. They aren't in any maxima from the factory. Regardless, that whole page is side feed injectors which won't work for you, you need have top feed injectors.

 

ohhh alright thanks, I really appreciate your patients with me and the help. everyones gotta learn somehow no?


-soo, are there any injectors available for the 5th gen?