Probably old too due to my newbiness, but has anyone tried this: http://z31.com/repairs/newengine.shtml

And if so is that an accurate conversion and instruction? Any Cons to the whole project?

 

There are a few of us trying this. Kalsc has a turbo maxima. I hope to have everything ready by december to go turbo. The max and Z31 are the same engine its just that we have the watered down version of it. Different intake & exhaust manifolds and injectors. Everything else is computer mapping. Check out Hekimian racing they make our engine putting out 300hp and its NA!

 

Wow that engine is a beast. But so is the price ($9k) unfortunately

Good to hear some people are trying it, I might have to be one of those people. Much cheaper than buying a new car like I was planning to do.

Also is it better to get the N/A engine at 220HP then turbo it yourself? Factory turbo jobs have never been very good. I am sure if you turbo it yourself you could get a lot more HP out of it than 80HP.

 

thats what im going to do. turbo charg a n/a 300zx moter and swap evrything from the 300zx turbo moter at the junck yard instead of buying evrything peace buy peace. im doing it to get a higher compretion rashio out of the n/a moterfrom a 9:1 to maby a 10:1. cuzz the turbo moter is like a 8:1 compretion.

 

Yeah, but the lower compression is nice because you can really dial-up boost without having to fear detonation as much. But yes, with higher compression, you can get more power out of the car. Just watch your EGT's like a hawk...too high and you got problems. :P

S

 

Yeah, there aren't too many people who can run a higher compression engine with high boost and keep it under control.

You would need to ensure you have a boost references retard, some type of water/alcohol injection, yadayadayada.

Nine out of ten times the really successful, high boost applications are engines that are between 8 and 8.5 to one compression.

If you trubo an n/a vg30e, you will only be able to push 5 - 7 lbs boost before you will run into problems. THEN!!!!! Even if you do get the detonation under control and want more boost, without machining your heads for lockwire head gaskets, you can look forward to blowing head gaskets left, right and center.

Hope this helps a little.

 

yea i i was going to run beetween like 7 psi of boost i whas going to keep the 300zx torbo blow of valve or get an eclips torbo blow of valve wich i belive runs 7 psi.
what do u guz think??

 

The stock 300ZX EMERGENCY RELIEF valve on the manifold releases at 9 psi I believe. Trust me, you don't want to have that popping on you as a measure to limit your boost. It simply robs power!! I can feel it when this happens. So I took the sucker out and used the pipe plug as is on the n/a 300zx intake.

I rely on the wastegate. I am using a micro adjustable valve rated from 3 - 30 psi with a lock ring. Works VERY well.

Back to the topic, it's you're call on the 'turbo the n/a' engine. But too high compression with too high psi and you will blow the head gaskets.

Not to mention, I don't think the vg30e or vg30et pistons are forged are they? If not, and you get deonation, say bye-bye to pistons. Really.

 

Well, I really doubt the head gaskets will be an issue at 8-12 psi. There are VQ guys running that much boost, on stock head gaskets, running stock 10:1 compression, and yet once to hear problems about a head gasket blowing. With that in mind....the N/A motor is what 9:1 cr, I don't think it's as big an issue as it's being played out to be. Plus I never heard of anyone really having problems with a blown head gasket on a VG either.

Also about detonation...it's all in how you tune your car....if you don't tune it right, run lean, then you got a problem. But with all the things available on the market, it shouldn't be a problem preventing detonation (FPR's, J&S Safeguard, EManage). Again...it's all in the tuning of the car. Besides, anyone serious to push the car that high on boost should be seriously researching to understand the consequences and the available routes to combat it.

S

 

I guess that depends on how hard you run your car. SOme people pu$$y foot it, others are ba11s out all the time. So yes, there are several variables.

I guess the angle I am coming from is one of doing the best bang for the buck and not wasting so much fricken money on gadgets, gadgets, gadgets. Krieky Brad Tyson was running mid 10s on his near stock 5.0 with a single turbo on a carbureted blow-through set up. Not bad!!! Last I hear, I think he ran 7.86 in the quarter.

What I am trying to say supports some of what Maximase86 is saying, if you can tune your car then you should be alright. If you can't, then you're in trouble. You can always spend more money on all kinds of management systems, but for what, just to get your a$$ kicked by someone anyway.

Low buck, high, reliable power. Too bad a blow through carb set up can't be put on the Maximas! LOL! Ever see the site www.toohighpsi.com

 

Sure it can! Convert over to a VG30i! I think they had that on the early pathfinders and hardbodies.

S

 

some one still should try a VG33ER conversion, if converted to RWD i think it will fit

 

No! RWD in 2nd gen. Why even bother when you could get a first gen for less than a conversion would cost?

VG33 would be a cool upgrade.
Yes our pistons are forged. This is how nissan builds there engines. To keep cost down of having to build to seperate engine internals. They just adjusted the connecting rods. But yeah they are forged. The 9:1 wouldn't really hurt the car unless like you guys said you drive like a speed racer, or you don't tune it right. Hell just retarding the timing by 2-3 degrees if your using reasonable PSI(5-7) should aford you a safe daily driver. As long as you know how to tune it the 9:1 won't really hurt the car.

Some of those niffty gadets will allow you to retard the timing based on the RPM's so that might be something nice for a turbo guy with a lead foot.

 

1. Dumb question:
What is a VG33 and what did it come in?

2. If you absolutely positively must have RWD, get an Infiniti M30. RWD coupe, VG30E motor. They are, however, a bit porky.

 

VG33ER super charged motor for a xtera's

the one i saw was a 98 i think, it came into work

 

They come in the Xterra and Fontier...all the way up to 2004.

S

 

Oh ok...thanx