550 whp 300ZX Coming Soon

[s13satch]

So my neighbor is building his own personal monster 300ZX. While I do not have the specifics of all the parts, here is what is being done:

"Stage 3" Turbo KitIntakeIntercoolerHigh Flow CatsExhaustStand Alone ECUInjectors Stage 3 ClutchStillen Flywheel (I knew the brand on that part b/c he already had it)Non-Turbo Differential

The shop that is doing work (IMO) are a bunch of idiots. They have had the car for 10 months now! A little time was needed to swap the twin-turbo motor from the jdm clip into his '93 no-turbo, but this work should have only taken a couple weeks. To top everything off, they did not do any internal work or inspection of the motor. Nor did they even replace the timing belt (38,000 on the motor). I thought this was the least they could have done to save him the money in the future since the motor was out of the car. They simply did a compression and leak down test. With that in mind, they will be tuning the motor for 18 psi of boost. Their goal is 550 whp.

The car should be done in two weeks. I will be home for spring break then, so if the car is done, I will get some pics. As of last week the car was finished being put together. Without tuning and at 6 psi, my neighbor said the Pirelli tires on the 11" wide rear wheels easily broke loose!

[freakonaleash1187]

so the internals have not been touched at all?! anything over 500hp will be pushing the stock internals almost over their limit. do you have any idea of what kind of turbo he is using? "stage 3" describes nothing. if they reach 550wph, i would be amazed.

[nsrZ32]

get more specs and info on it

[evildky]

it's a crap shoot, I hope it all works out for them?

[s13satch]

I believe the "stage 3" turbo kit is a Greddy kit. My friend knows little about cars (he just has a need for speed and money) so that’s why my parts descriptions are extremely limited. He has been asking me off and on for advice building the motor. I explained to him that after I did some research, I found that 500 whp was about the max for the motors internals. I then proceeded to tell him about what he should do to the motor based off of my engine building experience (Automotive Technology Management major). He told the shop what I said and they basically laughed at my advice. My friend thinks everything is going to be alright since the shop is sponsoring his car (although they are charging him $25,000+ for the parts, labor, and tuning so I don't know what they are giving him for having their name on the car). Plus the shop thinks that if anything would happen to the motor, the warranty from the clip-importer will cover it. I seriously doubt if the warranty will apply to the motor after work was done to it.

I wish him the best of luck and hope the car works fine.

[freakonaleash1187]

i wish him luck too. the shop sounds like a complete joke. do they even know what a Z is?

[nsrZ32]

so if the shop is such a joke and the car most likely will never make that power.....why make an excited post about it?

Sounds like the update will be when it blows up.

[s13satch]

Sounds like the update will be when it blows up.

That's quite possible. I will get dyno graphs and post pics nonetheless.

[freakonaleash1187]

definitely.

[s13satch]

I just got back from spring break. The Z was "partially tuned" at 15 psi. I drove it for a full afternoon and I must say that I was not impressed. The boost didn't kick in until 5500 rpm and below that the car felt no faster than his NA motor with I/H/E, pulleys, and JWT ecu. From 5500 rpm to redline the car did fly, but not as much as I expected. Also, the car had some random odd spots when driving; meaning it was not smooth. I think this problem and the lack of power is do to the fact that the shop was running an Apex'i SAFC 2 to control the motor. I can't believe they are using such a cheap controller for the amount of money invested in everything else. Best of luck to him once they get the SAFC fully tuned and the boost turned up to the new goal of 23 psi.

I have several other pics besides these 2 and in much larger format:

[s13satch]

...next

[nsrZ32]

good looking car

best of luck on the #'s

[jEzTeR]

Yeah keep us updated.

[s13satch]

Well the dyno results are finally in. With just the basic SAFC-II tune they did during the install and the boost at 13 psi (gauge reads 15) the car made 411 hp and 356 lb/ft to the wheels. Once the real tuning is done and the boost gets uped to 20 psi, they are still shooting for +500whp.

[s13satch]

Update!

I just recieved a text message saying that the car just put down 492.8 whp on 16 psi.

[nab911]

Judging from what you desribed, sounds like the dyno chart has a huge power curve up high and is **** for anything but dyno numbers... i dont know much about the vg but not many motors can take above16-18psi on stock internals. (unless you have an evo that is 28lbs stock.. wtf)

[Nick240sx]

s13satch......you wouldnt happen to be in southeastern pa because i was talking to some guys dad who has a 240 and how he has a twin turbo motor being put in his Z with the same expected HP numbers and that the car was taking a long time.....

[nsrZ32]

Judging from what you desribed, sounds like the dyno chart has a huge power curve up high and is **** for anything but dyno numbers... i dont know much about the vg but not many motors can take above16-18psi on stock internals. (unless you have an evo that is 28lbs stock.. wtf)

I've seen people make a lot of power on stock internals on the 300ZX. Only real weak point (beyond like 550 or so HP) is the pistons.

[evildky]

I put 24psi to my stock 183k junkyard L28ET with cast pistons!

and I've seen a festive with the mazda 1.6 turbo swap rumming 30psi on stock internals

a very important fact is the 18psi does not always = 18psi

the larger the turbo the higher the cfm the bigger that 18psi becomes

[WidebodyZ]

so the internals have not been touched at all?! anything over 500hp will be pushing the stock internals almost over their limit. do you have any idea of what kind of turbo he is using? "stage 3" describes nothing. if they reach 550wph, i would be amazed.

FALSE. Stock internals can take a beating. Many people have run close to 600whp with zero problems over many years. Where are you guys getting all your info???

[s13satch]

s13satch......you wouldnt happen to be in southeastern pa because i was talking to some guys dad who has a 240 and how he has a twin turbo motor being put in his Z with the same expected HP numbers and that the car was taking a long time.....

I am actually in western MD, Hagerstown to be exact. The Z was being worked on in a shop here in town. It’s on the road and running fine from what I gather. However, I have not had a chance to drive it since it first got out of the shop . I'll post some more updates if anything else develops (I think he was still shooting for more boost and chance to run at the drag strip this summer).

[partymonster 975]

I want to know how this will turn out at the end. I hear the Greddy kit can take 700hp. If I was running that I'd probably go with JWT 500 turbos. Does anyone have any knowledge of the Greddy kit? Is it any good, I've seen it go for about $5000. Worth it?....For a 500ish HP goal that is?

[WidebodyZ]

I want to know how this will turn out at the end. I hear the Greddy kit can take 700hp. If I was running that I'd probably go with JWT 500 turbos. Does anyone have any knowledge of the Greddy kit? Is it any good, I've seen it go for about $5000. Worth it?....For a 500ish HP goal that is?

Not worth the price in my opinion. Although it is a nice kit, the PE1420 kit is a far better deal. The GReddy kit can't make that much to the wheels and you'd better have it tuned well if you're looking for numbers close to that. The JWT500 turbos are not much larger than stock and won't make 500whp..more like 500 to the crank.

[partymonster 975]

So you know anything about the JWT sport 530 BB turbos? The Greddy kit is to much for me. I have a 500hp goal in mind, anything to much over that is just more then i'll really need.

[WidebodyZ]

So you know anything about the JWT sport 530 BB turbos? The Greddy kit is to much for me. I have a 500hp goal in mind, anything to much over that is just more then i'll really need.

Those would be more in your ballpark for power output and they spool up quick too.

[partymonster 975]

Do you know if they can put 500 to the wheels?

[WidebodyZ]

Do you know if they can put 500 to the wheels?

Close enough..if you're just looking to stake a claim then it isn't going to happen. But if you're looking for a quick spooling set of turbines that'll get you close to there..then those are your turbos. I'm personally using GT28R's, but I'm looking at 600whp+ but still decently quick spool. I'm all about response and I wanted more power, but keep a level of responsiveness which I'll definately have with the upgraded cams and the fact that the RB26 has ITB's.

[partymonster 975]

Will 555cc injector be enough? I hear that they don't flow enough fuel and 740cc injectors should be used? This is for the JWT 530 turbos.BTW: thanks WidebodyZ, you've helped me out a lot.

[WidebodyZ]

Will 555cc injector be enough? I hear that they don't flow enough fuel and 740cc injectors should be used? This is for the JWT 530 turbos.BTW: thanks WidebodyZ, you've helped me out a lot.

The 550cc injectors should be okay, but they'll be working on the high end of their duty cycle..which is the reason we recommend higher output injectors...to be on the safe side.

No problem..information not passed on is a loss for everyone.

[partymonster 975]

I would then go with 660cc injectors but the only ones I can find cost $1740. Would 660cc be worth the price or should I just stick with 555cc injectors? I can always upgrade to 740cc later. I'm guessing 555cc will be enough for me.

BTW: please keep us updated on the RB swap. Sounds awesome. I've only seen it once on a z32.