I just went to greddy.com and they had a pic of the prototype

350z with the twin trubo and it said 345hp it didn't say if that

rwhp but if it was I would be a little disappointed because on the

Intense Motor Sport stie it said 417 at the wheels and they said

it would come with inercooler and e-mangement system so 345

seems a little low for all that. If it is 345 I wouldnt pay more than

5 grand. Does anyone kown wich numbers are real?????

 

I was told 345whp@7psi by Greddy. I only have seen the numbers from Intense, but I cannot confirm them. They claim 417whp@10.3psi. Could easily be possible, but I have not heard it straight from Greddy yet.

-Jeremy

 

thanks for the info. Jeremy

Do you have any price up dates?

 

10 + psi on stock block getting scary.

 

Any boost on an engine as highly developed already as the VQ35 in th 350 is scary. I guess its just hard for me to understand why someone would pay as much as they do for the Z with a terrific NA motor in it and switch it to forced induction. Even on a excellent install with the best engineered kit, the added stresses and demands of FI on NA engines leads to serious reliability issues and decreased engine life, if not sooner than later, but there is no way around it. This isnt going to be popular with many people, but putting FI on an NA engine is a perfect way to ruin a good engine and cause you endless grief and heartache, I KNOW!!!If you want a turbo car, why didnt you buy one in the first place? Enjoy what you have, its an excellent motor

 

Kirkov:
I think you made a really good point, but seriously there aren't that much turbo car out there now. the only turbo car I can think of with a price tag around or less than 30K is WRX or Lancer EVO(not even under 30). and of course, you can always go for supra TT, but price on those are way too high, even used ones, or 300Z, 300GT, both of those are discontinued for a long time, the only car that's available are with high mileage.
I really with the 350z came stock with turbo, unfotunately they don't.............

 

Well Im not saying I dont like power, but when I hear people say" bolt-on turbo A makes 7psi and bolt-on turbo B makes 10psi, therefore B is better" I just dont think people realize what exactly goes into making a turbo car a turbo car. Its not just the snails, different manifolds, intercooler and piping. Besides lower compression, forced induction engines invariably have stronger rods, pistons, valves, ect, to handle the added stress. Increased oil, cooling, and fuel delivery capacity, different cams(high performance NA cams are not ideal for forced induction due to the amount of valve overlap they allow)not to mention completely different engine managment, in the case of the 300ZX turbo vs. non-turbo, very vital internal modifactions to stregnthen the block and oil squirters for the button of the pistons are vital for engine reliability. What bolt on kit will address things like this?

Look, I know there are tons of NA cars switched to FI making power, if the story ended there it would be great. I have done this to a car i owned i the past as well. Was it fun when it was working right? Hell yes. Knowing now what I know would I do it again? Hell no! My problem with this is, I could understand if you bought a used $3K Honda Civic, and popped the $1600 for the base Greddy turbo kit for it to have a cheap fun ride, hell if you blow the motor you can get a used one off of thepartstrader.com for a few hundred and swap it in on a saturday. I realise what you say about the availability of lower priced new turbo cars, but why would you buy a NA car costing over 30K, and the turbo kit that Im sure will be around 5K once available, brings the price to at least 35K for that amount of money you are better off getting a car that were engineered and built to run reliably with forced induction from the ground up.

One last thing, I had a Greddy kit on my Civic 5 years ago when i was a tech at Marin Acura, I had no problem working on my car when something went wrong with it and in the end it still ended up being more work and stress than the fun I got out of it. So if your the type of person that would rather drop your car off at the mechanic every time the check engine light goes off or the idle starts to hunt instead of trying to diagnose and fix it yourself, then a bolt on FI system will most certainly cost you money and the use of your car more times than you will be able to stand. Do it if you want, just remember you were warned

 

krinkov i agree with you, i don't know much about engines and the like, but, i wouldn't put FI in a car that was not designed for it, especially one that cost me this much. unless, if you take the engine apart and replace some components with the proper parts. again, i don't know much about this subject, but, comonsense tells me that you would be stressing out the stock engine more than it was intended to be.

krinkov, if you can answer me this question..since you obviously know more than me about this...how about programming the ECU? would that be safe? would you do it?

thanks,
Gerardo

 

The VQ35 has under piston oil squirters and an oil cooler from the factory. Trust me the VQ's are TOUGH SOB's. Lots of Maxima peeps are running 10 psi, I am running 15psi, on a stock internal VQ30. Its the same style botom end as a VQ35, minus the stroker crank and longer rods. I will agree that having lower compression pistons is a good idea, but the reason is so you can run even more boost! Ive been boosted for 35k miles, before that i was as juicer with a 100hp nitrous kit from 5k miles. I do regular compression tests on my motor, it now has 50k, and its just starting to show a tad bit of wear, pressures are in the 205psi range, they were 215psi 25k ago, factory spec is 180psi. I do regular oil testing and all wear shows normal when compared to NA motors in other Maximas. I should get well over 100k miles out of my VQ, some have said perhaps even 200k, basd off of my oil tests. The VQ motor is not the weak point, its the after market kit and/or the driver and or the installer. Crank the boost up over the kit's specs with out doing a fuel system upgrade and/or other necessary tweeks and you will probablly break somthing eventually, but that would be operator error, not the motors fault.

 

I supercharged my stang, which is fun when its working, but the fun doesn't replace the agony of breakdowns, or wondering if my car was gonna break on the way home ie.- belt shreding, and one more thing .....I WANT MY 350 NOW! ( no money)

 

I got an e-mail response from Greddy stating it's 345 hp at the FLYWHEEL, and that their stock car was 260hp at the flywheel (probably had very low mileage).

Dan

 

Im not saying you cant do it, or that it wont work, I just dont think many people are ready for the added amount of reliablility and maintenance issues that go along with putting FI on an NA car. It sounds like you keep on top of maintenance and you have reasonable expectations for the life of your engine if you are estimating it will get to over 100k, but ask yourself if you had to do it again, would you start with the NA car and FI it or would use the combined money of the car+what youve spent making it FI and get a factory built FI car? If you would do it all over agian, than more power to you, but you would be the first person I have met that would go through it again rather than buy a real FI car. Still, 15psi on a maxima must be a kick in the *** to drive!

 

Even though the VQ35 in the 350Z is already pretty highly developed, i feel there is a bit of untapped potential in it in NA trim. I say this since my 92 300ZX makes 222hp on its VG30 3 liter engine(74 hp/liter) whereas your VQ35 makes 287 on 3.5 liters(82 hp/liter) so there is only an 8 hp/liter difference between the high tech VQ motor and my old VG which is actuall just a refinement of a 25 year old design, and guys on twinturbo.net regularly get another 20hp out of their NA 300ZX with the Jim Wolf chip. I cant see any reason why the VQ shouldnt be making around 90 hp/liter(315hp) in NA trim, if you could get this from your VQ35 I wouldnt see any reason to go through the money/trouble of FI just for another 30hp, wait and see what Jim Wolf comes out with for the 350, hes worked wonders for the 300s

 

A Greddy kit (single 18G) allowed me to safely add 95whp (60whp@stock boost level) to my Honda Civic (10.2:1 compression ratio). I ran that setup for a year, drove the car every single day, and never had any issues. Now, if they can do that with a B16, I imagine we will be seeing WAY more than 30whp added to this VQ engine. Greddy builds their kits for reliability, not all out power, keep that in mind. Greddy kits are warrantied when installed by an authorized dealer. That is why it takes so long to develop these kits. In this case, Greddy is tuning the e-manage unit to provide the proper levels of fuel and ignition. They started out with low numbers, which were safe, and will slowly push the limit, until they find the best they can do, while still providing a product with a warranty. Everyone needs to just relax, be patient, and then we can all judge the finished product.

-Jeremy

 

That sounds very promising. 20 from the ECU, 5-7 from the K&N, 1-2 from the grounding = 26-29. 287 + 26-29 = 313-316. That being the case, I wouldn't be willing to spend more than a few thousand dollars for 30 extra horses from a turbo. And, thinking about it, a couple thousand dollars would be better spent on the S-tune or R-tune suspension.

A chip by summer, suspension by fall and finally some aero by winter sounds like a nice plan.

Come on Nismo/JWT, we're waiting.

 

I will agree with you that most car owners are not skilled enough to deal with the needed TLC that a DIY FI set up requires.

If a WRX or EVO was available here in 98 when I got my Max I would have bought one of those for sure. Since I need a 4 door for family and work and wanted a manual trans and min NA V6 power the max was the best choice for me at the time. If GTP's were available with a manual I would prolly have one of those now.

I dont think the VE/G and a VQ have one long block part in common, very differnt from what i know.

 

Yeah like I was saying, the VG was nissans first V6 they designed even before the first 300ZX, so they kind of had to keep re-engineering the basic design over the years to cover alot of bases, luckily it was a very stout iron block engine that was very flexible. The VQ is a recent design that shares nothing with the VG and was designed from the outset to be very flexible and modified for different applications, and Im sure future FI capability was one of those consideratoins, so it does have that going for it. But I still belive they will use stronger/higher capacity engine, cooling, oil, fuel, and engine managment, ect components in their FI engines that they would not have any reason to put into their NA engines.

I dont want to sound like the humbug that says your a fool if you do it, if theres a situation like yours where the car your driving meets your specific need for what you paid for it, then go for it. But with a car that costs as much as the Z, plus the cost of a quality bolt on turbo kit, it opens the door to a larger range of FI cars available that dont necisarily have to be as practical as a 4 door sedan.

 

Kirkov:
I think everybody agree with the points you made, but I believe alot of people would love to start with a factory turbo setup, but, too bad, they fell in love with the Z, and no turbo came with it. so aftermarket is the only way to go.

 

There is no way i would pay 5g's for just 345hp at the fly wheel

 

Wishful Thinking!