Oh and to help you:
https://lh3.googleusercontent.com/-p...1024/HP-AF.jpg

only thing i can say is.... go to another dyno and i bet the numbers would be different. sometimes dramatically. dont know what to tell ya, i would be pissed if my Z made 245 lol.

:facepalm:

lol this threads going 4chan real fast..... all "you mad bros" and "trollin" and "facepalms" aside lets just get back on track. i dont care whos right in this childish debate. actually lets just make it simple. im wrong, lets move on. does anyone have any good places that have been makin comp heads, pistons and other things like that for the VQ besides GTM?

:iagree:

I still would love to see a N/A built 370. I don't understand the sticking point on numbers though. Every dyno is going to be a little different. hell it could say i dyno'd at 200hp, and if i slap on the SC and the same dyno says i now have 350hp then i would be quite pleased. Also I bet my Z would appear to be way low on power if I had it dyno'd since I'm at 4k feet. Anyways, have you decided how you are going to do this build?

although I am skeptical of your ability to build a 500hp n/a vq, I sincerely want you to prove me wrong cause I am a fan of n/a built power myself.

As far as other shops that make/stock the parts you're looking for, GTM is the only one I know of that has most of the stuff you're looking for. You could try calling a few other reputable shops and seeing what they could do for you as far as parts etc. (Z1, Forged Performance, HP Logic etc).

got a point there skeeter, never even considered the altitude thing. but yeah, i see what your saying. and ive had the hornet on a mobile "trailer" dyno once and it had quite a different number as the other i took it too. so it is what it is, who cares. i just want to be able to do it at the very least as a proof of concept. its not for braging rights or anything. i would just like to have something a little more "unique" you know? stupid expensive..... but unique.

seriously.... how cool would a 450-500hp all motor z be. and if in the future you wanted to get retarded with it.... your already set up for a platform that could handle in the 1k hp range. .... thats not what i want. but im just saying.

I know what you mean chii. Once I get mine paid off, I would like to get a used block and slowly build it up for RPMs. I would love to be able to comfortably hit 9k knowing the internals are more than up for the task. I would probably be looking at the same problems doing that as you would/will be for the 500hp N/A engine. My shopping list consists of lighter yet stronger parts which means $$$. I'm not looking to stroke it, since a longer stroke is in opposition to RPMs. I'll probably have to get a few (ok, more than a few) custom parts. The valve train will have to be lightened and strengthened as well. It will need stronger springs to prevent valve float. A custom dry sump setup would help as well. I'm thinking that when all is said and done, I would be looking at a $20-$25k engine, which in my mind would be worth it for my enjoyment. If you start a build thread let me know so I can follow it!

Turbos not for daily drivers? I have 342k mi, 203k mi, and 298k on three of the turbos in my driveway not to mention semis with a million miles on them. Finding a N/A engine that makes STRONG power with that many miles is rare. I could recommend a few good books packed full of sound engineering.

Btw, most of the things you will do to make high N/A hp is the opposite to what you would do for a FI build, so I'm not sure how you would get to 1000hp.

Enjoy your N/A build.

Who said anything about 1000hp? I may have forgotten something but iirc, Chii stated he was aiming for a 500hp N/A build and I personally don't have any power goals. I do love a good turbo setup but on this car I want to leave it N/A once i get into any major engine mods.
--edit--
never mind, I just missed the 1k hp comment. I'm not sure about 1k hp, but you could still put a couple smallish turbos on and run a low boost setup and make a decent bump in power depending on how good the internals are. I personally won't ever put turbos on mine though, so it is a moot point for me.

Hoping to hear back from a few emails I have sent. I'm trying to get a ground work laid out so I'll know what kind of time frames I'm looking at. From my research pretty much everything will be custom made unless you plan on using the GTM stroker kit. Other than that, unless we can use the VQ35 parts (which i don't see why you couldn't for some things), there just isn't much out there for our VQ37VHR.

ive sent a few emails to GTM as well, so far its been 2 weeks and no reply. well, good news on the job so far. might become a state trooper, out of 2500 aplicants 80 of us were chosen to go to the next step. physical test, knowledge test, and a 600 question psych eval...... it took like 10 hours and sucked a lot. But if i pass that, then the polygraph, and background "not a problem prior military" i will be goin to the academy in april. that being said there will be 5.5 months where i CANT spend any money since we dont get to leave lol. so i will have a metric **** ton of cash to drop all at once on the project and get it off the ground.

i :facepalm: everytime i see someone say 'slap on' a supercharger or turbos.

a fully built high revving NA motor is not at all set up for forced induction.

theres correction factors for a reason. when you dyno in extreme heat, cold low/high altitude, the dyno factors that in. Thats how people tweak dynos so that fools believe that their car made more power than it actually did. if you tell the dyno that your car is at 5000ft and its 100*F but you are actualy at sea level and its 60*f, you'll make a lot of power. you can get a dyno to read whatever you want.

:iagree:
for your sake, i hope the knowledge test has nothing to do with vehicles or engine building.

Chii, I apologize for not getting a response to your e-mail. We do receive a very high volume of e-mails and although I searched diligently through my inbox, I couldn't find an e-mail that seemed like it would be from you.

After having read through this thread, I can see you have somewhat more realistic expectations from a naturally aspirated build. As many members here have pointed out, Nissan has done a pretty good job of getting quite a bit of naturally aspirated power out of their V6 with a nice broad power band.

As most people here have pointed out, it doesn't make financial sense to do an all out N/A build on this engine. In fact, we have a G35 here that the owner has dumped copious amounts of money into chasing the big N/A build. In the end, we're putting our supercharger on it because that car has no bottom end torque and just doesn't make a lot of power, especially for all the noise it makes. All bark and no bite.

If you are really set on doing an all out N/A build on a 370Z, we can do it. Sure, it hasn't been done and very few would follow you because the cost/benefit ratio is a real turn-off when compared to FI.

Yes, we can open up the ports for more flow and install larger valves, but remember they have a cost: lost torque at low rpm's. Sure, you'll make up some of that lost port velocity with the added displacement and higher compression, but there is always a trade-off.

Now, I noticed some people have thought of ditching VVEL and going with HR (or God forbid, DE) heads and aggressive cams, but you're really throwing the baby out with the bath water with that move IMO. The VHR heads have a lot of improvements over the HR heads. Better combustion chamber design, better cooling jacket design to increase resistance to detonation and better port design as well. Sure, the VVEL system is complicated and is a bit of an unknown variable when trying to build an all out N/A build, but since it hasn't been attempted, I honestly think it's worth it to see how it plays out...at least once.

I'll be honest with you. I usually steer people in the direction of forced induction because most inquiries related to N/A builds are people trying to get an extra 100bhp for a couple grand. It's just not going to happen. The other argument I hear often is "reliability" and as several people in this thread have said, once you open up that motor, you have lost some of that OEM reliability. Especially when you start running higher compression and spinning the motor to high enough rpm to start making power.

Currently, we are working on a project in our shop that the customer put no limit on the expense to build a 500hp N/A engine. Here are some of the specifics of the engine:

2008 350Z HR
GTM Competition Engine with 3.8L of displacement and 9,000rpm redline and 14:1 compression.
Custom Cams
All variable cam timing is completely disabled
Individual Throttle Bodies
Dry Sump Oiling system

This engine alone is $35,000 and the whole project is in the high $50k range. It is a full race engine build and can only drink race gas and will have a peaky, narrow power band. Such a build is not street-able at all.

That's to give you an idea of what it takes to get 500hp at the flywheel on a naturally aspirated V6.

Got to be patient when you email GTM, they are very busy but will reply to you and answer your questions.

I thought a 300 question phyc test was bad! good job and good luck!


:eek: thats some bank son.

Mike, props to you for this post. :tup:

:iagree:..reps to mike

I dunno why, but reading that post made me want want a crazy n/a build even more! :driving:

50k and it's all yours. :tup:

Let's do it

right on, you put up the $$$, and I'll put up the car. :tup:



:happydance:

makes sense :ugh2:

This project suddenly sounds less appealing to me for some reason. :p

Put it on my tab at Harry's :p

:bowrofl:

Trollololol

don't be a quitter. :icon23:

Did someone say high output NA VQ37? :hello:

Loshak AM Performance 370Z Laguna Seca Grand AM Qual laps - YouTube

Plus it cost a hell of a lot more than 50k.

It's possible to make 500hp NA. Just look at Porsche. Been making high HP na flat six engines for years.
It's just a matter of $ and how far are you willing to go.

Then again they are making that hp with a race engine pretty much.

Yeah, he would be better off putting a nice V8 in there.

I'm still of the opinion that it would be fun to build the motor up for more revs :D

Fun yes, worth it money wise no.

who cares about the money. im not rich so dont get the wrong idea, but there is one reason i didnt hop on the bandwagon and get a camaro, mustang, or challenger. because when im driving down the road what do i see comming the other way? about 50 of those cars every single day, over and over. what do i NOT see? a bunch of 370s, ESPECIALLY a nismo like mine, ive yet to see one since ive been back in ohio AND pennsylvania.

Im trying to achieve originality, uniqueness, there are already so many TT and SC 370/nismo's out there its retarded, about 1/3 of all of them are already FI. well how many are NA builds? BESIDES all out race cars..... probably enough to barely need 2 hands to count in the country.

If you get it you get it, if you dont you dont. this route isnt for everyone, and to be perfectly honest i really dont care whether or not people think its financially sound. Is it your money being spent? no? well STFU and wait it out lol maybe im just trying to break off from the herd a little bit. After reading a lot of this i believe you that 500 is a little over zealous, so i will just go into it with a 100% open mind and not expect any one particular result, if i get 375whp cool, if i manage 500 somehow, awesome. ether way im doing it. who knows, maybe after i build the engine up, i might pro charge it. if a pro charger even exists for a 370. point? to be different, dont care about the scrutiny, dont care about the arguments that it seems stupid. Because if you wanted MY opinion i would say that anyone that put a SC on a small displacement V6 is retarded, but you know what? its there decision and im no one to say its not the right one.

If you dont have anything constructive to say, dont let the thread door hit you on the *** on the way out. No troll food here. But if you have a genuine interest to see how this eventually turns out or have any random new found information about a breakthrough in manufacturing parts i might need by all means speak up and stick around.

Good Luck! Who needs money when we have credit cards!

Ok do it stop talking about it and good luck to you.

You Know for lack of better words, your attitude ******* sucks. First off in your first post you start calling people with TT and SC tards with other posts following by you calling us other things. There are alot of people here that are trying to help you but you continue to be ignorant to the facts they are giving you. This is not a american V8 engine in this car. I love how you call us tards but when it comes to HP verse price, we clearly went the more practical way. Go rip your motor out your car and ******* build, and then come back because IMO I can't believe people are still willing to help you with your ignorant attitude.

:iagree:

Why are you okay with building a complex N/A car and not ok with swapping a Turbo or Super Charger? :confused: