complete engine overhaul questions.

chii370

thedreamer, its pretty safe to assume they didnt start with a 370z that had 240 hp, since this is an machine built assembly line motor. pretty confident somewhere around what 99% of them make, aside from the nismo model like mine.... but even then its just a simple matter of average subtraction. my engine dynod at 368.5 crank. and most base/sports are about 350 crank. THATS where i got the number of 300 RWHP, because thats what just a bit lower then mine. YES i was guessing, but i was using common sense. if you have a 370 that makes 240 rwhp somethings wrong, you got f u c k e d. so 45 came from the 414 and my 368, i was assuming that was CRANK horse, because otherwise they would be lying because its not even making the advertised 500. even then.... using the same % loss from our base motor, take mine for example, 368 to 300-305 roughly rwhp and thats using MORE then 15% loss. if it makes 414, it wouldnt make 500 crank. using that 15% loss thing you mentioned that means it would make 476 crank HP use a ******* calulator, NOT the advertised 500. yes i know theres variables and i would like to know them. but it just doesnt make sense if you just USE MATH. it doesnt matter what that motor DID make before, its all a matter of percentage.

and if you read, i was ASKING about those claims. you see them all over youtube and other forums, i clearly didnt say it like it was fact, or even that i believed it myself..... sorry for the misunderstanding, but im pretty sure i made that clear. i was asking because i was thinking they DONT make that much.

theDreamer

So much wrong in this post all I can do is this:

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theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN
theDreamer's Silvia // URAS // GREDDY
Houston Zs // Facebook // Twitter // Instagram

theDreamer

Oh and to help you:

__________________
theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN
theDreamer's Silvia // URAS // GREDDY
Houston Zs // Facebook // Twitter // Instagram

chii370

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.

theDreamer

__________________
theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN
theDreamer's Silvia // URAS // GREDDY
Houston Zs // Facebook // Twitter // Instagram

chii370

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?

Super Moderator II

FL 4Motion

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).

Skeeterbop

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?

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Srenity: "Yeah no rest needed to spread the love when your 20 that's for sure...."

Skeeterbop

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!

__________________
Srenity: "Yeah no rest needed to spread the love when your 20 that's for sure...."

Gearhead51

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.

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His: '94 RX7 Gotham Racing Street Port 3mm seals, Power FC, GR67 single (T04R), twin Tials dumping behind front tire, Tein coilovers w/ EDFC shocks, etc...
Hers: '09 370Z Touring, 7AT, all stock (for now)... '04 Silverado Z71 for sale.

Skeeterbop

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.

__________________
Srenity: "Yeah no rest needed to spread the love when your 20 that's for sure...."

Skeeterbop

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.

__________________
Srenity: "Yeah no rest needed to spread the love when your 20 that's for sure...."

chii370

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.

Jeffblue

i 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.


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