Safe amount of HP for stock engine?
 

Ok so we have all seen the power claims of various tuners with their turbo kits and what not. I am very interested in the GTM kit which puts out like 536rwhp I think. now i was reading the GReddy blog about their tuner kit and they said it puts out 450rwhp which is the maximum amout to run safely on the stock engine. What i am trying to find out is if this is true. What is the safe amount on a stock engine? Is GReddy correct or is the GTM kit good to go? Thanx ahead guys

One million horsepowers!

I think 475hp is the safe limit on this car. That's what I would feel perfectly comfortable pushing with 93oct pump gas in just about any weather. 500hp in cold weather or with water or methanol injection. 560hp on race gas.

that, or One million horsepowers! like shab said. Also a perfectly reasonable guess.

that's over 9000.....

what, 9000!?

haha that's a guild on the wow server i kinda still play on. alt guild

627.437 WHP is the safe mark :)








JK 450whp I would think is a good safe mark on a stock block that would mean you are over 500 at the motor


DAN

Safe is a relative term as it depends on a lot of variables. Safety depends on tuning, fuel quality, reliability of components, and driving habits.

Here at GTM, we've ensured that all the things under our control work towards safety. However, how you drive your car is up to you. If you drive it like you stole it 90% of the time, the motor isn't going to last very long, forced induction or bone stock. Also, whenever we tune a car, we tune to the lowest common denominator for safety. However, we have at times increased boost and horsepower using a boost controller and race gas (at the customer's request) to be used sparingly for a little extra kick.

Regardless of which forced induction system you opt to install on your naturally aspirated high compression motor, please know that there is always going to be a risk associated with that choice. You can mitigate that risk with supporting modifications and proper tuning, but never eliminate it altogether. Ultimately, our turbo kits are rated according to the capability of the turbochargers and the system itself...not necessarily what the motor can handle for extended periods of time. We generally recommend mid 400's to low 500's for the stock engine and up to the low 600's for short bursts (with race gas of course).

I hope that helps answer your question.

I would echo Mike's thoughts. Power levels will also vary on different dynos. So one man's 450whp might be another man's 500whp. I would say that 450-500whp is a very safe range of operation.

I think I just Bursted. :excited:

from tuners' perspective, what is the average longevity of TT engine, assuming that it has been properly tuned to 450-500 whp range and driven as a daily driver?

what would be the first indication of "something going wrong" with TT engine?

have you seen any TT 350z (with 400-500 whp range properly tuned) with over 100k miles?

Has anyone blown the new VQ engine yet?

GTM posted a picture comparing the stock connecting rods between the HR, VHR, and DE motors a long time ago. I saved the picture because I knew it would be useful at some point.

From left to right; HR, VHR, DE:
http://img96.imageshack.us/img96/485...nvhrthende.jpg

I have posed similar questions to boosting powerhouses like GTM, AAM, and Injected Performance. After talking to them, I have concluded that about 430-450 hp on the street is perfectly fine on the stock block. The beauty of the TT though is adjustability on the fly with a boost controller. If I were to take it to a road track every now and then, I'd definitely kick that boost down a few just so I'm not pushing it. I hope this helps.

Judging from articles I've read a good indicator on the DE motor was the #6 Cylinder Head Temp (#6 specifically on the DE but CHT will give an indicator of whatever cylinder starts to go). Granted it takes some additional sensors to monitor, but it is an indicator. Regular compression tests aren't a bad idea either.

Try to contact a mechanical engineer and, if at all possible, one with lotsa savvy on Nissan engines. Guesswork could turn out very costly on an issue like this one, man.

Search button people, this question has been asked before. GTM has stated the max would be 550whp, however thus far TT owners have limited it 500whp safely.

So how much HP is a 20g charger capable of putting out? Does anyone know if plans for a new plenum or plenum spacer are in development?

plenum spacers are not necessary anymore. on the VQ35DE there was a design flaw there the plenum sloped down too much, limiting the amount of air getting to the forward two cylinders. that was fixed with the HR motor.

haven't seen a new intake manifold or any word about one yet.

the only SC thus far is GTM and I don't think it'll cost you 20g's, they haven't released their #'s yet

I think the reason why we havne't seen a new intake manifold is that the OEM one is up to the task. This past summer at vinny ten's bbq he told me that the manifold is solid and probably won't need replacement for atleast up to 600hp

I think he is referring to the TD06-20G turbo from Greddy :tup:

if i were do to a turbo setup though, i'd probably be budgeting somewhere up to 20g. parts, labor, accessories, etc. maybe 15-ish, but why cut corners

By using the compressor maps, thay have been calculated to be about 920 hp capable. In a real world application though, I would say 600 hp is very possible with more room to grow after that. How much room, I dont know.

Yup. I was quoted about 18.5 for the works. Cheapest was around 10.5.

i'm interested in the GTM 4.2 stroker kit :yum: :drool:

FI can come later with a simple piston swap.. "simple" hahah

I'm going the other direction lol TT kit then stroker kit ;) I am going 4.5L hehehe

Imagine with the 37VHR :drool:

Speaking of TT's My kit will be here 2morrow! WOOT WOOOT!!!! :excited:

whore :shakes head:

I am sooo gonna rub it yo FACE! :happydance:

ewww don't rub that in my face!

Shut it you know you like it! hehehe all up in yo face like a porn star!

:barf:

Wow the old 20G is really capable of that power output on the 370. I had a 20G from Hahn Race Craft on my SRT4 (:rolleyes:) and the most I was able to get was 448whp/494 lbs tq. Then again that was on a 2.4L with a single turbo.

Although I would like some more power from my Z I think I will stay with bolt-ons. Having a turbo car can be a pita at times making sure everything is running great.

yeah... i have heard rumors that the greddy kit is a tuner kit and capable of 900+. they say that it will be easily 450 to the wheels which seems managable, of course other bolt ons would raise that. being that it is a tuner kit there are alot of options left open when it comes to fuel delivery and electronics which is kinda shity given that it is already a grip of cash, but hey you know veilside's motto "Fortune Favors the Bold" and i got a little punk around here with a cobalt tt saying he can take my ride...umm in mexico of course, cause its cool in mexico. agh agh

They are making a stroker kit? Any power numbers yet?

they already have several kits out:

a 3.8L
a 4.2L
a 4.5L

:tup: A 350z already did a 4.2L and it made massive numbers! It was a black one cant remember the owner's name.

NA or TT?

the 350z was TT

From GTM's website:

Our stroker upgrade represented the pinnacle of engineering for the VQ35DE platform. From our own internal testing, the components performed flawlessly. The very first GTM 2006 Nissan 350z that received this build achieved 855whp (DJ) at 22psi. After the first 3000 miles, that engine was removed and completely disassembled for an extremely thorough inspection. There were no issues found whatsoever, and the engine was reassembled.