Safe amount of HP for stock engine?

$hytz_!ntyn$e

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

shabarivas

One million horsepowers!

RCZ

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.

vipor

that's over 9000.....

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m4a1mustang

what, 9000!?

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vipor

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

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One_Quick_Z

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

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Mike@GTM

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.

Sharif@Forged

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.

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BlackCherryZ

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?

TARDCORE

Has anyone blown the new VQ engine yet?

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LiquidZ

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:


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.

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JoeyD

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.

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j.arnaldo

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.