This question may have come in other round about ways, but I was wondering how much HP my internals/ tranny/ rear end can handle. I am running a T-netics st and that is it. I am considering buying the new plenum from Kinetix down the road but am not sure if I am just making a time bomb. I havent dynoed but I am assuming that I am at 365 whp and if you add the 55 whp that is being claimed by this plenum that would put me in the ball park of 415 whp give or take. So..... can it be done safely?

 

I doubt you will see a 55 RWHP gain from the manifold but I know the Turbonetics Z put down well over 400 RWHP without a hiccup. Stock engine.

 

There's no way the Kinetix will add 55 WHP. I think 25-30 is more realistic.

Either way, there are many of us up around 370-380. I have the Kinetix sitting in the box but haven't got a chance to install it yet. I hope to get to 400 WHP. I may also go with Crawford Headers and Hi Flow Cats later this year too.

Most have felt that 400-420 whp is about as high as we should go (tuned well) without building up the motor.

 

Also keep in mind that Charles was making ~467 RWHP daily with no issues on a stock motor. And he BEAT on it.

 

Doesn't that seem even high I thought some of the benefit's of a plenum was lost on a forced induction motor but still I would the 15hp at the wheels would be more realistic...if it's really that much then I got to get one,lol.

 

look at the thread on the manifold

 

You could be right. Someone just posted results with a TT and they only got about 9 RWHP additional.

Don't know if the blowers will benefit more than the turbos.

 

is it still running? i ran 15psi on an ati and came out with 5 bent rods, the 6th one i didn't even check on a square cause i was sure it was bent too! my motor was still running fine, no knocks or anything, but i tested it, and have seen what the stock internals will hold (with out detonation) and that is what i wound up with. the rods in this motor are junk! mine looked like silly putty, and was very lucky i caught it when i did.

 

He took it out to rebuild but was fine when he did.

A friend down here ran 10 psi with 455 RWHP until he blew a head gasket but the internals were fine, I think the internals can probably hold up if tuned properly close to 500 but longevity is the issue as my friend saw the gasket just couldn't hold up to the boost so the safest long running is a properly tuned setup with 8-9 psi and around 400-420 RWHP, he is not to upset as he was building a motor anyway and now shooting for 750 RWHP.

 

i took the engine out to replace with my built engine before it ever broke. I had over 13,000 miles with the turbos on the stock engine... about 6-7000 of them were with the FCON at that power level, and only about 3000 of them were less then 430rwhp. The car was put thru as much abuse as you could possibly put on a road car without putting it on a circuit... street, highway, and drag raced pretty much every day and I didnt drive the car without giving it extreme hell flooring it almost every time i accelerate...

turbos are a lot less work on the engine to make the same power versus a supercharger, so the max RWHP potential of the stock engine will be significantly greater with turbos, I would think around 50-70rwhp. I was only running 9 psi to make 467rwhp.

properly tuned is the key, and without a standalone like the FCON or the now available PnP Motec... even with a good tuner you cannot be 100% confident in the tune or its consistency... I have seen far too much varience in the piggybacks to feel safe taking one to where i went on the stock engine and actually using it... so far I have not seen or heard of any other 350z making as much or more power then I did on a stock engine and actually doing something with it and running and racing it every day, versus being a dyno queen... so its not exactly regular or something i would consider safe until more people have done it... i just personally dont mind very much if the engine blows up.

It doesnt take much strength in the internals to handle HP... what is gonna kill them is heat and improper tuning... one reason my engine may have lasted so long is because i ran agressive ignition timing with 100 octane in it daily, and this would help keep some of the heat out of the pistons and reduce my risk of knock to mess up the ring lands or the rods.... perhaps conservative tuning on 93 octane would have been all my engine needed to fail like the rest.

 

Headgasket failure can be caused by detonation as well. Detonation in its most basic form, is a huge immediate pressure spike in the combustion chamber. The pressure can go anywhere, and cause things to fail, such as ring lands, or headgaskets as well.

 

Kinda off topic but did the PnP Motec just come out? More details please....

 

I agree with Sharif... the headgasket on a VQ35 is not going to just blow from too much power.. something caused it. If its a factory assembled engine then its 99% most likely from detonation, IMHO.

 

I dont personally have details but there is a seperate thread for it.

 

You guys are probably right, he was running MAPS good for 10 psi but was not addressing timing, I was actually surprised it lasted a couple of months that way.

 

ah ha, there's your secret! 100 octane daily driven

I know, it makes sense. I was going to try running half 101 and half 91 on my APS setup when I get it and tune for 440whp or so

 

So now that this engine has been messed with so much now, how much WHP can a vq35de handle?

also would it be cheaper/better to do a swap to make 850+ RWHP but daily driven and occasionally drifted?

 

a little under 15years?

congrats on a solid 2nd place

https://my350z.com/forum/the-lounge-...l-of-fame.html

and 850+hp will cost you $40k and last roughly 1500miles when the sleeves sheet-out bc they were installed wrong...