I wouldn't exactly call running 7psi on a VQ35 running it on the "ragged edge". Plus, the VQ is not exactly a "high compression" motor. Most sportbikes have compression ratios in the 12:1-13:1 range and there are many running forced induction with plenty of relibility...THOSE are high compression motors.

I just get tired of hearing about how adding boost to a motor will make it wear more and how it will break and ect. ect.

The fact is 95% of people who add FI to a 350Z will never even NEED to touch the inside of the motor...because in stock form it will have no problem running RELIABLY with well over 400whp IF tuned properly. Hell it would probably run 200K miles without a hiccup. No one has even come close to extracting the full potential out of a VQ35 motor yet so many people are already talking about stronger internals and lower compression and blah blah blah. It just gets old.

 

link or source please?

 

how about 5 years of experience with VQ motors adding both forced induction and nitrous.

Search VQ35DETT and you'll find it....I don't have time to dig up links right now...

 

Except the simple reality of it is people are blowing up their motors on 7 psi of boost. And since you seem to want to be the leading authority on the VQ, please answer my question on the compression ratio of the VQ35DETT.

 

Well, what's companies like Top Secret running on their setup. Aren't they in the mid to upper 4xx rwhp range? I have the article of their setup at home, but not sure if they stated what their compression ratio was on their cars.

 

And word is/was that they were also breaking stuff.

 

I bet you they didn't blow a hole in their piston ala ravaz.

Bent rods, bearings and such, which is a totally different animal than what we're seeing happening.

 

The simply reality is that motors that are going on 7psi aren't going because the internal engine components can't handle the stress. They are failing because of DETONATION which can bust a motor with ZERO pounds of boost.

The actual specs on the VQ35DETT are not released to the public as of yet and I'm not going to assume anything.

The compression will be lower than an N/A VQ obviously.

 

so explain why a VQ30DE with well over 400whp doesn't pop....yet a VQ35DE with near the same will blow even though the 35 has a thicker head gasket and just as strong if not stronger internals than a VQ30DE.

 

I don't claim to know everything about a VQ. You seem to. So why don't you tell ME. Go ahead, tell me. And why in the world would the VQ35DETT have lower compression (whatever it is) than any other VQ if it doesn't matter? What causes detonation? Too much compression and not enough freakin OCTANE not necessarily to little fuel. I don't care how much gas you pour in, if it detonates, which these motors are doing it is because pump gas won't support 10.3:1 compression and boost.

 

My engine isn't detonating on 10.3:1 compression and boost. Hundreds of these kits have been sold and 2 failures, which can be attributed to installer and tuning issues.

 

why don't you tell all the guys who have perfectly functioning ATI prochargers with stock compression that their motors can't handle the boost on pump gas.

low compression motors will detonate with a certain amout of boost just like higher compression motors...it's just a higher number. But they also make less power at any given boost level than a higher compression motor.

I don't claim to be a know all about the VQ motor series....just more than most people on here who seem to think that upgrading engine internals is the end all to having an engine that can handle boost.

 

Like I said before, there is a way to do it and a way to do it right. I am not saying, NO EXCPETIONS or anything. I am saying that if you want peace of mind, factory reliability, better power than 350 HP woo , then build the motor. There is nothing wrong with my approach. You like the cheap way, which is fine. Its cheap. But lets both build one and 3 rebuilds down the road, maybe in 5 years, yes, you will wonder why you didn't build it right the first time. Foundation is essential. You can build a house on sand. Doesn't mean that it will be there in a few years. I have done too many things half assed in the beginning that I have learned my lesson that just because it can be done doesn't mean it is the best way or smartest way to do it. That's all.

 

I know of plenty of VQ motors that have been under boost for MORE than 5 years. With no problems at all. Go over to maxima.org and tell the guys that have run boost since Stillen introduced the Supercharger kit for the maxima that they are going to blow up their motors and they will laugh you out of the building. In fact I know MANY more people who have had problems AFTER upgrading their engines than people who leave them alone and just tune them well. Only 350hp reliably....on a VQ35DE...there are VQ30DEs out there with WELL over 400whp and very few have any problems. Why don't you go and build up your VQ engine so you can
feel better about adding boost and then come back in 5 years after you've had to replace every seal on the motor because it leaked so much oil...and spend half of the time figuring out why you couldn't get compression on one or more of your cylinders due to sticky aftermarket valves...etc. etc. It goes both ways. Building your motor up DOES NOT GUARANTEE you factory reliability or anything close to it. In fact reliability wise if your're not running crazy boost levels you're probably better off keeping the motor stock.

Frankly, when I add boost next spring I have no plans of doing anything to the motor internally and I will be perfectly happy with right around 400whp in my Z with near factory reliability. I do however plan on installing better injectors and a J&S safeguard knock sensing and timing retard system.

If I was planning on going after the 600whp mark...then yes I would probably built up the motor, but I also would have to stop driving the car daily.

 

Ok ok jeebus. I really don't give two craps. My opinion is mine and I'm sticking to it. You can have yours. Obviously you are more passionate about the VQ and FI but that doesn't make you right. Have fun. Bye. Just know that 400 horsepower is meager and maybe you can run that with stock internals. But you can put that out NA. I am talking about making real power and staying reliable. Why use FI for such a small gain? You are just talking about keeping up with the Jones'. I am talking about being the Jones'. So have fun with your mediocre HP and "reliability." I am tired of this now so have a ball, dude.