VQ37VHR Max HP/Torque
 

What seems to be the max HP and torque for the VQ37VHR before internals need to be upgraded? I'm sure there are a few variables but just looking for a guesstimate.

Thanks

Based on you posting this in the FI section...
500WHP/450-500tq

Well... FI just pushed it to 632whp/589tq without built internals. Who knows how reliable that is though.

To be reliable without built internals. 500WHP/450-500tq

I highly doubt the car will be driven on the street at those #s

So you're telling me keeping the car under 500WHP/450WTQ has seen long term reliability? On SC or Turbocharger? Single or Dual? Headwork? Supporting mods?

Look up "phunk"

/thread

Torque is the number you need to pay attention to. I'd be hesitant to run higher than 500 lbft.

:iagree:

I would try to keep WTQ to about 400ft-lbs

My tuner doesn't feel comfortable over 400 lbft for a daily driver. A weekend toy would be higher than that, but for a vehicle that I need to get me to work every day without fail, that's where he wanted to stop.

phunk is one of the longest running FI cars on stock internals and he is not easy on his car. he has however limited TQ to around 400, which is the key to long term reliability on stock rods.

Who is your tuner chuck?

I went with Kosmic. They came very highly recommended from the shop that installed my kit.

:iagree:

They are getting mine once the BP kit is installed

What they said, and 500WHP usually translates to a number under 400 for torque. But even things fail at lower power if your not careful with installation work, its probably the number one cause of engine failures here.

I know. he didnt ask for reliable numbers.

All the number answers are in, just remember proper install and TUNE is the key when boosting.

Beyond the tune and installation the way its driven will play a big roll IMO. Constantly roll into boost at low RPM high load situations and I doubt the motor will last that long

....but that's my FAVORITE thing to do !!! :driving:

I agree it is fun! I find myself doing it as well but IMO this is the hardest thing on the motor. Torque kills. On flat ground is one thing but those guys who are pulling hills in 6th gear and like to get on the power without dropping a gear or two are on borrowed time IMO

I wouldn't be boosting in 6th anyway. It takes fractions of a second for a quick downshift to 4th.

June 2011 I did my install. Shortly after, I dyno'd 524hp/401tq rear wheel Dynojet. I turned up the boost just a tad within a couple weeks and was probably more like 540-550 / 410-425. Since, the car has been a daily driver minus a couple months for winter.

The end of summer 2013 I turned it up to 586/455.

I am not too comfortable with the power my car makes on the stock engine... so I try and stay off the dyno so that nothing reminds me. On the street, I forgot my worries and just drive it. On the dyno, I worry about it and get reluctant to push it. I was really close to doing a few more pulls to break the 600's, but I guess I decided with the traction issues it was hardly worth the risk.

I would also have to vote for 500rwhp or below with a mint install and tune, if you want to play it safe. If you dont mind a little risk, I would say 525-540. If you dont mind that it might blow up any second, 550-600!

Turbocharged 500whp on 100% bone stock engine. Supporting mods being injectors and pump, clutch/flywheel combo, and reflash. I dont imagine that you could get it to break unless the tune isnt quite right, or you hit fuel starvation too many times

Also, my reluctance to push it harder is SOLELY based on a limited number of data samples. I wouldn't be very surprised to learn that this engine can handle 650-675whp all day every day. We just havent had anyone try it yet. I dont think?

Most of us with a turbo kit are practically a turn of the knob away from the stock engine power record. I dont even know who has that "Record"... but to me records dont count for much when nobody else was trying anyway.

Tune, quality of parts and install are major players. Let's be honest, there are just plain STUPID tunes out there that blur the actual expectations of what this motor can do.

That being said, I would not reach for more than 500 ever on 91-93. Who knows when you hit a hot day, get a bad tank of gas and detonate the **** out of your car and it goes downhill.

Parting Shot: please, research ANY part you buy....there's parts that work and are designed to do so, and knock off crap that was made to make a buck. Do not let the latter into your engine bay, you WILL regret it!

Gluck!

I guess I do(record?), and I agree. It more than likely can(handle ~650), in the hands of a reliable tuner and topshelf parts. I just do not have the nutsack or find the need to run that day in and day out. I will have the 630whp tune in my back pocket for an odd 1/4 event.

Granted, I am putting together my parts for a built block and alpha turbo for 2015. SO by the end of the year, I may just attempt the daily 650 tune, with Seb@SZ's blessing, knowing full and well the built block is waiting...for science i guess.

I could of swore that there was a G37 that hit 650rwhp even before I installed my turbos? I could be wrong.

I think there was one in the 6xxWHP area but shortly after reaching that the owner built the block, will have to research it to find the results.
I think between your work on running long term high 500 and the recent up swing of kits from BP & FI we will see some real numbers pushed hopefully again. I know early on lots of TT owners hit 500whp and called it a day as it was safe and judging by the VQ35 just above their limit and still safe.

I can also agree, good kit (with supporting mods), install, and tune and the car can run for a long time. I am about to crack 75k miles while being boosted since 19k miles with a SC running 400whp. Taking care of the car and it will last and be a blast to drive everyday or just on the weekends.

There must be. The more, the merrier. Sadly. Z and G owners are not made of gold, but when we are, we just get GTRs...lol

Waiting on the R36 is burning a hole in my pocket.

I am very anxious to see what the next Z holds. If it comes from the factory with turbos... its going to turn into an extremely competitive market.

Or some traction...

I only plan on running just over 500whp we know that is safe...just don't have the money to drop on a rebuild if I blow it going over 600 whp...if I do not abandon this platform after the new z comes out I will blow this one to pieces for fun but that will be far in the future.

Be careful here and listen to the advice. I didn't.

I was VERY lucky on this round of all OEM components @ 591whp with an auto (Probably more because of this)

http://www.fototime.com/6027030C5B8BCC1/orig.jpg

http://www.fototime.com/EC11ECC30FF9D51/orig.jpg

I didn't have enough fuel to provide 600whp, plain and simple.

Coop

What fuel pump were you running?

Sasha has discovered with the boosted performance kit that running over 500 whp even with the 340 lph pump the stock wiring could not provide stable voltage to the pump, thus your statement makes sense...he now provides a custom made fuel pump harness.

This topic has been popping up more frequently now, and the numbers also have been increasing.

When I got into the Z forums back in 2011, the general consensus for ultimate reliability was to keep it under 500whp and 400wtq.

We know the stock block can hold 600whp+ 500wtq+ for several dyno pulls....but who has been doing this over an extended period of time. There is already a few blown at these higher levels.

I haven't seen too many threads about that. Who's lost a motor from making too much power?

As much as we've seen the 500/400 numbers tossed out there as the limit, there's plenty of guys running substantially more than that without issue. The question is how long will it stay together. The 600+ guys aren't on pump gas, so they've got a bit more leeway but I can't imagine that being good for the motor's longevity.

The only issue is when throwing in the question of a person popping a motor at Xhp level, you need to dig deeper and determine why. It is not always because of to much power, but other issues that could occur. Such as above with fuel or a bad install and the kit was not performing properly.

Which usually never occurs unfortunately, see people pop a motor, build it and then never speak of why it popped.

With out vvet being cracked we boosted guys are missing out on some extra power as we can't do a cam

I think going to a return style fuel system may be safer if your going to do
High 550+

ATM I have 340lph pump with large gauge wire running to the battery

I think a poor tune on my Stillen kit killed my stock motor and I was only making about 400rwhp at the time

The stillen kit is a great example of what is happening.

SO many blown engines, so many bad installs, and it's setup makes it a nightmare to tune.

Yet it is incredibly rare to surpass the 500 mark, Has abysmal torque and does not really flow enough to warrant major fuel upgrades.It is obviously not a power capacity issue, but has truncated earlier thought about this engines capabilities.

Yet, you have these idiotic tuners, dumping timing in at 7000rpm and hitting numbers that are false and downright dangerous. These cars are being sent home with a gloryhole tune that s prone to detonation and the smallest variable.

The focus on the max power number is a toublesome one. If you want power, do it right, overshoot the parts and find people that know.

I consulted for hours on end with Charles and Sebastian@Specialty Z, as the know e85 with this platform and Seb AFAIK has absolutely the BEST tuned to blown enging ratios that I could find. NO offense to anyone else, but his method is tried, true and impressive to say the least.

You don't just mish mash a bunch of parts and find the nearest tuner and say 500hp please! Take your budget, add a few thousand, research every part, every hand touching your car.

Oh and Charles, you are absolutely correct. But we both know that there are specific reasons that information is privy. Once the field is clear of profiteering buffoons stealing other people's hard work. I have a feeling doors will be opening up! Some of the product in the market is downright dangerous and even some that may enter the market is even more dangerous..

Been running a 340pump with a twin turbo greddy kit on abrand new nismo, After breakin in the motor properly, Been running 10 to 12 psi on pump gas and pure meth (550ish whp) and 13 to 15psi on race fuel ms103 and meth (600+whp) still running like a champ but the twin disc clutch let go , Ive got every cooling upgrade available for our heat oil cooler, radiator, fans upgrade for oil cooler and radiator and methanol. 7000 boosted miles so far.:driving: