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:

Had 679whp for 20 miles. Bent four connecting rods causing piston skirts to contact crankshaft counter weights. I would say anything over 600whp isn't going to last.

really old thread... these days 600+ is rather common. I ended up taking mine to 671. We have another car here that made 701. Lots of my customers are in the 600s.

I would never promise anyone that 600+ will be reliable. But it turns out, it tends to be. But you really need to watch your torque... and try and ramp in the boost so you can make your HP numbers without having to bring the torque up too high.

What is your opinion on max torque for a stock block?

Not holding you to anything just looking for personal opinion :tup:

SOHO got over 700whp out theirs and phunk stated the torque killed it. They were just over 600 ft lbs! I think 560 ft lbs is about the limit for reliability. I am coming up on two years at 600 whp and near 500 ft lbs with no issues so far. I started tracking the car last year so we will see how long she will last being pouned!

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Still on a stock block?