Ok so I haven't had a Z for a while and I haven't posted here in an even longer amount of time.
Last time I had checked BigBri made 500+ on a pump gas car that was stock motor with meth/water injection.
I was wondering what progress has since been made (if any) on making power on the stock motor.
Anyone making reliable horsepower above 475whp lately?

Thanks

 

No

 

LOL.
So that's it?
People are using F-Con all day now, UTEC as well.... and we got nothing?
Motors still popping if you look at em funny?

 

george@GTM was running 550whp for about a day at the track then the engine blew after lapping all day and trying to hit 140mph on a straight

he used race gas, but no water/meth, and no oil cooler

 

Damn...This is kinda dis-heartening. I was hoping there had been more progress/ I'm in a position to buy another Z. But I think I might just do the RB25/S14 project I'd wanted to do for a while if a Z can't handle 500whp on pump yet (if ever) . Especially considering the fact that an S14 is gonna cost less and weigh less
I'd turbo a Z and eventually wanna build the motor but I don't wanna have to be on pins and needles with a Greddy kit at like 9psi you know?

 

My car was boosted at over 420 rwhp for 2 years, Then for a while at 470-510 rwhp then at the track at 550rwhp all day and 90 miles on the road course beating the **** out of it.

Can you make 475rwhp on the stock block? With the right components yes. Will it last? No way to know since all these engines are different. Some and take the power like mine and others blow on the dyno at 380 rwhp. (Most of them don't though )

If you can afford to take the chance, then go for it

-George
GT Motorsports

 

I can afford to rebuild the motor... but I'd like to have the car making 450-500whp (not all the time ... just once in a while... keep the boost low when just putzing around, but have the boost controller high setting on a 450-500 boost level) for a year so I can enjoy it and buy a beater before the car spits its guts everywhere.

 

You can do it, As long as your in the postion to comfortably rebuild the engine if it does let go and can afford the down time as well as the cost. Charles @ CJM also made some high 400's on his stock block and feels the same way as I do.

If you drive the care properly and respect it, it will last. Beat the *hit out of it @ 550rwhp as I did, and well you know what will happen

Also my car has NEVER had a water injection kit, to this day but I will be adding one to my build. I ran 100 octane at the track just for additional safety margin the tune was a 93 octane tune.

Do a search for post by me and you can check out the thread

Good luck,

-George
GT Motorsports

 

Thanks George. I appreciate it.
I actually can do the tuning myself but if I'm gonna be on the ragged edge I'd rather have someone's expertise to help ... Who do you suggest I take the car to on the east coast?

 

475 on race gas all day long, 475 on pump is pushing the edge on a dynojet.


it can be done though...

 

I only know 5 guys with 350Zs, four of whom put down 450whp or greater on various dynos on stock motors and not one with a motor failure (the only other owner I know is stock). All four of these guys drive the cars hard, drag racing, street stuff, etc. I know 3 of those motors have never had a drop of race gas in them, I don't know the other guy well enough to know if he ever bothered with race gas, but I know he didn't run it every day. The two of the three guys I know better had their cars boosted and running in this state for like 2.5 years, one is still in that state, the other recently tore down the 2.5 year 20,000 mile boosted motor to build it for the 650ish ballpark and upon inspection the motor was found to be immaculate.

There's also this thread of course:

https://my350z.com/forum/forced-induction/268465-function-tuned-o-563-7-dynodynamics-real-rwhp-stock-motor.html

 

345 say HKS...

 

One word! VQ35HR

 

Depending on the dyno, about 400-450whp is a safe limit for the stock block on pump gas. Detonation is not an issue with the higher whp engines that broke. Our factory rod/rod bolts are relatively weak, and with enough pressure, and especially high RPM operation, they will stretch or even bend slightly. All it takes is a couple thou of stretch, and that rod bearing will be starved of oil. The end result is a rod poking out of your block.

 

when will you stop...