Nissan 370Z Forum - How many went FI and blew a motor?

Nissan 370Z Forum (http://www.the370z.com/)

- Forced Induction (http://www.the370z.com/forced-induction/)

- - How many went FI and blew a motor? (http://www.the370z.com/forced-induction/79725-how-many-went-fi-blew-motor.html)

Quote:

Originally Posted by chii370 (Post 2528153)

my builds going to be 500 whp w/forged pistons, rods, and heavier springs and retainers to prevent floating, NOT GOING TO SLEAVE. Other than that from every credible source i could ask 500whp is the limit with proper install. Repeat PROPER INSTALL.

500whp is fine on the stock motor. Why would you build the motor for that?

Sharps built motor failed?! O_o

Quote:

Originally Posted by blackonorange (Post 2535603)

Sharps built motor failed?! O_o

He caught it before he went BOOM

Quote:

Originally Posted by FireDan50 (Post 2515394)

We did a few pulls to get up to 611hp. Started at 530hp @ 7.5psi. Then went to 580hp @ 9.5 psi. Last one was the 611hp @ 10.5 psi. We were so close to 600s we turned up the boost just a little to see the results. Only reason I decided to chance it was because I have total faith in Todd Marcellini's tuning skills at Motion Lab Tuning. We decided it was best that we stop there lol.

What setup do you have, if you don't mind me asking? You are making awesome numbers on such reasonable boost levels! :tup:

I'm trying VERY hard to make sure my GTM setup will be the same - lots of power on less boost. Coupled with a good tune, I have complete faith in the VQ motor.

FireDan ur numbers were with race gas correct?

There is efficiency to be had with a larger single turbo compared to twins as well, but yes, like Elpuerno said, he was using race gas.

I remembered he was. Would benefit everyone for him to disclose that. Can be misleading and have guys thinking they can make the same powers on pump gas.

You guys should not be hung up on psi vs. whp.

There are a few variable here. One that is mostly overlooked is the type of dyno used. DJ is somewhat the industry standard, but there are other dyno brands that will read a lot lower than a DJ, and a few that will read a lot higher than a DJ. So the power between the lowest reading dyno out there and the highest could be as much as 20%. In the end, each dyno is a tool used to tune a car, and the best way to find out the power a car is putting down is take it down to the drag strip, and make a few runs.

There are other things to keep in mind as well. Fuel (especially race gas vs. 91 pump gas), weather conditions/temperature can play a big role, as well as the tuner himself and the way the dyno is set-up. Some tuners for example do not feel comfortable exceeding 420ft/wtq on these engine, and other are more than happy pushing things much further than that.

it's not about the type of dyno its about how it is calibrated, you can make a dyno dynamics read higher than a dynapack if you wanted to.

Add me to the list.

At 10k miles my motor went down with TT and oil cooler, dual intercooler setup. Boost was set to 10psi and WHP was just over 500.

My check engine light came on and the engine began to run very rough. I had it towed and the code the engine threw was a valve error.

Long story short, I now have a built engine after a long wait and Many dollars invested I hadn't planned on.

What can I say?
You play with fire, you can get burnt!

Quote:

Originally Posted by SharpByCoop (Post 2528138)

I've always despised the phrase: "He BLEW his motor!" 99.9% of the time HE didn't do this on purpose, the motor blew.

In my case this is only partially true. I drove it 20 miles before it completely locked up. LOL! Crank bearings = NFG.

I ran five HARD passes at the dragstrip attempting to get ONE clean run. Each time the friggin' fuel cut or some limiter come on and then went off. Almost always in second gear. This has happened in the past, and Jimmy (my builder) told me to hold it up there a little higher. Last Dec I did, and it went 11.13et. Twice.

This time: not so fortunate. Working boost guage with memory never exceeded 15.8 lbs, despite twisting it a turn. Jimmy's convinced that did it. I'm not. It barely went 120mph in any configuration.

I was trying to better the 11.13 time. So STUPID close to the tens, I HAD to try. Wouldn't you?

I had installed 4.08:1 gears and considered this to help. Truth is, on the street this is a GREAT mod. At the track, it didn't let the engine boost OR work. I'm dead certain that was the wrong direction. For me. But I had to try it to find out.

Play with fire.:icon14: Yes, same components I ran before.

No excuses. The dragstrip is HARD on parts. Five runs in a row flogging it didn't help. (All but one were in the mid elevens.)

The car was smooooth as silk and ran stupendous with over 550whp, until 'I BLEW IT' by going to the strip. LOL!

That is all. I'm searching for an OEM engine and will be parting out the performance parts. Soon.

Jim

Again Coop sorry to here about you built motor failing as I have stated on the G37 forum. The thing that really sucks but stands out is a bearing failure that makes me think oil starvation (burning some oil) or improper clearances during assembly of the engine.

I really hope everything works out for you this just really blows.

Quote:

Originally Posted by Wattles (Post 2537919)

I'm really sorry to hear this. I hope that you can get your car back on the road again soon. Did anyone figure out what caused the valve error and the subsequent engine failure?

Also, wasn't your car the test vehicle for the 16G MHI Kit (in the link below)?

http://www.the370z.com/forced-induct...ctane-7at.html

This thread makes me cringe... Sorry to all the guys out there that had their motors let go.

Quote:

Originally Posted by showme99 (Post 2538245)

Yes my car was the original. Then it had the problem so we rebuilt it when we found out it needed to be cracked open to fix the problem.
It seems it was the valve that bent somehow. Sam said possibly over-rev or something.
So ultimately I went stage1 long block with forged internals.
In the end I ended up with the Garrett turbos and a stage 4 tranny so I wouldn't face any more issues.

It's so much easier buying a car that is already Turboed and to be honest with all of the time and money you have to put into a non-forced induction car you would be looking at almost the same money... The gtr will be my next car.