Forced Induction motors that have died
 

After reading all of the recent stories of motors that didn't survive going F.I. I'm curious about how often this has happened. If you have had a motor die on you I would like to know the details of what happened.


What was the WHP?
What wtrq?
How long did it run before it died?
Was it ever 100% running right before it died?
What kit?
What PSI?
What was the cause if you know?
What year was the car?

might be good to add year and month car was manufatured as well.

I would add wtrq along with whp. It's usually torque that makes an engine let go if power caused the failure.

"who did the install" and "who was the tuner" might be helpful as well.

And which gasoline was driven when she died?

Miles on car is important too.

this should be interesting lol

sub'd

and what oil was used....because we all know nobody knows what's the best oil to use even for a stock Z.

I do but im not sayin what it is.....:stirthepot:

installed and tuned by nissan
miles = 7500
fuel = pump93
oil = redline 5w-30
whp =276
wtrq=?
1 year
yes
none
0
thrust bearing crapped out
2009

Repped and subbed. Excellent idea for a thread. OP please upkeep this thread, should be stickied as well.

Lets all keep bashing out of here. Straight facts are what are most useful

May I suggest including links to the original build thread and ending results.

Great idea to consolidate all information in one place like the exhaust thread.

Sub'd

soooo i thought the title said F.I. blown motor thread? :ugh2:

I didn't intend for people to think I was talking about Fast Intentions, Trips is going to change the title to say Forced induction. I'm sorry to anyone at Fast Intentions for not thinking of that!

I will add the other questions to the list after work.

It is but shhhhhh...let a sleeping dog lie :ugh2:

Just posting it up to skew the statistics, I bet for every blown motor from boost there is another one that nissan just F'd up. Just saying its a good idea for a thread, nice to get it out there just that we need to take it with a grain of salt. I'm the only reply too so problems lol?

2 pages already and not a single reply from a person that blew there motor.

Well here's mine from when I had a Stillen Supercharger kit on my car

3900 Miles on the car 2010
465 WHP
360tq

11 PSI car ran fine tell one day I was racing and it started smoking it continued to get worse over the course of 2 weeks. Once I got the motor out and took it to my machinist after it was torn down it was confirmed cylinder number 2 piston ring let go.

I read the tittle and knew what you meant right off the bat. No offense taken!

Thanks, Tony

*****Still recovering from ZDayZ 2014*****

I remember reading somewhere else that #2 ring let go as well....

sounds like a ring gap issue

Glad to hear it Tony, Trips sent me a message asking I had a problem with him changing the title and it took me a min before I realized why he was asking.

we should just change the abbreviation for fast intenitions from FI to just Fast or something.

I doubt it I am not the only Stillen kit that let go I know of 4 motors that had the same issue when pushing the kit hard.

Also previous history of the car. A car that was problematic prior to installing FI is less likely to survive.

No blowing a second ring sounds like the boost was getting trapped in the rings which leads to fluttering and cracking ring lands, that or that wasn't an issue and the shiz just let go, who knows?

was this on the stillen tune or custom tune? I'm probably heading down the stillen path and would like to avoid this if at all possible haha, I'll be getting mine custom tuned from the get-go

In my honest opinion I think my motor let go from being pushed to hard on a kit that wasn't designed to be pushed. I think the car ran hot , one major design flaw in the kit is MAF location. The stock MAF's have to be relocated with this kit to the front bumper and uprev uses IAT's for ignition timing. Also the heat exchanger is very small I really don't think it cools enough. Like I said before I know a few that blew one of them is on this forum name is Nissan370. He was pushing his Stillen kit hard as well and it now he has a built motor like my self.


Custom tune I was the first to switch to cog pulleys and upgrade the impeller in the supercharger.

This

since we are having blown motors this is a good readEngine Detonation

is that your website?

No zero affiliation just a good read

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right on. its been like 9-10 years since i have dealt with that guy but he used to get on my nerves lol

I mean its not the best some of it seems specific to one application like the knock hertz and the figures for peak pressure, and some info is left out like knock windowing but it is a good intro to the concept

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The article on compressor maps im not fond of there were a lot of generalizations like using the simplified ideal gas law instead of the full equation sooo...

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anyone currently have a blown motor?

:wtf2:

Excessive EGT's or lack of oil, or cylinder wash from running too rich, or detonation...Boost does not get caught in the rings...There is a thing called blowbye...

I simplified it ****, more boost =more blow by meaning on a fi motor you want to run a wider second compresion ring gap, especially since the factory pistons have no accumulator groove between the rings. The motor comes stock with the second ring running a tighter gap than the first ring which leads to flutter on a boosted engine since there is more blow by

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Just picked up the Z with Stillen upgraded impeller and 9PSI pulley. Added a temperature sensor just before the Stillen manifold. I'm seeing about a 20-25 degree difference from the IAT MAF sensor to the manifold. I.e. 100 degrees at the MAF sensor and 125 degrees just before it enters the Stillen manifold.

Should have really tapped into the Stillen manifold right before it enters the engine since there is a cooling core within the manifold that should bring the temps back down, just don't know by how much and if its close to the MAF readings. That is the next step.

Mr.Squeeze, what AFR and Octane were you running?

EDIT: Just looked at AIT = 95 degrees and temperature just before entering manifold cooler was at 145 degrees. Ambient temp was about 75 only. Holy crap, can't wait for summer time. ughhh Again, I wonder what temp it is after the manifold cooler.hmmm My mechanic/tuner/z guru is wondering that too.hahahah

Oh man 3 pages and only one person man'd up lol!