Forced Induction motors that have died

1slow370 · 05-22-2014, 03:42 PM

sounds like a ring gap issue

Mr.Squeeze · 05-22-2014, 04:32 PM

Quote:

Originally Posted by 1slow370

sounds like a ring gap issue

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.

1slow370 · 05-22-2014, 04:43 PM

Quote:

Originally Posted by Mr.Squeeze

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.

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?

Mr.Squeeze · 05-22-2014, 06:42 PM

Quote:

Originally Posted by 1slow370

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?

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.

Quote:

Originally Posted by mikey1600

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

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

jwick · 05-22-2014, 06:45 PM

Quote:

Originally Posted by Mr.Squeeze

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.

This

future370zzz · 05-23-2014, 05:12 PM

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

Dajerseyrat · 05-23-2014, 04:52 PM

Quote:

Originally Posted by 1slow370

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?

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...

mikey1600 · 05-22-2014, 06:22 PM

Quote:

Originally Posted by Mr.Squeeze

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.

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

05-22-2014, 03:42 PM	#1 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	sounds like a ring gap issue __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

05-23-2014, 05:12 PM	#6 (permalink)
future370zzz Track Member Join Date: Dec 2011 Location: Bay Area Posts: 555 Drives: 10 Nissan 370z Rep Power: 15	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 ChaseZ likes this. Last edited by future370zzz; 05-23-2014 at 07:51 PM.

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