1G Why you dont overboost a fp turbo

SasaniFab · Oct 28, 2017

So I got a message today from my buddy who purchased the fp green off of me awhile back. The turbo had less than 1k on it mind you. His car is pretty serious and was just switched over to automatic. This is why you dont go over 30psi on a stock framed turbocharger.

Vegas Smith · Oct 28, 2017

Wow that's insane.

EC17PSE · Oct 28, 2017

But those turbos are doing 30+ now right? Im no turbo expert but im sure something else must have been wrong!

gsxeclipse102 · Oct 28, 2017

Thats not from boosting 30 psi. Looks like the compressor cover wasnt attached correctly and came off damaging the wheel. That large snap ring can be a pita to fully seat if the turbo is still in the car when trying to install it

SasaniFab · Oct 28, 2017

Id like to see the lifespan of the turbo boosted 30+ psi for extended periods of time. Looks like the wheel exploded

SasaniFab · Oct 28, 2017

The shaft and the nut are intact.... looks like what happens when you overspeed a cd.

SasaniFab · Oct 28, 2017

Grenade

SasaniFab · Oct 28, 2017

Like to hear some opinions

lasthope05 · Oct 28, 2017

It looks like a wheel failure to me from a manufacturing defect. The large DSM frame turbos are boost limited, not because of wheel failure, but because of thrust failure due to the heavy rotating assembly on the same 14b thrust hardware. That was the reason they pushed for the BB versions if running higher boost levels.

Vegas Smith · Oct 28, 2017

I highly doubt this would happen so quickly just because of the amount boost being run. Otherwise, FP would be out of business. Now, if this were over 4 years or some extended period then it's possible.

thakingcb7 · Oct 28, 2017

Looks like the 90 degree elbow is blown out. I wonder if it was a serious boost spike that killed it. Also... what's the strand of wire for?

19gsx91 · Oct 28, 2017

..Misinformation as usual. @Kapok6 @donniekak

Both of you were high 40+ for a while on FP turbos right? I'm 99% sure that's whoever took it apart didn't put it back together properly. Never seen an FP turbo fail. I'm running 30psi right now on a v1v68hta with zero issues, have been for months.

KentStateTsi · Oct 28, 2017

38-40psi daily on an evo jb black.

Vegas Smith · Oct 28, 2017

I'm thinking somebody clocked the compressor housing then didn't reinstall it correctly? Either that or they sprayed wayyyy too much nos yo.

donniekak · Oct 28, 2017

Usually a compressor coming apart isn't going to knock the cover off as the energy is directed radially from the shaft centerline, not in a thrust direction.

However a compressor cover coming off can easily wreck the compressor wheel. I have actually seen Mitsubishi style compressor covers blow off before.

I've never had any issues using an fp turbo within their design parameters.

kronus · Oct 28, 2017

I'm calling bs. It looks like the compressor housing wasn't seated all the way, eventually came off at high boost, and the rest is history. Failures due to high boost result in thrust hardware failure, as mentioned earlier.

kmetiuk · Oct 28, 2017

Vegas smith said:
Wow that's insane.

Took the words outta my mouth. Damn.

SasaniFab · Oct 28, 2017

Guys if the turbo was running through an entire racing season untouched and suddenly the wheel explodes , the owner says the shaft still spins freely. I havent seen it myself but if the wheel exploded is it possible to throw the cover off? The nut is still visable?

SasaniFab · Oct 29, 2017

Id like for fp to chime in

GST with PSI · Oct 29, 2017

gsxeclipse102 said:
Thats not from boosting 30 psi. Looks like the compressor cover wasnt attached correctly and came off damaging the wheel. That large snap ring can be a pita to fully seat if the turbo is still in the car when trying to install it

^This.

It's a commonly know issue, which causes exactly the damage pictured. If the snap ring were seated properly, the compressor housing would still be attached to the cartridge. The compressor exploding should not dislodge the compressor cover, no matter how much you're overspeeding the turbo.

amsrn13 said:
Id like for fp to chime in

Well, you'll be waiting a while. FP hasn't provided feedback or technical advice here on the forums for quite some time, nor are they a supporting vendor anymore. If you'd like their feedback, you'll need to get it via other means.

SasaniFab · Oct 29, 2017

GST with PSI said:
^This.

It's a commonly know issue, which causes exactly the damage pictured. If the snap ring were seated properly, the compressor housing would still be attached to the cartridge. The compressor exploding should not dislodge the compressor cover, no matter how much you're overspeeding the turbo.

Well, you'll be waiting a while. FP hasn't provided feedback or technical advice here on the forums for quite some time, nor are they a supporting vendor anymore. If you'd like their feedback, you'll need to get it via other means.

So what your saying is that if he didnt mess with the compressor cover, its possiblethat it wasnt assembled correctly? I never took it off or had
To clock the housing. Ill ask if he did.

EC17PSE · Oct 29, 2017

It may not of been you, it could of been him playing around with it, these normally have dowel pins so if it was a fraction off it can not let it seat correctly, my guess is the comp cover as many turbos that go bang i dont ever see that pull the comp cover off!

SasaniFab · Oct 29, 2017

Doesnt make sense..... the turbo was doing fine then all of a sudden it came unseated? He had been racing with the turbo all season, never took it apart? You dont have to? The turbo comes ready to go

SasaniFab · Oct 29, 2017

Either way, the argument isnt if u can boost them to 30psi or more..... they are simply not engineered for those types of boost pressures. Maybe the snap ring worked its way loose and blew off into the compressor blade.

EC17PSE · Oct 29, 2017

No idea on what they are rated to, snap rings are stong, used in alot of thi gs from suspension and wheels etc so they do well, 30psi sbould not be an issue, we can only guess and assume at the moment but fp will tell him exactly why it came off, take a look at this https://www.smalley.com/ring-design/load-capacity is shows how strong snap rings are,

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