Anyone blown a stock boosted motor yet?

[DRACHENV6]

Originally Posted by Sellout

Look through that list above and try to find an example of overboost caused by failure of the wastegate.

That doesn't really matter. Preventing knock is all in the tune. Even a bad N/A tune can rattle the motor with knock and spin the bearings(or worse).
I've seen built race engines with fully forged bottom ends come apart due to knock with less than 200 ft lbs at the flywheel.

Whats the purpose of a WG?

[cdrazic93]

Originally Posted by DRACHENV6

Whats the purpose of a WG?

http://forums.nasioc.com/forums/show....php?t=1029957

[cdrazic93]

Originally Posted by Neal@EQtuning

In the last 6 years our shop has built over 600 EJ's, and 99% were built because of failure. The other 1% were preventative. Ejs have what we like to call "glass pistons". From what we've seen already, the FA20 is a much stronger engine.

Although the semi closed design was in good practice, the hypereutetic pistons werent cast properly, and yes came the term glass pistons. Also known for ringland snapping and such. The only advantage the EJ has over the FA is the amount of crankcase oiling it can do. Unfortunately the FA wasnt built for that extra 10-20 PSIa.

[Sellout]

Originally Posted by DRACHENV6

Whats the purpose of a WG?

What's the purpose of a forum member who's "never boosted" saying something like "correct me if I'm wrong..." and then trying to argue an incorrect assumption with someone who actually knows a bit about the subject in question?

Operator error does not constitute wastegate failure. They really are pretty reliable.

[D K]

Originally Posted by Sellout

It's actually not uncommon.

Knock creates intense combustion chamber pressures, which dramatically increase the pressure on the rod bearings, the oil gets squeezed out and you have metal to metal contact, bearing spins.

I suppose it's possible, but more likely than not, a spun bearing is due to lack of oiling or possibly even the wrong type of oil.

What oil was he running when he spun the bearing?
Hopefully not the junk they put in the cars at the factory????



D

[Sellout]

Originally Posted by D K

I suppose it's possible, but more likely than not, a spun bearing is due to lack of oiling or possibly even the wrong type of oil.

What oil was he running when he spun the bearing?
Hopefully not the junk they put in the cars at the factory????



D

It's more than possible. It is literally one of the most common causes. Look it up if you have to, I'm not making this up...

[s2d4]

Originally Posted by Sellout

What's the purpose of a forum member who's "never boosted" saying something like "correct me if I'm wrong..." and then trying to argue an incorrect assumption with someone who actually knows a bit about the subject in question?

Operator error does not constitute wastegate failure. They really are pretty reliable.

Win at internet bro.

[loogs]

Originally Posted by Neal@EQtuning

In the last 6 years our shop has built over 600 EJ's, and 99% were built because of failure. The other 1% were preventative. Ejs have what we like to call "glass pistons". From what we've seen already, the FA20 is a much stronger engine.

so basically if you get an STi, keep it to bolt ons and such? also, whats the deal with this great FA20 motor? so the compression ratio is too high and thats why they blow? then i dont understand whats the deal with the new WRX. isnt that a FA20 with a turbo? why is that safe? and if thats the case then wouldnt the best engine swap for an 86 be that exact motor, the FA20 DIT??

[Reaper]

Days of explaining needed to bring you up to speed. Search fool.

[Reaper]

The fa20 is the strongest smartest engine Subaru has ever built. The fa20dit in the wrx is lower compression, turbo and uses a less sophisticated injection system.

The ej in the sti is poop and blows up. Fullblown made more hp on a stock fa20 then some built ej's can handle.

There are probably 15 threads on fa20dit swaps. Its worthless. It won't fit. It has a crappy turbo and intercooler and doesn't have the port injections system which I think will be the downfall in 5 years like every other di only car on the market thats been a catastrophe. You will see fa20 4d-s swaps into wrx's I guaranty it.

Fa20s are blowing up from user error or abuse. 400whp on e85 is getting more and more common on a stock engine.

[woode]

Originally Posted by Reaper

The fa20 is the strongest smartest engine Subaru has ever built. The fa20dit in the wrx is lower compression, turbo and uses a less sophisticated injection system.

The ej in the sti is poop and blows up. Fullblown made more hp on a stock fa20 then some built ej's can handle.

There are probably 15 threads on fa20dit swaps. Its worthless. It won't fit. It has a crappy turbo and intercooler and doesn't have the port injections system which I think will be the downfall in 5 years like every other di only car on the market thats been a catastrophe. You will see fa20 4d-s swaps into wrx's I guaranty it.

Fa20s are blowing up from user error or abuse. 400whp on e85 is getting more and more common on a stock engine.

This. I laugh at the people who start talking about swapping in an EJ..

[nelsmar]

Originally Posted by dwx

He has another thread and is doing a LS swap now, but I can't find it. It sounded like he had a cam failure of some sort, not a bottom end failure.

No one ever opened the block up. The car still ran but it ran very poorly last I heard. My friend now has the engine and we were going to tear it down and see what let loose soon. Its just too damn hot out right now in Phoenix to be doing a detailed tear down. I haven't seen the logs or talked to mike but from talking to @Cross and a mutual friend it sounds like something else may have caused the failure and not the tune. VVT is possible, or about 1,000 other failure points. hah

[nelsmar]

Originally Posted by woode

This. I laugh at the people who start talking about swapping in an EJ..

I hate when people ask me why I didn't just swap in an EJ... SMH

[King Tut]

Originally Posted by loogs

so basically if you get an STi, keep it to bolt ons and such? also, whats the deal with this great FA20 motor? so the compression ratio is too high and thats why they blow? then i dont understand whats the deal with the new WRX. isnt that a FA20 with a turbo? why is that safe? and if thats the case then wouldnt the best engine swap for an 86 be that exact motor, the FA20 DIT??

I would feel more safe with a properly boosted BRZ/FR-S FA20 at 300 to 400 whp then I would with an EJ25. I am an admin in the local Subaru club, and I have seen how many EJ motors have required rebuilds.