Alright, well, this is the 2nd engine that's gone now. The first one was an f20 with pretty much a drag turbo kit on EMS that met its demise after about 7 months of hard driving at around 320 whp on a dynojet on an extended 6th gear run against a bike. In any case, I haven't torn that down at all so can't really specifically say what went wrong but some people are theorizing that it was the oil unupgraded oil jets.

In any case, I since have swapped in an f22 engine with the same turbo setup and a new tune where I was able to pump out 330 whp on a mustang dyno. The tune seemed pretty awesome and was running strong until the other day, I took a spirited drive to the gym when suddenly I noticed a clanking sound and it sounded like something was bouncing around inside the engine. Smoke was somewhat coming out of the breather but it was the sound almost like a spray can. It was a horrifying sound!

As it stands, this was only turbo'd for about 2 months and was driven hard since the dyno with no problems so I'm wondering why this thing let loose. I haven't torn down this one either but there goes my season of driving this car. I'm going to have to tear it down and see how bad it is but I plan to find a built block or rebuild my f20 because the f22 sounds pretty bad.

My question is what could have caused the f22 to let loose if it was running well for the past 2 months? I'm wondering if it was a boost spike (I had a deltagate Mark II wastegate and a turbosmart boost T which was opened all the way) or if the engine that I got (used) was on its way out. Could it have been the fuel pump failing? Not exactly sure what could have happened but I'm somewhat annoyed that this thing didn't last long at all!

 

First you need to tear everything down to see what you broke and more importantly WHY it broke.

 

what turbo is it? It is kind of scary that you can blow engines at relatively low rwhp. I might have a talk with the tuner if you blew 2 engines while not even making that much boost. i would find out what went wrong. I doubt it would be the fuel pump. If you just had 1 and it cut out the car would just die. I wouldn't blame the jet bolts with either of the engines. I wouldn't think that a boost spike would cause it with only 330rwhp.


id look at the tuner and the turbo kit since they were both a constant in both instances.

 

Based off your description, ANYTHING could have happened.

What were your A/F's?
How much boost was it running and how much was the motor tuned for?

Overboost and/or running lean are the two main causes of blowing a motor with too much ignition being a close third. We need more details if you're looking for better answers through here.

 

way to much information missing here for anyone to make a call.
either way sorry to hear that.

 

The oil jet "theory" is b.s. They aren't needed anyway. Sorry for your loss.

 

Sorry guys, kind of put this up without thinking of the other particulars.

First setup ran like a charm with no issues. Daily drove for 7 months straight and drove it hard everyday. That f20 was stock block, stock compression and was tuned on a dynojet at a constant 10.5:1/11:1 afr at full boost and held consistent. Ignition timing was set at stock and the turbo was a t3/to4e and the boost was set to about 10-11 psi. As I said, when it went, I was racing a bike and was in 6th gear at around 8K rpms so yeah, I'm thinking that's what did that one.

I then swapped in the f22 and went to a different tuner. He said he kept the ignition timing the same (stock) and essentially kept the afr's at the same as well, 10.5/11:1 under full boost and that's what I saw on my plx wideband. I've been driving this thing for the past two months hard as well, just like I stole it or something with no issues until the other day when it blew. As well, I was running at around 11-12 psi but on the dyno there was a bit of a spike to around 13 psi at around 6300rpm but it would go back down and level off to 11. Same turbo kit, different tunner, different engine.

I'm not sure what could have gone wrong with the turbo kit other than maybe the boost controller or the wastegate which might have caused the turbo to over boost. All I do know is that the f22 engine sounds A LOT worse than the f20, like actual metal clanging around.

thanks again guys for all the info and help. I know I won't know anything conclusive but I don't have an engine hoist and I've never taken out a motor so this might take some time! Let me know what else I might need to know before taking out the engine.

Cheers.

 

how are ur wastegate lines? if one of these was damaged u could have easily over boosted and kaboom

 

13 psi with stock compression, and you were running stock ignition timing? are you serious?
I`m surprised they lasted that long.

 

even in 6th gear you shouldn't blow the engine. Those AFRs look rich, almost to rich. Based on what you said I would doubt that it leaned out or that a 1psi boost spike caused the problem. one of the parts on the turbo set up could have caused a boost spike though if it malfunctioned.

Did you monitor the engine temperature?