I have a new block and a pair of heads. PM me if you are interested. They are currently with Ultimate Racing in Canada

Az

 

They make great paper weights. You wouldn't believe how many fubared Forged pistons I have around the house out of my drag car.

aalzuhair: PM Sent!

 

Could it have been bad gas from the car sitting over the winter and maybe moisture getting in the tank?

 

the extent of the damage would lead one to believe that the damage had already occured, starting up the motor after the car was in hibernation was simply the "straw that broke the vq's back"
...how could the engine at idle produce that much damage???? in theory, it probably could, but more than likely, the damage was done, the rods were holding onto dear life, when the car was later started, the rods gave way, the pistons rattled around inside the cylinder (even at idle- at 1000 rpms, the piston is moving up and down at least 16 times per second!)

 

paperweights?

we use them as ashtrays.

 

Why are people always so quick to blame the motor itself??? Especially at VERY LOW boost levels...guys are running around with 9+ psi on stock motors everyday without issues....if motor strength was the core issue here we'd be seeing well tuned motors letting go at roughly the same power levels. When guys run around day after day with WELL over 400whp and then someone breaks well UNDER 400whp, I wouldn't go blaming the motor. Furthermore, you still haven't answered the question "are you running a shielded CAS wire?" in the last pictures where you can see the big end bearing on the bottom of that rod it looks like it has a significant amount of wear...there are DEFINITELY factors other than piston and rod strength at work here. Possible oil starvation, detonation, etc. Even though you were tuned, these ECUs really screw with the piggybacks settings...timing changes anyway, fuel changes..so unless you were datalogging at the time that the motor let go...you'll never know if your tune was really running the way it was supposed to.

Sorry to hear about it though...hope it's back up running soon.

 

ROFLMAO

 

No, that was one small blip on one test car in another country. This crank angle sensor issue is a myth to me as far as I can see. Regardless, when I write code for the MS2 standalone im installing after I build my motor I will have a full log of the crank angle sensor. Then I can see if it's really a problem.

Heh, that's just plain silly. You can't see berring damage in a photo. Trust me, the berrings are smooth, and the crank journals are fine. No signs of oil starvation what so ever. Why do you think I pulled the rods? Not like I can salvage this block.

 

ok


Phunk had a photo of a big end bearing a while back on here that was worn more than it should be...it was very easy to see in the picture. So your picture had a wierd reflection or something and it looks like wear but it's not, no problem.

What about the rest of my post...care to share with everyone just why you are calling the stock internals crap? If the stock internals are so weak why are there stock VQs running around with 100whp more than you were without any issues? I understand that you're probably a little upset that your motor grenaded...I would be too...but don't be so quick to stick blame when you really have near no idea what actually happened.

 

ok maybe don't call them crap, call them pathetic
those who ran without blowing up have been lucky/ had better tolerances in the build of the motor from the factory (we talked about this months ago-a tight motor can come out of nissan on monday, while a sloppy one can be produced on tues--)
and withstand more abuse..

hasn't every blown motor had some sort of rod failure??? maybe detonation induced (most likely), but a stronger set of rods are at least much more forgiving-true, no engien can withstand sustained detonation, but theoretically, a sloppy, stock vq will probably give you less than a handful of grace before blowing...

so, the internals are pathetic, not crap...better???

 

i would really like to see the results when you get to this. It would be a really good confirmation.

I don't really like to just trust one source. And that particular source i'm pretty skeptical about.

 

I 2nd that.

Az

 

lets send an SIR to BN and get QRF out there!

LMFAO!

 

Ok...well that theory sounds good on paper...but it really doesn't hold any weight in in the current situation.

Lets look at some FACTS.

FACT: All of the VQs that have blown up under boost lately are running Greddy TT kits, most of them at low boost.
FACT: There haven't been S/Ced cars blowing up since the early days of the no timing pull ATI kit
FACT: NOT ONE APS TT kitted Z has blow up that we know of and ALL of them run 8psi or higher. There are plenty of them out there now and some with over 20K miles already.

I find it really hard to believe that the theory of "differnent tolerances" is even possibly true...if that were the case..we'd see APS TT'd Z's blowing up as much or MORE (since they run more boost) than Greddy TT'd Zs.

 

Well now that I actually have a rod in hand I can tell you from personal experiance they are crap. They are heavy, and they are not very strong. They look like a rod out of a NA 4 cyl like my daily beater. Nissan always used heavy rods, but at least they were beefy. If some one showed me this rod a couple years ago no way would I believe it's out of a nissan. Whatever. I'm not even slightly mad, I'm not stoked about rebuilding the car but I don't really care cause it will be even better once I'm finished with it. Plus I have another 400 hp car to drive to work.

 

accordfreak, Whenever I build another MS I can just tap into the stock crank signal at the ecu and log it. No plans to do it any time soon, I've got too many projects going on right now.