I will say this to keep the thread going. On the dyno it showed 6.2 pounds with the 7 pound kit and was too lean for my tatstes and of course we didn't know about the timing issues back then. Carry on!

 

not trying to bring up any old ghosts. its because of guys like you that we know what we do now about the engine and are able to have guys push 400+whp reliably. thanks for sticking through it

 

Sounds like this was a case of bad tuning and/or improper install.


I still stand behind my statement...but with a slight modifcations.

I have yet to see or hear of a Greddy TT kit that has blown a motor that was properly installed and running normal sub 12:1 A/F Ratios and standard'ish boost settings.

ZRAYGO's was an improper Profec adjustment that cuase his boost to spiike to 12psi or so. YOu cant blame the greddy kit for that.

 

i want to see rock hard evidence of a motor blowing due to internal engine component weakness.... so far im not sure if ive heard of one yet.....

This is just another case of bad tuning which is more of the same.....

Max sounds like ur car blew up right after being tuned....

Sounds like this one blew up ON the dyno!!!

I wonder if you take your car to a tuner and they proceed to blow up the motor on the dyno during their tuning ...i wonder what they would do or say......

Are they liable???

Nick if that was a customers car what would you do?

 

powertrip, this is the biggest thing to me. It is not like people will come here bragging about a blown engine, so we really just don't know for sure about blown engines.

Now, this is the reason that Nick coming here was rare. It is rare a tuner would come here and admit a blown engine at risk of hurting some of his business. Normally, it is the customer coming here complaining first, and maybe the tuner will come in and try to defend themselves.

So, in turn, I believe many of you here have attacked Nick, and really we should be happy for any info that he gives us about what happened to that car.

Obviously, Nick is a standup guy, if he wants to post about what happened, that is good. If he doesn't want to post it, guess what, he doesn't have to. Nick, I welcome anything you post or have to say, cause you didn't have to say anything.

As for cylinder 5, everyone keeps on bringing up how a lean condition in this cylinder would cause the blow up, cause of the way the intake plenum is made from the factory. Maybe I am missing something here, but with the factory plenum, cylinder 5 & 6 run richer, not leaner than the rest of the cylinders.

Putting an aftermarket plenum on there would make those cylinders run leaner. So with the factory plenum, I just don't see how cylinder 5 would actually run leaner than the rest of the cylinders, it should run richer cause of lack of airflow. Now, in a boost application, it should get more airflow, but not anymore than any of the other cylinders.

 

i might have screwed up... >< i'm honestly not sure i'm still doing the autopsy.

and if it was a customer car i could honestly point to the disclaimer on the back that you sign before any work is done but i'm not that evil. i wouldn't have honestly tuned it as aggressively if it was a customers car.

More info later after i get more taken apart on the car.

 

cylinders # 5 and 6 are closest to the fire wall of the car ...this is where the factory plenum is tallest any allows the freest flowing of air...thus running leaner.

cylinders # 1 and 2 are towards the front bumper of the car this is where the factory plenum is 1" shorter causing a more restricted airflow thus running richer.

This has been very well documented there are many many threads here about it ... do a search and you will see.

Trust me the factory plenum causes lean conditions in the #5 and #6 cylinders ...Locally a shop i went to that has torn apart 2 Vq motors for forged internals were suprised at the condition the #5 and 6 cylinders were in compared to the other 4 even though we have less air to begin with up here in colorado (5600 ft) and the engins being low miles both i believe under 13k if i remember correctly.

All the photos ive seen as well clearly show # 5 and 6 cylinders with the tell tale signs of lean conditions.

 

..man.. i just read this thread from the beginning..

some of you guys are a bunch of punks.. who made you all the masters the VQ... i knew of two other greddy TT failures before this one.. just because they dont post doesnt mean it doesnt happen.. if my motor blows. hell yea i'm going to post.. so none of you do the same thing i did...

if Nick is saying he blew his motor, then i would be concerned since it might happen to any one of us. why would anyone want to pretend that it did blow? you think he's doing it for fun?

i hope you finds out what happened, nick. cuz we can all learn from each other's mistakes. that looks like a serious catastrophic engine failure for that rod to blow out that bad-


--Cheston

 

ditto on what ches said

 

Point taken, I had cylinders #5 & 6 mixed up with #1 & 2. Had the numbers reversed, sorry. This would make alot more sense.

Just lay off Nick a bit, no reason to insult him. A man standing up and saying he may have made a mistake is rare, our egos are usually too big for something like that.

 

I am trying not to be to harsh with him ..i am trying to give him the benifit of the doubt ..you read my posts right???

I havent outright insulted him have I??

If you read his first few posts it really sounds like someone that doesnt have the first clue...however it does seem that he should/does know what he is doing.

maybe he was rushed for time or something.

I am really interested to find out what really hapened but seriously i am astonished that this could happen in the hands of a competent tuner ....maybe there are other factors at play who knows untill we get all the info..

Hopefully we will get a detailed breakdown once Nick has time i for one am seriously intrigued as to what EXACTLY happened!

I dont think many shops would want to make this public for fear of getting a bad name or whatever but the info could be invaluble for future greddy tuners/installers.

 

This is the point of what I am saying, he doesn't have to post anything, so he is doing us a service by posting this info. I am not trying to make you an example, Squill, just saying in general we shouldn't come down on him as hard as some posters in this trend have done.

 

here is what happened to me

https://my350z.com/forum/showthread....573#post898573

 

although i "still" am baffled at what happened as i'm still racking my brain because i don't have datalogs of the adventure.. i'm formulating new solutions to the problem

i got a question... anyone know offhand if the coil on plugs on the vq have the driver in the coil or a seperate driver.

thx in advance

 

we are not punks...we are skeptics....we need more data, or its pointless to post something like this.....

I honestly thought the first few posts were written by some kid trying to screw around. I am mean..who celebrates a blow-up??But after seeing the pics, I am not doubting his car blew up....

And yes...if i blow up my car....I'll have a post and write-up on the boards within the hour...just find me a Starbucks with a hotspot!.

 

^ your sarcasm isn't making anything better

quit gaining up on Nick

Nick, i apologize for these people who are treading on your misfortune,

A crate vq35de is around 5k +

 

Nick -sorry to hear

What oil pan is that ?

 

ENOUGH!!!! this is getting slightly rediculous. Can we just focus on the topic at hand? I believe if nick thought we were all just a bunch of a$$holes then he wouldnt bother to keep posting here.

I am here to learn about what hapened to this motor nothing more nothing less.

I dont thnk anyone here is interested in gaining up on anybody.

Nick posts he blew up a motor with the greddy TT kit we are simply interested as to why and how as this information will be very usefull to anybody going F/I in the future in whatever aspect it would pertain to them.

I hope this thread doesnt disolve into useless banter like so many others as im still very interested to findout what happened and by knowing what happened we will learn how to avoid this kind of mess.

Anybody that invests 6-10k or more on their F/I setup always has in the back of their mind a slight cringe of fear as we all know something like this can happen so when it does lets try to learn from it.

Nick if you have a problem with anybody here just let them know about it or use the ignore function... i dont think anybody is here to start pointless and idiotic virtual internet fights or whatever they are.

I do hope you continue to post on this subject i think you will find that the members here are a wealth of knowledge and are more than willing to share usefull info with you and anyone else here and as there are quite a few running the greddy for quite some time they may beable to shed some light for you as well.

As for the coil driver that you asked about i dont know that info but hopefully to get back on topic somebody does and will get u that info asap.

 

I'm no expert on this, but when I burned up my coil packs the ecu stopped sending the signal to the coilpacks because the quad drivers are located in the ecu. Once the quad drivers knew the coil packs were bad they went into a safety mode and stopped sending signal. So I am quite sure the drivers are separate. BTW what plugs were you running?

 

its the greddy oil pan.

thanks joe nismo. i think i'm going to replace the ignition, redo the fuel system, and redo the intake plenum.

but for the plugs i was running lfr6aix-11 the iridiums.

soo...

from what i've put together from the pieces i remember. (since i haven't actually touched the car in 2 days to get the e-01 data) i may have tuned it too lean with not enough timing retard. since it was cyl 5 i "assume" since i did not have 6 egt probes it may have been running lean in that cyl even when i had it at a 12.4 af ratio out the tailpipe on the wbo2.

hopefully when i get a chance to pull the heads off i can really see the conditions of the motor.

Off to work more info this weekend