rock solid 12.4 af ratio on a wideband o2

wrist pin failure @ 6 psi

in search of a new motor hehe

rod poking out back side of block, will have pictures soon after motor is disassembled

horray for chromoly rods and pistons on order ><

anyone else toast a motor @ 6 psi yet? greddy TT mind you

Nick

 

I'm in Sacramento and toasted a motor at 6 PSI with a SCer but it was a combination of mid 12's for fuel (more like close to 13) and timing while dynoing in July-August heat.

Did it die on the dyno and what was the timing set at?

 

That sux that you roasted a motor now for the good of science and all mankind please be more specific as to why and how this happened!

pre ignition sounds like.

What kind of timing control were you running?
what octane gas?
how long has the kit been on the car?
hear any pinging b4 it went?
what cylinder was the failure? I guess # 5 or #6
why not try to run sub 12 A/F ratios?
what other mods were on the car?
were you running the profec-eo1 to control the e-manage?
were there any signs leading up to this or was it just kind of like boom your motors toast!
What rpm did it go at?

thanks any info will be appreciated welcome to the forum!

 

Well that gives me the shivers...welcome and thanks for posting.
Ditto what SQUILL asked.

Good luck w/the new engine.

 

Man, sorry to hear about that. If you have more info, it would be much appreciated.

 

Lemme guess... No intercooler or BOV, right?

--Steve

 

Thats really strange. I bet there is no timing control. Rinning on 8.5psi for the last 7k+ (last two oil changes). Temps getting close to 100 and still no problems here. Spaz.

 

uh yes intercooler and apexi twin chamber bov. :P

running the greddy emanage and e-01 with things richened up for safety reasons didn't want to throw a rod.. which apparently i did. ><

had timing pulled and at 5 psi was sitting @ a 13ish af ratio hitting 327 to the wheels. upped it to 6 psi on the dyno and called it a DAY @ 339 HP 304 TQ

looks like number 5 cyl detonated and sheared the wristpin. was @ 5500 rpm or so and had an egt spike to 890 so i attempted to cut it off but it was too late.

didn't notice pinging. as other than the dyno and the time i blew it up i never really got on it.

this is the first motor that i had that didn't literally blow tons of chunks everywhere. rod was intact when i saw it dangling off the crank in the oil pan. still need to pull the motor but don't have the want or energy to do so atm.

maybe i just got a monday motor >< anyone wanna buy a used greddy tt kit? heh j/k

 

Sorry to hear about your motor. Your numbers seem really low, most people Ive seen hit around 340-360 to the wheels @ 5.5 psi and that is running the rich base map. Your a/f near 13.1 is too lean to run with FI imo...how much timing did you have pulled BTW?

 

I was under the impression that anywhere from 11.5-12.8 A/F is fine as long as your timing is corrected?

 

i'd have to check the e-01 i'm not sure offhand.

this entire project has been a serious pain in the butt.

started out with getting the kit. had to pick it up from greddy the friday before the install.

banjo bolt broke 5 min before firing her up. (was leaking torqued it down like 1/8 turn)

e-01 installed apparently no maps in the emanage at all

greddy was "uh we accidentally forgot to put a program in the emanage we sent you. here have some values to enter"

entered the values. didn't seem right as the af was way lean on start up.

spent 4 hours dynoing and tuning the map. 100 degree weather while dynoing >< was frustrated.

cooled down to bout 70 at night and i was ready to test the tuned car. 4th gear 5500ish rpm car just poofs.

took down the oil pan today. ha no wrist pin failure sadly, excessive detonation. piston in cyl 5 is in many little pieces, shrapnel in the head. may need a entire motor depending on how bad my machinist thinks the head is.

wonderful day it is

 

I knew it!!! Chalk up another motor destruction to plenum/tuning.

Thats really obsurd that your e-manage did not have a base map.
Will Greddy do anything for you?

you mention 13ish A/F ratio this is no suprise to me that your motor went..you know due to the factory plenum design you might have actually been alot leaner in the #5 and 6 cylinders as they are starved for air this has been well documented.

Your Forum name suggests you work at a shop and should be fairly competant at tuning vehicles (am i correct?)

Why oh why run the car that lean??

 

Nick...sorry to question your authenticity here. But who are you? And is this a true story? Just seems very fishy...especially given the comments you are making about the Greddy kit, tuning, the eManage maps. (the profec doesn have maps...you cleared out the eManage by probably updating it with the Profec). And some other discrepancies.

THe base map is SUPER rich........so unless you messed up the settings, you should have been in the 11.5 range...even richer.

Again, not trying to be a ***** here...you story seems very fishy..that's all, and given you only have 3 posts to your name, I am skeptical.

 

Yes, I am definately callling ******** here. You claim to have a rod poking out the block, but you think the engine is salvageable?And how bad the head damage is??? This is nuts....and I am not believing this at all.

 

Hah, you sure sound like a *****

 

Have we seen any Greddy TT cars blow up yet....actual documented cases? For what it is worth I sold my spare motor to a gentlemen in the southern US who lost his motor on his maiden voyage with his Greddy TT. I don't know the particulars of why he lost his original motor ( tuning, timing, etc) .....just that he needed a new one for his Greddy 350Z. This is just an example of if the tuning and install with this kit is not absolutley perfect....you're asking for trouble.

 

I have not seen one documented and corroborated case of a blown Greddy engine.....boosted and tuned within reason.

In fact, I havent even seen one blown greddy kit.

 

heee heeee heee i didnt want to jump to conclusions to fast but i call BS as well untill some pics are posted or you post something that makes you sound like you know how to tune vehicles...

again not trying to be a pr!ck as well but come on A/F ratios in the 13's with boost @ 5500 rpms stop the madness! the stock ecu likes to be in the high 12's at that rpm.

 

That street address and zip code are South Sac where most of the Import shops are. I have no reson not to believe him.

Although I would be very bummed if it was me and not so calm about it.

It was 100 degree yesterday here I can confirm that so probably hotter inside a shop.

I guess I will await pics before forming an opinion. Or I could drive by there if I was motivated enough, maybe after more caffeine.

Then again I don't know jack about turno's all of my time went into supercargers so I plead ignorance on that.

 

My appoligies for my dickyness...

I have seen posts similar to this..and I am just leary until I see some pics, or factual documentation. Remember the ATI blow-ups? First a few guys actually did blow their motors, then suddenly..like 100plus people claimed to have blown up their cars!!! Yeah right.

If this did in fact happen, then I am all ears..and totally willing to learn and help anyway possible.