Supercharged VQ37 Goes BOOOM

BeachZTT · 03-22-2011, 01:42 PM

There is NO substitute for wideband AFR on an FI motor, period. Something as simple as a hose or clamp failure can cost you a motor.

weiboy718 · 03-22-2011, 01:50 PM

I'm so glad I switched kits before anything happened. Too bad I'll never know if it's done any damage to my engine or not.

Nixlimited · 03-22-2011, 02:07 PM

Quote:

Originally Posted by weiboy718

I'm so glad I switched kits before anything happened. Too bad I'll never know if it's done any damage to my engine or not.

You could get a leak-down check done.

tomnavone · 03-22-2011, 02:36 PM

Quote:

Originally Posted by GraphiteG37S

My buddy is selling his after just two weeks cause he said they rattle too much and it gets super annoying every time he drives the car.

Stillen wouldn't take it back? After months of hounding stillen they returned my money minus a bs restocking fee. Who would buy this kit after all the problems people have had with it?

#452-LE · 03-22-2011, 02:56 PM

I got nothing, but I wipe the sweat from my brow every time I hear of this happening. Thank the heavens above I went with GTM.... and Sam is my sheppard!!

Viera · 03-22-2011, 03:00 PM

Ouch, Charlie!

A.J@CarbonSignal · 03-22-2011, 03:48 PM

Sad to see this happen.....I'm wondering who claimed that the car doesnt require a tune after adding the headers?

wishihadnav · 03-22-2011, 03:52 PM

damn!..hope the owner gets this all sorted out..

weiboy718 · 03-22-2011, 03:53 PM

Quote:

Originally Posted by A.J@CarbonSignal

Sad to see this happen.....I'm wondering who claimed that the car doesnt require a tune after adding the headers?

Maybe it's the same person from Stillen who told me "DETONATION IS NORMAL" lol

jnaut · 03-22-2011, 03:59 PM

Quote:

Originally Posted by GraphiteG37S

My buddy is selling his after just two weeks cause he said they rattle too much and it gets super annoying every time he drives the car.

Then it was installed incorrectly, should only opened the holes to a tight fitment.

Cmike2780 · 03-22-2011, 04:09 PM

I don't know what you guys are babbling on about.....sounds like a limp mode issue to me

Staples · 03-22-2011, 05:11 PM

Stillen's kit uses an UpRev canned tune with their "turn-key" kit. UpRev uses the MAF sensors to actually tune the car, just like a factory tune. Think about it, we buy these cars worldwide; different elevation, different gas, different variances.

When you're tuning the vehicle, the MAF sensor is compensating the air, so if you say at full throttle I want to keep it around 11.5 - 11.6, then the MAF will compensate the air/fuel to see as close to those measurements as possible. Why do you think when you go with GTM's turbo turn-key kit, you don't need a custom tune sent to you if you decide to add test pipes, a 3" exhaust or anything else (thanks to the blow-through style MAF setup)? A lot of it has to do with Timing too. If you don't have an aggressive timing, you can get away with extra mods without needing a new tune.

What I think the issues is... the pull-through MAF system. You're not getting an accurate measurement of the air that's reaching the engine because it's being changed when it blows through the charger.

I've done a lot of research on this and there are a couple members I'd like to personally thank that have given me great insight on their review of this kit.

I could be wrong though

weiboy718 · 03-22-2011, 05:29 PM

Quote:

Originally Posted by Staples

Stillen's kit uses an UpRev canned tune with their "turn-key" kit. UpRev uses the MAF sensors to actually tune the car, just like a factory tune. Think about it, we buy these cars worldwide; different elevation, different gas, different variances.

When you're tuning the vehicle, the MAF sensor is compensating the air, so if you say at full throttle I want to keep it around 11.5 - 11.6, then the MAF will compensate the air/fuel to see as close to those measurements as possible. Why do you think when you go with GTM's turbo turn-key kit, you don't need a custom tune sent to you if you decide to add test pipes, a 3" exhaust or anything else (thanks to the blow-through style MAF setup)? A lot of it has to do with Timing too. If you don't have an aggressive timing, you can get away with extra mods without needing a new tune.

What I think the issues is... the pull-through MAF system. You're not getting an accurate measurement of the air that's reaching the engine because it's being changed when it blows through the charger.

I've done a lot of research on this and there are a couple members I'd like to personally thank that have given me great insight on their review of this kit.

I could be wrong though

Jordo! · 03-22-2011, 05:34 PM

Quote:

Originally Posted by BLM

If adding headers caused the AFR to run so lean that this happened it seems like the original tune was $hit anyway.

Most ECU's are in open loop at WOT, so there aren't any fuel trims to tweak the tune towards a target AFR.

That said, even if the Z ECU can maintain a target AFR at WOT, under load the change may have happend so fast that the ECU couldn't compensate in time (or pull timing fast enough if it detected knock) so boom.

Can anything out there get a readout from the OEM knock sensor? I know uprev can't.

I suppose folks could try a J&S safeguard.

RCZ · 03-22-2011, 06:25 PM

Yes and you completely missed my point. You were trying to make an argument that the tune is crap because it didnt have room for an unknown amount of leaning out. Not to mention their tunes are, in my opinion, too safe.

Oops, you're too busy trying to be a smartass to understand things. Thanks for the basic-as-bricks tuning lesson and advice.

A good tune should sit at somewhere between rich and lean...where it's supposed to be. An exhaust mod can swing that balance towards lean and blow it up in no time. Yes you do want to tune some margin of safety into your target afr, but loss of power isnt the only downside of running rich. Believe it or not, running rich can also lead to increased cyl pressures which can cause detonation and blow up the motor. Neither extreme is healthy.

Regardless, Its not whether I'm a stillen fan, I haven't really talked to anyone from stillen in months and judging by their lack of presence here, it seems almost as if they have packed their bags. It has nothing to do with that, just trying to add some sense of objective information to this thread that would otherwise be filled with misinformation...

Could it have been the boost? sure. Is it more likely that it was the headers he had just put on the car? sure.

Sorry I picked you to intervene and make a point, nothing personal bud.

Carry on with the torches and pitchforks folks.

Quote:

Originally Posted by BLM

My point was that there should have been some room for fluctuations. Adding a header should not lead to a blown motor. "So perfect"?? Seriously? If it's teetering on the edge of the leaner side of the optimal AFR, changing elevations would mess with it.

OOPS, just saw your sig. You're a stillen guy. My apologies. I saw one of those "so perfect" stillen tuned superchargers up against a GTM on a dyno. People who have installed both speak of the fitment with the stillen and how it makes you fit your car to the kit rather than the other way around.

Either way I feel terribly for the owner but why he would romp on it without a tune is beyond me.

Just goes to show he simply wanted to go fast and didnt have the knowledge. I'm not saying he had to build it himself, but to invest all that money and not understand that he shouldn't get on it until it was properly tuned doesn't add up. It's really his fault. If all he wanted was power then yea, lean it out with the current set-up. But he should have told the tuner to leave it a little on the richer side if he was planning on headers all along.

03-22-2011, 01:42 PM	#61 (permalink)
BeachZTT Track Member Join Date: Jul 2009 Location: Colorado Posts: 746 Drives: '10 BC ZR T/S/Nav Rep Power: 17	There is NO substitute for wideband AFR on an FI motor, period. Something as simple as a hose or clamp failure can cost you a motor. __________________ '10 ZR Black Cherry Sport/Touring/Nav, Swift Springs, Stillen G3s, 15mm-F 20mm-R Spacers, SPC, Spoiler Solutions Rear Wing, Stubby Antenna

03-22-2011, 02:56 PM	#65 (permalink)
#452-LE Base Member Join Date: Dec 2009 Location: Behind Dulles AP Posts: 117 Drives: '09 370Z 7AT-Stg2 TT Rep Power: 16	I got nothing, but I wipe the sweat from my brow every time I hear of this happening. Thank the heavens above I went with GTM.... and Sam is my sheppard!! __________________ '06 R6 track,'06 R1-LE track,'09 848 street, '11Duc Multistrada 1200ST, '07 STi T-back '09 GTM stg2 TT-370Z-7AT (470whp/ 422wtq @10PSI)

03-22-2011, 03:48 PM	#67 (permalink)
A.J@CarbonSignal Track Member Join Date: Feb 2011 Location: Dubai Posts: 581 Drives: '05 TT350z, '07 Z06 Rep Power: 16	Sad to see this happen.....I'm wondering who claimed that the car doesnt require a tune after adding the headers? __________________ CarbonSignal Automotive *Facebook*

03-22-2011, 04:09 PM	#71 (permalink)
Cmike2780 A True Z Fanatic Join Date: Jun 2010 Location: Long Island Posts: 5,059 Drives: slowwww Rep Power: 29	I don't know what you guys are babbling on about.....sounds like a limp mode issue to me __________________ [09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R] [ArchitTEK Photography]

03-22-2011, 05:11 PM	#72 (permalink)
Staples Track Member Join Date: Sep 2010 Location: Baltimore, MD Posts: 546 Drives: '08 Infiniti G37s Rep Power: 16	Stillen's kit uses an UpRev canned tune with their "turn-key" kit. UpRev uses the MAF sensors to actually tune the car, just like a factory tune. Think about it, we buy these cars worldwide; different elevation, different gas, different variances. When you're tuning the vehicle, the MAF sensor is compensating the air, so if you say at full throttle I want to keep it around 11.5 - 11.6, then the MAF will compensate the air/fuel to see as close to those measurements as possible. Why do you think when you go with GTM's turbo turn-key kit, you don't need a custom tune sent to you if you decide to add test pipes, a 3" exhaust or anything else (thanks to the blow-through style MAF setup)? A lot of it has to do with Timing too. If you don't have an aggressive timing, you can get away with extra mods without needing a new tune. What I think the issues is... the pull-through MAF system. You're not getting an accurate measurement of the air that's reaching the engine because it's being changed when it blows through the charger. I've done a lot of research on this and there are a couple members I'd like to personally thank that have given me great insight on their review of this kit. I could be wrong though __________________ '08 Infiniti G37s - Forced Induction Fed Last edited by Staples; 03-22-2011 at 05:14 PM.

03-22-2011, 01:50 PM	#62 (permalink)
weiboy718 Track Member Join Date: May 2010 Location: Bay Area Posts: 923 Drives: Infiniti G37 Rep Power: 16	I'm so glad I switched kits before anything happened. Too bad I'll never know if it's done any damage to my engine or not.

03-22-2011, 03:00 PM	#66 (permalink)
Viera Track Member Join Date: Feb 2009 Location: Atlanta, GA Posts: 897 Drives: '09 M.Blue 370Z 6MT Rep Power: 264	Ouch, Charlie!

03-22-2011, 03:52 PM	#68 (permalink)
wishihadnav A True Z Fanatic Join Date: Nov 2009 Location: 90090 Posts: 1,851 Drives: Force Fed Nismo Rep Power: 184	damn!..hope the owner gets this all sorted out..

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