Supercharged VQ37 Goes BOOOM

CrownR426 · 03-22-2011, 07:21 PM

Wait what...?
Who doesn't tune their car after they get forced induction?
That's really silly...
Can't blame stillen for making a kit sounds like the installation itself was a disaster.

efuseakay · 03-22-2011, 07:36 PM

10psi. Something that was missed. I bet the owner messed with the boost.

Staples · 03-22-2011, 07:44 PM

If it was seeing more then 9psi then there were boost spikes, possibly by weather or other factors.

BalanBro · 03-22-2011, 07:36 PM

Jordo's right. It doesn't matter who did the tune, at WOT, the ECU is in open loop mode which ignores the O2 sensor(s). It reads the MAF signal and has an internal look-up table to determine how long the injectors are to be open at a given rpm. It's up to the tuner who is manipulating this table to ensure that adequate fuel is present in each cell of the MAF load vs rpm table.

Similarly, there is a second MAF load vs rpm table for ignition timing that the tuner has the ability to adjust.

If you set either of these incorrectly, the car has the potential to detonate either from running lean or from having too aggressive ignition timing.

Also, a good, conservative tune should be able to compensate for slight variations in flow to through the engine. Increased flow from lets say, an exhaust should regester as increased flow through the MAF, which should in turn instruct the injectors to stay open longer. It won't be perfect, but it seems odd that headers alone would move you from conservative/safe to instant failure. I bet the original tune was borderline from the get. Maybe not with respect to AFR, but possibly with timing which is much more challenging to optimize.

zzdudaka · 03-22-2011, 11:05 PM

I am curious to learn more about this and the cause. Many questions to be answered as far as i can see. Is the owner of the car not on the forum? Why has he not posted any additional info? Obviously he would want to refrain from posting if he did anying to possibly void the warranty? Keep quiet ; ). am Currently leaning toward the gtm, but no decision is made. I find it frustrating however that the first response from many folks is to speculate and light the torches as a first response. Soooo many details left out. It would be nice if we could just get factual info. This would help those of us still figuring things out come to a decision based on fact. I understand the experience some have had with stilen and by no means do i disregard that I do appreciate them sharing, but i would also like to suggest that stillen does add value to the community and to developing products for our cars. I like having choices for products for my car.

toner123 · 03-23-2011, 01:16 AM

hey some people are jumping to conclusions and making it seem like the missing pieces of the puzzle are the ones they added in. Stop with the torches and wait till we find out what the complete report is before we put some one to the stake and set the ground on fire. Just not enough information yet to determin fault.
Frank

Brazilbro · 03-23-2011, 01:37 AM

Theres so much we don't know yet to start the finger pointing. Lets wait till all the info is in.

haggomyeggo · 03-23-2011, 09:58 AM

subscribed this is getting good

definitionxmk · 03-23-2011, 10:02 AM

The FI section is like a Korean Drama

Red__Zed · 03-23-2011, 11:47 AM

the amount of misinformation and misunderstanding in this thread makes my head hurt.

Jordo! · 03-23-2011, 01:34 PM

Although I agree companies should take some responsiblity for doing adequate R&D before selling products, I think the issue here is moot.

I'm sure any warranty offered is for a locked tune and unaltered set-up. Meaning, if you change the tune or any major aspects of the set-up, you are effectively out of warranty.

Changing pulleys, headers, or tuning parameters will potentially greatly alter how the car runs, and that is beyond the control of the company that designed the kit.

If nothing was altered, car was driven normally, and something went pop, certainly the warranty should stand, and we could question the R&D of the company that developed the kit.

Here, I think, it's all wait and see...

christian370z · 03-23-2011, 01:39 PM

Quote:

Originally Posted by BLM

Not to be fresh, but are you a Communist? Everything isn't made equally.

LOL.

Xander117 · 03-23-2011, 02:48 PM

So this is where all the cool kids are

toner123 · 03-23-2011, 03:09 PM

Let's chill with the attacks and see where this thread develops so we can find out what happen to educate us instead of getting it locked and we don't find out anything. Stillen is involved and there being active in this thread. By makin assumptions and jumping on them with out knowing the cause is goig to make them not want to post shot about this an lean more towards a **** them attitude.
Frank

Kastley85891 · 03-23-2011, 03:08 PM

Change what you want on a F.I. motor, it will be fine.... classic

03-22-2011, 07:21 PM	#1 (permalink)
CrownR426 A True Z Fanatic Join Date: Nov 2008 Location: South Korea Posts: 4,676 Drives: Manual Rep Power: 849	Wait what...? Who doesn't tune their car after they get forced induction? That's really silly... Can't blame stillen for making a kit sounds like the installation itself was a disaster. __________________ Love + Hardwork + Passion RIP SVTRacer

03-22-2011, 07:44 PM	#3 (permalink)
Staples Track Member Join Date: Sep 2010 Location: Baltimore, MD Posts: 546 Drives: '08 Infiniti G37s Rep Power: 17	If it was seeing more then 9psi then there were boost spikes, possibly by weather or other factors. __________________ '08 Infiniti G37s - Forced Induction Fed

03-22-2011, 07:36 PM	#4 (permalink)
BalanBro Enthusiast Member Join Date: Apr 2009 Location: NJ Posts: 318 Drives: 40th Anniv. 370Z Rep Power: 1113	Jordo's right. It doesn't matter who did the tune, at WOT, the ECU is in open loop mode which ignores the O2 sensor(s). It reads the MAF signal and has an internal look-up table to determine how long the injectors are to be open at a given rpm. It's up to the tuner who is manipulating this table to ensure that adequate fuel is present in each cell of the MAF load vs rpm table. Similarly, there is a second MAF load vs rpm table for ignition timing that the tuner has the ability to adjust. If you set either of these incorrectly, the car has the potential to detonate either from running lean or from having too aggressive ignition timing. Also, a good, conservative tune should be able to compensate for slight variations in flow to through the engine. Increased flow from lets say, an exhaust should regester as increased flow through the MAF, which should in turn instruct the injectors to stay open longer. It won't be perfect, but it seems odd that headers alone would move you from conservative/safe to instant failure. I bet the original tune was borderline from the get. Maybe not with respect to AFR, but possibly with timing which is much more challenging to optimize. __________________ 2012 Mercedes C63 AMG P31 Sedan, ROW, aFe, Eurocharged Dyno Tune. 438WHP/415WTQ 2010 SOLD: 40th Anniversary 370z

03-22-2011, 11:05 PM	#5 (permalink)
zzdudaka Base Member Join Date: Oct 2010 Location: South Carolina Age: 50 Posts: 130 Drives: 40th AnniverZary 370 Rep Power: 16	I am curious to learn more about this and the cause. Many questions to be answered as far as i can see. Is the owner of the car not on the forum? Why has he not posted any additional info? Obviously he would want to refrain from posting if he did anying to possibly void the warranty? Keep quiet ; ). am Currently leaning toward the gtm, but no decision is made. I find it frustrating however that the first response from many folks is to speculate and light the torches as a first response. Soooo many details left out. It would be nice if we could just get factual info. This would help those of us still figuring things out come to a decision based on fact. I understand the experience some have had with stilen and by no means do i disregard that I do appreciate them sharing, but i would also like to suggest that stillen does add value to the community and to developing products for our cars. I like having choices for products for my car. __________________ Happy Z Motoring! zzdudaka 2010 40th Anniversary 370Z #357

03-23-2011, 01:37 AM	#7 (permalink)
Brazilbro A True Z Fanatic Join Date: Mar 2009 Location: Indianapolis, IN Posts: 1,131 Drives: Juke/240Z Rep Power: 850	Theres so much we don't know yet to start the finger pointing. Lets wait till all the info is in. __________________ Juke AWD/240Z SR20 08 Evo 10(Stage 2) SOLD Fastest Sport 6spd 370Z 11.8 @126.5SOLD

03-22-2011, 07:36 PM	#2 (permalink)
efuseakay Enthusiast Member Join Date: Mar 2010 Location: The DAYNGA ZONE! Posts: 404 Drives: 2010 G37xS Sedan Rep Power: 17	10psi. Something that was missed. I bet the owner messed with the boost.

03-23-2011, 01:16 AM	#6 (permalink)
toner123 Track Member Join Date: May 2010 Location: chesapeake va Age: 41 Posts: 823 Drives: TT 370z Touring/SP Rep Power: 18	hey some people are jumping to conclusions and making it seem like the missing pieces of the puzzle are the ones they added in. Stop with the torches and wait till we find out what the complete report is before we put some one to the stake and set the ground on fire. Just not enough information yet to determin fault. Frank

03-23-2011, 09:58 AM	#8 (permalink)
haggomyeggo A True Z Fanatic Join Date: Mar 2011 Location: IL Posts: 1,723 Drives: Steves old cars Rep Power: 19	subscribed this is getting good

03-23-2011, 10:02 AM	#9 (permalink)
definitionxmk Track Member Join Date: Jul 2009 Location: Los Angeles CA Posts: 973 Drives: Stage 2 SC 370Z Rep Power: 18	The FI section is like a Korean Drama __________________ *FALKEN . AMUSE . STANCE . INVIDIA . MINES . TOMMY KAIRA . BRIDE . VOLK RACING . GTM* Featured in DSPORT issue #137 - Follow me on Instagram: @definitionxmk

03-23-2011, 11:47 AM	#10 (permalink)
Red__Zed A True Z Fanatic Join Date: Jul 2010 Location: window seat Posts: 28,940 Drives: Mostly on two wheels Rep Power: 121	the amount of misinformation and misunderstanding in this thread makes my head hurt.

03-23-2011, 01:34 PM	#11 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 420	Although I agree companies should take some responsiblity for doing adequate R&D before selling products, I think the issue here is moot. I'm sure any warranty offered is for a locked tune and unaltered set-up. Meaning, if you change the tune or any major aspects of the set-up, you are effectively out of warranty. Changing pulleys, headers, or tuning parameters will potentially greatly alter how the car runs, and that is beyond the control of the company that designed the kit. If nothing was altered, car was driven normally, and something went pop, certainly the warranty should stand, and we could question the R&D of the company that developed the kit. Here, I think, it's all wait and see... __________________ Enjoy it. Destroy it.

03-23-2011, 02:48 PM	#13 (permalink)
Xander117 Enthusiast Member Join Date: Feb 2011 Location: Warner Robins, GA Posts: 446 Drives: 370, z71, R6 Rep Power: 16	So this is where all the cool kids are

03-23-2011, 03:09 PM	#14 (permalink)
toner123 Track Member Join Date: May 2010 Location: chesapeake va Age: 41 Posts: 823 Drives: TT 370z Touring/SP Rep Power: 18	Let's chill with the attacks and see where this thread develops so we can find out what happen to educate us instead of getting it locked and we don't find out anything. Stillen is involved and there being active in this thread. By makin assumptions and jumping on them with out knowing the cause is goig to make them not want to post shot about this an lean more towards a **** them attitude. Frank

03-23-2011, 03:08 PM	#15 (permalink)
Kastley85891 A True Z Fanatic Join Date: Nov 2009 Location: ATX 370 - Sold Posts: 1,149 Drives: 2003 Wagon Rep Power: 19	Change what you want on a F.I. motor, it will be fine.... classic __________________ Boosted V8 hunter 2850 lbs and 375WHP

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