so i just installed my N2o kit its a N.O.S plate and solenoids well i hit for the for time and every thing when great had a A.F.R of 13.0 13.1 (on a AEM UGOE wideband) really did move well when i hit it again a it went fine than shifted and had a bad miss so i stop and now the car has a miss all the time...the A.R.F is at 14-15.5 under normal driving but with a bad miss and im blowing smoke out the tail pipes...so i open the hood and found oil on the underside and along the intake but found the pcv tube was off the pcv valve...i i think i bunt a hole in my piston causing the smoke and the miss but im not to sure but i would like advice about if it is a shot piston do they make replacement stronger pistons for the stock bore? or should i build this bore this block? or look in to say L92 or something like that?
Oh the car it self is a 01 ws6 with a t56 i have it tuned with hp turner and the basic bolt on minus HEADS/CAM
so if you have and more info need ask...and thanks in advance to all who reply
Thanks Mike...

 

13:1 is TOO lean for a nitrous run, specially with stock pistons.

Do a compression test. It'll tell you which bank you have the problem.
You need to pull heads to know for sure what the damage is.

 

I personally think an afr of 13.1 is WAY too lean on nitrous. I like mine around 11.8:1 when on the bottle and around 12.8:1 n/a.

 

My wideband reads 13.3ish when the plugs look clean... AFR from a wideband is not how you should be tuning nitrous.

OP, do a compression test and report back. If it blew the line off the pcv, the infamous LS1 pcv system could blow oil everywhere... doesn't sound good, but the pcv issue could be causing the smoking. Also, that 13.1 could have been a false reading if the car had too much fuel jet, possibly hurting a ring land and causing the smoke

 

Nothing wrong with 13.1 AF as long as the timing is pulled back far enough.

I would not reccomend a novice tuner start at 13.1 AF though.

 

Wayne is right... Lean is mean if you keep the timing under control and have the skill....

Unfortunately, I think that IF you hurt the bullet, you had too much fuel jet and hurt something that way. It would possibly read false lean on the WB, since it reads O2 rather than fuel. If its super rich, a WB can read lean. What did the tuneup look like (jets, timing, weather conditions, etc.) ?

 

Lean didn't kill it . over timing killed it.

It may not be hurt completly. pull the plugs see if there all there. compression test it at the least leak down if you can. you would be suprised how many guys get lucky and burn a plug but the piston is fine.

remeber its an oxygen sensor. its not a fuel sensor. its reading unburnt oxygen in the exhaust.

 

ill do the compression and leakdown....i think the timming killed me as well tho...and i didnt tune the car off the wide ban...but it was a street tune me and my buddy did i was just use the af as a info tool for help but thanks guys keeep the ideas/thoughts/suggestions/comments coming
thanks again
mike

 

I might sound like a bitch but I'm too scared to put a bottle in my car lol.

 

wow i had a buddy with a ram air trans who wanted to blow up his ls1 on purpose he had a stroker engine on the way an car was stock all only thing it had was a hypertech an he even left it on an sprayed a 200 shot all it did was blow air box off .....

 

You guys are crazy.

 

No guts, no glory !

 

OK guys...did alil diagnose the car to day... so first i check for spark and i i had spark all cyl....so i started pulling plugs 1.2.4.6.8 were looking good and 3.5.7 here black and oily as hell...started to do compression tests 1.2.4.6.7.8 were all between 195-210 psi...(7 really surpized me...i woulda swore that it was a bad one confused so that leaves 3 and 5 both of them where below 60psi ....i didnt do a leak down test cuz the heads are coming off now to assess the damage ....so thats what i got as of now it you guys want ill keep this updated along the way so let me know and if you have questions/commets/suggestions/thoughts/ post it up! could use all the input there is
Thanks
Mike

 

how much timing did you have in the car? what plugs? what size shot?

 

well i just got off the fone with my friend (the one who tuned it for me) and to my mistake we added timing to the motor so i think there is 4 degrees of timing as for a plugs i run ngk tr6s wit .35 gap and according to a jetting calulator i running a 135 shot.. hope that helps as far as my firend that tuned it he lives 4 1/2 hrs away form me and i dont know any body with hp tuner around me so i cant get it retuned unless i do a mail order tune...

 

Well... I guess the bottle I sold you worked? Lol Sorry to hear about your luck. Keep us posted and keep your chin up.

 

lol yup sure did

 

you had 4 more degrees than stock, so like 31-32? dang

I've seen guys(and done it myself) spray 100 on a stock timing table, 28 degrees and not burn anything up, but i'm sure 13.1 a/f and 31 degrees made it eat itself. that sucks man. You can get forged stock bore pistons all day.

I'm assuming yall didnt look at the timing mark on the plugs

 

Hate to say it but this post right here is what gives nitrous a bad name, amatuer tuners who dive right in to nitrous not fully knowing what to do.

Good luck with the fix and do your research next time. Maybe get someone with more experience to tune it as well.

 

I'm not blaming the n2o I take responsiblity for what happened...I'm not looking for excuses....**** happens so fix it now if it happens agian I could see your point