smoke from exhaust on dyno

[sho95]

just wondering if this smoke is normal coming from the exhaust.
I dont beat on the car but when it was strapped down it spit out some smoke.
[ame=http://s276.photobucket.com/albums/kk27/sho95/?action=view&current=95SHO.flv]95SHO.flv video by sho95 - Photobucket[/ame]

 

[supercarkiller]

maybe youre kiniblin pin is loose or muffler bearings need repacking? check youre knuetin valve as well. try kaleco.com

 

[ITS STOCK]

I think black/grey smoke is rich, someone correct me if i am wrong, what was your a/f ratio?

 

[sho95]

a/f is 11.8

 

[NasteeNate]

Looks normal, but I'm not a tuning guru.

 

[Fat-cat]

Its fine just unburnt fuel.. Could have been a little spark blow out in the upper RPM range and didnt ignite all the fuel

 

[03cobra#694]

its fine just unburnt fuel.. Could have been a little spark blow out in the upper rpm range and didnt ignite all the fuel

+1

 

[Stopsign32v]

Sounds like alittle belt slippage too

 

[Powershift03]

Yep, unburnt fuel is my guess too. Mine did it when I had a 2.76 pullied Eaton. It was bet slip. I ended up running a shorter belt, and ground off the stop on my tensioner to fix it.

[ame=http://videos.streetfire.net/video/Dyno-pulls-on-my-Cobra_84883.htm]Dyno pulls on my Cobra. 450 rwhp 460 torque - Car Videos on StreetFire[/ame]

 

[OrangeMach23]

just wondering if this smoke is normal coming from the exhaust.
I dont beat on the car but when it was strapped down it spit out some smoke.
95SHO.flv video by sho95 - Photobucket

Are you running off road or catted exhaust?

 

[Jefe]

Yep mine did it too in the upper rpms on the stock tune. Sniffer showed my A/F around 11.9/1

 

[outlaw10.5guy]

looks to me like spark is going away top end what plugs are you running

 

[670 of 4993]

id say unburnt fuel or carbon blowing out

 

[OrangeMach23]

id say unburnt fuel or carbon blowing out

Exactly what I was thinking. Mine blows out carbon when I get on mine.

 

[sho95]

Are you running off road or catted exhaust?

Catted kooks x

looks to me like spark is going away top end what plugs are you running ?

Tr6 gapped at 28

Thanks guys

 

[98kingcobra]

just blowing the suit out. from not getting on it

 

[WhippleBlowJob]

Tr6 gapped at 28

Thanks guys

28?

Try around 32-34. I usually gap down to 28 for nitrous to avoid blowout. I would say try 34. And look at your graph...take out all smoothing and see if your boost is fluctuating up top.

 

[LS1-Larry]

Hey not to thread jack but I did a 145mph run lastnight against my buddys CBR 600 and Im not sure if this just started but im just noticing on START UP ONCE IN A WHILE....that a puff of light grey or white smoke comes out! It dosent come out any other time....should I be worried?
Ill be changing the plugs tomorrow!
Thanks and again no offense to the OP just asking!

 

[95_XB331]

If you're dipping around and below 11.5 A/F you will see some smoke, usually gray if you have cats, black if not. Also, sometimes the AFPR (common) or electric pump (rare) could be weak/leaking on one run and then holding pressure on the next.

If there's belt slip or a bypass problem, the computer will adjust the A/F, and you'll see a flat-line in the MAF voltage or via the boost gauge of course and it should not get rich, but lean.

You should try a 0.032-34 gap... the more until you get blowout, the better.

As for white smoke, make sure you're not getting blow-by and shooting oil out of dipstick, VCXs, etc... and leaking on the pipes...

 

[WhippleBlowJob]

You should try a 0.032-34 gap... the more until you get blowout, the better.

Like I said.....:beer: