smoke on WOT acceleration EEK!!
Thread Starter
Race Director
Joined: Nov 2000
Posts: 17,103
Likes: 39
From: stop the fun suckers
smoke on WOT acceleration EEK!!
Since the 383 build up I have noticed smoke in the rear view mirror after a WOT acceleration (or I should say during).. BTW: Its not from the tires
anyways.. It looks greyish I guess but definatly not white! The engine has well over 3000 miles on it since the build up.. everything is basically stock except..
I put in a comp cam. H269 cam, its stroked to 383, I bumped up the compression to 10.8:1, removed the cats (the one side plugged) and have had the chip re-programmed by PCMforless..
I sent the chip back once already to be re-tuned.. and then emailed the guy the data so he could check out teh work.. he says it looks great "within 3% of ideal" in referring to the possibility if its rich or lean..
is this normal? was this stuff burned off by the cats when the motor was stock? I pulled the plugs and they look fabulous.. no oil on them at all..
any help, advice or personal experiance anyone would like to share would be much appreciated.
thanks :auto:
anyways.. It looks greyish I guess but definatly not white! The engine has well over 3000 miles on it since the build up.. everything is basically stock except..
I put in a comp cam. H269 cam, its stroked to 383, I bumped up the compression to 10.8:1, removed the cats (the one side plugged) and have had the chip re-programmed by PCMforless..
I sent the chip back once already to be re-tuned.. and then emailed the guy the data so he could check out teh work.. he says it looks great "within 3% of ideal" in referring to the possibility if its rich or lean..
is this normal? was this stuff burned off by the cats when the motor was stock? I pulled the plugs and they look fabulous.. no oil on them at all..
any help, advice or personal experiance anyone would like to share would be much appreciated.
thanks :auto:
Le Mans Master
Joined: Oct 2001
Posts: 5,302
Likes: 2
From: Atlanta GA
Re: smoke on WOT acceleration EEK!! (BluByU)
Brings a new meaning to your forum alias :lol: :jester
Seriously though, it sounds like perhaps your rings didn't seat properly and a little bit of oil is blowing by. With 3k miles on it, I'm sure it's not the various lubes used for the building process. You might want to have a leak-down check done to check the compression in your cylinders. Good luck. :cheers:
Seriously though, it sounds like perhaps your rings didn't seat properly and a little bit of oil is blowing by. With 3k miles on it, I'm sure it's not the various lubes used for the building process. You might want to have a leak-down check done to check the compression in your cylinders. Good luck. :cheers:
Team Owner
Joined: Nov 1999
Posts: 32,782
Likes: 11
From: Former NCM Drag Racing coordinator, National director Corvette Challenge Spring Hill, Tennessee: Whiting, New Jersey
Cruise-In VI Veteran
Cruise-In VII Veteran
Re: smoke on WOT acceleration EEK!! (BluByU)
What oil pump do you have??? If it's a super high pressure it could be pumping the oil out of the pan into the heads and the excess oil could get blown past the valve stem seals.
Thread Starter
Race Director
Joined: Nov 2000
Posts: 17,103
Likes: 39
From: stop the fun suckers
Re: smoke on WOT acceleration EEK!! (Lone Ranger)
its tough to quantify 'wisp' and 'ton of smoke' usually at WOT i'm looking forward.. however, I have noticed it is more than it was when it was stock..acutally i never noticed this when it was stock.. I say its greyish.. because its usually in a low light situation that i noticed it.. early morning.. dusk type situations.. so i'm not sure if its blue (oil) or black (rich)..
I guess the real quesiton should be.. does removing the cats and stoking the motor to 383 have the potential to cause more black (rich) smoke to exit the exhuast during WOT? oh and it smokes more @ higher RPMS then it shifts and smokes little till it builds the revs high again.. BTW: at this time my injector DC is around 82%
I guess the real quesiton should be.. does removing the cats and stoking the motor to 383 have the potential to cause more black (rich) smoke to exit the exhuast during WOT? oh and it smokes more @ higher RPMS then it shifts and smokes little till it builds the revs high again.. BTW: at this time my injector DC is around 82%
Thread Starter
Race Director
Joined: Nov 2000
Posts: 17,103
Likes: 39
From: stop the fun suckers
Re: smoke on WOT acceleration EEK!! (BluByU)
also not sure if this matters.. but..
running stock injectors, stock throttle body, 160 thermostat and fans reprogrammed to come on at 180*
running stock injectors, stock throttle body, 160 thermostat and fans reprogrammed to come on at 180*
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Intermediate
Joined: Jul 2003
Posts: 30
Likes: 0
From: Vancouver BC
Re: smoke on WOT acceleration EEK!! (BluByU)
Before you go to far, you really should find out if it's black smoke or not. Maybe have a budy drive behind you when you get on it. Make sure the car is nice and warm doing it.
Le Mans Master
Joined: Feb 2002
Posts: 7,858
Likes: 2
Re: smoke on WOT acceleration EEK!! (yak driver)
Before you go to far, you really should find out if it's black smoke or not. Maybe have a budy drive behind you when you get on it. Make sure the car is nice and warm doing it.
Race Director
Joined: Feb 2003
Posts: 11,671
Likes: 20
From: Lake Wylie SC
Re: smoke on WOT acceleration EEK!! (Lone Ranger)
Before you go to far, you really should find out if it's black smoke or not. Maybe have a budy drive behind you when you get on it. Make sure the car is nice and warm doing it.
:iagree: Good way to insure your buddy stays behind you is to be sure he's in a Mustang... :lolg:
:iagree: Good way to insure your buddy stays behind you is to be sure he's in a Mustang... :lolg:
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: smoke on WOT acceleration EEK!! (Strick)
:lolg: ... good one.
You might jack the car and inspect the exhaust system to see if any oil is dripping onto it.
Also, monitor oil & coolant levels.
If you are running without cats it could just be a little rich at WOT. What does the O2 sensor show during a WOT run?
You might jack the car and inspect the exhaust system to see if any oil is dripping onto it.
Also, monitor oil & coolant levels.
If you are running without cats it could just be a little rich at WOT. What does the O2 sensor show during a WOT run?
Pro
Joined: Sep 2003
Posts: 670
Likes: 1
From: charlotte nc
Re: smoke on WOT acceleration EEK!! (BluByU)
how is a leak down test performed?
It's a much better indication of the condition of a cylinder( rings, valves, etc.) than a simple static compression check. BTW the engine needs to be warmed up or the test will not be accurate.
These instruments are relatively inexpensive ($100 to $200)and are routinely used in aircraft maintemance. They can be purchaced from aircraft parts companies who cater to experimental aircraft homebuilders.
Le Mans Master
Joined: Feb 2002
Posts: 7,858
Likes: 2
Re: smoke on WOT acceleration EEK!! (dwestsr)
These instruments are relatively inexpensive ($100 to $200)and are routinely used in aircraft maintemance. They can be purchaced from aircraft parts companies who cater to experimental aircraft homebuilders.
