Test you troubleshooting skills
Check Out This Smoke http://www.villier.net/kyfbody/videos/chrismdyno.wmv
TEST YOUR TROUBLE SHOOTING SKILLS
car was rich in the video, but even after the tune it still smokes at WOT and on deceleration from WOT. after leakdown test and compression check came out good. I was left out in the wind. The guys at TEA say some lS1's just do this. Its a 2000 A4 with only mods being free mods and dual exhaust with Mac heaqders. I put down 315 hp ant 326 tq. corrected. on that run. tell me what you guys think. The car is strong as hell and has done this for ever. I have posted on here about it before, but Nobody realy had any clue withput seeing it ,, so here it s. Also, the car has always been kinga freaky fast in comparison to my friends A4 cars. It did 8.60's bone *** stock and with headers and free mods, it did 8.42 (1/8th mile) SMoking all the way down the track. My wife videoed one of my runs one day and thats thge only reason i noticed the smoke. That was in 2001. the car is still just as strong as ever. and just as smokey
WHATS THE VERDIC DOC???
TEST YOUR TROUBLE SHOOTING SKILLS
car was rich in the video, but even after the tune it still smokes at WOT and on deceleration from WOT. after leakdown test and compression check came out good. I was left out in the wind. The guys at TEA say some lS1's just do this. Its a 2000 A4 with only mods being free mods and dual exhaust with Mac heaqders. I put down 315 hp ant 326 tq. corrected. on that run. tell me what you guys think. The car is strong as hell and has done this for ever. I have posted on here about it before, but Nobody realy had any clue withput seeing it ,, so here it s. Also, the car has always been kinga freaky fast in comparison to my friends A4 cars. It did 8.60's bone *** stock and with headers and free mods, it did 8.42 (1/8th mile) SMoking all the way down the track. My wife videoed one of my runs one day and thats thge only reason i noticed the smoke. That was in 2001. the car is still just as strong as ever. and just as smokey
WHATS THE VERDIC DOC???
Last edited by chrismcdaniel; Feb 3, 2004 at 06:00 PM.
No clue buddy. All I can say is who cars as long as its running good. If its not broke dont fix it.
I had a buddy that went 8.75 in his A4 stock with 50000 miles. Also had a friend who went 8.59 in a M6 stock.
Your results are great but not freaky
I had a buddy that went 8.75 in his A4 stock with 50000 miles. Also had a friend who went 8.59 in a M6 stock.
Your results are great but not freaky
Originally Posted by Cammin BeaSSt
Macs burn oil... burnt oil=smoke
Change headers or enjoy the power...
What do I win??
Change headers or enjoy the power...
What do I win??
You mean that Mac headers cause my car to burn oil? that doesnt sence to me. Why does macs do it, and Others dont? because they are midleanght? if so, does BBK headers force engines to smoke? Thats weird, you are the first person in three years to give me that explination.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0
Brett Foote
Originally Posted by Cammin BeaSSt
Do a search on MACS, lotsa people have had complaints of oil consumption/ burning with these. I do agree all headers/ORYs will smoke a lil, but Macs tend to lead the group...
When I ran MAC's, I had the same issue, but after installing a catch can the blowby stopped. $20.00 particle filter from PepBoys. Run it off of the existing PCV to the intake. Seems to do the trick, and alot cheaper than new headers.
Can't answer your question about "why" folks get this condition after installing MAC's, but it does seem to be widespread. Possibly the scavenging effect of the midlength's? Dunno.....not sure anyone does.
Can't answer your question about "why" folks get this condition after installing MAC's, but it does seem to be widespread. Possibly the scavenging effect of the midlength's? Dunno.....not sure anyone does.
well I appreciate all you guy's opinions, This realy the first I have heard of this In 3 years of asking Folks. I definately am going to get a greddy catch can. thanks alot guys.
TECH Junkie
Joined: Dec 2001
Posts: 3,242
Likes: 0
From: Lakeland, FL
I have seen alot of threads in the past about people who install Macs have smoke afterwards. But if the leakdown and compression came out good then screw it haha!! You can now literally fart on ricers with your fbod hehe.
On The Tree
Joined: Dec 2002
Posts: 173
Likes: 5
From: Flower Mound, TX
Haven't looked at the video yet, but based on your symptoms and when they occur, it's because you're pulling oil through the PCV system when you have alot of vacuum in the intake (i.e. deceleration, and WOT) Either a simple catch can or a switch to the LS6 style PCV system should help alleviate the problem.
It's caused by two things happening. 1. at WOT and decel after WOT, you aggitate (for a better lack of words) the oil in the top of the motor, around the rockers, causing alot of it to become airborn and some atomize. 2. At those same conditions, you're pulling alot of vacuum, and are then pulling all that aggitated oil through the PCV system, since it draws from the valve covers and the PCV valve (actually the whole system) sits sideways, it's not helping to stop the oil from making it's way into the intake.
Hope this helps!
Matt
It's caused by two things happening. 1. at WOT and decel after WOT, you aggitate (for a better lack of words) the oil in the top of the motor, around the rockers, causing alot of it to become airborn and some atomize. 2. At those same conditions, you're pulling alot of vacuum, and are then pulling all that aggitated oil through the PCV system, since it draws from the valve covers and the PCV valve (actually the whole system) sits sideways, it's not helping to stop the oil from making it's way into the intake.
Hope this helps!
Matt
TECH Resident
Joined: Nov 2002
Posts: 996
Likes: 0
Mine did the same thing after I installed my Macs w/ORP, and even worse after Hotcam. I figured it was blow-by (low tension oil rings). At WOT your PCV system is useless, that why many people run vacuum pumps when using low-tension oil rings. These stock low-tension rings seem to be just fine with sotck exhaust, cam, etc... But once you start changing stuff, some people run in to trouble. Appearantly Macs are more prone to causing this.
I hooked up my air pump as a kind of supplimental vacuum pump that only activates near WOT. It only pulls about 4 pounds of vacuum, but it has cut the smoke down to almost nothing... I guess the slight amount of evacuation it provides helps a bit.
Tommy
I hooked up my air pump as a kind of supplimental vacuum pump that only activates near WOT. It only pulls about 4 pounds of vacuum, but it has cut the smoke down to almost nothing... I guess the slight amount of evacuation it provides helps a bit.
Tommy
Originally Posted by TaTommyWS6
Mine did the same thing after I installed my Macs w/ORP, and even worse after Hotcam. I figured it was blow-by (low tension oil rings). At WOT your PCV system is useless, that why many people run vacuum pumps when using low-tension oil rings. These stock low-tension rings seem to be just fine with sotck exhaust, cam, etc... But once you start changing stuff, some people run in to trouble. Appearantly Macs are more prone to causing this.
I hooked up my air pump as a kind of supplimental vacuum pump that only activates near WOT. It only pulls about 4 pounds of vacuum, but it has cut the smoke down to almost nothing... I guess the slight amount of evacuation it provides helps a bit.
Tommy
I hooked up my air pump as a kind of supplimental vacuum pump that only activates near WOT. It only pulls about 4 pounds of vacuum, but it has cut the smoke down to almost nothing... I guess the slight amount of evacuation it provides helps a bit.
Tommy
TECH Resident
Joined: Nov 2002
Posts: 996
Likes: 0
Originally Posted by chrismcdaniel
You should realy do a write up on the air pump idea, I have looked in to a small electric vacume pump for the PCV system to just eliminate the use of the vacume from the intake, but its about $250.00.
I'll have to take some pics and I'll do my best to do a write up if people are interested.
Tommy
