Tial BOV question
wha wha wha whaaaaaaaaaa? 
Dec 30, 2005, 08:30 PM
#17
Alrighty heres the deal. I will need the 9lb spring so I can get my afr's correct for low speed driving/cruising. Apparently the 7lb is too weak for my application. The valve is open during cruising makeing the car run very rich. AFR's are in the 9.9-10.2 while cruising but will climb if I keep giving the car throttle, then depending how much gas I give the car the afr's are in the 13.5-14.7 range (10% throttle).
So hopefully I can find one this weekend before I have to drive back home, so if anyone knows of a shop that carries them in stock please let me know. I called Titan and they don't carry them in stock. Going to try CFT tomorrow.
So hopefully I can find one this weekend before I have to drive back home, so if anyone knows of a shop that carries them in stock please let me know. I called Titan and they don't carry them in stock. Going to try CFT tomorrow.
Dec 30, 2005, 11:37 PM
#18
Evolving Member
iTrader: (15)
Join Date: Aug 2005
Location: [North] Dallas, TX
Posts: 486
Likes: 0
Received 0 Likes
on
0 Posts
Why don't you read my previous post history before you start childish banter about IQ's.
The post about the adjustment was an honest mistake because I was pretty sure I had seen an adjustment screw on a Tial...and tightening it would be a logical next step.
Now, about your idle scenario. Are you saying that while you are at idle, and the entire intake system is under vacuum, that air is being forced out the valve? Since you feel your IQ is higher than mine, then I would appreciate the science lesson.
The post about the adjustment was an honest mistake because I was pretty sure I had seen an adjustment screw on a Tial...and tightening it would be a logical next step.
Now, about your idle scenario. Are you saying that while you are at idle, and the entire intake system is under vacuum, that air is being forced out the valve? Since you feel your IQ is higher than mine, then I would appreciate the science lesson.
Originally Posted by dryad001
Did you read my entire post? Or are you assuming that you know whats happening without reading? Please before more stupid posting goes on please read the entire thread, think about it a little, then post.
I see the IQ dropping in here lately
I see the IQ dropping in here lately
Dec 30, 2005, 11:41 PM
#20
Evolving Member
iTrader: (15)
Join Date: Aug 2005
Location: [North] Dallas, TX
Posts: 486
Likes: 0
Received 0 Likes
on
0 Posts
I certainly would believe that if our turbos were BB from the factory...or if had seen a MAP test on the UIC pipe show a pressure reading.
BTW every BOV that was open at idle on a car I've owned/worked on has caused lean AFR's, not rich.
BTW every BOV that was open at idle on a car I've owned/worked on has caused lean AFR's, not rich.
Originally Posted by Fourdoor
You are blowing out at idle.
Even at idle the turbo is spinning (slow by on boost comparison, but it IS spinning) blowing low pressure air into the intercooler and associated pipeing.
Keith
Even at idle the turbo is spinning (slow by on boost comparison, but it IS spinning) blowing low pressure air into the intercooler and associated pipeing.
Keith
Last edited by ez; Dec 31, 2005 at 12:00 AM.
Dec 31, 2005, 01:12 AM
#21
Originally Posted by dryad001
Alrighty heres the deal. I will need the 9lb spring so I can get my afr's correct for low speed driving/cruising. Apparently the 7lb is too weak for my application. The valve is open during cruising makeing the car run very rich. AFR's are in the 9.9-10.2 while cruising but will climb if I keep giving the car throttle, then depending how much gas I give the car the afr's are in the 13.5-14.7 range (10% throttle).
So hopefully I can find one this weekend before I have to drive back home, so if anyone knows of a shop that carries them in stock please let me know. I called Titan and they don't carry them in stock. Going to try CFT tomorrow.
So hopefully I can find one this weekend before I have to drive back home, so if anyone knows of a shop that carries them in stock please let me know. I called Titan and they don't carry them in stock. Going to try CFT tomorrow.
Keith
Dec 31, 2005, 01:17 AM
#22
Originally Posted by ez
I certainly would believe that if our turbos were BB from the factory...or if had seen a MAP test on the UIC pipe show a pressure reading.
BTW every BOV that was open at idle on a car I've owned/worked on has caused lean AFR's, not rich.
BTW every BOV that was open at idle on a car I've owned/worked on has caused lean AFR's, not rich.
Keith
Dec 31, 2005, 08:22 AM
#24
Evolving Member
iTrader: (15)
Join Date: Aug 2005
Location: [North] Dallas, TX
Posts: 486
Likes: 0
Received 0 Likes
on
0 Posts
If that's that case, I'm not sure why I have not seen the turbo spin enough at idle to create evacuation. And I just experienced this recently on my car with a bad valve that was stuck open at idle...and AFR in the 19-20 range until I forced it shut manually.
Thanks for the follow up Keith...perhaps there were other factors I did not consider.
Ethan
Thanks for the follow up Keith...perhaps there were other factors I did not consider.
Ethan
Originally Posted by Fourdoor
A stock 1G dsm with a 14b turbo has a slight positive pressure in the intercooler and IC pipes at idle. If you take off the recirc line on ANY turbocharged car it will be blowing out a small amount of air at idle. Aftermarket BOV's are usually set up to be completely closed at idle instead of partialy open at idle like the stock BOV because most people run them vented to atmosphere. If open at idle and vented to atmosphere on a car still using a MAF you will run rich at idle, and mega rich on shifts.
Keith
Keith
Dec 31, 2005, 12:09 PM
#25
Originally Posted by ez
If that's that case, I'm not sure why I have not seen the turbo spin enough at idle to create evacuation. And I just experienced this recently on my car with a bad valve that was stuck open at idle...and AFR in the 19-20 range until I forced it shut manually.
Thanks for the follow up Keith...perhaps there were other factors I did not consider.
Ethan
Thanks for the follow up Keith...perhaps there were other factors I did not consider.
Ethan
Keith
Dec 31, 2005, 02:08 PM
#26
Evolving Member
iTrader: (15)
Join Date: Aug 2005
Location: [North] Dallas, TX
Posts: 486
Likes: 0
Received 0 Likes
on
0 Posts
It would not run very long that way before dying. I was actually quite close to home, so I was able to limp there and park the car. Of course, it did not take me very long to fix the issue. It was used valve...I disassembled it and found some gunk in it from the previous owner. I had another valve, so I replaced it and solved the issue permanently...
Originally Posted by Fourdoor
19 to 20 range? WOW! Hope everything is OK with your engine after that. Was there any damage from running that lean? I wonder what caused the lean condition? Could what ever cause the BOV to stick open also have resulted in a fuel supply problem?
Keith
Keith
Mar 14, 2006, 05:04 PM
#27
I figure I would bring this thread back since there is another question I have now. Since putting alky back on my car with a SMC kit I started tuning and noticed at WOT at 26psi the valve flutters just a little bit. At 20-24 the valve is shut with no fluttering. Is this the limit of the 7lb spring? Now I still have the 7lb spring inside never found anyone with a 9lb. Also I am moving up in turbo size soon, next month or so.
