DSM T25 on a 2.2L S10
02-09-2011, 06:13 PM
#12
0.0 BAR
Thread Starter
Join Date: Jan 2011
Posts: 20
Ok guys I have a few more if you have the time. Been searching and reading enough to make me dizzy. Didn't find any real answers to these again....
Where is the best place to install the BOV (1G dsm)? Before or after the intercooler? I also have heard as close to TB as possible but how close... 6", 12", etc? Does it get mounted 90 degrees to charge pipe or at a specific angle?
On the wastegate side of things... how far away from the turbine outlet do I reintroduce the wastegate "waste" into the main exhaust? And from what I have read this one should enter at a 45 degree angle for best results?
On a side note I have the fuel pump and injectors in hand today thanks to UPS.
Where is the best place to install the BOV (1G dsm)? Before or after the intercooler? I also have heard as close to TB as possible but how close... 6", 12", etc? Does it get mounted 90 degrees to charge pipe or at a specific angle?
On the wastegate side of things... how far away from the turbine outlet do I reintroduce the wastegate "waste" into the main exhaust? And from what I have read this one should enter at a 45 degree angle for best results?
On a side note I have the fuel pump and injectors in hand today thanks to UPS.
02-09-2011, 10:10 PM
#13
0.0 BAR
Join Date: Jun 2010
Posts: 15
90* is fine, and anywhere in the intercooler pipe will work for the bov. The difference, if any, will be negligible. The 1g bov will have no problem venting whatever volume the t25 can throw at it.
I would just try to find a DSM "o2 housing." Plenty of people have made plenty of power on the stock casting and it will re-join the wastegate flow fairly well. 1g and 2g are the same internal casting besides the o2 sensor placement. Tubular ones are cheap, too, although again the stock casting has worked fine especially after some cleaning/matching at the outlet.
I would just try to find a DSM "o2 housing." Plenty of people have made plenty of power on the stock casting and it will re-join the wastegate flow fairly well. 1g and 2g are the same internal casting besides the o2 sensor placement. Tubular ones are cheap, too, although again the stock casting has worked fine especially after some cleaning/matching at the outlet.
02-10-2011, 09:58 AM
#14
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Join Date: Jan 2011
Posts: 20
The only issue I have seen when I looked into using a stock dsm o2 housing is they make a fairly sharp 90 bend shortly after the outlet flange. With how I am placing the turbo in my truck I need it to be a straight outlet. It won't make any bends till a good 12" (at least) after the outlet and even then a 90 would run the exhaust right into the frame rail.
But you did bring up another question I forgot about… the o2. How far back from the outlet should I place it?
But you did bring up another question I forgot about… the o2. How far back from the outlet should I place it?
02-10-2011, 10:46 AM
#15
1.5 BAR
Join Date: Oct 2009
Location: CHICAGO
Posts: 935
bov position doesnt matter as long as you dont have a maf sensor which you dont. just make sure you hook up the bov vacuum signal to an intake manifold source. my current vehicle has the bov mounted on the charge pipe about 1.5 feet after my turbo. ive seen some people mount them on the charge pipes going into the intercooler or on the intercooler itself to project the most noise.
you want the o2 sensor as close to the outlet as possible. the farther away from the turbo you get the more inaccurate it will be. as far as your down pipe. it will have to all be custom made. purchase a turbo downpipe flange and start building the downpipe you need.
make sure the wastegate dump pipe enters the downpipe at least 6-8" away from the turbo as it will cause a turbulant restriction in exhaust flow.
90 degree bends will work as a transition but the smaller the bend degree, the better the exhaust flow. with low boost this makes no difference so using 90 degree pipe transitions will be the easiest way to go.
you want the o2 sensor as close to the outlet as possible. the farther away from the turbo you get the more inaccurate it will be. as far as your down pipe. it will have to all be custom made. purchase a turbo downpipe flange and start building the downpipe you need.
make sure the wastegate dump pipe enters the downpipe at least 6-8" away from the turbo as it will cause a turbulant restriction in exhaust flow.
90 degree bends will work as a transition but the smaller the bend degree, the better the exhaust flow. with low boost this makes no difference so using 90 degree pipe transitions will be the easiest way to go.
02-10-2011, 11:09 AM
#16
0.0 BAR
Thread Starter
Join Date: Jan 2011
Posts: 20
Excellent info guys, thank you!
BOV I plan to recirculate, I want it as quiet as possible. Rather people not even know it has a turbo. But on location, notes have been taken.
I do have an outlet flange I plan to use to build a custom downpipe for the reasons I already mention. But as far as bringing in the wastegate gasses in, again notes taken. o2 sensor I can put anywhere I want so I will make it as close to the outlet as I can.
All information is stored for when the actual build begins. Thank you guys greatly for all ideas & experiences shared, it is appreciated.
busa4... do you have any pics of the s10 you built?
BOV I plan to recirculate, I want it as quiet as possible. Rather people not even know it has a turbo. But on location, notes have been taken.
I do have an outlet flange I plan to use to build a custom downpipe for the reasons I already mention. But as far as bringing in the wastegate gasses in, again notes taken. o2 sensor I can put anywhere I want so I will make it as close to the outlet as I can.
All information is stored for when the actual build begins. Thank you guys greatly for all ideas & experiences shared, it is appreciated.
busa4... do you have any pics of the s10 you built?
02-11-2011, 02:29 PM
#18
0.0 BAR
Thread Starter
Join Date: Jan 2011
Posts: 20
Ok guys. Are you sick of me yet?
Last one for awhile till I get rollin' on the actual build. I think I have every base covered by now. Sitting there last night clocking the turbo for my install and I have 2 vacuum nipples on the turbo… where do I connect these on a NA motor?
Wastegate nipple connects to…
Compressor housing nipple connects to...
I did a lot of searching but only find stock or modified dsm routing with a wastegate solenoid which I obviously won't be running.
No manual boost controller either as I won't be going over the 8psi the wastegate is set at factory.
Last one for awhile till I get rollin' on the actual build. I think I have every base covered by now. Sitting there last night clocking the turbo for my install and I have 2 vacuum nipples on the turbo… where do I connect these on a NA motor?
Wastegate nipple connects to…
Compressor housing nipple connects to...
I did a lot of searching but only find stock or modified dsm routing with a wastegate solenoid which I obviously won't be running.
No manual boost controller either as I won't be going over the 8psi the wastegate is set at factory.
02-14-2011, 07:57 AM
#20
1.5 BAR
Join Date: Oct 2009
Location: CHICAGO
Posts: 935
are you using the internal wastegate? i thought you were using an external wastegate. cap off the nipple on the compressor housing. run a vacuum/boost line from the intake manifold to the turbo wastegate actuator. this will help prevent boost creep.
