I am not sure on the exact measurement, maybe 1/32 or 1/16 of an inch it seems way too much for my liking, i can hear the oils squish around when moving the shaft i am trying to locate a known good used ct-26 for cheap right now to get by until i can do something else.
How to raise boost psi
- Thread starter 89supra7mgte
- Start date
I dont know your financial situation, but Id say save your money and but one from driftmotion. I think they are like 500-600 bucks for a 57 trim.
You can drive the car without making the turbo spool to much. Thats the way I would do it anyways.
You can drive the car without making the turbo spool to much. Thats the way I would do it anyways.
Well i dont need to drive the car would like to only because there is no snow on the ground so i really dont need to drive my truck, but will until getting the turbo fixed along with the boost leak testing. Rather it be done right than go back and re do it all again.
On the boost leak test how would i go about checking the intake manifold plenums? ir would the be something where "if in doubt, change it out" comes into play?
On the boost leak test how would i go about checking the intake manifold plenums? ir would the be something where "if in doubt, change it out" comes into play?
What if i were to go the least expensive way and rebuild it myself? I am very mechanically inclined do you think that its a possibility for someone that has never rebuilt one before?
Sure, you can rebuild it. Id say have somebody that knows a thing or two about turbos around if you do decide to rebuild it yourself.
As for the boost leak tester, I have no idea how youd go about checking it out. I replaced all my vac lines and couplers out, to be sure I wouldnt have a boost leak. And tightened everyting nice and snug.
I think driftmotion has a turbo rebuild kit.
As for the boost leak tester, I have no idea how youd go about checking it out. I replaced all my vac lines and couplers out, to be sure I wouldnt have a boost leak. And tightened everyting nice and snug.
I think driftmotion has a turbo rebuild kit.
Rebuilding a turbo REQUIRES balancing and it also may require machining or new parts. They're not as simple as they appear...
Poodles;1445106 said:
:word8kn: balancing is VERY important. can you rebuild it..yes..do you "have" to rebalance it..thats up to you, 50/50 chance it will be fine or epicly explode where all sm users around the world will be seeing 4th of july all over again!
my opinion, just get one that someone has done professionally so theres no question, and has a warrenty. and DO RESEARCH!!!! so far i am not happy with my choice.
You ARE running rich, because you DO have a boost leak somewhere. Stock IC pipes can be cracked where you can't see it, so looking does not always find it. Build the tester. Regulate the pressure to 20lbs. You will find your leak.
To test the stock BOV, blow through the end where air comes in (near the 3000 pipe). If it blows straight through, it is bad. I don't know how to test the Chinese ebay one. It could well be the cause.
It won't hurt to buy a used turbo to get you by a while. Pay for it with Paypal, so you can file a claim if you get somebodies junk. Many are taken off for the purpose of upgrading though, and have nothing wrong with them. Don't go too cheap though. Buy from a long time member, or somebody who has a good seller rating.
I'd recommend a DrJones Manual Boost Controller............but I'm over a week myself waiting on an answer from him right now on one.
To test the stock BOV, blow through the end where air comes in (near the 3000 pipe). If it blows straight through, it is bad. I don't know how to test the Chinese ebay one. It could well be the cause.
It won't hurt to buy a used turbo to get you by a while. Pay for it with Paypal, so you can file a claim if you get somebodies junk. Many are taken off for the purpose of upgrading though, and have nothing wrong with them. Don't go too cheap though. Buy from a long time member, or somebody who has a good seller rating.
I'd recommend a DrJones Manual Boost Controller............but I'm over a week myself waiting on an answer from him right now on one.
Well i started to build my own leak tester and that shit is difficult. not to build but to find the correct size fittings, the dia of the turbo inlet is 2.75in o.d but ace hardware has nothing in between 2 and 3" i.d. I am going to home depot or lowes tomorrow to see there selection.
I am plannin on testing it two ways when i get it all set up. First i am going to test up to tb, find away to block off end of 3000 pipe. Second way will be to pull turbo elbow off and block off turbo, i will then cap all pcv lines, oil cap and dipstick. Hope this will work in testing the entire system, intake and all. anyone see any flaws in this idea? I know the air will flow through the valves and try to escape through exhaust so ill trap it not sure how much air will actually get down into the crankcase if any, but hope all will work
I am plannin on testing it two ways when i get it all set up. First i am going to test up to tb, find away to block off end of 3000 pipe. Second way will be to pull turbo elbow off and block off turbo, i will then cap all pcv lines, oil cap and dipstick. Hope this will work in testing the entire system, intake and all. anyone see any flaws in this idea? I know the air will flow through the valves and try to escape through exhaust so ill trap it
not sure how much air will actually get down into the crankcase if any, but hope all will workJust got my homemade, and i mean homemade, leak tester finished and tested out it works. When i was testing, found the first leak before 3000 pipe was installed. Is on the plastic outlet tube of intercooler, the one mounted by the bumper. There is a tint pin hole in the factory tab, where the rubber hose hooks to. ill get that fixed up tomorrow and update on any others. Along with the full system test if it works
Do not cap dipstick and oil cap, Prefrably test only the intercooler hoses.
If you pressurize the motor and block off the oil cap and dip stick and any other crankcse vent you will likely pop your cam seals out among other possible things.
How is your exhaust system?
http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=TC&P=5
Auto boost is 4.8 to 6. On my car i saw about six when stock.
Oh yea, Get a real boost gauge.
If you pressurize the motor and block off the oil cap and dip stick and any other crankcse vent you will likely pop your cam seals out among other possible things.
How is your exhaust system?
http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=TC&P=5
Auto boost is 4.8 to 6. On my car i saw about six when stock.
Oh yea, Get a real boost gauge.
The exhaust is ok, its stock still minus cats, they were plugged. I am going to install a mechanical gauge this weekend.
Now that i think about if i were to block off the turbo elbow and apply pressure technically i shouldnt have in pressure in the crankcase correct? I mean i am doing the same thing the turbo is right? the only way i see it getting in would be through valve seals, rings or pcv system from tb, right? I will probably avoid doing that anyways, but if i do i will only add light pressure, would hate to blow out seals. Tonight i only did 10psi, figure i should only add what i plan to run, until i decide to go bigger.
Before my rebuild the stock gauge would read 7. I just dont see how that pin hole got there unless it was always there and the ic hose was keeping it sealed? i did take all the plumbing off except that hard pipe and cleaned it all out, what are the odds?
Now that i think about if i were to block off the turbo elbow and apply pressure technically i shouldnt have in pressure in the crankcase correct? I mean i am doing the same thing the turbo is right? the only way i see it getting in would be through valve seals, rings or pcv system from tb, right? I will probably avoid doing that anyways, but if i do i will only add light pressure, would hate to blow out seals. Tonight i only did 10psi, figure i should only add what i plan to run, until i decide to go bigger.
Before my rebuild the stock gauge would read 7. I just dont see how that pin hole got there unless it was always there and the ic hose was keeping it sealed? i did take all the plumbing off except that hard pipe and cleaned it all out, what are the odds?
Your thinking to hard about the boost leak test, Its only to test the intercooler piping, you dont need to test the engine for boost leaks. Its not the same as running the engine in boost as the pcv system will vent that pressure.
Pressure will go threw the rings, they dont seal perfectly, just good enough that not enough air can escape to prevent lack of compression.
I asked about exhaust because plugged cats will kill boost. But you said your not running them.
You had 7 psi, rebuilt the motor and lost 3 psi?
Pressure will go threw the rings, they dont seal perfectly, just good enough that not enough air can escape to prevent lack of compression.
I asked about exhaust because plugged cats will kill boost. But you said your not running them.
You had 7 psi, rebuilt the motor and lost 3 psi?
Stock boost gauge is fine (unless you're maxing it out).
You can pressurize the motor as well (it will find leaks in the intake manifold) and you don't have to do anything special (leave piping hooked up to throttle body and pressurize turbo inlet).
You can pressurize the motor as well (it will find leaks in the intake manifold) and you don't have to do anything special (leave piping hooked up to throttle body and pressurize turbo inlet).
it was not a complete rebuild just upper end.
I found one leak last night on hard plastic pipe up through fender well, repaired that today. Found another coming from the bov. i had the psi set 10-12 figure i will not be forcing anymore than on this engine. Anyways i started to loosen the blow off valve screw and it would leak more so i tightened up, just enough to stop the leak. Its a cheapy but will work for now, i plan on upgrading all the intercooler lines when i do that ill get a better bov.
I dont think you can just pressurize the whole system as to valves are open any pressure would circulate through engine and out exhaust, correct me if i am wrong. I only wanted to test to see if maybe one of my intake gaskets got dicked during install, however i have no vac leaks. But that doesnt mean it wont boost out right?
well i am going to get my boost gauge hooked up so i have a more real time display then its time to drive!!!!
I found one leak last night on hard plastic pipe up through fender well, repaired that today. Found another coming from the bov. i had the psi set 10-12 figure i will not be forcing anymore than on this engine. Anyways i started to loosen the blow off valve screw and it would leak more so i tightened up, just enough to stop the leak. Its a cheapy but will work for now, i plan on upgrading all the intercooler lines when i do that ill get a better bov.
I dont think you can just pressurize the whole system as to valves are open any pressure would circulate through engine and out exhaust, correct me if i am wrong. I only wanted to test to see if maybe one of my intake gaskets got dicked during install, however i have no vac leaks. But that doesnt mean it wont boost out right?
well i am going to get my boost gauge hooked up so i have a more real time display then its time to drive!!!!
Buy a can of aero start, run the engine and spray a little around the intake gasket, if it's leaking the RPM will change.
OK so i got the new gauge installed, and boost leaks sealed on ic side of things. Took it out for a drive, let it warm up first. Found that i am hitting 7 psi with new gauge stock is still only 4, i can live with that. Noticed that it only likes to hit 7 in second gear, first gear might be too short lived to tell. 3rd 4th and 5th all hit right around six and slowly drop to 5, while still holding pedal constant? Is this a turbo issue or leak still?
At idle i am reading right 14-16 in vacuum, and when on decel it jumps to about 22. Not sure if that helps at all but its there. I have not noticed any fluctuations in vacuum while idle decel or cruise? yeah the gauge reads about 8 in while cruising at light throttle
I am going to spray down the intake gasket areas as IJ suggested in the morning.
At idle i am reading right 14-16 in vacuum, and when on decel it jumps to about 22. Not sure if that helps at all but its there. I have not noticed any fluctuations in vacuum while idle decel or cruise? yeah the gauge reads about 8 in while cruising at light throttle
I am going to spray down the intake gasket areas as IJ suggested in the morning.