TCIC 300ci superbeast
Famous Member
im going to rebuild my motor soon. i know i cant run boost when braking it in but i dont want to change the EX manifold. i was woundering if i can lock the BOV open so it will bypass and wont build PSI.
turbo motor brake in?
- Thread starter TCIC 300ci superbeast
- Start date
Why can't you run boost when breaking in? Any of my motors I just labour the engine for about an hour up and down hills to get pressure behind the rings, change the oil and dirve it steadily for about 100km, then it's all bets off. But I sure don't disable boost, it actually provides a more even pressure per combustion stroke on the bearings than a N/A does.
TCIC 300ci superbeast
Famous Member
well it has a built in bov and its a 15psi stock so im not really going to boost it up. the real prob with just taking the turbo off is that it mounted to the only manifold i have and i dont want to remove the intercooler and boost pipes.
im just thinking of applying psi to the bov and then clamping it off.
now about runing it with the turbo on it. i have been told that i shouldnt brake it in with boost.
in the training classes i learned that foot to the floor = bananas
im just thinking of applying psi to the bov and then clamping it off.
now about runing it with the turbo on it. i have been told that i shouldnt brake it in with boost.
in the training classes i learned that foot to the floor = bananas
Yeah, I would not run 15psi for break-in. Maybe 5-7 wouldn't be an issue, but 15 is a little high IMO. The heat from the turbo would not be dissipated as well, plus the heat from the newly breaking-in of the engine. On top of that, you don't want to be troubleshooting the turbo and engine together if something goes unexpectedly.
turbo250chick
New member
Hi there,
We just rebuilt my motor (Does10s). We break in with everything hooked up. but there's no load on the motor so no boost is built. We just break it in like any other new flat tappet cam rebuild. 3000rpm for 20 minutes to slosh the oil around, ensure oil pressure, and gun it a few times during break in.
Really no difference between motor combos on break in procedure. Just setting the camshaft and ensuring ring seating.
Good luck,
Kelly
We just rebuilt my motor (Does10s). We break in with everything hooked up. but there's no load on the motor so no boost is built. We just break it in like any other new flat tappet cam rebuild. 3000rpm for 20 minutes to slosh the oil around, ensure oil pressure, and gun it a few times during break in.
Really no difference between motor combos on break in procedure. Just setting the camshaft and ensuring ring seating.
Good luck,
Kelly
TCIC 300ci superbeast
Famous Member
i kinda wish i had a turbo with lower boost so i could just add a boost controller.
well i know thw turbo works on my truck, thats way i have to rebuild.
well i know thw turbo works on my truck, thats way i have to rebuild.
The driver can control the amount of boost with a simple device. It's right there on the floor under your right foot. Just don't give it so much throttle! No reason to disable the turbo for break-in. Watch the boost gauge and drive accordingly,and like Ian said,adjust the wastegate.
Terry
Terry
You should be able to drive your car around normally for the breakin, leave the turbo on and everything the way it is just drive it around like an old lady, as long as its not under a big load you wont build boost.
TCIC 300ci superbeast
Famous Member
all right ill brake it in with the turbo on. well bort62 have you ever opened up a stock stamped bov? have fun rebuilding it.
i wish i had a turbo with a lower psi bov( because it have one built in to it) and then i would add a boost controller. crystal?
really well let me say it agin
i wish i had a turbo with a lower psi bov( because it have one built in to it) and then i would add a boost controller. crystal?
" i wish i had a turbo with a lower psi bov( because it have one built in to it) and then i would add a boost controller. crystal?"
Ok,you're talking about the wastegate rather than a blowoff valve (they go in the tube between the compressor housing and the carb). A sealed crimped wastegate actuator can't be adjusted.....true.BUT you can add an external spring that pulls on the wastegate arm that counteracts the wastegate actuator and lets the'gate open earlier. Very easy to do and works like a champ!
Terry
Ok,you're talking about the wastegate rather than a blowoff valve (they go in the tube between the compressor housing and the carb). A sealed crimped wastegate actuator can't be adjusted.....true.BUT you can add an external spring that pulls on the wastegate arm that counteracts the wastegate actuator and lets the'gate open earlier. Very easy to do and works like a champ!
Terry
TCIC 300ci superbeast
Famous Member
well the turbo is a Garrett/airresearch TA0310 or TB0310 it says it only a 7psi but i had a boost gauge on it and its was pushing over 10psi. now on to the spring, it has a WG intergrated in to the EX housing. so i cant add a spring. i really may not be 15psi max but its close. as i have said before my boost gauge goes up to 10psi and it keep boostin past that. but at about 2.25G and 10psi my valves springs were giving out and being forced open. even with all that i was still pulling hard. ill try to take pic of my setup this weekend when i get my top mount. ya i know a top mount isnt as good as a front but im going to have ram flow throught it.
TCIC 312ci":2jap1g4p said:well the turbo is a Garrett/airresearch TA0310 or TB0310 it says it only a 7psi but i had a boost gauge on it and its was pushing over 10psi. now on to the spring, it has a WG intergrated in to the EX housing. so i cant add a spring. i really may not be 15psi max but its close. as i have said before my boost gauge goes up to 10psi and it keep boostin past that. but at about 2.25G and 10psi my valves springs were giving out and being forced open. even with all that i was still pulling hard. ill try to take pic of my setup this weekend when i get my top mount. ya i know a top mount isnt as good as a front but im going to have ram flow throught it.
Good luck, I guess. You've got it all figured out!
TCIC 300ci superbeast
Famous Member
well i have a good idea of what im doing.trial and error.
way are you taking that tone with me?(!) if you dont want to help me, dont
all i wanted to know was how to brake a turbo motor in, with the turbo in hooked up.
way are you taking that tone with me?(!) if you dont want to help me, dont
all i wanted to know was how to brake a turbo motor in, with the turbo in hooked up.
tjnavyblue
Well-known member
I bought a new (unused) Garrett T04 off Ebay, with integrated wastegate. I tested the wastegate off the car with my compressor, and it would start to open at 19 PSI. This seemed high to me. I called Garrett, and the rep mentioned that with exhaust pressure it would probably open 4-7 psi earlier, so 12 - 15 psi. Still seems high for a stock wastegate.
While it sounds plausible, I think the Garrett rep is having a bit of a lend.
The 15 psig actuators are generally turbo diesel application.
I test my actuators with a sphygmomanometer. It's cheap, accurate and controllable.
TCIC 312ci, you need to look at whether your wastegate needs enlarged porting if the actuator is rated at 7psi. Boost creep will occur if the open gate has too much restriction compared to the down pipe pressure drop.
The 15 psig actuators are generally turbo diesel application.
I test my actuators with a sphygmomanometer. It's cheap, accurate and controllable.
TCIC 312ci, you need to look at whether your wastegate needs enlarged porting if the actuator is rated at 7psi. Boost creep will occur if the open gate has too much restriction compared to the down pipe pressure drop.
