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Old 08-29-2010, 12:35 PM   #1
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i just recently turboed my car with a gt25 turbo only running about 8psi. my car smokes a lot and im pretty sure i need a smaller oil restrictor i think the one it came with is like .060 or arond there and it smokes a lot in boost ror high vacuum or high oil pressure. keep in mind this is a brand new turbo. my question is since im running around without an air filter (not driving it very far) could this be the problem im having with bogging for a second when boost starts to come then it takes off fine. im wondering if its because i have no air filter or its because my plugs are maybe fouling because i saw some oil on the compressor housing. everything else on my car is stock except for the turbo. ive also heard that the stock pvc's dont like a lot of boost but mines not leaking at 10psi. also this only happens when i stab at the throttle real quick and the afr goes lean quick then as boost rises it goes back to about 12.5:1
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Old 08-29-2010, 01:42 PM   #2
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what color is the smoke?
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Old 08-29-2010, 05:30 PM   #3
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white it smells like burning oil
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Old 08-29-2010, 06:14 PM   #4
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i just figured out that oil is coming from my turbo i think because it has too much oil pressure. are my seals fucked? will a smaller oil restrictor cure this oil burning problem?
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Old 08-29-2010, 06:22 PM   #5
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When my seals were fucked the oil seeped out through the housings and burned off on the turbo, not through the exhaust. I'd try a smaller oil restrictor and if that doesn't do it then I'd rebuild or look for a new turbo.
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Old 08-29-2010, 06:35 PM   #6
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alright well the turbo i bought is brand new i bought a .035 restrictor but it hasnt got here yet. ive heard of a rivet as a restrictor but how is that done because i might try that in the mean time. when i rev the engine to where oil pressure gauge reads like 60 psi then the oil comes out the compressor housing. i really hope my seals arent effed because the damn thing is brand new. if someone could explain or post pics of the rivet restrictor i would appreciate it
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Old 08-29-2010, 08:28 PM   #7
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What are you running for engine management? I had to fatten up the fuel table above idle to get the car from bogging out in my AEM EMS. I would think the oil thing has absolutely nothing to do with the bogging issue.
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Old 08-29-2010, 10:08 PM   #8
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ok i figured out the burning oil issue i think. i had the little 5/16 vent line coming off the valve cover routed to the up pipe to the throttle body instead of the turbo inlet. as for ems i am not running anything right now but im only boosting to like 5 psi but i dont have an air filter on it and does the location of the o2 sensor have anything to do with it? i have it plugged in after the one for my wideband o2 and im wondering if i should reverse them
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Old 08-29-2010, 10:37 PM   #9
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why are you running around without a filter? all it takes is a small rock to **** up a turbo. as for the oil issue.... why smoke is usually coolant if im not mistaken? and even a .035 restrictor should not be burning oil. is it a ball bearing turbo? as most ball bearing turbos can run fine without a restrictor. doing so could sometimes damage the engine.
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Old 08-29-2010, 10:49 PM   #10
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Quote:
Originally Posted by miata94 View Post
ok i figured out the burning oil issue i think. i had the little 5/16 vent line coming off the valve cover routed to the up pipe to the throttle body instead of the turbo inlet. as for ems i am not running anything right now but im only boosting to like 5 psi but i dont have an air filter on it and does the location of the o2 sensor have anything to do with it? i have it plugged in after the one for my wideband o2 and im wondering if i should reverse them
Your wideband should be the farthest one down stream, and I'm hoping you're at least running a fuel riser. Might be a good idea to post your full setup here.
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Old 08-29-2010, 11:44 PM   #11
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well im not running anything right now for my fuel management. well then maybe thats my problem with it bogging down for a minute and then it goes. my damn charge pipes keep blowing off also and i used tbolt clamps. the guy before me had it and ran 9psi without any tuning just supra injectors and he said it ran fine.
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Old 08-29-2010, 11:46 PM   #12
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well my current setup is a gt25 turbo from cx racing with a custom fmic setup and a 2.5 inch turbo back everything else is stock.
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Old 08-30-2010, 12:21 AM   #13
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Dude you need at least something to add more fuel. At the very least something to increase fuel pressure... How can you think 5psi of boost is going to be fine on a NA car with no modifications at all to the fuel delivery?

Anyways, good luck with the car...
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Old 08-30-2010, 12:40 AM   #14
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well ill probably get some kind of fmu. the begi one looks like a good buy anyone use this ?
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Old 08-30-2010, 12:42 AM   #15
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Dude, I want you to go out to your car RIGHT NOW and unhook the wastegate if you don't want it to blow up.

Read the FAQs. You can't even run 1psi without fuel management. Ever wonder why so many Hondafags blow up engines? Because they think like you do, they think they can run their NA cars without fuel management because they're just running a little bit of boost. Guess what? DOESN'T ******' WORK THAT WAY.

I'm not exaggerating, I'm not barfing up some random **** I heard one guy say, if you continue to drive around with your car as it is YOU WILL BLOW THE **** UP. Soon. Save your engine. Stop driving it, or at least unhook the wastegate, go read EVERY SINGLE FAQ. If you still have a noobish question, ask it and point out that you read the faq. They will not get mad since you attempted to do your homework - I asked many questions on things that I wasn't clear about in the faq and I got direct, simple answers because I did my homework to the best of my extent and knowledge at the time.

Type in paragraphs, use punctuation, spell properly, do your homework and you will find that everything in life gets a LOT easier.

Nothing against you personally man, but DAMN you gotta do your research before you just slap some **** on a car and expect it to run perfectly, or even safely at that.

EDIT: I just read your post about the guy before you. Guess what, if he really did run it with no tuning, it didn't run fine. He's either lying or he doesn't consider a RRFMU to be tuning (Which I personally wouldn't).
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Old 08-30-2010, 01:16 AM   #16
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well then whhat would you guys reccomend short of running a emu like a megasquirt. i have 460cc injectors from an rx7 that i plan to put on after i get a fmu. what kinda fmu do you guys reccomend thats cheap but will get me to about 220whp safely? ive read a lot of posts and other **** people say that its not worth buying an fmu and just get a emu but i dont really want to go that far. just want to hit 220-230 whp and leave it pretty much
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Old 08-30-2010, 01:26 AM   #17
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Quote:
Originally Posted by miata94 View Post
well then whhat would you guys reccomend short of running a emu like a megasquirt. i have 460cc injectors from an rx7 that i plan to put on after i get a fmu. what kinda fmu do you guys reccomend thats cheap but will get me to about 220whp safely? ive read a lot of posts and other **** people say that its not worth buying an fmu and just get a emu but i dont really want to go that far. just want to hit 220-230 whp and leave it pretty much
for 220whp your looking at a standalone, running 12-14psi, the 460cc injecters would work, and a new clutch, and it sounds like you need to get your charge pipe ends rolled
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Old 08-30-2010, 01:28 AM   #18
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Quote:
Originally Posted by miata94 View Post
well then whhat would you guys reccomend short of running a emu like a megasquirt. i have 460cc injectors from an rx7 that i plan to put on after i get a fmu. what kinda fmu do you guys reccomend thats cheap but will get me to about 220whp safely? ive read a lot of posts and other **** people say that its not worth buying an fmu and just get a emu but i dont really want to go that far. just want to hit 220-230 whp and leave it pretty much
oh yeah, and, general rule.. you gotta pay if you wanna play.
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Old 08-30-2010, 01:32 AM   #19
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**** i couldnt just use a fuel pressure regulator that has a boost vacuum port like the one aem makes http://www.summitracing.com/parts/AVM-25-302BK/
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Old 08-30-2010, 01:40 AM   #20
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**** i couldnt just use a fuel pressure regulator that has a boost vacuum port like the one aem makes http://www.summitracing.com/parts/AVM-25-302BK/
not for what you want, i would only use that up to a max of 5 psi, hell, i wouldnt use it. im using a AEM F/IC piggyback right now for 8psi, the piggyback can work easily up to 15ish, you just have to find somebody who knows how to tune it. read the whole "all your answer in one big post".. post.. it really has a LOT of answer. so please, before you post again, read THOUROUGHLY through it, and if you happen to have a unanswered questions, make sure it isnt in there, then ask
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