Anyone running low boost
#1
Anyone running low boost
This may seem like a dumb question to you guys, buttt are turbos running stock wastegates supposed to boost to a certain point (from 3k to 4k for me) and then just stop accelerating? It feels as though when it reaches that point the car is being held back and accelerates less than a naturally aspirated miata would at 5k RPM. I do have a manual boost controller installed but turned down (I'm still trying to run through all my 87 octane and not trying to blow up my car 40 miles from home). I have only just installed my first turbo, so I don't quite know what a low psi turbo'ed car is supposed to feel like, but my friend's evo seems to accelerate all the way to redline. I know thats a big difference but thats how I assumed all turbos would feel.
Because there is a constant increased pressure when the turbo has reached its peak, there shouldn't be any decrease in acceleration, only a stop in increase in acceleration, right? The only way I'm thinking this is possible is if my fuel is maxed out, or if there is a leak in my intercooler piping that somehow gets worse at higher RPMs and fixes itself at low RPMs. I am still running stock injectors and fuel pump but stock wg psi. If thats just how turbos somehow work or if anyone has any ideas, please enlighten me. Thanks in advance.
Because there is a constant increased pressure when the turbo has reached its peak, there shouldn't be any decrease in acceleration, only a stop in increase in acceleration, right? The only way I'm thinking this is possible is if my fuel is maxed out, or if there is a leak in my intercooler piping that somehow gets worse at higher RPMs and fixes itself at low RPMs. I am still running stock injectors and fuel pump but stock wg psi. If thats just how turbos somehow work or if anyone has any ideas, please enlighten me. Thanks in advance.
#7
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so it is running great except that at 5k rpm it feels like it just hits a wall?
A few questions:
1. What modifications have you made to your fuel system? From what it sounds like, you have not made any changes at all. That is no bueno.
2. What modifications have you made to your ignition system?
From what I can tell, if you have stock fuel system and no rising rate FPR installed, then you are running out of fuel up there and bogging from being too lean. Dangerous situation, motor could get fucked up doing that.
A few questions:
1. What modifications have you made to your fuel system? From what it sounds like, you have not made any changes at all. That is no bueno.
2. What modifications have you made to your ignition system?
From what I can tell, if you have stock fuel system and no rising rate FPR installed, then you are running out of fuel up there and bogging from being too lean. Dangerous situation, motor could get fucked up doing that.
#8
Jesus dude, most people are at least a little cautious about diving right in to the boost, not you apparently. No boost gauge, no wideband?
Part numbers won't help, no one can tell you what psi you're running based on that. Get some gauges so we at least have something to go on. In the meanwhile, get that crap gas out of the tank, check for exhaust leaks and boost leaks, and make sure your fluids are new and that your other maintenance (such as fuel filter) is up to date. I'm guessing (hoping) you've undone the timing bump in your sig?
Part numbers won't help, no one can tell you what psi you're running based on that. Get some gauges so we at least have something to go on. In the meanwhile, get that crap gas out of the tank, check for exhaust leaks and boost leaks, and make sure your fluids are new and that your other maintenance (such as fuel filter) is up to date. I'm guessing (hoping) you've undone the timing bump in your sig?
#9
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Ok dude, you are on track to ******* up your car seriously with that sort of lax attitude toward the whole thing. Answer the questions i posted above please and we can go from there. Don't drive it in boost anymore until we figure it out.
#12
so it is running great except that at 5k rpm it feels like it just hits a wall?
few questions:
1. What modifications have you made to your fuel system? From what it sounds like, you have not made any changes at all. That is no bueno.
2. What modifications have you made to your ignition system?
yes, that's the feeling exactly. Sorry, I have a 12:1 vortech FPR. I have NGK blue wires and iridiums.
I have, of course, retarded it to 8. If I've been 87 octane and not knocking with my timing for the past 45 miles, I should be getting away with it. The gauges are currently being shipped to my house. I have replaced all fluids and checked for leaks, 5k miles on the fuel filter. I was a ridiculous and outrageously reckless for having driven the car right when I got it running, but I'm sure you all know the feeling. I do however, know how to maintain my car correctly and have adequate skills and experience, despite my age. not trying to brag, just trying to provide a little more background information
Thanks to everyone for the warnings though
few questions:
1. What modifications have you made to your fuel system? From what it sounds like, you have not made any changes at all. That is no bueno.
2. What modifications have you made to your ignition system?
yes, that's the feeling exactly. Sorry, I have a 12:1 vortech FPR. I have NGK blue wires and iridiums.
I have, of course, retarded it to 8. If I've been 87 octane and not knocking with my timing for the past 45 miles, I should be getting away with it. The gauges are currently being shipped to my house. I have replaced all fluids and checked for leaks, 5k miles on the fuel filter. I was a ridiculous and outrageously reckless for having driven the car right when I got it running, but I'm sure you all know the feeling. I do however, know how to maintain my car correctly and have adequate skills and experience, despite my age. not trying to brag, just trying to provide a little more background information
Thanks to everyone for the warnings though
#14
Most people on stock injectors retard to 6*, run whatever premium is in their area, and have a boost gauge at minimum so they at least know if they're on target or not. It seems like you need to learn to be more patient. No one mentioned anything about your age, but frankly I'm not shocked. Just calm down, keep out of boost for awhile, and no one's engine gets hurt.
#16
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You don't have so much as a boost gauge and you want us to diagnose why your car is falling flat on its face? You must be joking. Get a wideband and a boost gauge and spend some time reading the Useful Posts section here, and you'll learn enough to diagnose your own car.
#17
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Phone conversation:
"Doctor I have a terrible headache! What is wrong with me?"
"Are you running a fever? Did you hit your head? What's your blood pressure? Are you taking any medications? Do you have any other symptoms?"
"I can't tell you any of that, Doc, but you've got to help me."
No gauges, no answers, too many questions, no way to know.
Park it until you equip it with proper diagnostic tools. Wideband o2 sensor is a minimum requirement for a DIY.
And FYI - you typically won't hear knock with the top down.
It will already be too late when you figure out that you've had it.
"Doctor I have a terrible headache! What is wrong with me?"
"Are you running a fever? Did you hit your head? What's your blood pressure? Are you taking any medications? Do you have any other symptoms?"
"I can't tell you any of that, Doc, but you've got to help me."
No gauges, no answers, too many questions, no way to know.
Park it until you equip it with proper diagnostic tools. Wideband o2 sensor is a minimum requirement for a DIY.
And FYI - you typically won't hear knock with the top down.
It will already be too late when you figure out that you've had it.
#19
You really should get some kind of engine management. You're being a little over confident in your skills and in the end it's going to trash your motor. Either your ballsy as **** or just ignorant when it comes to this stuff. You really shouldn't have even installed the turbo until you've read all the essential information. Wait for your gauges before you mess with it anymore.