Max safe boost? [Merged 10-6]

[Turbolaser]

Is it safe to do the boost contol solenoid mod on a stock 1G?

 

[91stocker]

If you have a wide band and Jackal then you need to log it to see whats safe to run. It could be fine now but you need to check and see if your getting knock, your afr etc..

This^^^

If your boost creeping to 20psi. Whats your afr's look like? What kr are you seeing?

Post up a log if you can.

 

[bryanwheat]

What spring is in the external wastegate. Try to run the boost source line directly to the wastegate and leave the boost controller out and see what it does.

 

[jrs187]

No mbc got vac hose coming off ic pipe. Not sure what's going on with jackal log. The disc for program to run the logging thing won't work with windows 7 it says. So I need to find a laptop with xp or something.

I have a 8 psi spring. Its at -15 vac. I'll see if I can get something rigged up to work for logging. I'm starting to think I should of kept my mustang. Lol that's sad

 

[91stocker]

No mbc got vac hose coming off ic pipe. Not sure what's going on with jackal log. The disc for program to run the logging thing won't work with windows 7 it says. So I need to find a laptop with xp or something.

Thats odd, Jackal has no problems running on 7. Maybe go back to the site and download direct.

DS-MAP - Index

I also wouldnt run the car anymore until you at least get the logger on there to see whats going on. Your wb still has a gauge right? Whats that reading?

I have a 8 psi spring. Its at -15 vac. I'll see if I can get something rigged up to work for logging. I'm starting to think I should of kept my mustang. Lol that's sad

You might be just fine if its tuned for the 20psi spikes. Re-download Jackal and post a log.

If its not tuned for it, or you dont have the injector for it, there are several different fixes for the boost creep that are all fairly easy.

Dont sweat it man, just take your time with it.


And i wish this thread wasnt merged. cough*mods*cough

 

[jrs187]

The car is now parked due to cheap parts. My ss braided line got a hole in it from my header. Actually no the wb does not have a gauge.

I figured it was a newbie question so it fit best in that section my bad.

Jackal isnt the one having issues with windows 7 its the keyspan adapter so i can log, or does jackal log right from the ostrich now? Maybe i need to go back and read some more on there been awhile.

thanks for your help guys.

 

[1990_talon]

Exactly what the title say. I know what im running is probably way to much but i have no way to turn my boost down. Im running 24 psi. Stock motor from what the previous owner said, big 16g turbo, gm maf, maf translator, fmic, greddy rs bov, innovative wideband, boost, a/f ratio and oil pressure guages. Basically how much boost is safe with my setup.

 

[91stocker]

Are you atleast logging while running that much boost? Im surprised your motor is alive right now. 24psi on a 16g on stock injectors??? That has to be crazy lean. What does your afr's read at wot?

 

[awddarrell]

1st, this question has been posted, many times before. there should be some type of Manual Boost Controller, it your boost level is at 24psi. Might wanna check that out.
Maybe take some pic's of your engine bay (detailed pic's), also of any modifications that look more than stock. I bet there is a manual boost controler on there.
2nd, what is your WB reading at idle and while you are in boost.
my next suggestion is do some researching, use the search button, and read some threads that sound like they are close to info you are looking for.
my 16g on WG preassure was only hitting 16psi, 24 is way high without a MBC.

 

[1990_talon]

Are you atleast logging while running that much boost? Im surprised your motor is alive right now. 24psi on a 16g on stock injectors??? That has to be crazy lean. What does your afr's read at wot?

Im not sure. I havent driven it in a few weeks. It runs great. No abnormal noises coming from the engine nothing. And im only 15 so i dont know what logging means. Please explain.

 

[snowborder714]

Have you tried connecting the wastegate directly to the vacuum source (no boost controller in line)? This should get you down to a much more reasonable boost level.

It might run great from your outside perspective, but if you looked at the values the ECU is seeing in regards to your AFR, injector duty cycles, etc., you'd see is extremely dangerous and not ideal by any means. A logger is an external device that will show you those values so you can monitor what your car is doing.

What is your wideband reading during a 3rd gear WOT pull? Probably not where it should be is my guess.

 

[1990_talon]

1st, this question has been posted, many times before. there should be some type of Manual Boost Controller, it your boost level is at 24psi. Might wanna check that out.
Maybe take some pic's of your engine bay (detailed pic's), also of any modifications that look more than stock. I bet there is a manual boost controler on there.
2nd, what is your WB reading at idle and while you are in boost.
my next suggestion is do some researching, use the search button, and read some threads that sound like they are close to info you are looking for.
my 16g on WG preassure was only hitting 16psi, 24 is way high without a MBC.

There is one but it doesnt seem to work. Ive turned it all the way in and out and no changes. Theres no slits in the hoses holes nothing. I will take pictures of everything here shortly. Im in the process of removing my power steering belt cause i dont have any ps. I think there is a hole in one of the lines. But im not to worried about it.

Have you tried connecting the wastegate directly to the vacuum source (no boost controller in line)? This should get you down to a much more reasonable boost level.

It might run great from your outside perspective, but if you looked at the values the ECU is seeing in regards to your AFR, injector duty cycles, etc., you'd see is extremely dangerous and not ideal by any means. A logger is an external device that will show you those values so you can monitor what your car is doing.

What is your wideband reading during a 3rd gear WOT pull? Probably not where it should be is my guess.

Like i said above i havent driven it in a few weeks so i dont know. But I will try what you mentioned.

 

[Boosted DSM 32]

Maybe your boost gauge is wrong or something 24psi on an evo III 16g would be putting down enough power to go 12s on theres no way those injectors could fuel that if i were you id go to a junk yard and get a stock boost control solenoid if i were you and keep it at a safe level i did a pull with mine on 15psi and i felt it start to lean out way to much i couldnt imagine 24psi

 

[mantega4g63]

12psi is safe to run on stock injectors

are you boost creeping?
is it solid 24psi all the way to redline from the time boost is built?

 

[1990_talon]

12psi is safe to run on stock injectors

are you boost creeping?
is it solid 24psi all the way to redline from the time boost is built?

Nope. And no it works its way up to 24. But i never hit fuel cut which i dont understand.

Maybe your boost gauge is wrong or something 24psi on an evo III 16g would be putting down enough power to go 12s on theres no way those injectors could fuel that if i were you id go to a junk yard and get a stock boost control solenoid if i were you and keep it at a safe level i did a pull with mine on 15psi and i felt it start to lean out way to much i couldnt imagine 24psi

It could be wrong. Idk. But its not an evo III. its just a big 16g.

 

[Abe'sGST]

Like already said, remove your MBC and hook up a line from the wastegate nipple directly to your vacuum source.

 

[c2ypt1c]

There is one but it doesnt seem to work. Ive turned it all the way in and out and no changes. Theres no slits in the hoses holes nothing.

Sounds like a bad wastegate actuator...

remove your MBC and hook up a line from the wastegate nipple directly to your vacuum source.

+1 this will tell you if your actuator is bad.

 

[1990_talon]

Like already said, remove your MBC and hook up a line from the wastegate nipple directly to your vacuum source.

I did that. No difference.

 

[snowborder714]

Does your wastegate actually move when you put air into it? Is it possibly sticking on something?

 

[c2ypt1c]

I did that. No difference.

Bad actuator...get a new one

 

[1990_talon]

The hose thats on the boost controller goes to the j pipe on the turbo then the one that is off goes to the wg. I dont know which knob to turn. i turned the tanish one and nothing. I dont know if i shound turn the bolt or what.

 

[crash89]

When I had my car dyno'd I did a log.. I was on my 20g with an upgraded pump and cams, fmic and exhaust.. 14 psi on stock injectors made me 297 wheel hp.. My injector duty cycle (IDC) were 120+ by redline, safely should be more like 80-85.. Once I saw that I told the guys Im not doing another run... 24 psi on stock injectors is freaking me out.. Definitely need to do something before you decide to get heavy into boost again.

 

[snowborder714]

Just remove the MBC completely. It looks like a piece of junk. Run the single line to the gate from the source and be done with that for now. If (as you stated earlier) you already tried this and it didn't change a thing, then you need to look at the wastegate to see if it works properly or needs to be replaced with one that does.

You also need to recirculate your bov.

 

[1990_talon]

Just remove the MBC completely. It looks like a piece of junk. Run the single line to the gate from the source and be done with that for now. If (as you stated earlier) you already tried this and it didn't change a thing, then you need to look at the wastegate to see if it works properly or needs to be replaced with one that does.

You also need to recirculate your bov.

I know i need to recirc it, but i dont have the fitting to do so. But thanks for the help. Would buying a cheap ebay MBC be worth it? Ive seen ones for like $10.

When I had my car dyno'd I did a log.. I was on my 20g with an upgraded pump and cams, fmic and exhaust.. 14 psi on stock injectors made me 297 wheel hp.. My injector duty cycle (IDC) were 120+ by redline, safely should be more like 80-85.. Once I saw that I told the guys Im not doing another run... 24 psi on stock injectors is freaking me out.. Definitely need to do something before you decide to get heavy into boost again.

Alright thanks. So somehow i need to turn my boost down.

 

[snowborder714]

Would buying a cheap ebay MBC be worth it? Ive seen ones for like $10.

Nope.

The only one I'd recommend is the Hallman. There may be other decent ones out there, but this brand is the that always pops up as the tried and true. I've got one and it works great.

 

[JusMX141]

Move that GM MAS from your intake pipe to the coupler right after the BOV there and you'll be able to vent the BOV all you want.

I'd also look into doing something about that lower intercooler pipe / j-pipe setup you have there. That's just asking for boost leaks not to mention the excessive heat it's seeing by wrapping around the engine bay for no reason.