You can turn the boost up but your gonna need injectors to run the 16g without hitting fuel cut and you'll need some kind of tuning device safc, dsmlink ect. also do a boost leak test then go from there.
But you cant just turn the boost up that can cause you to lean your car out. As for the oil leak you need to fix that its not common for our cars to have that.

Well how does your car "feel"? Does it sputter/anything abnormal? Did all the maintenance? 8psi is pretty low, you can turn up the boost if you have a boost controller and a aftermarket gauge, stay at 12psi jst to be safe.

Well guy told me it will do fuel cut when boost is at 17lbs over
And the car pulls good, doesn't sputter or anything like that. It does have a boost controller and an autometer boost gauge.
So big 16g is useless? should i get a stock one?

And when it started at first the engine was shaking and the guy had to give it gas then after it stayed on. and at stops it idles like at 1100 rpm.

I ran the same mods with 10 psi and no tune and was fine if you wanna run more boost than that you will need bigger injectors and a safc. safc is only good for up to 650cc and that will be more than enough for the 16g

JuGs said:

I ran the same mods with 10 psi and no tune and was fine if you wanna run more boost than that you will need bigger injectors and a safc. safc is only good for up to 650cc and that will be more than enough for the 16g

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What rpm does your turbo spool to?

JuGs said:

I ran the same mods with 10 psi and no tune and was fine if you wanna run more boost than that you will need bigger injectors and a safc. safc is only good for up to 650cc and that will be more than enough for the 16g

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Wrong, COMPLETELY wrong.

With the mods you have all you need is walbro 155 fuel pump. Any bigger and you WILL need a tune. (I would downgrade your 255 if you don't want to do tuning) You don't need injectors with this either.

With just the fuel pump and the 16g, you can run up to 20lbs of boost (not safe) but possible WITHOUT a tune. Hell, I ran 16lbs on my STOCK fuel pump and my stock turbo.

oneslowwdsm said:

Wrong, COMPLETELY wrong.

With the mods you have all you need is walbro 155 fuel pump. Any bigger and you WILL need a tune. (I would downgrade your 255 if you don't want to do tuning) You don't need injectors with this either.

With just the fuel pump and the 16g, you can run up to 20lbs of boost (not safe) but possible WITHOUT a tune. Hell, I ran 16lbs on my STOCK fuel pump and my stock turbo.

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I dont get what your saying at all. When you raise the boost you will need to tune to be safe. Doesn't matter what kinda fuel pump you get as long as that pump can handle the boost you set it at. Since he already have a 255 pump, he will need an AFPR to keed the pump in check, he doesnt really need a tune if he doesnt up the boost.

Jesus christ you people amaze me. Dsme36, your car is slow because you're only boosting 8psi. That's even lower than stock levels of 12-14. You need to call the guy you bought it from and find out what he has in there for injectors, stock or upgraded. It would make sense that he upgraded them as well considering all the other upgrades. You can fix the oil return leak with new gaskets, they're a couple dollars from any vendor. For now, turn your boost up to 14lbs and double check the injector size with the previous owner. You probably have 450cc's due to your car being manual which would be good to about 16lbs, 750's would be a good upgrade to fully use that big 16g. Do you have an afpr? You should with the 255 pump.


Jugs is completely wrong as oneslow pointed out. 16lbs is about the limit of boost on 450's. 10lbs isn't even at stock levels.

innocenttalon said:

I dont get what your saying at all. When you raise the boost you will need to tune to be safe. Doesn't matter what kinda fuel pump you get as long as that pump can handle the boost you set it at. Since he already have a 255 pump, he will need an AFPR to keed the pump in check, he doesnt really need a tune if he doesnt up the boost.

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My point was with a 155 you wouldn't need SAFC or an AFPR even though I would recommend an AFPR. You would not actually need to tune the car, it would run on factory settings so you wouldn't be going too lean or to rich and you wouldn't need to regulate it.

My friend had a rewired stock fuel pump, 16g, and had an evo BOV and he ran 18 pounds all day with no problems. Once you go bigger, like a 20g with bigger supporting mods THEN you will need tuning.

So lets say i turn it up to 14lbs. im good right? no tuning no other crap required? and no i dont have an afpr. Dang turbo cars are confusing .

I noticed an hks turbo timer by my steering wheel? wth is that for? and theres this box with numbers changing all the time.

DSMe36 said:

So lets say i turn it up to 14lbs. im good right? no tuning no other crap required? and no i dont have an afpr. Dang turbo cars are confusing .

I noticed an hks turbo timer by my steering wheel? wth is that for? and theres this box with numbers changing all the time.

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A turbo timer is a device you use to let your turbo cool down. When you take the keys out of the ignition it will keep your car running for a certain time at idle to let your turbo cool down.

You will need tuning with that fuel pump as I stated. If you don't know what you're doing, I'd take it to either someone who knows about this stuff or a performance shop so they can tune it. He probably had it set at 8lbs for a reason. (so you wont go to rich or to lean once in higher boost)

He didn't mention to you that it might need a tune? If it would be tuned already, it'd be set at a higher boost for sure.

the turbo timer is for the health of your turbo -- if you drive the car hard and then just shut it off -- the turbo will "coke" or cook the oil in it and it will significantly decrease the life of the turbo -- a turbo timer is a unit that keeps the car on when you turn it off -- you can set it to a set amount of time

what the this does is allow the turbo return to normal exhaust temps at idol -- its a nice insurance package for your 16g turbo

oneslowwdsm said:

A turbo timer is a device you use to let your turbo cool down. When you take the keys out of the ignition it will keep your car running for a certain time at idle to let your turbo cool down.

You will need tuning with that fuel pump as I stated. If you don't know what you're doing, I'd take it to either someone who knows about this stuff or a performance shop so they can tune it. He probably had it set at 8lbs for a reason. (so you wont go to rich or to lean once in higher boost)

He didn't mention to you that it might need a tune? If it would be tuned already, it'd be set at a higher boost for sure.

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Mine is not set im guessing ### it offs when i take the key out.

that foo not returning my calls so ill ask him later. i had a friend that knew a lot.
and ill probably do a tune. where do i do that?

DSMe36 said:

Mine is not set im guessing ### it offs when i take the key out.

that foo not returning my calls so ill ask him later. i had a friend that knew a lot.
and ill probably do a tune. where do i do that?

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I don't know do some research around your area. I'm sure there is a cali forum for DSM's and I'm sure there's performance shops around your area also.

I'd actually TRY to set the boost higher and see how the car acts. If you see a bunch of black smoke behind you when stepping on it, or if you experience fuel cutting while stepping on it, then you need a tune. (fuel cut is when your pump is not giving your engine enough fuel and it just cuts so it's going to feel like you hit a brick wall ) It's not fun but that's how you know. Be careful though because doing this can cause stuff to go wrong.

u have 99 ecu i can flash this unit when u find bigger injectors

i turned the boost up.
floored it, boost gauge read 16lbs.
then i guess fuel cut happened. rpms shot down.

but experienced power

so set it at 12 and runs no problem

and ill check out ladsm.com

well thanks for all the info

So at 12lbs it actually boosts and pulls all the way to 6k?

oneslowwdsm said:

So at 12lbs it actually boosts and pulls all the way to 6k?

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spools like at 5500 but idk.. seems to pull hard. way better than before i can tell u that though.

wait i dont get your question sorry

**im use to driving n/a so i dont really know much bout these turbo cars**

DSMe36 said:

and theres this box with numbers changing all the time.

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Exactly what numbers does this box show? If you are lucky it's a wideband!

starts spooling at 5,500? thats a little high for a 16g

brisvr4 said:

Exactly what numbers does this box show? If you are lucky it's a wideband!

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They're red digital numbers. What is this? Numbers just keep changing all the time

IgotBoost91 said:

starts spooling at 5,500? thats a little high for a 16g

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Wheres it supposed to spool at?

DSMe36 said:

spools like at 5500 but idk.. seems to pull hard. way better than before i can tell u that though.

wait i dont get your question sorry

**im use to driving n/a so i dont really know much bout these turbo cars**

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Like, let's say you have the pedal to the floor between 3.5k and 6-7k(whatever you shift at) RPM's. Does your boost gauge read 12lbs that whole time?

A 16g is supposed to spool around 3-4k and then start actually boosting. Anyone correct me if I'm wrong.

Also, the red digital numbers, what range of numbers are they usually in?