Max safe boost? [Merged 10-6]

[Turbolaser]

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

 

[SVT2DSM]

Forged bottom end
New oem valves
Hks 272 cam
BC dual valve springs
Cometic hg

That's the most boost I can push on a 16g/18g/ 20g safely without dsmlink? Or any engine management

 

[JOSHDIZLE]

You are going to be limited by your fuel system. Do you have stock injectors and fuel pump?


So to answer your question, stock boost until you upgrade your fuel system.

 

[Colt4G63 also]

You can probably get away with 12 psi.

 

[mchustle]

Enough to be a waste on a fully built motor. Get something to tune and upgrade your fuel system and make some real power.

 

[SVT2DSM]

My bad I forgot to mention I have a 255 walboro fuel pump and 560cc injectors with a 14b right now. I'm wanting to get a 16g and some injectors around 650-850cc. And ECM link but I just dumped like 4 grand into my car and I'm moving so I can't afford a engine management system as of now but it is on my to do list. I just wanna know what I can push and not waste effort/destroy my engine in the mean time

Cause right now I'm runnin 20lbs on a 14b....ITS NOT ENOUGH! Hahaha

 

[donniekak]

A stock block, and the rest of your cash on turbo, and fuel mods would have been a better way to get where you want to be with your budget.

 

[Mischif]

Cause right now I'm runnin 20lbs on a 14b....ITS NOT ENOUGH! Hahaha

Thats alot of boost to be running with a stock ecu and no way to tune. Granted you have 560's but still....do you at least have a wideband so you know what your a/f ratios are like?

 

[zachwilliams02]

I feel sorry for the 14b that is pushing 20psi on a daily basis

 

[mikevar94]

Hey guys I've only seen questions like this asking about raising boost with stock injectors WITH a fuel pump and/or tune...but I've got none of those so I was wondering is it safe? Current set up includes a 16g and my boost gauge reads 12psi, stock injectors, stock fuel pump, stock bov and no tune. I was told that I could maybe raise it to about 15psi safely but no more. Thoughts? I really do want injectors, a fuel pump and dsm link but can't afford them at the moment.

 

[Bud92gsx]

Rewire the fuel pump.Up the boost to 14/15.

 

[Araesk]

16G can build up to mid 20's in boost. As for is it safe? The answer is yes, but it will increase the wear on your turbo. As long as your car doesn't start to ride differently when you're at that boost you know it's fine. (I cannot think of the right terms for what it is when you're making too much boost.) You can get it up to about 14 PSI with the stock injectors and fuel pump, but anything after that you will need atleast an Walbro 190 and some 550cc injectors. Those would hold you over till about 20 PSI.

Edit: The stock BOV will also start to leak at about 15 PSI. So if you want to go big, replace that as well.

 

[Bud92gsx]

16G can build up to mid 20's in boost. As for is it safe? The answer is yes, but it will increase the wear on your turbo. As long as your car doesn't start to ride differently when you're at that boost you know it's fine. (I cannot think of the right terms for what it is when you're making too much boost.) You can get it up to about 14 PSI with the stock injectors and fuel pump, but anything after that you will need atleast an Walbro 190 and some 550cc injectors. Those would hold you over till about 20 PSI.

Edit: The stock BOV will also start to leak at about 15 PSI. So if you want to go big, replace that as well.

20 lbs on stock injectors is suicide.Just letting you know.

 

[TurboLaserRS]

It depends on the car. But to be honest this has been asked a million times on the forum and with a 14B I wouldn't run beyond 15PSI without supporting mods. I had a wastegate line failure that lead me to pushing about 19PSI for awhile and even though I didn't blow my motor I really wouldn't recommend trying it.
The 16G is going to flow even more CFM so you are going to end up on even less 'PSI' of boost to still be in the safe zone when compared to a 14B.

 

[mikevar94]

Okay I think I'll maybe bring it up to 14 max if I do raise it. Will 2 more pounds be a noticeable difference as far as power? And what does bud92 mean by rewiring the fuel pump?

 

[Bud92gsx]

Okay I think I'll maybe bring it up to 14 max if I do raise it. Will 2 more pounds be a noticeable difference as far as power? And what does bud92 mean by rewiring the fuel pump?

A rewire of the fuel pump means the fuel pump has as much voltage as possible..Allowing for a few more lbs of boost.And a rewire and the t25 can make about 225/250 hp..Obviously a 14b or 16g your looking more at the 250 number.

On a 1g a rewire is as simple as running an old power wire from an amp to the back of the car.You ground the pump through the relay to the chassis.And your set.

Its pretty simple wiring work.

 

[NHerron]

Eclipse Fuel Pump Tech Tips

 

[TSicktalon]

The best way to tell if your fuel system can support XX lbs of boost is a wideband air/fuel gauge.

Then there is no need to ask.

 

[deylag]

I would say the cheapest way to get better performance out of the car without making any engine modifications would be to use better tires.

 

[iBoostDSM]

I wouldn't trust anything over what it already is, like bud92 said rewire your fp and turn it up to 14. You will notice a difference after turning it up too.

You should consider investing in a wideband soon too.

 

[mikevar94]

I may just wait till I tune it. If I get dsmlink will that be able to tell me what a wide band would tell me?

 

[cherrymane]

absolutly not bro you need a wideband to see where your at and your gonna hit fuel cut anything over 12 pounds unless its a knock off turbo. and maybe 14 tops. i did the same thing and when you get on it hard it will break up and that over and over will lead to broken parts. do not do it! upgrade your pump and get another 2 pounds maybe but those injectors are not very good after 12-14 its gonna max them out and the car is gonna pop and break up and run like sh**t

 

[jof_03]

## stock 1gbov is fine upt0 about 18lbd boost, some even more, i have an uncrushed 1g that holds 20psi boosta all day, crushed you will squeeze more out of it or do the bov mod

 

[LandSpeed-DSM]

I may just wait till I tune it. If I get dsmlink will that be able to tell me what a wide band would tell me?

You will need both, and then you will have to wire the Wideband to an input so it can be logged.

There is a lot of silliness, half truths and BS in here.. Bud is right though, rewire the pump and leave boost where it is till you know what your fuel situation looks like.

 

[mikevar94]

Will do. How about the stock side mount intercooler? How much boost can the handle?

 

[iBoostDSM]

FMIC should be next on your list after fuel pump, dsmlink and wideband. It will probably start to heat soak after a few back to back runs at 15psi+ on a 16g.

And like Landspeed said you will need a wideband AND dsmlink, then the wideband can be set up to be logged in link.

IMO I would keep the boost set at 12psi until you get all the above parts and maybe a set of larger injectors. Then turn it up to 18-19psi and you will feel a huge difference. I think the larger jumps are more fun then just going up little by little after each mod

I've heard at 20psi headstuds will have to be replaced. Anything over that and the stockers can't handle it for very long. So make sure that's on your list too. I've always replaced those sooner rather than later just to make sure nothing bad happens.