Max safe boost? [Merged 10-6]

[Turbolaser]

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

 

[97gstnick]

I have a 2g talon, with a big t-28 on it now. How much boost can i safely run?

Run all the boost you want if your not knocking. - thats what it ultimately comes down to. But if your on a stock fuel system, then your going to hit that limit very soon on low boost.

 

[JayRolla]

the t25 maxes out @ 16psi and I've heard the stock injector's duty cycles are reaching their limit. i think you'd hit fuel cut with a t28 since it flows more but there's only one way to find out!

yeah you really should get a logger to determine how much would be safe. In the mean time I'd stay around 12psi if I were you.

Man how many times do I have to say this. Fuel cut has nothing to do with the fuel system. Its just the name of what happens when the ECU cuts fuel do to the MAF being overrun by airflow. You can have the best and greatest fuel system in the world and still hit fuel cut.

 

[1fst2g]

Man how many times do I have to say this. Fuel cut has nothing to do with the fuel system. Its just the name of what happens when the ECU cuts fuel do to the MAF being overrun by airflow. You can have the best and greatest fuel system in the world and still hit fuel cut.

ok I was referring to knock and the duty cycles of his injectors. I still think he'll hit fuel cut though...

EDIT: alright, maybe it won't now that i've given it further thought.

 

[Dsmj89]

Assuming you're n stock fuel system, i would say keep it at 16 psi max.
I'm running 14 psi on my evo3 16g and the car runs great, you should hold 16 perfectly fine.
Anything over 16 and you're just going to start blowing hot air.

 

[1fst2g]

Assuming you're n stock fuel system, i would say keep it at 16 psi max.
I'm running 14 psi on my evo3 16g and the car runs great, you should hold 16 perfectly fine.
Anything over 16 and you're just going to start blowing hot air.

So, if you run a t28 with the proper fuel mods over 16psi you'll be blowing nothing but hot air? This is true for a t25, however, the t28 is more efficient. The problem is knocking. the only way for him to determine what a safe boost level to run is with a logger. Also, saying that your car runs great is merely speculation (unless you yourself have seen the logs).

 

[the_mork]

I would suggest that the problem is not knocking but running out of IPW. Log your car and turn up the boost a little at a time until you hit about 80-85% IDC. Until then don't bother to up the boost past about 15psi. Any more than that and you're just asking for trouble. Keep in mind that it doesn't matter what setup you have you will NEVER be fast without a logger.

 

[stealth13]

I have a walbro 190 fuel pump, 3 inch tbe, intake, bov, hard intercooler pipes, upgraded intercooler. The lowest I can set the boost at is 15 psi with my manual boost controller.

 

[1fst2g]

The lowest I can set the boost at is 15 psi with my manual boost controller.

I'm assuming this is because of your WGA not really your MBC. I guess you have no choice then...

you should check out evoscan if you're interested in datalogging

 

[97gstnick]

I have a walbro 190 fuel pump, 3 inch tbe, intake, bov, hard intercooler pipes, upgraded intercooler. The lowest I can set the boost at is 15 psi with my manual boost controller.

Try running straight vacuum line then.

 

[dsmtun3r98gst]

153155 PSI jk

 

[1fst2g]

153155 PSI jk

cool an orange county dsm'er!!!!! too bad i didnt get the joke

 

[TastyTalon]

Ha ha. Every setup is different but follow the advice on this thread, its good. Make sure you are safe with how much boost you run so you don't blew stuff up. I'd stick at 16 psi max, that will pull good for sure.

 

[b8180]

I have a 2g talon, with a big t-28 on it now. How much boost can i safely run?

I have an FP big T-28 and have been running 15 psi on a completely stock fuel system with no problems, but that is just my car; although I hear a lot of similar results from other DSMers.

 

[bnr32_coupe]

16psi with the stock fuel rail
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[1fst2g]

16psi with the stock fuel rail
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.....wrong

 

[rush2252]

This is another bench racing thread. Seriously there is no MAGICAL number. You need to do some homework before you go fast.

 

[srpjosh]

Obviosuly like everyone else said, it depends on your setup, miles, etc, to determine a safe boost for your specific application. I am running 21lbs on my T-28 and it's safe for my personal setup, miles, etc.

 

[habitatguy187]

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[dsmtun3r98gst]

cool an orange county dsm'er!!!!! too bad i didnt get the joke

yup orange county, i have quite a few friends with dsms around here

 

[rush2252]

My best explanation is find the "sweet spot" the bread and butter or whatever you call it, BUT its the spot at which the car performs the best and still gets good MPGs. I have a small 16g I can run 17-18psi no problem BUT the car gets about 14MPG and doesnt pull as good or run as good as it does set to 14PSI. Your going to have to learn to read a logger and tweak things until you find what works for you. Just because you put on a bigger turbo doesnt mean your going to go fast.

 

[Fabian]

VFAQ Site - Visual Frequently Answered Questions

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make this your bible dude.

 

[stealth13]

it doesn't pull that well at all at 16psi compared to my t-25 at 17

 

[habitatguy187]

Good, then sell it to me for $50

 

[saechao04]

The biggest difference will be at the 20+ psi level. Also without a good tune there is minimal increase in performance.

 

[Bluefire16]

It all comes down to efficiency...larger turbos do better in higher boost. We should all no this....of course a big 16g will feel slower at 12psi then the t25 at 12psi. Take my small 16g for example, until i turned by boost up past 16psi on a a ported 16g it felt slower than my 14b at 17psi. Yes it is 1psi less but bigger and blowing way more air....on a 16g sweet spot is 18psi and up.... thats what i have gathered from others...