Max safe boost? [Merged 10-6]

[Turbolaser]

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

 

[sax_man]

I run a ported s16g in my 2g with a fully stock fuel system and the sidemount. It's currently boosting to wastegate pressure. I was hitting fuel cut until I fixed my boost leaks. That was two years ago. Since then I've had zero problems.

 

[roadtrip_69]

Just wondering if anyone has a good estimate of what the factory spec headgasket can hold when it comes to boost?----

I believe its in my profile but I only have a Evo 3 16g running at 15-16 psi on 93 octane, with a front mount IC, until I get my new fuel injectors. (Also have ceddy mods/and ability to program the factory ECU to compensate for the new injectors once i do get them)Getting off topic though, just giving some back ground info. Anyways my engine only has about 5000 miles on it. It is just a rebuilt factory spec long block, I installed about 4 1/2 months ago(the original lasted 208000 miles).

I already have a pretty big oil leak i can't quite definitely trace down. I am about to drop it off at the shop who put the engine in tomorrow morning for them to look at it. (And just in case I'm returning the boost control system to factory, to eliminate obvious blame) Just curious what the stock head gasket can hold when it comes to boost? I know there are "upgrades" for the headgasket and bolts. But i figured being a BRAND NEW engine and bolts and headgasket it should last a while since I only have a 16g basically barely pushing. Am i wrong in this assumption? The engine is warrantied for 3 years, I just want to make sure they shouldn't be able to invalidate the warranty because I put more than "factory" boost into it? Should it be the headgasket or worse...Not sure where such an oil leak would come from. Though it was leaking from the oil pan and from around the oil cooler when i got the car back with 0000 on the engine. Though the oil pan is original..

Any input would be great. And yes i did search, but most of what i found was boost the engine it self can support. MAX HP and such.

Thanks

 

[viperlp01]

We run as much as a 16g will make(37psi tapers to about 25psi) on a stock head gasket and ARP head studs. If they will do the 96 dollar upgrade to ARP hardware then you should be fine.

 

[Crashdot]

In searches, I'm finding conflicting information regarding the stock boost for my car:

1999 Mitsubishi Eclipse GSX ~85,000
Mods: Greddy BOV, Profec B spec II boost controller, Autometer boost guage, Greddy hard piping, KN open air intake, front and rear strut bars.

Some say stock is 10psi and other say up to 14 psi.

I would like to know the stock boost that I can set the boost controller at for Lo setting, as well as the maximum boost for my car with stock injectors, turbo, etc can safely withstand. I will configure the Hi setting below that, but need a point of reference. I do have an aftermarket BOV so the stock BOV boost leak is not an issue.

Thanks

 

[1990dsmkid]

I believe the stock psi for a 2g is actually around 12psi and Id say I wouldnt go any higher than 14psi with everything being stock

 

[99ECLIPSEGSXDSM]

Stock is 12 psi and every car is different but 14-15 is ok to run

 

[WES_393]

There's no exact stock boost pressure. The stock BCS typically regulates boost anywhere from 9-12psi on the 2g. Maximum boost depends on many things and isn't the same between all cars. For more info on stock boost check out this thread:
http://www.dsmtuners.com/forums/newbie-forum/143197-max-safe-boost-merged-10-6-a.html

But my advice: Set the boost to 10-12psi and leave it there until you have a Wideband and some way to monitor knock. There is no safe way to raise boost without those two things. You wont get much out of the stock T25 turbo anyways.

 

[Crashdot]

I do have a pocket logger. Could this provide the necessary data needed to monitor knock?

 

[MN_Eclipze]

Are you still on stock boost? How much are you boosting right now? I am asking because you did not post anything telling how much you are boosting. I know you asked what is the stock max boost but if it was me I leave it as is until you have the proper MOD to up the boost.

 

[clipto]

Remove little nipple in the bcs, or 15psi on stock no real point boosting high stock. Also just go drop in walbro 255 and new fuel filter for saftey. Please people dont worry to much about an air fuel pressure regulator you will be fine. Time save up and grab a wideband.

 

[Crashdot]

Are you still on stock boost? How much are you boosting right now? I am asking because you did not post anything telling how much you are boosting. I know you asked what is the stock max boost but if it was me I leave it as is until you have the proper MOD to up the boost.

I did not install the boost controller or program it, but since it was not functioning properly, I tried to make some adjustments to troubleshoot. After determining that the problem was not related to lost settings, but a failed wiring harness going to the solonoid, and repairing this, I've been trying to understand the boost controller since some of the settings seemed questionable, such as the absence of a setting for the limiter, and the warning limit being set a 17psi which seems high. The guy that programmed this is no longer working at this shop.

From what I can tell, it was set to 10psi for lo mode, and 14psi for Hi mode. Right now I have lo at 10psi, but if stock is 12, I would like to raise it to 12. I didn't have any problems running Hi at 14psi, but want to confirm this is safe.

The Pocketlogger can monitor a number of parameters, but from what I understand in 2G knock is not one of the things that is reported via OBD. Timing should be something I can capture.

Thanks

 

[Tyler97GSX]

Just for reference. My 97 Gsx is bone stock with a 3" cat back exhaust. I had an AEM digital boost gauge and it would briefly spike to 13psi but for the most part it was at 12. I think maybe once it read 14. Died off to about 7-8 at redline. I am also at 4500 ft of elevation.

 

[Selling4G63TParts]

I blew up my t25 turbo using a profec B spec II, hard pipe kit, greddy type r BOV and cat back exhaust. It was set to 14 PSI all day because I listened to someone that said I could run that. 14 psi is the limit of that turbo but it will not run it all day everyday. If you want to keep your turbo I would run it closer to 10 psi. If you want to push it up to 14 to race or for shits and giggles that is on you. If you have a 14b its a little better but with the t25 you'll just cook it till the compression ring gets sucked into it at WOT and it will destroy the hot side turbine when the compression ring hits it.

 

[918johnson]

OK I have 1990 automatic awd tsi but I've got the 14b or 14g turbo on it but still has the 390cc injectors how much boost can I push with this injectors?

 

[Archer Fabrications]

15psi run the wastegate line directly to a vaccum line and it should be 15ish stock boost is safe with stock injectors, especially ones apparently smaller then the 2g?

 

[Quadsportz]

14-15 psi. The automatics had smaller injectors

 

[918johnson]

Yea the automatics came out with 13b turbos and 390cc injectors but the turbos been changed out to a 14g

All so I orderd a mtx-l wide band for it but if I bought bigger injectors could I tune it with the wide band ?

 

[Kokomoguy30]

What do you have for fuel control? Yes with a wide band you can easily tune for bigger injectors. If you plan on using the 14b you will only need 450cc injectors. Which you can find on ebay cheap since they are the stock injectors on all other dsms.

 

[black91awdturbo]

Guys lots of bad info here. The 1G 450cc are ok for 15ish psi with stock pump granted there are no boost leaks the rest of the system is up to snuff. He is running the small 390cc injectors so with out a logger I would only push 11-12 psi.. Also to run the 450cc injectors and not go hog ass rich you will want to get your hands on the 5 speed ecu that is setup for the 450cc blue tops!

 

[918johnson]

I have a silver race 255 fuel pump and a aftermarket fuel pressure regulator just waiting for them to come in but would. The 5 speed ecu be the best way? Like would my eco to power button still Wrk ? Sorry I'm new to dsms

 

[black91awdturbo]

I have a silver race 255 fuel pump and a aftermarket fuel pressure regulator just waiting for them to come in but would. The 5 speed ecu be the best way? Like would my eco to power button still Wrk ? Sorry I'm new to dsms

Yes the power eco button will still function as normal. With out the 5 speed ecu you will be running rich due to the fact the ecu is sending fuel for the smaller 390cc injectors that you replaced for the larger 450cc's.

 

[clipto]

Really everyone should leave there boost stock until you get it tuned..

 

[Cdc1221]

Jeez people research!! The best way to tune is to get something to tune with. A wideband is only useful as a feedback tool to tune by. While you can get a m/t ecu and 450cc injectors, the cost is not worth the small gain. Best idea is to get the ecu socketed and run ecmlink. Read here ECMTuning, Inc..

 

[mchustle]

Yea the automatics came out with 13b turbos and 390cc injectors but the turbos been changed out to a 14g

All so I orderd a mtx-l wide band for it but if I bought bigger injectors could I tune it with the wide band ?

Just for clarification it's not a 13b nor 14g. 13b is a rotary motor and I have no idea wth a 14g is.
The 1g auto came with a 13G and the 1g manual came with a 14B.

 

[jmccreight]

yeah it's 13g not 13b.. i had also thought that until i learned that Mitsy 3000gt vr-4s have the 13gs stock and guys upgrade them to the 14bs