Max safe boost? [Merged 10-6]

[Turbolaser]

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

 

[Scott_S]

Fuel system an handle a MAX of 16 psi stock so I agree with DSMcarmaro also

 

[fourreGsixty3]

Your engine can handle more then the 14B can put out, but you should do what^^^those guys said, and have it properly tuned because with too high of a boost level on stock fuel system your fuel will cut out and on an unproperly tuned engine you could blow your engine on 5 psi. So make sure its tuned properly and you have the proper supporting modds. So to make a long story short I would set it around 11 or 12psi.

 

[kwkdsm]

I agree with DSMcamaro as well, if you go to high on your stock setup you will more then likely run into fuel cut.

 

[Jeremy8302]

Thanks for your suggestions. I am going to set the boost at 12 psi.

 

[GOT EVO]

as other's have said i wouldn't go over 14-15psi

 

[MrBoxx]

Thanks for your suggestions. I am going to set the boost at 12 psi.

Very admirable of you to take the safe route until you have the necessary parts to increase the boost. Much better than not caring about the car and running high boost just to say that you do, like I've seen some people do.

 

[fieromx3]

ok well my engine is stockexcept a 3'' ss turbo back its a 1992 and i found i was boosting 21 psi on a stock engine....so do i need to tune the engine and a fuel system upgrade to run that boost? what would i need to run that? i just got this car yesterday and i called the owner back and he said dont run it to 21 psi and i know why...

 

[DSMcamaro]

Do you have an aftermarket boost gauge? If not, I would recommend getting a boost gauge before you hook up your MBC. Did he say how the car was running 21psi before? Did he have a MBC and remove it? Some more information will be helpful.

 

[fieromx3]

ok i have a brand new autometer 30psi gauge i just installed the first day i got it. he had a MBC on it and had removed it before he gave me the car the car. i dont think he ran it at 21psi before as he told me i shouldnt. i have run the car there at 21psi and it pulled hard and didnt studder until almost 7000rpm and it didnt run out of breathe either. everything is stock like stock intercooler and maf and all except the 3'' turbo back. i dont know if it will hurt my engine so i have been keeping the boost as low as possible. i am picking up an egt gauge real soon to monitor things. also i thought the stock turbo is a 14B but this turbo says right on it TD05H?? also he said he ported the turbo manifold.

 

[DSMcamaro]

TDO5H is the number for a 14b. I would definetly not be running 21 psi if I were you.
Check this out
http://www.vfaq.net/DSM/mods/10faq.html
The whole VFAQ site is very informative and I would recommend going there to find more information.
And I just noticed that your not the starter of this thread, , you probably could of started your own thread, but thats no big deal. What kind of MBC do you have? Did you install it yet and/or did it come with instructions? In anycase, you should be able to run 13-15psi with everything stock, but if you wanna be completely safe you could run about 12 psi I suppose. If I were you, my next buy would be a data logger.

 

[glenneclipsegsx]

get a logger of some sort so you can watch your timing and then you'll know for sure

MMMMM no you wont know for sure. Only way to really know is to get a wideband. or have it dynoed and have them use a wideband.

 

[fieromx3]

srry i know im not the starter but he got his question answered and i had the same question so i thought it would have been worse to open another same exact thread. anyway i dont got a MBC but i will find a way to turn it down thx for the help

 

[DSMcamaro]

So whats controlling your boost right now? the stock BCS?

 

[TooFastTooG]

Dont even think about turning up the boost untill you have a boost gauge, dont reley on the stock gauge as its not an actual measure of boost.

Also, I have the t-25, mbc, 1st gen bov, dejon tool uicp, 2.5" exhaust ,and an aluminum intake pipe, and I run 15 psi. Have been for a while now with know problems. But like the others said, your fuel system wont hand anything over 15 psi,

 

[fieromx3]

well the WG is controlling boost the line is hooked on the waste gate to the discharge on the turbo. i have a brand new autometer boost gauge plus the stocker and both work just fine. i also found that in 1st and 2nd the boost is steady 15psi and 3,4,5 it spikes to 21 psi. so if i got like a fuel pump, injectors, afpr, and a 3'' maft, fmic would that work? for 20psi? or should i get an aid of safc or a stand alone? it was real fun at the boost btw i did read that link where it tells u how much boost u can run on a stock engine

 

[mrbrianf20]

ok ive read up on how much boost a stock 2g gsx can run. and ive also read how much boost is safe to run on certain set ups. right now im running about 12 psi and i was wondering what would be the best spot to up it to.
ive got a 98 gsx
full 3'' straight exhaust (no cat)
injen intake
big 16g
1g bov crushed

those are the main things ive got done besides suspension etc. what do you guys think sufficient boost is for that set up?

 

[JayRolla]

The t-25 on the 2g will start blowing hot air above 13psi. And without any fuel mods you cant support more than 13psi. Also remember no madder what mods you have without a datalogger to log knock while you up the boost, can cause major damage to your motor. You always need to tune when you up the boost.

 

[DSMark]

The t-25 on the 2g will start blowing hot air above 13psi. And without any fuel mods you cant support more than 13psi. Also remember no madder what mods you have without a datalogger to log knock while you up the boost, can cause major damage to your motor. You always need to tune when you up the boost.

He has a big 16g, not a t25. He is right though, there's no way to really know if your boosting safely without getting a logger.

 

[blcknspo0ln]

The t-25 on the 2g will start blowing hot air above 13psi. And without any fuel mods you cant support more than 13psi. Also remember no madder what mods you have without a datalogger to log knock while you up the boost, can cause major damage to your motor. You always need to tune when you up the boost.

Actually the t25 has proven to make HP even at 21 psi. Albeit, it was only 10 whp more, but it still makes power. It is commonly accepted that the t25 is good up to about 16 - 17 psi without "blowing hot air".

mrbiran- Without any fuel mods, I would not raise your boost anymore than what it is at now. When I had my e316G, I ran 13 psi with stock fuel, 16 psi with a 190, and 20 psi with 660/190 + logger/SAFC.

The above two posters are correct, though. Raising boost may be fun, but to do it safely, one must raise boost at a small increment and log every run. This way you can reach your max boost at a safe limit.

 

[mrbrianf20]

sweet thanks guys, im not planning on touching my mbc untill i get dsmlink, wbo2, and egt and then a propper tune

 

[nightspeed87]

a 190lph hp, n/t fpr ( raises fuel pressure 10psi over stock) stock injectors
no safc or logging equipment yet, stock smic, 93 octane, larger tb elbow uicp and licp...
ported 14b, no cat, 3in muffler ( just for some specifics. so I could get a better answer.)

What seems like a safe boost to take it to for every day driving with that current setup
for when I get my 90s 6bolt rebuild engine going.

I was once told 16psi max before I start seeing knock with that set up, does that sound about right? Any opinions?

 

[GVR4592]

Get a logger. There is no other way to know.

 

[timloomis]

Youll need an afc or something for that n/t fpr.Im using it and my 450's are now 505's.I had to adjust my maft accordingly.How high you can go depends on a lot of things.My tsi is at 15 psi now,0 knock,and 67% duty cycle,so I have a lot to play with now.You NEED a logger though first of all.

 

[gotlag]

Agreed. There is just no 1 level. Every car will act differently, fuel form 1 pump is different than another, mechanical condition,etc. You have to see what is actually happening before you safely tune anything.

 

[nightspeed87]

yea il have a logger in like 2 to 3 weeks definitly, but I was just wondering. I wasnt going to raise boost until I did anyways, but my cars in the rebuild process and its not going anywhere for a month so yea... Just wondering how much you guys thought id be able to run with that set up... If I do raise it though i could always borrow my friends logger...
And timloomis you say I absolutely need a safc to run the n/t fpr...? ( Im also going to be on a hack mass to lean it out some.. and I remember somewhere saying that to run a fully hacked mass youd want at least 550ccs anyways so would that compensate? )
Without a safc would I run too rich or something on the n/t fpr?