Stock Boost [Merged 5-7]

[Gs-tHaVoC]

hehe kinda dumb question but whats stock boost on my car? just wondering if its worth it to install a boost controller and gauge without bov thats all. thanx

 

[AdrenilineCrash]

i think stock you run like 8-10 so you should be right about right.

-mike

 

[myeclipseisnice]

each pound of boost is how much horses? stock that is, so lets say if im at 12 stock, i put it to 13 each pound gives me how much horses?

 

[GaRn]

its not exactly linear like that.. to say... 1 psi more boost from your stock might give you 10 hp... the next maybe 13 more.. then somewhere along the line you reach a point where your turbo loses efficiency, your intercooler lose efficiency, and then your power increase goes down with eash psi increase..

i wouldnt go any higher than 16 psi on your stock setup.. fuel work and you could go a tad higher.. intercooler is sort of a limit on that car..

 

[szewczyd]

May seem stupid, but what is the stock boost level on a 14b? T25?
How much is a good amount to drive at with a pretty much stock car?
I don't want to break anything, but want a little more speed and power.

 

[leet]

I believe the wastegate on a T25 will hold about 10PSI. At least mine did w/out the BCS or boost controller.. as for the 14B i have no idea.

 

[Dieselboy]

Stock boost level on a 1G 14B is 11.05psi. Safe ammount on stock fuel would be about 15psi (could go a lil' higher with 94 or trick fuel). I ran 17 safely, but I had a few supporting mods such as a turbo back exhaust and an EGT guage and Datalogger to keep track of knock.

 

[Slow95gsx]

I was wondering whats the most boost i can run through the stock 4g63 engine?....thanks

 

[nowayout]

all depends on turbo size. I ran 40+ and the motor didn't last too long !

 

[Slow95gsx]

that sucks!! what kind of turbo was you running? i want to get either a 16g or 20g because my stock turbo is out completely.

 

[Defiant]

Around 16 psi you need to start doing fuel work.

 

[RipperXX]

^---yep.

It not only depends on the turbo. It also consits on intake pipeing diamiters. Do not forget how small the stock pipeing is.

For expamle 20psi on stock pipeing may only be 16 psi on larger aftermarket pipes but give you much more prefoamance from the incressed flow.

It's flow that counts not pressure.

 

[Velo7825]

so what would be the max flow for a stock fuel system

 

[allwheelTSI]

Originally posted by Velo7825
so what would be the max flow for a stock fuel system

did you read the replies? it depends on what turbo you're running,like Defiant said,if you're running the stock T25,16lbs is about as far as you wanna go.

 

[twenty5psi]

im just throwing this out there but 127..

thats insane,40 lbs!!..it must have been a huge turbo..yeah,cant do much when fuel cut stops you dead in your tracks so youll need alot of upgrades to flow fuel better and some more to even out the air flow..

 

[Velo7825]

Allwheeltsi: i did read the thread, and what i meant was what is the max amount flow in say Hz on the maf or lbs of air per minute. and the only reason you want to limit yourself to 16 lbs with the t25 is because thats about all that turbo can flow. try hitting fuel cut with the t25, i blew my t25 by overboosting and never hit fuel cut.

So the questions again what is the max flow (air per minuite, hz on maf whatever) of the stock fuel system.

If im at 16 psi at 4000 rpm on a green turbo is that more or less flow then a 16g at 16 psi at 7000 rpm?

i never realized that the stock ecu can use intake manifold pressure to control fuel

nowayout: are you seriously saying that you ran 40+ psi on a stock 4G63? thats about 700- 900 hp. not to mention your stock intercooler piping would run and hide down the road at about 30psi. and of course fuel? did you run 300 octane gas ( i want some) .

this isn't a flame, you just didn't give enough information to actually be believable

 

[doug]

This SERIOUSLY needs to be in the General/Newbie forum...

 

[swskillers14]

i want to know how many pounds of boost the stock turbo is putting out if anyone knows please tell me. And i have one more question if i get a 16g turbo how many pounds of boost should i expext to be at when i get it. thanx for your help. Shawn

 

[bzzzt]

When i first installed my boost gauge it read 12 consistently (completely stock car)

 

[allwheelTSI]

the 16g will be at the same psi as the 14b. you could bolt up a T88 and it would still be the same,boost is not turbo specific. you can run any turbo at pretty much whatever boost you want with a boost controller.

 

[Dieselboy]

Originally posted by allwheelTSI
the 16g will be at the same psi as the 14b. you could bolt up a T88 and it would still be the same,boost is not turbo specific. you can run any turbo at pretty much whatever boost you want with a boost controller.

So your saying flow rates for all turbo's are the same? If what your saying was true, that would be the case. With any upgrade having to do with flowing more air (bigger turbo, FMIC, etc..) you will more than likely have to adjust your boost. I had to with my 16G and FMIC install on both occasions.

Just FYI, stock 1G boost is set at 11.05psi

 

[allwheelTSI]

Originally posted by Dieselboy


So your saying flow rates for all turbo's are the same? If what your saying was true, that would be the case. With any upgrade having to do with flowing more air (bigger turbo, FMIC, etc..) you will more than likely have to adjust your boost. I had to with my 16G and FMIC install on both occasions.

Just FYI, stock 1G boost is set at 11.05psi

no no no,of course flow rates for all turbo's are'nt the same,give me some credit here,huh? i'm not a complete moron. what i was telling him,is that bolting on a 16g is'nt going to up his boost,sure,it'll move more air,but on the stock BCS,without a boost controller the turbo will run the same boost as the 14b regardless of how big it is.

 

[swskillers14]

so if i plop in a new 16g turbo to replace the 14b with all other stock parts will it make my car faster or what . you guys are makin it sound like it isnt a big difference if i go to a 16 instead of a 14b?

 

[Patter$on]

im putting out 16 psi stock with injen intake and gutted cat

 

[ECLIPSE4x4]

you really need to read the tuning guid before you decide to just SLAP on a bigger turbo.

There are a lot of varibles that come into play.

The question you asked was VERY vague.

Here are some resources.

http://www.dsmtuners.com/tuning-guide/

http://members.shaw.ca/costall/1000Q/

 

[Colossus]

My friend has a GST...and he peaks at 7 PSI stock. Is this supposed to be only 7 psi? I thought it was 14 psi and 15 psi is fuel cut? Could his guage be wrong? Would a boost controller increase his boost level?