Max safe boost? [Merged 10-6]

[Turbolaser]

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

 

[talondave]

at least get aftermarket head studs... 20 psi is pushing it without that it...

Agreed!!! If you don't have the already!

 

[95GreenGSX]

at least get aftermarket head studs... 20 psi is pushing it without that...

Nope I dont have that. 100% stock motor. Ill def look into some arp's when I go bigger with injectors and link. So the question still remains how much power/ boost can a stock motor has before it blows? Asuming all the supporting mods are there?

 

[97ClipseDSM]

Your problem is that you have no tuning device. An Apexi SAFC would do the job. Im willing to bet you are running extremely crappy with 550cc injectors and a walbro 255 fuel pump, and no tuning device. You are also overflowing the stock FPR. Your gas mileage is probably real crappy and your car must sputter under boost.

To answer your question, yes you can run 25PSI on an 18G with your 550cc injectors and 255 fuel pump, on bone stock motor. Your question about how many psi can blow stock motor does not have an easy answers. It all depends on your tune, ive seen people run 25-28 psi on stock motors.

 

[95GreenGSX]

Your problem is that you have no tuning device. An Apexi SAFC would do the job. Im willing to bet you are running extremely crappy with 550cc injectors and a walbro 255 fuel pump, and no tuning device. You are also overflowing the stock FPR. Your gas mileage is probably real crappy and your car must sputter under boost.

To answer your question, yes you can run 25PSI on an 18G with your 550cc injectors and 255 fuel pump, on bone stock motor. Your question about how many psi can blow stock motor does not have an easy answers. It all depends on your tune, ive seen people run 25-28 psi on stock motors.

Actually no, you lost your bet. I have an afpr and running rich but only 8.5 or 9 at WOT. I have no sputtering, I think you think that I'm running 25 psi as is, I'm not. I'm running around 18. I'm waiting on dsmlink to tune my car. I just wanted to know what the motor can handle stock. I'm not building it until winter. I am planning on getting bigger injectors and pushing the boost higher.

 

[zhjiln]

Nope I dont have that. 100% stock motor. Ill def look into some arp's when I go bigger with injectors and link. So the question still remains how much power/ boost can a stock motor has before it blows? Asuming all the supporting mods are there?

well good to hear that....

ARP Hardware
machv has them for a little over 100 bucks

extremepsi.com is a bit more expensive for some reason...

 

[97ClipseDSM]

Ok thanks for mentioning the AFPR. I just assumed you didnt have one because your mod list is empty. How much boost these motors can handle is subjective, each turbo's boost level is measured differently(PSI). I would say around 28 psi is what these motors can handle stock without putting serious wear on the engine.

 

[95GreenGSX]

Ok thanks for mentioning the AFPR. I just assumed you didnt have one because your mod list is empty. How much boost these motors can handle is subjective, each turbo's boost level is measured differently(PSI). I would say around 28 psi is what these motors can handle stock without putting serious wear on the engine.

Sorry I forgot to mention my other mods. Thanks for looking out for me.

 

[95GreenGSX]

well good to hear that....

ARP Hardware
machv has them for a little over 100 bucks

extremepsi.com is a bit more expensive for some reason...

Are these the right ones from extreme psi? If so there only $80

EXTREME PSI : Your #1 Source for In Stock Performance Parts - ARP Head Studs: Mitsubishi Eclipse 90-92 6 Bolt

 

[zhjiln]

Are these the right ones from extreme psi? If so there only $80

EXTREME PSI : Your #1 Source for In Stock Performance Parts - ARP Head Studs: Mitsubishi Eclipse 90-92 6 Bolt

hmm..thats wierd.... i might need to get my eyes check...

well problem solved...

 

[oldman420]

I wouldn't run over 20 without ARP's and no way of tuning. 18 right now is probably just about right for your mods, you mentioned your A/F ratio so i'm asuming you have a wideband. If that is the case then get some arp's right away, find some way to log, use your wideband and crank it up till your see knock or lean conditions.

 

[jrohner]

So you just lowered the fuel pressure to turn your 550's back into 450's basically? You do realize this did nothing for you right?

750/780's would be about right even for E85 with the 18G (even if you get cams and other goodies), although 850/880's can usually be had for close to the same price and will give you extra headroom for more hp later (450awhp on a dynojet would probably be the limit on 750's on E85).

 

[->PrOjEcTGS<-]

Sorry, I had to:
<embed src = "http://www.xtranormal.com/players/jwplayer.swf" width = "500" height = "350" allowscriptaccess = "always" allowfullscreen = "true" flashvars = "height=350&width=500&file=http://tmpvideo.xtranormal.com/highres/20090326/3176d764-19e1-11de-bf7b-001b210ae39a_11.flv&image=http://tmpvideo.xtranormal.com/highres/20090326/3176d764-19e1-11de-bf7b-001b210ae39a_11_0.jpg&searchbar=false&autostart=false"></embed>

 

[UGOT8UP]

You got to much time on your hands

 

[N1te]

Get a basic tuning device and boost safely. Yes you might be able to run more power but the engine is going to blow without headstuds and a good tune.

 

[EDM95]

Sorry, I had to:
<embed src = "http://www.xtranormal.com/players/jwplayer.swf" width = "500" height = "350" allowscriptaccess = "always" allowfullscreen = "true" flashvars = "height=350&width=500&file=http://tmpvideo.xtranormal.com/highres/20090326/3176d764-19e1-11de-bf7b-001b210ae39a_11.flv&image=http://tmpvideo.xtranormal.com/highres/20090326/3176d764-19e1-11de-bf7b-001b210ae39a_11_0.jpg&searchbar=false&autostart=false"></embed>

How did you make that? That is cool man.

 

[fastfive0]

Sorry, I had to:
<embed src = "http://www.xtranormal.com/players/jwplayer.swf" width = "500" height = "350" allowscriptaccess = "always" allowfullscreen = "true" flashvars = "height=350&width=500&file=http://tmpvideo.xtranormal.com/highres/20090326/3176d764-19e1-11de-bf7b-001b210ae39a_11.flv&image=http://tmpvideo.xtranormal.com/highres/20090326/3176d764-19e1-11de-bf7b-001b210ae39a_11_0.jpg&searchbar=false&autostart=false"></embed>

I eff'n love this .....what program did you use to make it? Would love to see a fast and the furious remake.....

 

[knochgoon24]

Sorry, I had to:
...

My slow internet connection hates your video...

 

[4GTSiMAN63]

, I love that, look at the dance at the end !

 

[TheDarkKnight]

Ok, i am trying to learn more about boost. I just bought a used 4g63t, and when i get it back i want to run the highest, and safest level of boost possible. The motor is stock, and the mods are high flow cat, 2.5 full exhaust system, aftermarket headers, forge BOV. So whats the best boost i can run safely, and how do you increase boost? Thanks for your time.

 

[acroatt]

Did you purchase a boost controller also? I would get one of those if you dont already.

 

[DSM_ThuNDeR]

keep it at 10 psi for now... upgrade your fuel pump, get a mbc, exhaust upgrade, and maybe some aluminum intercooler piping, and you would be good to run 15 psi on 93 octane.

 

[gnen1st]

also make sure you have a boost gauge the stock ones arent the best choice

 

[TheDarkKnight]

keep it at 10 psi for now... upgrade your fuel pump, get a mbc, exhaust upgrade, and maybe some aluminum intercooler piping, and you would be good to run 15 psi on 93 octane.

what do you mean exhaust upgrade, i already got a 2.5 aftermarket exhaust, and a highflow cat, and headers, what esle is there to do?

 

[TheDarkKnight]

and yeh im trying to get some gauges, and a boost controller will be coming shortly after that, but i read the free mods, and they said to remove the boost restricter to get an extra 1 or 2 boosts. so yeh thats what im doing right now

 

[aaronhawk60]

first get and install a boost gauge then a boost controller then you will be good to 16psi anything more than that and you need to upgrade fuel pump and injectors