: How much boost is safe?


Blac
03-10-2010, 01:43 PM
Wondering how much boost would be safe to run on my current setup....wanting to do 25 psi. Power mods listed below:

AMS Intake w/heat shield
AMS Test Pipe
AMS Cat-Back Exhuast
AMS UICP
AMS FMIC
Forge ANOS MBC

Think i'm only pushing about 20-21psi now. Any help you guys could give would be greatly appreciated..Thanks!

hotdog
03-10-2010, 01:47 PM
Are you doing an ECU tune, or just cranking the MBC for giggles?

Evooooo
03-10-2010, 01:53 PM
id say about 50 psi ull b good haha....im running 27psi with minimal to no knock all the way 2 redline...supposedly its efficency rate is right around 26-27 psi. You shud be safe.

Blac
03-10-2010, 01:59 PM
Are you doing an ECU tune, or just cranking the MBC for giggles?
Car has a tune on it...however i wasn't sure if i should manually turn up the boost...the guy who tuned it said something about 25 psi being safe i think, but he is in texas now...arg. Just wanna be getting most i can..trying to make sure i am at least breaking into the 300whp area. I'm a noob at all of this so...if thats unrealistic just let me know.

Blac
03-10-2010, 02:00 PM
id say about 50 psi ull b good haha....im running 27psi with minimal to no knock all the way 2 redline...supposedly its efficency rate is right around 26-27 psi. You shud be safe.
Hmmm if thats true 25 should be fine...might test it out this weekend.

Whitewind
03-10-2010, 02:04 PM
Man you don't just turn boost up on a tuned car. Need be retuned for that psi/load it will hit. Everything changes when changing PSI, keep that in mind.

Now If the tuner built you map for higher boost all is well.

kirk212
03-10-2010, 02:05 PM
Im running 25-26 psi at peak boost pressure without any issues.

-Evolved Boost-
03-10-2010, 02:06 PM
Car has a tune on it...however i wasn't sure if i should manually turn up the boost...the guy who tuned it said something about 25 psi being safe i think, but he is in texas now...arg. Just wanna be getting most i can..trying to make sure i am at least breaking into the 300whp area. I'm a noob at all of this so...if thats unrealistic just let me know.

With those mods you listed in your first post...and you said your tuned...you should definitely be over 300whp. Im guessing you where road tuned? Since you don't know how much power your puttin down. Actually i may take back the fact that your over 300whp right now...you should be, but 20-21psi is kinda low. When i was tuned with just bolt-ons and a tune (which consists of the parts you listed plus AMS o2/downpipe and AMS LICP) i put down 345whp...but this was on 25psi. Since your only on 20psi and couple less bolt-ons you may be sitting right near 300whp. Either way i highly suggest you don't crank the boost up yourself if you where already tuned for the boost your at now which is around 20psi.

Whitewind
03-10-2010, 02:09 PM
Im running 25-26 psi at peak boost pressure without any issues.

Again he had someone tune his car for the 20-21psi.

You got an AP your running. Not the same.

Blac
03-10-2010, 02:32 PM
Thanks for all the quick replies guys!! I'm emailing the guy who tuned my car to talk to him about the whole 25 psi thing. I just wanna get the most out of my mods...and yeah it was street tuned. If i got it dyno'd would a be able to see my afr and determine if i could go up in boost? I just thought of that...supposed to be a dyno day coming up on the 20th in my area.

hollywood_X
03-10-2010, 03:08 PM
Thanks for all the quick replies guys!! I'm emailing the guy who tuned my car to talk to him about the whole 25 psi thing. I just wanna get the most out of my mods...and yeah it was street tuned. If i got it dyno'd would a be able to see my afr and determine if i could go up in boost? I just thought of that...supposed to be a dyno day coming up on the 20th in my area.

You spent all that money on the car and those expensive parts why did you have "some guy" tune you to 20psi? I see your out east I suggest you go to a known shop with a dyno and see what you have now vs what they can do for you.

In addition I have yet to see a stock turbo car make more power at boost levels over 24.5 without higher octane fuel or Meth.

Blac
03-10-2010, 04:33 PM
You spent all that money on the car and those expensive parts why did you have "some guy" tune you to 20psi? I see your out east I suggest you go to a known shop with a dyno and see what you have now vs what they can do for you.

In addition I have yet to see a stock turbo car make more power at boost levels over 24.5 without higher octane fuel or Meth.
It wasn't just "some guy" that tuned the car. It was Jorge from JMS in San Antonio. Relatively new shop, but they do good work. Should have a reply from him soon on the issue. I just can't remember if he said i could turn up the boost ... regardless...i will get the car dyno'd soon and post up the numbers, along with if i hit the magical 25 psi mark.

Whitewind
03-10-2010, 04:54 PM
Just remember "Jorge" is just some guy,(Meaning everyone is some guy) If he does not have a TUNED map for you at 25psi or whatever its not SAFE to run that psi. You don't understand on how tuning work. When changing your PSI you change your load cells you are hitting and that changes everything.

1. Do you have way see your AFR's
2. You have anything log with showing knock?

Or you can just crank that MF'er up and watch how money blows. Sorry if I come across as a dick but it is just how I feel on this.

Blac
03-10-2010, 05:10 PM
Just remember "Jorge" is just some guy,(Meaning everyone is some guy) If he does not have a TUNED map for you at 25psi or whatever its not SAFE to run that psi. You don't understand on how tuning work. When changing your PSI you change your load cells you are hitting and that changes everything.

1. Do you have way see your AFR's
2. You have anything log with showing knock?

Or you can just crank that MF'er up and watch how money blows. Sorry if I come across as a dick but it is just how I feel on this.
WOW...lol did i say something? Your not a dick man...at least i don't feel that way from what you commented. It was actually helpful. I need to find out what my car is tuned for and go from there. Trust me i'm not trying to blow up anything...paid way to much money..and i love my car. I figure best way to learn something is to ask the questions. :nerd: I'm a noob so all this info is great for me.

whitecomet
03-10-2010, 05:13 PM
Like hollywood stated 24.5 should be your goal you will be fine.

Whitewind
03-10-2010, 05:13 PM
No you did not but did not want you think I was being a dick lol.

Just keep that info in mind. I would wait too get retuned on the dyno myself man.

Blac
03-10-2010, 05:30 PM
Thanks guys!

Blac
03-11-2010, 11:33 AM
So i talked to Jorge and he says that he originally tuned it for about 23 psi , but left room with the AFR for about 24-25 psi. Not sure why, he said maybe it was the change from texas to maryland, but the car is only showing 20 psi. ARG! Think when i dyno i'll be able to see what the car is really doing.

TURNITUP
03-11-2010, 11:37 AM
I was on 30psi no knock.....

Blac
03-11-2010, 11:41 AM
I was on 30psi no knock.....
wow is that really all you have on your car...your making nice power...and the 30 PSI was probably because you have cams...just guessing. I just wanna get to around 350whp for now...and i think i can do it with what i have just need to dial it in...and maybe get a WGA or BOV. But i figure 25 psi (24.5 usuable..lol) should put me where i wanna be.

TURNITUP
03-11-2010, 12:06 PM
Yea my car for some reason is making great power. I made 425tq with 32psi and it didn't knock! I was not going to leave it like that because it is my daily driver and didn't want to ruin anything. I'm doing a 100 octane map to see how much I can squeeze out. My clutch started to slip on the last dyno run so we couldn't finish but the car has more in it on pump after I add a intake pipe :0 moving over to a red soon...it's basically all in the tune.

joey
03-11-2010, 12:07 PM
40psi

TURNITUP
03-11-2010, 12:16 PM
joey lol 40psi hahah

Blac
03-11-2010, 12:41 PM
Yea my car for some reason is making great power. I made 425tq with 32psi and it didn't knock! I was not going to leave it like that because it is my daily driver and didn't want to ruin anything. I'm doing a 100 octane map to see how much I can squeeze out. My clutch started to slip on the last dyno run so we couldn't finish but the car has more in it on pump after I add a intake pipe :0 moving over to a red soon...it's basically all in the tune.
So those numers are on stock turbo and clutch?

TURNITUP
03-11-2010, 01:06 PM
yes sir! I can prove it to anyone no lies here....my hp will be higher but I need to change my intake. I'm just on a cone filter now and its a bottleneck! I'm basically making race gas or e85 numbers and I'm on pump :) I love the instant hit of the stock turbo its so much fun. I'm upgrading to a fidanza 4.3 clutch soon...

Blac
03-11-2010, 01:25 PM
yes sir! I can prove it to anyone no lies here....my hp will be higher but I need to change my intake. I'm just on a cone filter now and its a bottleneck! I'm basically making race gas or e85 numbers and I'm on pump :) I love the instant hit of the stock turbo its so much fun. I'm upgrading to a fidanza 4.3 clutch soon...
SICK !!!!!:+1::bowlol:

Whitewind
03-11-2010, 02:04 PM
Well turnitup what was your base run numbers? (here we go lol) With out having a base run they are just "numbers".

Also 30psi sometime does not mean your bringing better numbers. Keep mind to some people don't have higher Oct level as others.

Back on topic: Okay your AFR's "might" be good but what if they are not. Can you watch your AFR's? Also timing changes while you are hitting higher/lower cells are they tune for it and how will you know? Play it safe man. Get a re-tune from someone else and not over the phone but if he was looking at your logs and such, yeah he could tune you. But with out logs and everything need for a "good" tune your playing with fire my friend.

Blac
03-11-2010, 02:59 PM
Well turnitup what was your base run numbers? (here we go lol) With out having a base run they are just "numbers".

Also 30psi sometime does not mean your bringing better numbers. Keep mind to some people don't have higher Oct level as others.

Back on topic: Okay your AFR's "might" be good but what if they are not. Can you watch your AFR's? Also timing changes while you are hitting higher/lower cells are they tune for it and how will you know? Play it safe man. Get a re-tune from someone else and not over the phone but if he was looking at your logs and such, yeah he could tune you. But with out logs and everything need for a "good" tune your playing with fire my friend.
Planning on it....looking for a good local tuner...right now i've sent emails to IAG and CP-E. Hopefully they can help me out with the info i need, a solid tune, and some numbers to boot.

Whitewind
03-11-2010, 03:09 PM
If you can get a base run on the dyno first. It will show true power gains when you do a dyno pull tuned. Some dyno's read very high and very low. but % between the base run and tune runs do not lie. Then send them to Hollywood. His posting thread up that will show a lot on dyno shit.

hollywood_X
03-11-2010, 03:15 PM
I was on 30psi no knock.....

Yea my car for some reason is making great power. I made 425tq with 32psi and it didn't knock! I was not going to leave it like that because it is my daily driver and didn't want to ruin anything. I'm doing a 100 octane map to see how much I can squeeze out. My clutch started to slip on the last dyno run so we couldn't finish but the car has more in it on pump after I add a intake pipe :0 moving over to a red soon...it's basically all in the tune.

What are your running for peak boost timing? -2*?

pmbaby24
03-11-2010, 05:14 PM
i'm tuned at 24.5 something psi no knock at all...

Whitewind
03-11-2010, 05:18 PM
You guys got remember boost does not always mean going knock or not knock. Everything plays a factor in knock, Timing, fuel, boost Mivec etc. Not just boost.