[saabgofast]

Hi whats a safe psi to run on a 2000 saab 9-5 2.3? I have many of mods like 3 inch exhaust from head to rear bumper. 3 inch air intake from A/M cone air filter to T body ( inner cooler ect ).Hot DI/ tuned comp / so on so on. With the turbo I am running I can hit 20 psi with ease. But the down side is I still am running stock block and head . The engine has about 60k on it. I have tuned it down to about 12-13 psi I don't want to blow any thing up. If any one has any thought on it please let me know. Thanks

 

[SaabNineThree]

Hi whats a safe psi to run on a 2000 saab 9-5 2.3? I have many of mods like 3 inch exhaust from head to rear bumper. 3 inch air intake from A/M cone air filter to T body ( inner cooler ect ).Hot DI/ tuned comp / so on so on. With the turbo I am running I can hit 20 psi with ease. But the down side is I still am running stock block and head . The engine has about 60k on it. I have tuned it down to about 12-13 psi I don't want to blow any thing up. If any one has any thought on it please let me know. Thanks

mine tops out at 20-21 on a 01 with 165000 kms but then again i just put that in

 

[saabgofast]

Did you have to go with bigger injectors? I have some A/M ones I can go with. The reason I ask is when I went to 20psi I heard pinging so I back it off quick.

 

[SectorNine50]

What tune do you have?

 

[ivanwakeup]

dont think in terms of psi man. think in terms of horsepower/torque goals. For a td-04 and stock internals, there is no way you're going to be able to do more than 300-310 bhp safely. that might equate to something around 22-23 psi.

 

[SectorNine50]

dont think in terms of psi man. think in terms of horsepower/torque goals. For a td-04 and stock internals, there is no way you're going to be able to do more than 300-310 bhp safely. that might equate to something around 22-23 psi.

He speaks the truth, and at those PSI numbers your going to see the turbo run out of breath at the higher RPMs, particularly with that 3" piping you have from the turbo to the throttlebody. Keep it at 2.5" or below if you get the opportunity to change the piping, these turbos are way too small and have a hard time filling the pipe to get to the desired pressure. Smaller piping will help with turbo lag as well.

Anyway, if you plan on going to a bigger turbo then the 3" piping might be relevant. If your really wanting to push your numbers past 20 or 21psi, that is the route your going to have to take.

After 300 horsepower, it is said that you should go invest in forged pistons, apparently the block and head on these vehicles can take quite the beating, but the pistons cannot.

 

[saabgofast]

Thanks for the replies. I agree the 3 inch is to big and have been debating to go back to my 2.5. I have the stage 1 in it now. I relay only want to get a happy 250 hp out of it with out going into it any more. But as soon as I bring the turbo past the 12-13 mark I get the engine ping back. Also even at the 12-13 it seems like i have maybe 160-170 hp. The turbo is working great but my car is lucky to out run a caravan at this point. That's why I was thinking injectors? any clues?

 

[SaabNineThree]

Did you have to go with bigger injectors? I have some A/M ones I can go with. The reason I ask is when I went to 20psi I heard pinging so I back it off quick.

I think i know what your talking about i heard a pinging in second gear at very high rpms i dont know wtf that was? it also feels like the brakes are being applied the car like looses power but then regains it and this is while WOT and this is not at the same time each time sometimes it happends and sometimes it does not.

 

[saabgofast]

The pinging does slow things down for me as well I don't know what the hell it was. But it does sound like your will pull at some point in time. As far as mine its the same the whole way ( on pull to speak of ) . Correct me if I'm wrong but doesn't my 2.3 have the small injectors?

 

[SaabNineThree]

I just went for a spin i got flashing CEL aka severe missfire under massive load in second gear, it has to be lack of fuel..... im farily sure its not the plug because i have had these in for a while, and only now when i have a stage 3 did i get flashing cel, especialy under load in the strongest gear. i emailed JZW asking him so hopefully i get a responce see if i net new injectors and a 3.5 bar fpr

 

[SaabNineThree]

http://repairpal.com/misfire-what-does-it-mean

Generally, the term misfire refers to an incomplete combustion process inside the cylinder. When this becomes severe enough, the driver will feel a jerking action from the engine and/or power train. Often the owner will bring the vehicle into a shop complaining that "the timing is off." This is partially correct because a misfire does involve a mis-timed combustion event. However, the base ignition timing being out of adjustment is only one reason for a misfire to occur—and not the most likely.

exactly what i feel

 

[Jssaab]

Have you checked A/F ratios? If you are to lean you will get ping, severe ping will blow a piston regardles of PSI or horsepower you are running

 

[saabgofast]

Well I do have to say if I get on it hard I get the miss fire code as well ( quick spin around town ) light flashing. scanner says multiple missfire. I have allways suspected that my injectors are crap. I fill it with 93 and injector cleaner. It runs better next to no ping/shatter.At high rpm. With just 93 after a few tanks with out cleaner ping is back. But at this point it is like my saab has been neutered.

 

[ivanwakeup]

Have you checked A/F ratios? If you are to lean you will get ping, severe ping will blow a piston regardles of PSI or horsepower you are running

vouch. i always relate pinging or knocking to one of two things (which equate to much the same thing anyway): either too low of fuel octane content, or a lean (as in not enough gas) mix.

saabninethree- did you get the live telemetry with your tune? you should have a function that tells you A/F mix. it should be RIGHT AT or even a little above stoicometric (not sure if i spelled that right) which is like 14.87:1 if i am not mistaken.

 

[saabgofast]

That is somthing that I have not checked. First thing in the morning I will let everyone know what I find out. But that is what I have been thinking. Saab nine three I think it may be a A/F issue as well.

 

[SaabNineThree]

Have you checked A/F ratios? If you are to lean you will get ping, severe ping will blow a piston regardles of PSI or horsepower you are running

is the ping physical engine noise or is that ping being caused by something within the cars electronics, i spoke to john he said i was missing out the 3.5 fpr so thats going to be bought ASAP and thats whats causing the issues.

 

[saabgofast]

I think thats right. I am going out right now and checking my A/F mix. I will post back with my find

 

[SectorNine50]

is the ping physical engine noise or is that ping being caused by something within the cars electronics, i spoke to john he said i was missing out the 3.5 fpr so thats going to be bought ASAP and thats whats causing the issues.

Physical engine noise, the ignition is happening at the wrong part of the stroke.

I think thats right. I am going out right now and checking my A/F mix. I will post back with my find

Just out of curiosity, what tune are you running (company, stage, etc.)?

 

[SaabNineThree]

Physical engine noise, the ignition is happening at the wrong part of the stroke.



Just out of curiosity, what tune are you running (company, stage, etc.)?

Okay thanks it makes sence it all came to me when i got the CEL

 

[saabgofast]

HOLY INBRED MIDGETS BATMAN !!!!!! That thing moves. I was going in to the injector rail I found that the fpr rubber line had a big crack in it. I could not believe it I replaced every line on it when I changed the engine. Well I only had to do try everything to find it. Also does any one know what cc the green giants are?