How much boost can I run on this setup?

[TsiBoosted4g63]

Ok....I was just running 20lbs on a 60-1 on rc550 injectors. It was reading 0 counts of knk which was weird to me. I am going to get 750cc injectors so I was wondering how much boost I can run without methanol. **on pump gas

 

[CrazyM]

60 psi.

It's going to be car specific your exact boost you can run. But 20 psi on only 550's seems like a little too much..

 

[TsiBoosted4g63]

well how much would you say with 750cc i have all the other upgrades im just asking a safe amount.....by the way I have been running this setup for about 8months i just want to know how much boost i can run with the 750's

 

[abaum565]

Every car is different, and this one might be the car everyone is baffled by....20psi on a 60-1 with 550's, without seeing a log I would have to call your bluff.

The only way you will know how much boost to run is to keep turning it up until it you see knock or it leans out, and back off.

I would say with 750's and a 60-1 that 20psi would be safe. But you already proved that wrong.

As far as all other upgrades, what is that? Please update your profile.

 

[91AWDGSX1G]

I was running 21 lbs on 550cc at about 75% injector duty cycle. What kind of management are you running? It would be nice if you updated your profile to help out, but if you have ecmlink or something of that caliber, I would go with 950cc injectors. You should be able to get 25+ lbs, again depending on your mods.

 

[habitatguy187]

http://www.dsmtuners.com/forums/tuning-engine-management/244522-injectors-fuel-pumps.html

It's not about psi, it's about airflow. A car with cams at 20psi will be flowing a lot more air than the same car without cams at 20psi.

 

[TsiBoosted4g63]

Every car is different, and this one might be the car everyone is baffled by....20psi on a 60-1 with 550's, without seeing a log I would have to call your bluff.

The only way you will know how much boost to run is to keep turning it up until it you see knock or it leans out, and back off.

I would say with 750's and a 60-1 that 20psi would be safe. But you already proved that wrong.

As far as all other upgrades, what is that? Please update your profile.

Well i did log it and it only had like 3 counts of knk at 7500rpm
thats y i was starting to think my knk sensor was broke

 

[clockworktoy]

Keep in mind you want to keep an eye on your IDC's With my 560's im already at around 90%IDC at 22psi (gauge might be a bit off) on my 60-1. With more fuel you should be able to run anywhere between 20-25psi on pump gas with a great tune on pump. What do your afr's look like?

 

[TsiBoosted4g63]

i dont have wideband

 

[Lusion972]

how about you get a wideband and get your car tuned for the proper amount of boost, just upping the boost without a proper tune is suicide.

 

[TsiBoosted4g63]

how about you get a wideband and get your car tuned for the proper amount of boost, just upping the boost without a proper tune is suicide.

yea thats what i plan on doing. When i got the car 8 months ago the guy had it on 20 lbs and i have been running that until last week. I had a arbage turbo xs boost controller that seemed to not work right so i went and got a hallman pro and put it down to 12 because i dont really wanna risk anything even though i have been running 20lbs since i got it