2010 ralliart how much boost can I run
Feb 10, 2014, 07:31 PM
#1
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2010 ralliart how much boost can I run
I have a 2010 ralliart and I'm installing a new one in two weeks how much boost can I run on my ralliart turbo ?
Feb 11, 2014, 01:41 AM
#3
Evolved Member
"It all depends", is the answer.
Not sure what you're installing a new one of... new turbo? New tune?
If you try to hold "stock Evo X" levels of boost with a stock RA turbo, it'll blow a lot of hot air in the top part of the rev range.
The stock RA intercooler is junk... so you'll heatsoak in no time.
An Evo X intercooler is better, but even that will fail to cope after a relatively moderate amount of constant WOT driving.
Here's a specific example. I have stock RA turbo, Evo X FMIC. I ran a track session hitting 22.2psi boost, holding that until around 5000rpm, tapering through 20psi at 6000rpm, and then touching barely 13-14psi at 7000rpm.
Ambient temp, around 32 degrees Celsius.
First lap, she ran like a champ. In the logs, manifold air temp bumped up a bit when throttled off, but opening her up out of corners saw MAT go down again. All was good.
On the second lap, she started knocking like a *****. MAT was no longer reducing when I went WOT out of corners and down the straight. At the point the logs showed MAT starting to increase at full throttle, the knocking incidents began.
The tiny little turbo was being run way outside its comfort zone. After a while, the intercooler gets heatsoaked.
So... it all depends on what you want to do with the car.
The occasional WOT squirt on the road will usually cope with higher boost more than, say, running all the way to the top of 6th on a big, long, speed-limit-free road. Multiple laps on track, and/or hot days will warrant lower boost.
Hope this helps!
Rich
Not sure what you're installing a new one of... new turbo? New tune?
If you try to hold "stock Evo X" levels of boost with a stock RA turbo, it'll blow a lot of hot air in the top part of the rev range.
The stock RA intercooler is junk... so you'll heatsoak in no time.
An Evo X intercooler is better, but even that will fail to cope after a relatively moderate amount of constant WOT driving.
Here's a specific example. I have stock RA turbo, Evo X FMIC. I ran a track session hitting 22.2psi boost, holding that until around 5000rpm, tapering through 20psi at 6000rpm, and then touching barely 13-14psi at 7000rpm.
Ambient temp, around 32 degrees Celsius.
First lap, she ran like a champ. In the logs, manifold air temp bumped up a bit when throttled off, but opening her up out of corners saw MAT go down again. All was good.
On the second lap, she started knocking like a *****. MAT was no longer reducing when I went WOT out of corners and down the straight. At the point the logs showed MAT starting to increase at full throttle, the knocking incidents began.
The tiny little turbo was being run way outside its comfort zone. After a while, the intercooler gets heatsoaked.
So... it all depends on what you want to do with the car.
The occasional WOT squirt on the road will usually cope with higher boost more than, say, running all the way to the top of 6th on a big, long, speed-limit-free road. Multiple laps on track, and/or hot days will warrant lower boost.
Hope this helps!
Rich
Feb 12, 2014, 07:56 AM
#5
I run 23PSI on stock turbo and stock intercooler, i'm planing get a X intercooler but i heard that i need a tune for new intercooler. Wasn't sure is this correct, can i just get a intercooler and get a tune a month later?
Feb 12, 2014, 07:57 AM
#6
"It all depends", is the answer.
Not sure what you're installing a new one of... new turbo? New tune?
If you try to hold "stock Evo X" levels of boost with a stock RA turbo, it'll blow a lot of hot air in the top part of the rev range.
The stock RA intercooler is junk... so you'll heatsoak in no time.
An Evo X intercooler is better, but even that will fail to cope after a relatively moderate amount of constant WOT driving.
Here's a specific example. I have stock RA turbo, Evo X FMIC. I ran a track session hitting 22.2psi boost, holding that until around 5000rpm, tapering through 20psi at 6000rpm, and then touching barely 13-14psi at 7000rpm.
Ambient temp, around 32 degrees Celsius.
First lap, she ran like a champ. In the logs, manifold air temp bumped up a bit when throttled off, but opening her up out of corners saw MAT go down again. All was good.
On the second lap, she started knocking like a *****. MAT was no longer reducing when I went WOT out of corners and down the straight. At the point the logs showed MAT starting to increase at full throttle, the knocking incidents began.
The tiny little turbo was being run way outside its comfort zone. After a while, the intercooler gets heatsoaked.
So... it all depends on what you want to do with the car.
The occasional WOT squirt on the road will usually cope with higher boost more than, say, running all the way to the top of 6th on a big, long, speed-limit-free road. Multiple laps on track, and/or hot days will warrant lower boost.
Hope this helps!
Rich
Not sure what you're installing a new one of... new turbo? New tune?
If you try to hold "stock Evo X" levels of boost with a stock RA turbo, it'll blow a lot of hot air in the top part of the rev range.
The stock RA intercooler is junk... so you'll heatsoak in no time.
An Evo X intercooler is better, but even that will fail to cope after a relatively moderate amount of constant WOT driving.
Here's a specific example. I have stock RA turbo, Evo X FMIC. I ran a track session hitting 22.2psi boost, holding that until around 5000rpm, tapering through 20psi at 6000rpm, and then touching barely 13-14psi at 7000rpm.
Ambient temp, around 32 degrees Celsius.
First lap, she ran like a champ. In the logs, manifold air temp bumped up a bit when throttled off, but opening her up out of corners saw MAT go down again. All was good.
On the second lap, she started knocking like a *****. MAT was no longer reducing when I went WOT out of corners and down the straight. At the point the logs showed MAT starting to increase at full throttle, the knocking incidents began.
The tiny little turbo was being run way outside its comfort zone. After a while, the intercooler gets heatsoaked.
So... it all depends on what you want to do with the car.
The occasional WOT squirt on the road will usually cope with higher boost more than, say, running all the way to the top of 6th on a big, long, speed-limit-free road. Multiple laps on track, and/or hot days will warrant lower boost.
Hope this helps!
Rich
I run 23PSI on stock turbo and stock intercooler, i'm planing get a X intercooler but i heard that i need a tune for new intercooler. Wasn't sure is this correct, can i just get a intercooler and get a tune a month later?
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Mar 10, 2014, 04:51 PM
#8
Newbie
I run 28.5 psi and made 285whp/310wtq on a low reading mustang dyno/E85 Ethanol. and its been holding fine... Turbo blew a while after that though 
Was already looking into turbo swap and it was the perfect time to max the RA turbo. you should be fine around 25-27psi. The problem is, the torque hits early and the boost tends to taper near 5000rpm.
Was already looking into turbo swap and it was the perfect time to max the RA turbo. you should be fine around 25-27psi. The problem is, the torque hits early and the boost tends to taper near 5000rpm.
Mar 11, 2014, 04:23 AM
#10
Newbie
@richardhj why not? we datalogged the car wot pull to wot pull and did not see any heat soak with the intercooler system, keep in mind that I have an ETS 4'' intercooler. The car performed well pull to pull, I can see where the turbo tapered off near 5500 rpm, but it wasn't meant to be long lasting. I knew that I would be upgrading trans/turbo after a few months... So why wouldn't you run that much boost on RA turbo? I know it probably isn't the best thing to do... but b/c it was temporary it wasnt too bad.
Mar 11, 2014, 10:25 AM
#11
Evolving Member
The amount of boost you can run is determined by many factors.
1. Supporting mods
2. Turbo size
3. Stock engine components or upgraded
Myself and most of my RA friends run around 28 to 29 max psi. We could run more but to help the turbo last we keep it lower. I myself run 18.5 min and 29.5 max
You want to use as little amount of boost as needed to create the desired effect. You want it like this because it maximizes efficiency and keeps temps down. I do not know what mods you have but I would keep the boost low unless you upgrade the intercooler.
Mar 12, 2014, 03:22 AM
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everyone is an idiot
Bump already on a bigger turbo I was told by 3 different tuners the ralliart can't handle more then 17 pounds anything more then that is not a hp gain just stuffing your engine with hot air till your car hits 4500 rpm and boost drops back down to 17!!!
Mar 12, 2014, 04:51 AM
#15
Evolved Member
Because when that little voice inside my head says "it probably isn't the best thing to do", I actually listen to it.
Glad it's working for you!
My car only has an Evo X stock intercooler. While it's an incremental improvement on the useless stock RA thing, it certainly isn't bullet-proof when faced with hot days, continuous WOT, etc.
Different vehicle setup, usage, environment... so different approach needed.
Rich