sledfvr
Pro
I have a friend with an apex and he wants a low boost 10psi turbo. He is looking at this:
"This is a brand new Garrett oil/water cooled T28 turbo. (T25 hotside/ T3 cold side=A/R 48) with adjustable wastegate. This is a $1200 replacement/upgrade turbo. It flows 448 cfm! It should flow in excess of 25psi. Not bad for a hot street build."
I'm not too familiar with turbo sizing, but isn't a .48 A/R too small for an apex?
"This is a brand new Garrett oil/water cooled T28 turbo. (T25 hotside/ T3 cold side=A/R 48) with adjustable wastegate. This is a $1200 replacement/upgrade turbo. It flows 448 cfm! It should flow in excess of 25psi. Not bad for a hot street build."
I'm not too familiar with turbo sizing, but isn't a .48 A/R too small for an apex?
That would work, but if he plans on staying at the 10 psi mark, the 28/54 turbo that Simmons CPR uses or the 2554 that powderlites used to use is great for low boost set ups. Very responsive just max out in the low teens for boost. The 28/60 off any of the turbo kit makers is great and you will save a few bucks if you buy from powderlites, he ports the wastegate and ceramic coats it as well. Or give Ulmer a call he will take care of you to.
07STI_Matt
Pro
he will also need an intercooler that flows 448 CFM to maxamize effiancy and max HP. i think for low boost the t25 is a better bang for the buck
Turk
Tech Advisor
The 1st kits that came out in 03(i got one & it,s still running strong today) used the 2554. super quick spool up & good to 14 pounds boost.The guy i sold it to can not kill it! Great little sleeper sled. Issue,s with early build headers tho!.....just a heads up.
That description is only telling you one thing that you need to know, and that is it's t25 turbine flanged and it's a t28 turbine wheel. The other thing you need to know is what compressor wheel it has (54, 60, or even 71mm), and if it's a gt ball bearing, not journal bearing. And yes, .48 a/r is to small on a turbo for a apex weather it's refering to the turbine housing or compressor housing (there are a/r's for both). Generally you want a .60 a/r for the compressor housing and .64 a/r on the turbine housing for low boost apps on a gt 2854 or 2860. If it states that it flows 448 cfm it's probably a 60mm wheel.
sledfvr
Pro
It was a turbo for a saab. I think it will hold to much heat back, so I'm going another route. Thanks
