Turbo Sizing for a HEAVY T56 Truck?
#1
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Anyone have thoughts on sizing a turbo for a heavy (5000+ lb) truck with a 5.3L and a 6-speed T56? How does the weight and the manual trans affect turbo sizing?
I'm mostly curious about turbine sizing. Is a smaller turbine better, or is larger the way to go? Quick spool and usable power is the goal, rarely will I be shifting above 5500rpm. Looking for ~600rwhp.
I have a 76/65 0.96AR on the shelf, and it would probably choke out above 5500rpm, but it would spool well I think. I'd like to use it but could sell it and go with something else.
What about a 68/77?
I'm mostly curious about turbine sizing. Is a smaller turbine better, or is larger the way to go? Quick spool and usable power is the goal, rarely will I be shifting above 5500rpm. Looking for ~600rwhp.
I have a 76/65 0.96AR on the shelf, and it would probably choke out above 5500rpm, but it would spool well I think. I'd like to use it but could sell it and go with something else.
What about a 68/77?
#3
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
#5
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
The 76/65 I have is your standard Magnum T76:
Compressor: 76.7 in, 102.3 ex, 0.80 A/R, 4" inlet, 2.5" outlet
Turbine: 74.5 in, 65 ex, 0.96 A/R, T4, 3" v-band
This is the only one I have. I could step up to a 1.15 A/R divided housing. Or buy another one instead of polishing a turd that won't work well.
Compressor: 76.7 in, 102.3 ex, 0.80 A/R, 4" inlet, 2.5" outlet
Turbine: 74.5 in, 65 ex, 0.96 A/R, T4, 3" v-band
This is the only one I have. I could step up to a 1.15 A/R divided housing. Or buy another one instead of polishing a turd that won't work well.
#7
Launching!
iTrader: (7)
Join Date: Aug 2003
Location: Spring, TX
Posts: 269
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech20year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I would post on the performancetrucks site at the top. Lots of turbo trucks over there. Your username should over there too.
Edit.. I just looked on PT.net and could see that you already have a thread over there. Have you changed your mind from below.?..
"My setup will be a 76mm intercooled KB kit, LS9 gaskets and ARP head studs, 212/212 114 LSA cam."
Edit.. I just looked on PT.net and could see that you already have a thread over there. Have you changed your mind from below.?..
"My setup will be a 76mm intercooled KB kit, LS9 gaskets and ARP head studs, 212/212 114 LSA cam."
Last edited by aQuickLS1; 09-19-2012 at 03:12 PM.
Trending Topics
#9
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I would post on the performancetrucks site at the top. Lots of turbo trucks over there. Your username should over there too.
Edit.. I just looked on PT.net and could see that you already have a thread over there. Have you changed your mind from below.?..
"My setup will be a 76mm intercooled KB kit, LS9 gaskets and ARP head studs, 212/212 114 LSA cam."
Edit.. I just looked on PT.net and could see that you already have a thread over there. Have you changed your mind from below.?..
"My setup will be a 76mm intercooled KB kit, LS9 gaskets and ARP head studs, 212/212 114 LSA cam."