/6 turbo info
That might be a K26 off that benz. I think the rule for diesel turbos is use one that is used on a larger turbo motor. Eg, and HX35 off a Cummins RAM is supposed to be a excellent turbo, but the wastegate is set way too high for our motors, like 21 psi! You would want maybe 12 max if you are running stock internals, as 15psi is about double the HP of a stocker. Welcome to the world of Turbo maps. Ray Hall Turbocharging has a widget that tells us to use a Garrett GT25 (NOT a T25, which is way different and way smaller) but youll have to really understand what those numbers mean and keep in mind the maps seem to use different flow units depending on who makes them. KKK maps are all in German! TRick is to put diagonal boost line as much in the middle "island" as possible, that gets you the best efficiency with the least heat. T04B is a good choice for starters, check out its map and go from there. smaller turbos have the island more toward the left of the graph (think flow from least left to most right) and then the huge turbos are way to the left and go up (boost capacity) which doesnt really help us unless you run forged pistons and K1 rods. About 1.5 BAR (7psi boost) or 21 psi TOTAL pressure (1ATM + 7 psi) is a good stock motor boost level. I was told no PV mods needed until over 8 on a Holley 350/500 or 600 4bbl. I think the 225 flows at about 240 cfm at 5000 RPM so do your conversions to get the meters cubed
Check this site out, http://www.squirrelpf.com/turbocalc/ excellent calculator if you know the variables: They show your combo as a red line on all the different turbo maps, for instance the K26 looks a little small as I suspected.
then this one is almost perfect T04B H-3 , the horizontal line at the end is the wastegate limiting the boost.
and finally a Buick GN turbo (TB0348, that 300 Benz might have a TB0360) using our baseline figures of 350 HP, 3.7l , 12:1 AFM, BSFC .43 (?) 1.7 I/C loss (?) 5500 redline 5000 peak HP, 3800 max boost and 2500 min boost, all other things sortof auto-populated but you get the idea. If anyone has hard numbers for a 225, chime in.
That might be a K26 off that benz. I think the rule for diesel turbos is use one that is used on a larger turbo motor. Eg, and HX35 off a Cummins RAM is supposed to be a excellent turbo, but the wastegate is set way too high for our motors, like 21 psi! You would want maybe 12 max if you are running stock internals, as 15psi is about double the HP of a stocker. Welcome to the world of Turbo maps. Ray Hall Turbocharging has a widget that tells us to use a Garrett GT25 (NOT a T25, which is way different and way smaller) but youll have to really understand what those numbers mean and keep in mind the maps seem to use different flow units depending on who makes them. KKK maps are all in German! TRick is to put diagonal boost line as much in the middle "island" as possible, that gets you the best efficiency with the least heat. T04B is a good choice for starters, check out its map and go from there. smaller turbos have the island more toward the left of the graph (think flow from least left to most right) and then the huge turbos are way to the left and go up (boost capacity) which doesnt really help us unless you run forged pistons and K1 rods. About 1.5 BAR (7psi boost) or 21 psi TOTAL pressure (1ATM + 7 psi) is a good stock motor boost level. I was told no PV mods needed until over 8 on a Holley 350/500 or 600 4bbl. I think the 225 flows at about 240 cfm at 5000 RPM so do your conversions to get the meters cubed
Check this site out, http://www.squirrelpf.com/turbocalc/ excellent calculator if you know the variables: They show your combo as a red line on all the different turbo maps, for instance the K26 looks a little small as I suspected.
then this one is almost perfect T04B H-3 , the horizontal line at the end is the wastegate limiting the boost.
and finally a Buick GN turbo (TB0348, that 300 Benz might have a TB0360) using our baseline figures of 350 HP, 3.7l , 12:1 AFM, BSFC .43 (?) 1.7 I/C loss (?) 5500 redline 5000 peak HP, 3800 max boost and 2500 min boost, all other things sortof auto-populated but you get the idea. If anyone has hard numbers for a 225, chime in.
