7.3 Turbo talk
- Thread starter Derek@Vision Diesel
- Start date
JDub
Active member
If it's using the K31 compressor wheel, it should flow around 1250-cfm, so it should be good for 550-600hp. The turbine side may hold it back some like HotRod said, drive pressure may be a bit high.
Derek@Vision Diesel
New member
No sure what the compressor wheel is, but it looks nasty! Its got some sweet design to it.
I was warned that it may surge a tiny little bit, but if back pressure is a problem im already ready to put a waste gate on it
JDub
Active member
Billet 72mm wheel? I'm sure it's the K31 compressor wheel.
Derek@Vision Diesel
New member
Yeah that is what it is. So you think with 250/200's and big oil i should be 550+?
JDub
Active member
Hard to say with that turbine section, but it should flow enough cfm to make it... We won't use that large of a compressor wheel in the S300 frame due to durability and surge issues, but it may work okay for you.
I built my engine back in 08 its now August of 2011 and I have yet to have to do anything to the truck except PMs.
Derek@Vision Diesel
New member
Okay well we will see what happens
02POWERSTROKE7.3
New member
Anyone running a HX40 on a 7.3? If so how do you like it?
V-Ref
Active member
Anxious to hear any updates or new info on the above....
juniort444e
New member
I run a 4202 with 250/200 and love it. It seems laggy but heard thats because of my current tunes. Getting new ones soon and then i will make a more educated guess on the lag then. A gtx 4202 would work well with those injectors.
I would love to do a diy twin setup, with something like a gt40xx with a gt45 or gt47. still learning before i jump head first into that project.
I would love to do a diy twin setup, with something like a gt40xx with a gt45 or gt47. still learning before i jump head first into that project.
Derek@Vision Diesel
New member
I ran a hx55 with my 250/200 and honestly it wasnt enough, bottom end wasnt there and up top it was smokey.
GTS motorsports (geoff) runs an hx35 on his truck and does 450 on fuel and 800 on the bottle with it, so a 40 is pretty decent sized and probably wouldnt be a bad option for a daily driver.
Well its installed and running flawlessly at the moment. here are some install pics:
My impressions:
Well ive only driven it a couple days and im currently ONLY running economy tunes that are pulled back a little bit, so the fueling is definitely not there yet. But i can say this, it spools quicker and flows LOTS more than the HX. In fact it runs 100% clean on a tune that used to be pretty smokey (my economy tune). It is also dead quiet, i cant hardly ever hear it.
I will be dyno'ing the truck on saturday so you'll have some video and hear what it can actually put down. Highest ive seen with current tuning is 35psi
Derek@Vision Diesel
New member
HotRod or someone thats a turbo wizard i got some questions....
Why cant a 72mm s300 running between 45-50psi, clear up 250/200s. I was told it flows 1350 cfm, it spools up great and pulls pretty strong. Back pressure is not an issue from what ive seen, stays under 60 on a 50psi run
But there is just flat out too much damn un burnt fuel, even in tunes that are pulled back. Ive tried 15-20 tunes and it seems like at WOT its still a black cloud and dyno'in less than it should!
Why cant a 72mm s300 running between 45-50psi, clear up 250/200s. I was told it flows 1350 cfm, it spools up great and pulls pretty strong. Back pressure is not an issue from what ive seen, stays under 60 on a 50psi run
But there is just flat out too much damn un burnt fuel, even in tunes that are pulled back. Ive tried 15-20 tunes and it seems like at WOT its still a black cloud and dyno'in less than it should!
Hotrodtractor
Moderator
You might be making 50psi of boost - but I bet that charger is out of its map - take a gander at the compressor map for it and see where you land - more than likely its just hot air and not good cold boost. The absolute BEST way to know for sure is to install a turbo tach and know exactly what RPM you are spinning it at. Personally - think the turbine wheel selection in an S300 is too small to do what your asking.
96stacked&smoken
New member
so what exactly can a d66 handle. its so cheap id like to run it but not if i have to go bigger not long after
Derek@Vision Diesel
New member
Okay well lets say im making 40psi and have it wastegated to keep it in its happy range, it still wont clean it up at lower boost levels.
You think its just flat out, plain and simple, not enough turbo?
What options does a guy have on a T4i mount for a turbo that will do what i need?
Id like 550+ on fuel, seems as though ive got everything in place to get there but its just not making it.
steele86
New member
what turbo do you have on your truck right now strokeorcroak
Derek@Vision Diesel
New member
also another thing, is the MAP going to be the same even though its been machined out to fit the 72mm billet wheel?
I could check out the specs of an s300, but not sure if it stays the same once you mess with wheel sizes and housing sizes
I could check out the specs of an s300, but not sure if it stays the same once you mess with wheel sizes and housing sizes
Derek@Vision Diesel
New member
S300 with a 72mm billet compressor wheel and 19cm exhaust housing and here is how it dyno'd.
Hotrodtractor
Moderator
You're not going to clean up 200% tips in a race tune with anything on the T4i footprint unless you also have a turbo in a bottle - or - a second turbo in front of it.
It won't clean up at lower boost levels? You mean like it still smokes at cruise? At take off? That is either a tuning or an injector issue. Whose sticks are you running anyway? What is your HPO pressure look like when its smoking? How about some AE with ICP, duty cycle, PW, mass fuel desired, and boost for the times when its smoking?
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