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+--- Thread: Turbo Blade Size Help (/showthread.php?tid=1587)
Turbo Blade Size Help - jonbobshinigin - 08-07-2010
I could really use an overview on turbine wheel size! I need a practical example/explanation!
I have a chance to get an HY35, but this one has a 7 Blade, 78mm Compressor from an HX35. What will this give me in spool up time vs a regular HX35? Looks like I can get it for $250 or less.
I have an 87 300TDT w/stock turbo. Eventually I am shooting for 275-300HP.
RE: Turbo Blade Size Help - ForcedInduction - 08-07-2010
HY35 has a 9cm turbine housing vs 12cm. It will spool up much quicker and make the vehicle usable as a daily driver where the HX35 would return poor low end torque until 2500-3000rpm.
RE: Turbo Blade Size Help - jonbobshinigin - 08-07-2010
I have read a lot about back pressure with the HY35...would that apply to my setup and my goals of staying under 300HP? I plan on running a 3" straight pipe with this install...likely with a rearmost muffler. Once I get my pump tuned, will the HY35 hold me back from anything?
RE: Turbo Blade Size Help - ForcedInduction - 08-08-2010
(08-07-2010, 08:39 PM)jonbobshinigin I have read a lot about back pressure with the HY35...would that apply to my setup and my goals of staying under 300HP?
It will be plenty, and if anything it will be a little too big. In stock form on the Cummins it flows 738cfm to make 245hp, and it flows enough to support 300hp (1000cfm) on that engine with fuel modifications. If you were to run 35psi on the 603 with a decent intercooler you'll only be flowing 700cfm at 4800rpm.
RE: Turbo Blade Size Help - jonbobshinigin - 08-08-2010
Ok...you are saying that I'd only get 700cfm at 4800rpms with the HY35 @ 35 PSI? And I thought 35 PSI was too much for these?
What would be ideal? With HY35, Modified pump, intercooler...about where should this put me?
RE: Turbo Blade Size Help - ForcedInduction - 08-08-2010
(08-08-2010, 06:07 PM)jonbobshinigin And I thought 35 PSI was too much for these?To my understanding; not quite but on the edge.
Quote:What would be ideal? With HY35, Modified pump, intercooler...about where should this put me?As much as you want. Airflow and fuel are the first limits to power, engine internals and transmission are next. They are said to be good to 300hp with stock internals. But I bet thats with 1/4 runs, occasional track races and daily driving, I wouldn't take it into the mountain highways and expect it to hold together under continuous output.
RE: Turbo Blade Size Help - jonbobshinigin - 08-08-2010
I apologize for being less knowledgable...I have done a ton of reading but some things are not learned from anything but experience, which I still lack!
Once I have Turbo, IP Tuned, 3" Exhaust, and Intercooler...how would I regulate the power? By controlling the amount of boost pressure?
RE: Turbo Blade Size Help - ForcedInduction - 08-08-2010
(08-08-2010, 10:04 PM)jonbobshinigin Once I have Turbo, IP Tuned, 3" Exhaust, and Intercooler...how would I regulate the power? By controlling the amount of boost pressure?
Your right foot. Fuel is the only thing that controls power in a diesel.
RE: Turbo Blade Size Help - yankneck696 - 08-09-2010
(08-08-2010, 10:30 PM)ForcedInduction(08-08-2010, 10:04 PM)jonbobshinigin Once I have Turbo, IP Tuned, 3" Exhaust, and Intercooler...how would I regulate the power? By controlling the amount of boost pressure?
Your right foot. Fuel is the only thing that controls power in a diesel.
Forced is right. You just add air to burn the fuel. You intercool it to help keep the EGT's down. You can also do water or water meth ( no, not that meth ) to aid in cooling, add a bit of power & clean cylinders, heads & valves. Fuel delivery, timing of delivery & "speed" of delivery all are factors, too. If you have a week of free time, read everything on this wonderfully knowledgable forum & you will start wondering & then go to understanding, then be Knowledgable. Forced, feel free to correct any of my above statements "speed" especially, as I know there's an accepted term, but I'm still on the first cuppa joe.