turbo question "hypothetical"
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From: Western Mass
turbo question "hypothetical"
First off I know its easiest to just buy a kit meant for our engine, and that is probably what i will end up doing but Blueoval have played around with this idea for months now and i figure i might as well just ask
i have a turbo setup off an eclipse (got it for free while working as an intern, yeah apparently they liked me that much, also how i picked up the nickname turbill), its either a garret t25 or Mitsubishi td05 I cant remember and its not in front of me.
Now our limited turbo knowledge tells us because its a turbo made for a smaller engine (2.0l) it would spool faster, and because it is wastegated it would not over spool.
Basically Blueoval and I thought with a custom set up with this turbo I'd save money because i got the turbo for free, it would build boost very fast, and because i dont want crazy boost numbers the small size wouldn't be an issue.
Again we are both turbo noobs, and are probably missing some serious detail but hey I'll never know without asking. So hypothetically would this turbo work on a 6.9
i have a turbo setup off an eclipse (got it for free while working as an intern, yeah apparently they liked me that much, also how i picked up the nickname turbill), its either a garret t25 or Mitsubishi td05 I cant remember and its not in front of me.
Now our limited turbo knowledge tells us because its a turbo made for a smaller engine (2.0l) it would spool faster, and because it is wastegated it would not over spool.
Basically Blueoval and I thought with a custom set up with this turbo I'd save money because i got the turbo for free, it would build boost very fast, and because i dont want crazy boost numbers the small size wouldn't be an issue.
Again we are both turbo noobs, and are probably missing some serious detail but hey I'll never know without asking. So hypothetically would this turbo work on a 6.9
Laughing Gas
Joined: Apr 2011
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From: London, KY
I'm pretty new to this stuff too but the more I read about it and study my engines, the more I think you can rig up just about anything. If you can figure out how to get it mounted up to your intake, I can't see any reason why it wouldn't work.
Posting Guru
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From: Terre Haute, IN
If it's designed for a 2L engine i would think efficiency would be a major problem.... the turbo would be way outside it's design range.
Now i know even less about turbos, this is just a WAG....
Now i know even less about turbos, this is just a WAG....
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From: Illinois
I just built a twin turbo kit for my mustang, and was thinking of making my own kit for my truck. It would definitely be easier just to buy a kit made for the idi.... that's what ill be doing someday.
Fleet Mechanic
Joined: Jun 2009
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From: CT
depends, the idi's don't rev high and those smaller motors can push the same amount of air at 7000 rpms as an idi would push at 3300. I'd suggest learning to read turbo compressor maps, do the calculations for what the idi needs for air, and the boost level you want. You want to keep the compressor in the efficiency map either too far right or too far left is bad.
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From: Western Mass
yeah Onus that what we were thinking with the higher RPM's i guess i would probably have to get more formal info and do the calculations I'm sure its nothing worst then the stuff i've been doing in mech engineering school.
I am probably going to just sell it but it's been something i've been wondering for a while
I am probably going to just sell it but it's been something i've been wondering for a while
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From: Western Mass
84 my understanding of what over spool is that the turbo spins faster then the bearings are design for, but wouldn't the wastegate let off the exhaust before overspool happened.
but then again the wastegate for such a small engine mayy be physically too small to let off enough exhaust to stop over boost
but then again the wastegate for such a small engine mayy be physically too small to let off enough exhaust to stop over boost
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From: Western Mass
just looked at the garret site and they have an excellent turbo "course" it covers ALOT for how brief it is, I'm still digesting and re-reading it but you guys should take a look its very handy and a great place to start for a custom turbo set up
also if you read the diesel tech part i havn't done the math but just at a glance it tells me my Mitsubishi turbo will never work safely
also if you read the diesel tech part i havn't done the math but just at a glance it tells me my Mitsubishi turbo will never work safely
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From: Western Mass
Yeah ok all my math knowledge and countless hours of engineering calcs dont matter there just isn't enough info on the web to do the calcs for this such as finding Brake Specific Fuel Consumption i got close but not close at all
Posting Guru
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From: Princeton MN
The overspooling is different then cavitating. When you cavitate that means the wheel is spinning so fast it can no longer pull in air, it sounds like someone is tapping your turbo with a hammer. My tractor did this with a shwietzer 3LD, and when it cavitates you are making zero boost. IMHO that turbo is going to be too small, think about compression ratios, the car is maybe 8.5:1 and your truck is 21:1, and twice the CID, there is alot more haet and thermal expantion of air in you diesel. It will spool low but at higher rpms that small exhaust housing is going to raise your EGT's quickly and even more so when it cavitates.
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From: Western Mass
yeah that makes sense the impeller would be spinning so fast it would cavitate and probably get damage similar to when a boats prop cavitates which is real bad.
That site also made to point that its houseing would be too small which means you'd have quick spool up but at high rpms your engine would have so much backpressure it would loose tons of power
That site also made to point that its houseing would be too small which means you'd have quick spool up but at high rpms your engine would have so much backpressure it would loose tons of power
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