The IDI turbocharger thread...
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Postmaster
Joined: Dec 2004
Posts: 2,941
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From: Maple Valley, WA
Well the IDI aftermarket is only as good as a brain.... so I am trying my best.... Whether that turns into a heap of scrap or a miracle, its all in the crystal ball's hands now...
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Joined: May 2013
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I posted a thread with this link in the turbo & supercharger forum, but I thought I'd post it here as well. I hope you all find this useful.
Turbo Sizing Calculator
Turbo Sizing Calculator
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Postmaster
Joined: Dec 2004
Posts: 2,941
Likes: 30
From: Maple Valley, WA
I had a customer this week ask me about some fueling mods, and he stated as if it was a known fact that the Factory 093 is just blowing hot air above 12 psi, so he really didn't need fuel above that.
It piqued my interest, so I ran some calc's and mapped the 093 for 18psi just to see where it would end up, and this was what I got.
As you can see, even at 18psi at around Torque and HP peaks, the factory turbo is still plenty efficient, and this is on a 7.3. There would even be a bit more fudge room on a 6.9.
By these calculations, I would say its pretty certain that the factory turbo is plenty efficient all the way to 20psi, not the numbers that we've always heard, 12 or 15psi.
Now I am a firm believer that the Stg3 exhaust wheel is the biggest restriction in the setup, and if we simply even upgraded to the P-trim, it would uncork this engine far better. Just need to step up and do it.
It piqued my interest, so I ran some calc's and mapped the 093 for 18psi just to see where it would end up, and this was what I got.
As you can see, even at 18psi at around Torque and HP peaks, the factory turbo is still plenty efficient, and this is on a 7.3. There would even be a bit more fudge room on a 6.9.
By these calculations, I would say its pretty certain that the factory turbo is plenty efficient all the way to 20psi, not the numbers that we've always heard, 12 or 15psi.
Now I am a firm believer that the Stg3 exhaust wheel is the biggest restriction in the setup, and if we simply even upgraded to the P-trim, it would uncork this engine far better. Just need to step up and do it.
Senior User
Joined: Nov 2003
Posts: 298
Likes: 0
From: Saint Maries Idaho
Has anyone tried running an B/W S-360? I don't know much about turbos but I was thinking this may be a good choice for a stock to mild build. http://www.ebay.com/itm/BorgWarner-Airwerks-S300SX3-60-S360-S300-88-A-R-Open-Scroll-Turbo-90-/300941698563?pt=Motors_Car_Truck_Parts_Accessories&hash=item461185e603&vxp=mtr
Any input?
Any input?
Posting Guru
Joined: Sep 2011
Posts: 1,523
Likes: 5
I had a customer this week ask me about some fueling mods, and he stated as if it was a known fact that the Factory 093 is just blowing hot air above 12 psi, so he really didn't need fuel above that.
It piqued my interest, so I ran some calc's and mapped the 093 for 18psi just to see where it would end up, and this was what I got.
As you can see, even at 18psi at around Torque and HP peaks, the factory turbo is still plenty efficient, and this is on a 7.3. There would even be a bit more fudge room on a 6.9.
By these calculations, I would say its pretty certain that the factory turbo is plenty efficient all the way to 20psi, not the numbers that we've always heard, 12 or 15psi.
Now I am a firm believer that the Stg3 exhaust wheel is the biggest restriction in the setup, and if we simply even upgraded to the P-trim, it would uncork this engine far better. Just need to step up and do it.
It piqued my interest, so I ran some calc's and mapped the 093 for 18psi just to see where it would end up, and this was what I got.
As you can see, even at 18psi at around Torque and HP peaks, the factory turbo is still plenty efficient, and this is on a 7.3. There would even be a bit more fudge room on a 6.9.
By these calculations, I would say its pretty certain that the factory turbo is plenty efficient all the way to 20psi, not the numbers that we've always heard, 12 or 15psi.
Now I am a firm believer that the Stg3 exhaust wheel is the biggest restriction in the setup, and if we simply even upgraded to the P-trim, it would uncork this engine far better. Just need to step up and do it.
I have always thought that from what I have ever seen with people pushing slightly higher boost numbers out of the 093. Even with the stock turbine housing mine pulled decently up past 15psi... Thanks for the info!
Posting Guru
Joined: Sep 2011
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Has anyone tried running an B/W S-360? I don't know much about turbos but I was thinking this may be a good choice for a stock to mild build. Borgwarner Airwerks S300SX3 60 S360 S300 88 A R Open Scroll Turbo 90 | eBay
Any input?
Any input?
Posting Guru
Joined: Sep 2011
Posts: 1,523
Likes: 5
In all actuality, you should be able to get a true BW turbo for that price. Look on some of the Cummins forums. I see a lot of S300 based turbos on there all the time. You can also google and find new ones pretty easily.
Postmaster
Joined: Aug 2010
Posts: 2,554
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From: Northern Arizona
NMB2 is setting me up with one right now... Although it will have a custom .85 AR exhaust housing. It should be slightly better than the A3000, and a very good turbo to run for a medium build. I will be running it with an RD2 110 pump. Pics and build thread with all the details will be posted when the parts come in. I am very excited about this turbo option.
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Senior User
Joined: Nov 2003
Posts: 298
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From: Saint Maries Idaho
NMB2 is setting me up with one right now... Although it will have a custom .85 AR exhaust housing. It should be slightly better than the A3000, and a very good turbo to run for a medium build. I will be running it with an RD2 110 pump. Pics and build thread with all the details will be posted when the parts come in. I am very excited about this turbo option.
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Postmaster
Joined: Dec 2004
Posts: 2,941
Likes: 30
From: Maple Valley, WA
The configuration is funky though... I wouldn't run the 60 wheel with the .88 exhaust housing, and the axial outlet makes it even more undesirable...
The S360 also comes with the .91 divided exhaust housing, as well as a standard outlet compressor housing... This is the turbo Id like to see go on my turbo kits for the DB2 guys... I think it would be a great performer.
Thread Starter
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Postmaster
Joined: Dec 2004
Posts: 2,941
Likes: 30
From: Maple Valley, WA
NMB2 is setting me up with one right now... Although it will have a custom .85 AR exhaust housing. It should be slightly better than the A3000, and a very good turbo to run for a medium build. I will be running it with an RD2 110 pump. Pics and build thread with all the details will be posted when the parts come in. I am very excited about this turbo option.
Thread Starter
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Postmaster
Joined: Dec 2004
Posts: 2,941
Likes: 30
From: Maple Valley, WA
http://www.ebay.com/itm/NEW-Borg-Warner-Turbo-S300SX3-60-91A-R-T4-Airwerks-Billet-177272-/251451505999?pt=Motors_Car_Truck_Parts_Accessories&hash=item3a8bad7d4f&vxp=mtr
This is the correct box unit S360, for the cheapest I have seen yet...
This is the correct box unit S360, for the cheapest I have seen yet...
Postmaster
Joined: Aug 2010
Posts: 2,554
Likes: 7
From: Northern Arizona
I think your going to have an excellent Turbo Jonathan... I believe this is the same compressor wheel as the A3K, with a slight (if any) difference in machining of the inducer. But even better, is this turbo has the 68mm exhaust wheel, which works better for lower RPM bigger displacement engines... The only downfall of the box unit (the above turbo) is the larger T4 exhaust housing... Your fixing that by going with the .85 S200 housing, which did great on the A3K (And should do even better on the 68 wheel)... I think you are going to have a very capable, responsive turbo based on my experience with the A3K on both a 90cc and 190cc pump...
According to NMB2, the Borg Warner ETT wheel on the S360 is American made, and not the same as the Chinese 59mm wheel from BEP that is used in the Aurora. You have pics of the A3000 wheel with your calipers on it... when I get a chance to see my turbo I will pop the compressor housing off and do the same. I got an e-mail from my dad, he said the BW box showed up at his house today... Awesome! Get that turbo kit into production man! JK, I have a whole truck to build... It's literally in pieces scattered around the yard right now...
