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As of 12/1/2021, a major update of the forum software was accomplished
Update: 4/20/2024: The Eagles email account at GoDaddy no longer works. I have set up a gmail account as a workaround: eaglesinternational.email@gmail.com (This link seems to work for my outlook email, but may not work for other email platforms. If it does not load, copy and paste the link in your platform.)
Registration is open to the public (*) and free from any cost or obligation. Please allow up to 36 hours for your application to be processed. If you have problems registering, please email me at: eaglesinternational.email@gmail.com
(*) spambots will be deleted -- only legitimate public applications will be processed.
Reminder: the "quick links" menu offers you the best navigation of this forum -- you need to be registered and logged in to see that menu.
Blower type
-
- Posts: 95
- Joined: Mon Nov 26, 2012 10:37 am
- Bus Model: 1981 Eagle Model 10
Blower type
What is the difference between a "large bearing" blower, and a "small bearing" blower. Does it make any difference in the installation of one or the other on a 8v71N?
Jim Cummings
1983 Model 10
8V71
Auto Trans
Tour Bus Conversion Ex-Senator Coach
http://www.thejimcummingsband.com" onclick="window.open(this.href);return false;
1983 Model 10
8V71
Auto Trans
Tour Bus Conversion Ex-Senator Coach
http://www.thejimcummingsband.com" onclick="window.open(this.href);return false;
- beltguy
- Site Admin
- Posts: 2668
- Joined: Wed Oct 08, 2008 4:39 am
- FMCA #: F246286
- Bus Model: 1985 Eagle 10 with Series 60 and Eaton AutoShift 10 speed transmission (SOLD)
- Location: Evergreen, CO
- Contact:
Re: Blower type
Jim, I had hoped that someone would have knowledge of the two bearing size blowers. I have not heard of different bearing sizes, so I decided to do a bit of research.
The research was fun for me, since I was the blower belt guy for Gates and have followed blower technology on gas/alcohol/nitro automotive engines.
As background, racers have adapted our beloved two stroke blowers to automotive engines to "supercharge" the engine. This gives huge power increases when done properly. For decades, the racers have adapted 4-71, 6-71, and 8-71 blowers for their engines (they don't use the 4V71 etc designation like we do). For the "big boys", the aftermarket has created 10-71 and 14-71 blowers with the same basic technology.
There is a ton of information about these "adapted" blowers on the internet. One fun site is: http://www.hotrod.com/articles/hrdp-130 ... 17-blower/
My research did not reveal different bearing sizes options. Part of the issue is that racers often use different aftermarket end plates. Here is a link to one blower parts list: http://www.alsblowers.com/theblowershop ... nents.html. From that list it appears that the front and rear bearings are different, but they don't seem to list different bearing sizes for one end.
Probably more that you wanted to know
Jim
The research was fun for me, since I was the blower belt guy for Gates and have followed blower technology on gas/alcohol/nitro automotive engines.
As background, racers have adapted our beloved two stroke blowers to automotive engines to "supercharge" the engine. This gives huge power increases when done properly. For decades, the racers have adapted 4-71, 6-71, and 8-71 blowers for their engines (they don't use the 4V71 etc designation like we do). For the "big boys", the aftermarket has created 10-71 and 14-71 blowers with the same basic technology.
There is a ton of information about these "adapted" blowers on the internet. One fun site is: http://www.hotrod.com/articles/hrdp-130 ... 17-blower/
My research did not reveal different bearing sizes options. Part of the issue is that racers often use different aftermarket end plates. Here is a link to one blower parts list: http://www.alsblowers.com/theblowershop ... nents.html. From that list it appears that the front and rear bearings are different, but they don't seem to list different bearing sizes for one end.
Probably more that you wanted to know
Jim
Jim Shepherd
Evergreen, CO
'85 Eagle 10 with Series 60 & Eaton AutoShift 10 speed transmission SOLD
2005 Dodge 2500 with 5.9 Cummins and 6 speed manual 2022 Sunset 28 foot trailer
Bus Project pages: http://beltguy.com/Bus_Project/busproject.htm
Blog: https://beltguy.com/Travelogue/
Email: eaglesinternational.email at gmail.com NOTE this email box is only for general correspondence related to the forum and not technical advice. Technical questions will not receive a response.
Evergreen, CO
'85 Eagle 10 with Series 60 & Eaton AutoShift 10 speed transmission SOLD
2005 Dodge 2500 with 5.9 Cummins and 6 speed manual 2022 Sunset 28 foot trailer
Bus Project pages: http://beltguy.com/Bus_Project/busproject.htm
Blog: https://beltguy.com/Travelogue/
Email: eaglesinternational.email at gmail.com NOTE this email box is only for general correspondence related to the forum and not technical advice. Technical questions will not receive a response.
- luvrbus
- Club Member
- Posts: 2981
- Joined: Mon Oct 13, 2008 12:50 pm
- FMCA #: F262917
- Bus Model: 05
Re: Blower type
Jim, you are ok with a small bearing blower on a 8v71/NA engine the larger bearing blowers came in to existence when the turbos got popular. Most small bearing blowers are 80% capacity and the big bearing blowers are 88 to 100% .
DD made 16 different blowers for the old 2 stroke.If you planning on raising the HP to 304 or 318 with 70 injectors go with the big bearing 100% blower.Lol if you need one I have a dozen or so
DD made 16 different blowers for the old 2 stroke.If you planning on raising the HP to 304 or 318 with 70 injectors go with the big bearing 100% blower.Lol if you need one I have a dozen or so
- beltguy
- Site Admin
- Posts: 2668
- Joined: Wed Oct 08, 2008 4:39 am
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- Bus Model: 1985 Eagle 10 with Series 60 and Eaton AutoShift 10 speed transmission (SOLD)
- Location: Evergreen, CO
- Contact:
Re: Blower type
Clifford, I knew you would have the answer.
Now the question is to how to identify the two blowers.
I have noted some blowers have what I call "single ribs" and others have "twin ribs" (see photos)
Can these ribs be used to identify the big and small bearing blowers?
Jim
Now the question is to how to identify the two blowers.
I have noted some blowers have what I call "single ribs" and others have "twin ribs" (see photos)
Can these ribs be used to identify the big and small bearing blowers?
Jim
Jim Shepherd
Evergreen, CO
'85 Eagle 10 with Series 60 & Eaton AutoShift 10 speed transmission SOLD
2005 Dodge 2500 with 5.9 Cummins and 6 speed manual 2022 Sunset 28 foot trailer
Bus Project pages: http://beltguy.com/Bus_Project/busproject.htm
Blog: https://beltguy.com/Travelogue/
Email: eaglesinternational.email at gmail.com NOTE this email box is only for general correspondence related to the forum and not technical advice. Technical questions will not receive a response.
Evergreen, CO
'85 Eagle 10 with Series 60 & Eaton AutoShift 10 speed transmission SOLD
2005 Dodge 2500 with 5.9 Cummins and 6 speed manual 2022 Sunset 28 foot trailer
Bus Project pages: http://beltguy.com/Bus_Project/busproject.htm
Blog: https://beltguy.com/Travelogue/
Email: eaglesinternational.email at gmail.com NOTE this email box is only for general correspondence related to the forum and not technical advice. Technical questions will not receive a response.
- luvrbus
- Club Member
- Posts: 2981
- Joined: Mon Oct 13, 2008 12:50 pm
- FMCA #: F262917
- Bus Model: 05
Re: Blower type
Jim, the single rib in the 1st photo is for the the inline 6-71 it bolts to the side of the block the twin rib blower is for 6v71 or 6v92 all twin ribs are for the V series.Only way to tell which blower a engine has it will have 4 numbers like 1692 stamped at the rear on the right hand corner looking from the front of the engine, the casting numbers don't mean much because you can change end plates and rotors and they have different gear ratios also the N/A engines are a higher speed gear ratio HTH
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- Posts: 95
- Joined: Mon Nov 26, 2012 10:37 am
- Bus Model: 1981 Eagle Model 10
Re: Blower type
Once again, Clifford and Jim.....you guys stepped up and gave a nice clear answer, with all the info I needed. Thank you so much.
After waiting a week or so, it didn't look like anyone had the answer to the Big and Small question....so I went hunting inside my huge, convoluted DD 71 Series Maintenance CD. Deep within it, in the Blower section, I found a one line statement, that said that SMALL bearing Blowers were used on the N model engine, and the LARGE Bearing Blowers were for the Turbo's. Exactly what Clifford said. Since I'm determined to tackle this myself, it's good to at least know what the heck the bearing size is.
Yes, Cliff, I may take you up on one of your blowers. But I'm going to dig into this thing in the next couple of weeks and see exactly whats going on. I'll let you know what happens.
Thanks again Clifford and Jim. It's so rare nowadays that someone makes an effort. It really is.
Best,
Jim
After waiting a week or so, it didn't look like anyone had the answer to the Big and Small question....so I went hunting inside my huge, convoluted DD 71 Series Maintenance CD. Deep within it, in the Blower section, I found a one line statement, that said that SMALL bearing Blowers were used on the N model engine, and the LARGE Bearing Blowers were for the Turbo's. Exactly what Clifford said. Since I'm determined to tackle this myself, it's good to at least know what the heck the bearing size is.
Yes, Cliff, I may take you up on one of your blowers. But I'm going to dig into this thing in the next couple of weeks and see exactly whats going on. I'll let you know what happens.
Thanks again Clifford and Jim. It's so rare nowadays that someone makes an effort. It really is.
Best,
Jim
Jim Cummings
1983 Model 10
8V71
Auto Trans
Tour Bus Conversion Ex-Senator Coach
http://www.thejimcummingsband.com" onclick="window.open(this.href);return false;
1983 Model 10
8V71
Auto Trans
Tour Bus Conversion Ex-Senator Coach
http://www.thejimcummingsband.com" onclick="window.open(this.href);return false;
- beltguy
- Site Admin
- Posts: 2668
- Joined: Wed Oct 08, 2008 4:39 am
- FMCA #: F246286
- Bus Model: 1985 Eagle 10 with Series 60 and Eaton AutoShift 10 speed transmission (SOLD)
- Location: Evergreen, CO
- Contact:
Re: Blower type
One of the benefits of this forum is that if your answer is not correct (mine was not), someone will get you straightened out
Jim
Jim
Jim Shepherd
Evergreen, CO
'85 Eagle 10 with Series 60 & Eaton AutoShift 10 speed transmission SOLD
2005 Dodge 2500 with 5.9 Cummins and 6 speed manual 2022 Sunset 28 foot trailer
Bus Project pages: http://beltguy.com/Bus_Project/busproject.htm
Blog: https://beltguy.com/Travelogue/
Email: eaglesinternational.email at gmail.com NOTE this email box is only for general correspondence related to the forum and not technical advice. Technical questions will not receive a response.
Evergreen, CO
'85 Eagle 10 with Series 60 & Eaton AutoShift 10 speed transmission SOLD
2005 Dodge 2500 with 5.9 Cummins and 6 speed manual 2022 Sunset 28 foot trailer
Bus Project pages: http://beltguy.com/Bus_Project/busproject.htm
Blog: https://beltguy.com/Travelogue/
Email: eaglesinternational.email at gmail.com NOTE this email box is only for general correspondence related to the forum and not technical advice. Technical questions will not receive a response.
- luvrbus
- Club Member
- Posts: 2981
- Joined: Mon Oct 13, 2008 12:50 pm
- FMCA #: F262917
- Bus Model: 05
Re: Blower type
If you ever need blower parts I buy from http://www.deanblowers.com he is about 1/2 the price of Detroit,he is a speed shop but knows DD blowers fwiw
- beltguy
- Site Admin
- Posts: 2668
- Joined: Wed Oct 08, 2008 4:39 am
- FMCA #: F246286
- Bus Model: 1985 Eagle 10 with Series 60 and Eaton AutoShift 10 speed transmission (SOLD)
- Location: Evergreen, CO
- Contact:
Re: Blower type
Sadly, I have all the parts to make a blown early Olds engine, but will probably not live long enough to get to that project. I even have quite bit of Cad/La Salle parts and transmissions including 3 or 4 floor shifts. I have two 50 Olds that need finishing.
Can you say really old school
Jim
Can you say really old school
Jim
Jim Shepherd
Evergreen, CO
'85 Eagle 10 with Series 60 & Eaton AutoShift 10 speed transmission SOLD
2005 Dodge 2500 with 5.9 Cummins and 6 speed manual 2022 Sunset 28 foot trailer
Bus Project pages: http://beltguy.com/Bus_Project/busproject.htm
Blog: https://beltguy.com/Travelogue/
Email: eaglesinternational.email at gmail.com NOTE this email box is only for general correspondence related to the forum and not technical advice. Technical questions will not receive a response.
Evergreen, CO
'85 Eagle 10 with Series 60 & Eaton AutoShift 10 speed transmission SOLD
2005 Dodge 2500 with 5.9 Cummins and 6 speed manual 2022 Sunset 28 foot trailer
Bus Project pages: http://beltguy.com/Bus_Project/busproject.htm
Blog: https://beltguy.com/Travelogue/
Email: eaglesinternational.email at gmail.com NOTE this email box is only for general correspondence related to the forum and not technical advice. Technical questions will not receive a response.
- luvrbus
- Club Member
- Posts: 2981
- Joined: Mon Oct 13, 2008 12:50 pm
- FMCA #: F262917
- Bus Model: 05
Re: Blower type
I know the feeling Jim no green bananas or tomatoes for me either