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Author Topic: Thinking about swapping out for a 8v71 and a 4speed....Thoughts  (Read 2272 times)
John316
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MCI 1995 DL3, DD S60, Allison B500.




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« on: April 01, 2013, 04:45:10 AM »

Not much else to add? Found a deal on 8v71 and a four speed. The tranny is supposedly in good shape, but the 8v71 would have to be rebuilt (came out of an old truck).

That would give us an opportunity to get rid of all of the electronics on our current S60 and b500 tranny. At that point we might look into running unfiltered straight veggie oil in in and used motor oil. Could save us a bundle on fuel.

Anything else we should consider?

Oh yes, I would consider putting Google Nose on it eventually http://www.google.com/landing/nose/ Might be pretty cool.

John
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MCI 1995 DL3. DD S60 with a Allison B500.
TedCalvert
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« Reply #1 on: April 01, 2013, 04:50:43 AM »

Nice day today, isn't it?  The 1st. of April!
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muldoonman
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« Reply #2 on: April 01, 2013, 05:23:55 AM »

Are the 8v71's and 8v92's much difference in size and weight?  If you gonna take that 60 out go with the gusto!
« Last Edit: April 01, 2013, 07:43:25 AM by muldoonman » Logged
robertglines1
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« Reply #3 on: April 01, 2013, 06:18:09 AM »

Wing to help traction! With all that extra power and low gear it would be a wheel spinner. Bob
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Bob@Judy  98 XLE prevost with 3 slides --Home done---last one! SW INdiana
chessie4905
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« Reply #4 on: April 01, 2013, 06:28:18 AM »

obviously, you have too much free time on your hands....go wax your coach.
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GMC h8h 649#028
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John316
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« Reply #5 on: April 01, 2013, 06:38:32 AM »

Actually, may not need to be rebuilt. Looks pretty good.
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MCI 1995 DL3. DD S60 with a Allison B500.
rv_safetyman
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« Reply #6 on: April 01, 2013, 06:44:09 AM »

 Grin
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Jim Shepherd
Evergreen, CO
’85 Eagle 10/Series 60/Eaton AutoShift 10 speed transmission
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Oonrahnjay
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« Reply #7 on: April 01, 2013, 06:58:13 AM »

  Actually, may not need to be rebuilt. Looks pretty good. 

    Just "minor finish issues" -- that'll buff out!
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Bruce H; Wallace (near Wilmington) NC
1976 Daimler (British) Double-Decker Bus; 34' long
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muldoonman
1991 Prevost 8V92TA
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« Reply #8 on: April 01, 2013, 07:10:19 AM »

I have a set of slicks for that puppy when you make the change. You'll need um when you drop the proverbial Hammer!
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John316
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« Reply #9 on: April 01, 2013, 07:22:20 AM »

Good points and thoughts all around. Bob, I like the wing idea. Probably be needed. Muld, let me know when I can come pickup your slicks, will need those for sure.

Thinking of painting it before install.....thinking silver.
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MCI 1995 DL3. DD S60 with a Allison B500.
TomC
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« Reply #10 on: April 01, 2013, 07:54:28 AM »

Put a good paint job on it and it should run just fine. Obviously this is from a GMC Astro since it has a GM air conditioning compressor on it and the low profile turbocharger. 8V-92 and 8V-71 are the same block and head external size. The only difference is the 8V-92 has a large vibration dampner on the front of the crankshaft (like a small flywheel) that keeps it from easily being installed in a V drive.

Yes changing to the 8V-71 will be one way of having a mechanical engine. It will also be a way to loose 2 or more mpg and about half the torque. If you change it out, let us know-we'll take you directly to the looney farm-and this from a person that has his birthday today. Good Luck, TomC
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Tom & Donna Christman. '77 AMGeneral 10240B; 8V-71TATAIC V730.
FloridaCliff
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« Reply #11 on: April 01, 2013, 08:29:54 AM »

John,

Why not come down to Florida and we can exchange our engine and trannies?

I know a lot of nay sayer's say you can't put a straight engine in a V-drive like my 4905, but I think I have it figured out for both of us

Since I am only 96" wide, I can modify the tranny service door to let it hang out a few feet.

Only folks who might complain are bicycle riders in the share lane, but I doubt they will make it to a phone... Tongue

Happy Birthday Tom.

Cliff
« Last Edit: April 01, 2013, 10:07:49 AM by FloridaCliff » Logged

1975 GMC  P8M4905A-1160    North Central Florida

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Len Silva
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« Reply #12 on: April 01, 2013, 09:23:28 AM »

I think it's a great idea and that you should go for it.  But do it today, cause tomorrow it will be a stupid idea.
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Hand Made Gifts

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morefire
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« Reply #13 on: April 01, 2013, 01:29:19 PM »

LOL  Love it!!   Nicely played OP Grin
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David G
Toronto, Ontario
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Cummins ISX-675HP!!
chessie4905
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« Reply #14 on: April 01, 2013, 03:22:11 PM »

That small ac compressor also means it might have come out of a GMC pickup. I think GEO Metros also used that combo with a larger turbo.
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GMC h8h 649#028
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John316
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« Reply #15 on: April 01, 2013, 07:27:16 PM »

LOL, fun thread. Had quite a few great chuckles myself. Florida Cliff caused me a real laugh ROFL. Just stick it out the side....good one.

Happy Birthday, Tom. Turning 79 today? Grin Very astute observations. It for sure had to come out of that Astro, no doubt about it.

Have fun you guys.

John
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MCI 1995 DL3. DD S60 with a Allison B500.
RickB
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« Reply #16 on: April 02, 2013, 06:49:22 AM »

John,

Take your meds...

You actually had me for about two minutes yesterday. Need to move the coffeemaker closer to the bedroom. Caffeine helps expose pranksters.

T'was funny, I'll give you that

Rick
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I will drive my Detroit hard... I will drive my Detroit hard.
John316
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« Reply #17 on: April 02, 2013, 07:20:54 AM »

Rick,

LOL, fun stuff. Actually, I could have probably switched with you, and you might have been okay with that.

John
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MCI 1995 DL3. DD S60 with a Allison B500.
Ed Hackenbruch
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« Reply #18 on: April 02, 2013, 11:19:59 AM »

I was thinking about swapping my 8v71 for a 4v71 so that my fuel usage would be cut in half. Grin
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1968 MCI 5A with 8V71 and Allison MT644 transmission.  Western USA
John316
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« Reply #19 on: April 02, 2013, 07:11:46 PM »

Now that is brilliant, Ed. Smart thinking. Whee, think of the possibilities. LOL
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MCI 1995 DL3. DD S60 with a Allison B500.
luvrbus
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« Reply #20 on: April 02, 2013, 08:36:56 PM »

When the center bore or the bull gear goes on the 60 series you may wish you had a 8v71 when DD gets through with you lol
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Dave5Cs
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1979 MCI MC5Cs 6V-71 HT-740 Allison, Roseville, CA




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« Reply #21 on: April 02, 2013, 09:30:36 PM »

So John remember we want lots of pictures! Grin
Do they make a 2V-71 because we were thinking of welding one to our 6V so we'd have a real motor that can actually move to coach. Grin Cool Shocked

Dave5Cs
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Mex-Busnut
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« Reply #22 on: April 02, 2013, 09:55:21 PM »

Since I am only 96" wide, I can modify the tranny service door to let it hang out a few feet.

Cliff
Uhhh... Florida Cliff:

I am only posting this because of my concern for your well-being.

With all due respect, my friend, If you are '96-inches wide', you might do wonders to your fuel economy by going on a radical diet. And letting your 96-inch-wide body hang out of the tranny service door might get you injured by those bike riders you are talking about.

And according to this sign, you are putting yourself in more danger than you think!

Just sayin.
 
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Dr. Steve, San Juan del Río, Querétaro, Mexico, North America, Planet Earth, Milky Way.
1981 Dina Olímpico (Flxible Flxliner clone), 6V92TA Detroit Diesel
Rockwell model RM135A 9-speed manual tranny.
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100 miles North West of Mexico City, Mexico. 6,800 feet altitude.
lvmci
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« Reply #23 on: April 03, 2013, 08:10:35 AM »

Isn't a 2V71 a harley motor? Ha! Lvmci...
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Mci 102C3 8V92, Allison 4 speed 740
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FloridaCliff
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« Reply #24 on: April 03, 2013, 04:47:40 PM »

Uhhh... Florida Cliff:

I am only posting this because of my concern for your well-being.

With all due respect, my friend, If you are '96-inches wide', you might do wonders to your fuel economy by going on a radical diet. And letting your 96-inch-wide body hang out of the tranny service door might get you injured by those bike riders you are talking about.

And according to this sign, you are putting yourself in more danger than you think!

Just sayin.
 

Hey Budd,

My Doctor said as long as my waist is in a multiple of 5, I am OK.

So 96" is just fine.

By the way, who has ever seen an overweight bus driver? Yeah I thought so.... I rest my case.....

Cliff
« Last Edit: April 03, 2013, 04:50:33 PM by FloridaCliff » Logged

1975 GMC  P8M4905A-1160    North Central Florida

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Seangie
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« Reply #25 on: April 04, 2013, 05:10:04 AM »

Ooops...wrong thread....or not....

-Sean
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MysteryBus
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« Reply #26 on: April 04, 2013, 06:44:24 AM »

I was thinking on do that to mine, Oh wait I already got that! Wink
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lvmci
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« Reply #27 on: April 04, 2013, 07:19:46 AM »

One of these days, to the moon! Jackie gleason the bus driver...
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Mci 102C3 8V92, Allison 4 speed 740
Formally MCI5A 8V71 Allison MT643
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