Re: NAG1 into an A body??
[Re: Joe12459]
#2183020
10/26/16 03:16 PM
10/26/16 03:16 PM
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Joined: Jan 2003
Posts: 16,376
dogdays
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,376
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Do keep in mind that a Hemi is about 100lb lighter than an LA motor.
Yes, the Mustang II front on fabricated rails should be pretty simple and direct, definitely another way to go. Run the new frame rails back to also act as chassis stiffeners.
The NAG1 is a 5-speed transmission with 3.59 First and 0.83 Fifth. It'd be best used with something like a 2.94 or no more than a 3.23 rear. Actually for driving around one might consider a 2.76 rear gear. This has one advantage in that, with lower numerical gears the pinion gets bigger and thus stronger.
My rule of thumb for street car standard transmissions is they need at least 10:1 combined gear ratio to start at a stop sign going uphill. 10 / 3.59 = 2.79. A 2.76 gear would work, too. Cruising speed is next. 235-75-15 tires need 698 revolutions for a mile. The driveshaft at 60 mph is turning 698 rpm. Multiply times the gear ratio to get transmission output shaft speed.
2.76 x 698 = 1928 rpm at 60. 1600 in OD 2134 OD at 80 2.94 x 698 = 2052 rpm at 60, 1703 in OD 2270 OD at 80 698 x 3.23 = 2255 rpm at 60, 1871 in OD 2494 OD at 80
Numbers I could live with.
R.
Last edited by dogdays; 10/27/16 03:26 PM.
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Re: NAG1 into an A body??
[Re: Prodart440]
#2183077
10/26/16 04:38 PM
10/26/16 04:38 PM
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Joined: Aug 2003
Posts: 851 Avondale AZ
Prodart440
OP
super stock
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OP
super stock
Joined: Aug 2003
Posts: 851
Avondale AZ
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So with my 3.91 gears, I'd be at 2300 RPM at 80 in OD??
Aaron
68 Roadrunner 383/AT 69 Dart GT Conv. 383/AT 05 Dodge Ram 4x4 Cummins 06 GoManGo R/T Daytona #757 68 Coronet 440
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Re: NAG1 into an A body??
[Re: Joe12459]
#2183308
10/26/16 10:04 PM
10/26/16 10:04 PM
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Joined: May 2003
Posts: 6,572 Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,572
Downtown Roebuck Ont
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Depending on tire size, you would be around 3000 RPM at 80mph in OD. At 2300 RPM you would be closer to 60 MPH, again depending on tire size. A NAG1 with 3.91's will be about the equivalent of a 1:1 with 3.23's. .83:1 OD X 3.91 = 3.245:1 final drive = 79.73 MPH @ 3100 RPM with a 28" tire. Kevin
Last edited by Twostick; 10/26/16 10:09 PM.
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Re: NAG1 into an A body??
[Re: cudaman1969]
#2183478
10/27/16 12:31 AM
10/27/16 12:31 AM
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Joined: Feb 2010
Posts: 18,493 Granite Bay CA
Kern Dog
Striving for excellence
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Striving for excellence
Joined: Feb 2010
Posts: 18,493
Granite Bay CA
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Look up a guy named Darious, not sure if that's spelled right, he did the whole swap in a RR but tunnels should be close between the two cars. Had quite a few headaches with that swap, especially the driveshaft hookup. Car Nag has a three wing flange but the Freightliner van uses a four wing so it can move up and down with the slip type u-joint. Darius did the swap in a 70 GTX. I'd suspect that the trans tunnel in the B body is bigger than any A body. He did also switch to an RMS setup and cut the torsion bar crossmember and floor to clear the transmission.
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Re: NAG1 into an A body??
[Re: DaytonaTurbo]
#2183487
10/27/16 12:34 AM
10/27/16 12:34 AM
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Joined: Nov 2003
Posts: 1,882 Pittsburgh,PA
RTSrunner
top fuel
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top fuel
Joined: Nov 2003
Posts: 1,882
Pittsburgh,PA
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So, does anyone make a replacement K-member that uses coilovers for the A body?
R.
Or you could cut off the front clip, lay down new frame rails and do a complete mustang ii type front suspension. I bet you'd shed a few pounds. PATC gives the complete instructions on how to make a three wire A518od trans work in place of a 727.It is a good swap. He doesn't want to cut and the 518 won't fit under a stock torsion bar crossmember. If he doesn't want to cut for a 518 trans,I'm betting that front clip is out of the question.
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Re: NAG1 into an A body??
[Re: Joe12459]
#2183548
10/27/16 02:10 AM
10/27/16 02:10 AM
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Joined: Jan 2004
Posts: 8,387 fredericksburg,va
cudaman1969
master
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master
Joined: Jan 2004
Posts: 8,387
fredericksburg,va
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Actually, the car 5.7 NAG1 uses the three bolt flange, the 6.1 and bigger uses the four bolt flange. I had a driveshaft made by The Driveshaft Shop that uses a CV joint in the front with an adapter to bolt to the three bolt flange on the tranny. They will make it to fit either three bolt or four, and the CV joint eliminates the need for a slip yoke, and makes it a lot more forgiving of driveshaft/pinion angles that may not be ideal. How does just a cv joint allow for the rear movement up and down from normal driving? When that rear drops away from the body, that driveshaft has to get longer, the reason for the slip joint in every non-independent suspension.
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Re: NAG1 into an A body??
[Re: Prodart440]
#2183671
10/27/16 11:45 AM
10/27/16 11:45 AM
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Joined: Aug 2015
Posts: 66 Catskill Mountains, NY
Joe12459
member
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member
Joined: Aug 2015
Posts: 66
Catskill Mountains, NY
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I have some pics of my build on Facebook, but I don't think I have a pic specifically of the driveshaft. If you go to www.thedriveshaftshop.com , they have all of the info. I called them and e-mailed them several times before buying it, and they were really good about explaining how it works.
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Re: NAG1 into an A body??
[Re: Joe12459]
#2183715
10/27/16 12:22 PM
10/27/16 12:22 PM
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Joined: Jan 2004
Posts: 8,387 fredericksburg,va
cudaman1969
master
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master
Joined: Jan 2004
Posts: 8,387
fredericksburg,va
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I have some pics of my build on Facebook, but I don't think I have a pic specifically of the driveshaft. If you go to www.thedriveshaftshop.com , they have all of the info. I called them and e-mailed them several times before buying it, and they were really good about explaining how it works. Ok, sounds good. Sounds like the old trunion joint from the early 60s cars.
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Re: NAG1 into an A body??
[Re: Joe12459]
#2183806
10/27/16 03:08 PM
10/27/16 03:08 PM
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Joined: May 2003
Posts: 6,572 Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,572
Downtown Roebuck Ont
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I have some pics of my build on Facebook, but I don't think I have a pic specifically of the driveshaft. If you go to www.thedriveshaftshop.com , they have all of the info. I called them and e-mailed them several times before buying it, and they were really good about explaining how it works. Your link seems to go to a page that doesn't do anything. Is this the page you meant to link? http://www.driveshaftshop.com/Kevin
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