Motor swap + more
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Re: Motor swap + more
An automatic trans is easier on the driveline and frame, too.
If you switch to Saginaw steering, be sure to add a support brace from the gear box over to the passenger side frame. Even on late CJ's, it's needed to help prevent the front of the frame from fatigue cracking.
If you switch to Saginaw steering, be sure to add a support brace from the gear box over to the passenger side frame. Even on late CJ's, it's needed to help prevent the front of the frame from fatigue cracking.
43 Ford GPW 92098
53 Dunbar Kapple M100
Sold: 61 CJ-5, 41 T207 WC-1 Dodge closed cab pickup
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53 Dunbar Kapple M100
Sold: 61 CJ-5, 41 T207 WC-1 Dodge closed cab pickup
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USMC Tanker (1811, 1812), 85-93
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- JIMN
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Re: Motor swap + more
Some folks here probably should not read the forum section called "Modifications". They know it will be painful for them, I guess they are masochist .
There is also not really a shortage of MB/GPW jeeps that have been brought back to original-like condition, so no need to worry about depriving anything from history.
Don't forget that later jeeps came equipped with a 225 Buick V6. Those fit well, are easier on your drivetrain parts and have a unique look to them.
I believe it would be worth the effort to find one. Check one out in a jeep before you do the Vortec.
It's your jeep, Enjoy it!
There is also not really a shortage of MB/GPW jeeps that have been brought back to original-like condition, so no need to worry about depriving anything from history.
Don't forget that later jeeps came equipped with a 225 Buick V6. Those fit well, are easier on your drivetrain parts and have a unique look to them.
I believe it would be worth the effort to find one. Check one out in a jeep before you do the Vortec.
It's your jeep, Enjoy it!
1941 Ford GP, 1944 Willys MB, 1943 Bantam T3
- lt.luke
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Re: Motor swap + more
The flathead Ford 8 has been stuffed in everything imaginable since they built them. There are multiple versions available from about 1936 - about 1952. They fit in a jeep engine bay pretty cleanly. If you go that route, use available aftermarket stuff to figure out which variant to look for as a base. The "60" is probably the best as the aftermarket was full of performance and rebuild stuff going back to when they were new. This is due to that engine being the basis of a racing class back in the day. I had a 1937 85HP (early 21 stud, IIRC) and had lots of trouble finding stuff for it.
Luke Sparks
MAJ (R), USA
GPW 12078 http://g503.com/forums/viewtopic.php?f=95&t=102532
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MAJ (R), USA
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- tamnalan
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Re: Motor swap + more
Jeff Petrowich did an outstanding job building "Bam Bam". His build thread is on the cj-2a forum: https://www.thecj2apage.com/forums/buil ... 28473.html
Another fellow on the cj-2a forum put a flathead V8 in a jeep. I think he used an 8ba engine but I'm not positive about that.
I think a great jeep engine would be a Ford ecoboost motor. Probably a 4-cylinder version out of a Ford Focus. I have a 3.5L V-6 ecoboost in an F-150 and love it. They're very torquey, low-rpm motors. The turbo would be a huge plus if you like wheeling at altitude, such as in the Rockies. The ecoboost would also have some advantages over a Kubota diesel, which is another popular jeep swap. The RPM band on the ecoboost is wider and running gas would be more logistically compatible with other offroad vehicles if you run out.
Another fellow on the cj-2a forum put a flathead V8 in a jeep. I think he used an 8ba engine but I'm not positive about that.
I think a great jeep engine would be a Ford ecoboost motor. Probably a 4-cylinder version out of a Ford Focus. I have a 3.5L V-6 ecoboost in an F-150 and love it. They're very torquey, low-rpm motors. The turbo would be a huge plus if you like wheeling at altitude, such as in the Rockies. The ecoboost would also have some advantages over a Kubota diesel, which is another popular jeep swap. The RPM band on the ecoboost is wider and running gas would be more logistically compatible with other offroad vehicles if you run out.
Alan W. Johnson
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MB, 201453, "Lt Bob"
MB, 1942, not stock
M-100, Sep 1951
MB-TD, Mar 2012
Ford 91C, 1939
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MB, 201453, "Lt Bob"
MB, 1942, not stock
M-100, Sep 1951
MB-TD, Mar 2012
Ford 91C, 1939
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Re: Motor swap + more
I just finished my GPW with a 24 stud Ford flathead v8. I had the idea for years, but never got to it until now.
Used a CJ3a boxed frame and driveline with a composit body from 1945.
On the outside you hardly can see the diverence, it's all original or looks like it.......until you start it.
If you look under the hood, I tried to make it look like it was build that way from the factory.
It drives very well with stock steering, brakes ect. And it's arround 100 hp
Will try to get a link to pictures or film later.
Gerben
Used a CJ3a boxed frame and driveline with a composit body from 1945.
On the outside you hardly can see the diverence, it's all original or looks like it.......until you start it.
If you look under the hood, I tried to make it look like it was build that way from the factory.
It drives very well with stock steering, brakes ect. And it's arround 100 hp
Will try to get a link to pictures or film later.
Gerben
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Re: Motor swap + more
Suggest you do some type of brake upgrade. Fitting a small remote hydrovac unit @ a very minimum.
John GIBBINS Member Institute of Automotive Mechanical Engineers [Ret], ASE Master Medium/Heavy Truck & Auto Technician USA -2002 Licensed Motor Mech NSW MVIC 49593 Current 2015
TO DIAGNOSE, TROUBLESHOOT OR FAULT FIND ANY AUTO SYSTEM....
Understand how system parts interact with one another. GOOD parts can then be established & the NOT GOOD problem/s part/s isolated for repair or replacement.
TO DIAGNOSE, TROUBLESHOOT OR FAULT FIND ANY AUTO SYSTEM....
Understand how system parts interact with one another. GOOD parts can then be established & the NOT GOOD problem/s part/s isolated for repair or replacement.
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Re: Motor swap + more
Please I would love to see it!Gerben Faber wrote: ↑Mon Nov 06, 2017 2:48 pmI just finished my GPW with a 24 stud Ford flathead v8. I had the idea for years, but never got to it until now.
Used a CJ3a boxed frame and driveline with a composit body from 1945.
On the outside you hardly can see the diverence, it's all original or looks like it.......until you start it.
If you look under the hood, I tried to make it look like it was build that way from the factory.
It drives very well with stock steering, brakes ect. And it's arround 100 hp
Will try to get a link to pictures or film later.
Gerben
Was it hard to fit in the compartment?
Jordan S.
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Re: Motor swap + more
Installing V-8's, etc., over torques the drive train components that were designed for 60HP. Studebaker 6's is more compatible.
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HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
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- lt.luke
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Re: Motor swap + more
Inline 6's are 2 holes longer than the factory motor and the transmissions are longer. Thanks for facilitating hacked up grilles and transmission tunnels in addition to butchered motor mounts. I bet the old flat head 8's fit in the space left behind by a go-devil and with a t-90, the jeep should handle the same exact 15-20 HP of the majority of the v-8's in question the same as the Stude 6's.
MOST flat-head 8's are under 100hp from the factory, depending on what motor is found. Some of them are at the same 60-hp that the go-devil provides, although the hot-Rod world has more availible for the 60's than the 85-100 hp variations, so it would be pretty easy to twist one up.
Luke Sparks
MAJ (R), USA
GPW 12078 http://g503.com/forums/viewtopic.php?f=95&t=102532
https://www.homesteadersfinest.com/
MAJ (R), USA
GPW 12078 http://g503.com/forums/viewtopic.php?f=95&t=102532
https://www.homesteadersfinest.com/
- JIMN
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Re: Motor swap + more
It is not how much power an engines has that affects the rest of the driveline. It is how you drive it.
1941 Ford GP, 1944 Willys MB, 1943 Bantam T3
- lt.luke
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Re: Motor swap + more
Very true
Luke Sparks
MAJ (R), USA
GPW 12078 http://g503.com/forums/viewtopic.php?f=95&t=102532
https://www.homesteadersfinest.com/
MAJ (R), USA
GPW 12078 http://g503.com/forums/viewtopic.php?f=95&t=102532
https://www.homesteadersfinest.com/
- Chuck Lutz
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Re: Motor swap + more
FLATHEAD?
Why stop there?
Either go with the "G503" or go balls to the wall....
I thought the chromed top bows/brackets were a nice nostalgic touch.
Why stop there?
Either go with the "G503" or go balls to the wall....
I thought the chromed top bows/brackets were a nice nostalgic touch.
Chuck Lutz
GPW 17963 4/24/42 Chester, PA. USA 20113473 (USA est./Tom W.)
Bantam T3-C 1947
GPW 17963 4/24/42 Chester, PA. USA 20113473 (USA est./Tom W.)
Bantam T3-C 1947
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Re: Motor swap + more
Here is a small film of the flathead v8 in my GPW.
Tried to let look like a swap from a Ford 3/4 or 3 ton truck or perhaps from a Brengun carrier.
Link:https://youtu.be/6ZAPhsaHogI
Tried to let look like a swap from a Ford 3/4 or 3 ton truck or perhaps from a Brengun carrier.
Link:https://youtu.be/6ZAPhsaHogI
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Re: Motor swap + more
Gerben,
A cool video, sounds great, looks pretty natural as well...beyond the L134,it is a great choice, well done.
A cool video, sounds great, looks pretty natural as well...beyond the L134,it is a great choice, well done.
Ralph
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