Flathead Engine to Shovelhead Frame
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Joined: Oct 2007
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Flathead Engine to Shovelhead Frame
Hello All,
I'm new to the Flathead section but not this forum. \\; I have a few post in the Shovelhead section. \\; I have a question/concern. \\; I have a 1938 UL engine that I want to mount on my 1983 Shovelhead frame. What adjustment if any do I need to make to the bottom and/or top motormounts? \\; This is my next project and I mentally gearing myself for the fun I'm going to endure. \\; LOL. \\; All information is greatly appreciated.
Thanks \\;
[IMG]local://upfiles/44527/4762DC779B064642B4F6F4A1AF08250F.jpg[/IMG]
[IMG]local://upfiles/44527/3091D4A1F3DF47E7BF2B50254C85F944.jpg[/IMG]
I'm new to the Flathead section but not this forum. \\; I have a few post in the Shovelhead section. \\; I have a question/concern. \\; I have a 1938 UL engine that I want to mount on my 1983 Shovelhead frame. What adjustment if any do I need to make to the bottom and/or top motormounts? \\; This is my next project and I mentally gearing myself for the fun I'm going to endure. \\; LOL. \\; All information is greatly appreciated.
Thanks \\;
[IMG]local://upfiles/44527/4762DC779B064642B4F6F4A1AF08250F.jpg[/IMG]
[IMG]local://upfiles/44527/3091D4A1F3DF47E7BF2B50254C85F944.jpg[/IMG]
Road Warrior
Joined: Mar 2011
Posts: 1,378
Likes: 2
From: Macon, GA USA
To put a big flat head motor in a pan or shovel frame you need a spacer under the front motor mount. If you look in the early pan spare parts manual you will see they show a spacer which is for U models since you could get a U model special ordered up to 1952. With out this spacer you take a chance in breaking the cases. Some thing goes if you put a knuckle in a shovel or pan frame.
I know this is a old thread but thought I would include this in hopes it might same someone some problems.
I know this is a old thread but thought I would include this in hopes it might same someone some problems.
Intermediate
Joined: Nov 2007
Posts: 49
Likes: 1
From: new mexico
To put a big flat head motor in a pan or shovel frame you need a spacer under the front motor mount. If you look in the early pan spare parts manual you will see they show a spacer which is for U models since you could get a U model special ordered up to 1952. With out this spacer you take a chance in breaking the cases. Some thing goes if you put a knuckle in a shovel or pan frame.
I know this is a old thread but thought I would include this in hopes it might same someone some problems.
I know this is a old thread but thought I would include this in hopes it might same someone some problems.
Thanks for the reply, That helps, I knew the top motor mount would not fit. I'm still messing around with the 40ULH, I think it will work fine, I'm using a late model 5 speed with electric start. The primary drive will be a belt drive. There is a big flattie on U-Tube, it runs strong and sound great. I have to listen to it every few days.
Intermediate
Joined: Nov 2007
Posts: 49
Likes: 1
From: new mexico
Hello All,
I'm new to the Flathead section but not this forum. \\; I have a few post in the Shovelhead section. \\; I have a question/concern. \\; I have a 1938 UL engine that I want to mount on my 1983 Shovelhead frame. What adjustment if any do I need to make to the bottom and/or top motormounts? \\; This is my next project and I mentally gearing myself for the fun I'm going to endure. \\; LOL. \\; All information is greatly appreciated.
Thanks \\;
[IMG]local://upfiles/44527/4762DC779B064642B4F6F4A1AF08250F.jpg[/IMG]
[IMG]local://upfiles/44527/3091D4A1F3DF47E7BF2B50254C85F944.jpg[/IMG]
I'm new to the Flathead section but not this forum. \\; I have a few post in the Shovelhead section. \\; I have a question/concern. \\; I have a 1938 UL engine that I want to mount on my 1983 Shovelhead frame. What adjustment if any do I need to make to the bottom and/or top motormounts? \\; This is my next project and I mentally gearing myself for the fun I'm going to endure. \\; LOL. \\; All information is greatly appreciated.
Thanks \\;
[IMG]local://upfiles/44527/4762DC779B064642B4F6F4A1AF08250F.jpg[/IMG]
[IMG]local://upfiles/44527/3091D4A1F3DF47E7BF2B50254C85F944.jpg[/IMG]
Novice
Joined: Jun 2010
Posts: 18
Likes: 0
From: Maryland
Flathead engine
Fiveola: Hope you are still tracking this thread. Several years ago I built a Bobber based on a 1942 U motor. I had Paul Friebus, www.americancyclefab.com, re-engineer the motor and now it's an 84" stroker that will run Interstate speeds with no problem. Since I'm an old guy, I wasn't about to kick an 84 incher so I rigged up an electric start system. It is based on a unit built by Tech Cycle for Panheads. I had to use a primo belt primary with a Pro-clutch package and it required some extensive fabrication on the inner primary. If you ever decide to go with electric start, contact me and I will give you some pointers. Be sure to check out the ACF website and watch the Bonneville videos, it will give you "Flathead Fever" ACF holds the Flathead Land Speed Record at Bonneville and the World Finals. If your motor ever needs rebuilding, check with Paul, he is the Flathead Guru. Hope you are enjoying your ride by now.
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From: ROWLEY MA
40 ulh in a softail
Thanks for the reply, That helps, I knew the top motor mount would not fit. I'm still messing around with the 40ULH, I think it will work fine, I'm using a late model 5 speed with electric start. The primary drive will be a belt drive. There is a big flattie on U-Tube, it runs strong and sound great. I have to listen to it every few days.
I'M DEVELOPING THE PARTS TO PUT A 1940 ULH IN A SOFTAIL FRAME WITH A 5 SPEED , WITH ENCLOSED 5 SPEED PRIMARY ,,,,,,, WHEN V-TWIN COMES OUT WITH THE ULH ENGINE , ALL THIS WILL BE A POPULAR BUILD
THE CUSTOME PARTS CONSIST OF AN ALUMINUM ENGINE CASE ADAPTOR PLATE , AND AN OFF SET CRANK SPROCKET , ALLMOST THERE ,,,,,,,,, STAY TUNED !!!!!!!!!!! BRIAN QUINN FROM ROWLEY MASS , HQTRQD@COMCAST.NET
