Divey1130
RCTalk Rookie
I notice a lot of people always have questions about the "half tank lean" on the savage and I wanted to share with you what I did to resolve this problem. I myself had the same issue on my XL and hated to have to either run rich at the begining or keep filling up the tank. It's easy to do any of these but in my case I wanted to be able to drive with a whole tank and not worry about the leaing issue as well as longer run time. With the 250cc tank you get about 8-12 minutes more of run time (depending on driving conditions) versus the stock 160cc tank. I am aware that new era makes a tank for the half tank lean but now you just sacrificed your run time by a lot and that's what I did not want to do. So I will show you how to do a Ofna 250cc mid tank lean mod on a regular tvp. I have the XL but it is the same on the others. I have already posted this on a savage forum so I'll copy and paste here and update whats needed. I'm going to try to give as much detail as I can for future reference for other members so sorry if this is long.
Ofna Mid Tank Mod Parts:Ofna Fuel Tank 1/7 Scale OFN19504
Ofna 250cc Fuel Tank Mounts 87504
FLM Servo Mounts FLM46000
FLM Servo Plate FLM45500
RPM Receiver Box 80052
HPI Nitro Rush Bumper Set A349
HPI Shock Parts/ Rod End Set 85050
Robitronic Alum Servo Arm R17003
Ofna Linkage Sliders OFN10704
Ofna Linkage Kit OFN10724
Ofna Alum Servo Arm OFN 10733
The very first thing I had to do was make a platform out of pvc to work off of.
Now it's time for the build. I first started by mounting the servo plate.
Then I had to fugure a way out to mount the tank using the mounts made for that tank. This was the tricky part because the tank mounts were on the very front and back and when fitted on the plate it extended past any point to mount it. I used some 2mm alum and make some extensions to be able to mount the mounting post. I then bolted it down in existing holes in the servo plate. As you can see I had to notch the rear plate to fit in between the shock tower.
Then fitted the tank on the mounts and what a perfect fit it was.
Then I had to figure a way out to mount the steering servo. I tried various locations for it and ended up making a plate (2mm alum) for it so I could mount the servo mounts to. While I had this apart I put in bearings in place of the plastic bushing in the steering post. I then mounted the servo and tried to hook up the steering but noticed that the servo arm was to short. I was unaware of this so a trip to the hobby shop and picked up one. (This one was the only longest one they had) Then the darn link from the arm to the steering post was to short and I noticed that there was a lot a flex in it. So I used some shock rod ends and cut a long screw in half and whola, I had a stronger adjustable link. This setup worked great and I’m very happy with it. Here are some pictures of this.
Now time to relocate the throttle/brake servo. Again I made a plate and mounted the servo mounts with the servo. I was initially only going to make a plate for half of the way but then decided to go all the way just because the tvp was cut down on this side for the stock fuel tank. I left the whole piece more for protection and I liked the way it looked. I’m still waiting for the linkage and alum servo arm so that will be installed later. Here are a couple pictures.
Next page
Now time for the battery box and receiver box. Pretty easy on these. Drilled a hole in the center of both boxes and shock towers and mounted the boxes. The only thing I did not like was the battery box. The battery fit but it is a very tight fit. Barely had enough room to mount the on/off switch and the excess wire. Here are a couple pictures.
I still have some finishing up to do so I will post the final product when finished. Here are a couple things I added while doing the mod: Wheelie Bar
Big Joe’s mounted on Axial 8 Spoke
All new bearings entire truck
Hex screws entire truck
17mm hex hubs
Skid plate (waiting for FLM mounts)
Lowered shocks ¾” for stability plus 30wt front/rear
14 tooth CB for larger wheels
Bulletproof diffs front/rear with 30,000wt
FLM Motor mount
Here are some pictures of them.
This is what my work area looks like after a couple days.
Well I got the throttle/brake linkage together which took some thinking. What a pain in the butt that was to figure out. Apart then take apart and over and over until I got this. I am still waiting for the skid plate mounts and the alum servo arm for the t/b servo. Other than running the wires and fabbing a plate for the motor guard it should be done. Probaly by tomorrow I should be able to get it going and post a vid. Suggestions or comments and the linkage is welcome. Thanks for looking. Terry
Well finally got my mounts for the skid plate and my alum servo arm for the t/b servo. I am all done now. What a fun project it was. I think for christmas I will be getting the FLM tvp's and a couple other little things. The only thing left that I would want is a 2.4 radio and a new motor. But with my wife not working the motor will have to come in time. I will run the 5.9 til it blows. Here are the rest of the pictures finished.
Well that was all of it done with the stock tvp’s. Now here are a couple pictures with the FLM LCG tvp’s. I did change a couple things around as you can see in the pictures. Mine has changed by getting FLM LCG TVP's which make the 250cc ofna tank mod easier and the servo relocation easier because the tvp's are set up for this. And here is a picture of it now:
The first picture is the relocation of the reciever box using a rpm boc mounted on the side, the next picture is the relocation of the battery box using a hellfire battery box, the next picture is the relocation of the throttle/brake servo (hitech 5645mg) which has the ofna throttle/brake mod but with the execption of the throttle linkage is directly attached the the carb slide with no other linkages like in the normal one, it produes less drag and a super fast response even with that servo, the next picture is the ofna 250cc tank mounted, and the last picture is the relocation of the steering servo (hitech 5955tg) with a killer robtronic alum servo arm.
Now on these pictures is with the new tvps so mounting everything was alot easier. Anyone of you here can do the same thing if not better. You get nothing but good results from this mod. Longer runs times, no more tank leaning out, safer location for the gas tank, better throttle/brake setup, and a whole lot more. Any questions feel free to ask. It's a working progress and it's almost done. Thanks Terry
Here is a short video of the new throttle/brake linkage setup and what I did to eliminate the steering slop. I take no credit for idea on the steering mod as I found some info on this site. All I did diffrent was make a new alum plate and a single cam setup. Thanks for looking. Terry
Ofna Mid Tank Mod Parts:Ofna Fuel Tank 1/7 Scale OFN19504
Ofna 250cc Fuel Tank Mounts 87504
FLM Servo Mounts FLM46000
FLM Servo Plate FLM45500
RPM Receiver Box 80052
HPI Nitro Rush Bumper Set A349
HPI Shock Parts/ Rod End Set 85050
Robitronic Alum Servo Arm R17003
Ofna Linkage Sliders OFN10704
Ofna Linkage Kit OFN10724
Ofna Alum Servo Arm OFN 10733
The very first thing I had to do was make a platform out of pvc to work off of.
Now it's time for the build. I first started by mounting the servo plate.
Then I had to fugure a way out to mount the tank using the mounts made for that tank. This was the tricky part because the tank mounts were on the very front and back and when fitted on the plate it extended past any point to mount it. I used some 2mm alum and make some extensions to be able to mount the mounting post. I then bolted it down in existing holes in the servo plate. As you can see I had to notch the rear plate to fit in between the shock tower.
Then fitted the tank on the mounts and what a perfect fit it was.
Then I had to figure a way out to mount the steering servo. I tried various locations for it and ended up making a plate (2mm alum) for it so I could mount the servo mounts to. While I had this apart I put in bearings in place of the plastic bushing in the steering post. I then mounted the servo and tried to hook up the steering but noticed that the servo arm was to short. I was unaware of this so a trip to the hobby shop and picked up one. (This one was the only longest one they had) Then the darn link from the arm to the steering post was to short and I noticed that there was a lot a flex in it. So I used some shock rod ends and cut a long screw in half and whola, I had a stronger adjustable link. This setup worked great and I’m very happy with it. Here are some pictures of this.
Now time to relocate the throttle/brake servo. Again I made a plate and mounted the servo mounts with the servo. I was initially only going to make a plate for half of the way but then decided to go all the way just because the tvp was cut down on this side for the stock fuel tank. I left the whole piece more for protection and I liked the way it looked. I’m still waiting for the linkage and alum servo arm so that will be installed later. Here are a couple pictures.
Next page
Now time for the battery box and receiver box. Pretty easy on these. Drilled a hole in the center of both boxes and shock towers and mounted the boxes. The only thing I did not like was the battery box. The battery fit but it is a very tight fit. Barely had enough room to mount the on/off switch and the excess wire. Here are a couple pictures.
I still have some finishing up to do so I will post the final product when finished. Here are a couple things I added while doing the mod: Wheelie Bar
Big Joe’s mounted on Axial 8 Spoke
All new bearings entire truck
Hex screws entire truck
17mm hex hubs
Skid plate (waiting for FLM mounts)
Lowered shocks ¾” for stability plus 30wt front/rear
14 tooth CB for larger wheels
Bulletproof diffs front/rear with 30,000wt
FLM Motor mount
Here are some pictures of them.
This is what my work area looks like after a couple days.
Well I got the throttle/brake linkage together which took some thinking. What a pain in the butt that was to figure out. Apart then take apart and over and over until I got this. I am still waiting for the skid plate mounts and the alum servo arm for the t/b servo. Other than running the wires and fabbing a plate for the motor guard it should be done. Probaly by tomorrow I should be able to get it going and post a vid. Suggestions or comments and the linkage is welcome. Thanks for looking. Terry
Well finally got my mounts for the skid plate and my alum servo arm for the t/b servo. I am all done now. What a fun project it was. I think for christmas I will be getting the FLM tvp's and a couple other little things. The only thing left that I would want is a 2.4 radio and a new motor. But with my wife not working the motor will have to come in time. I will run the 5.9 til it blows. Here are the rest of the pictures finished.
Well that was all of it done with the stock tvp’s. Now here are a couple pictures with the FLM LCG tvp’s. I did change a couple things around as you can see in the pictures. Mine has changed by getting FLM LCG TVP's which make the 250cc ofna tank mod easier and the servo relocation easier because the tvp's are set up for this. And here is a picture of it now:
The first picture is the relocation of the reciever box using a rpm boc mounted on the side, the next picture is the relocation of the battery box using a hellfire battery box, the next picture is the relocation of the throttle/brake servo (hitech 5645mg) which has the ofna throttle/brake mod but with the execption of the throttle linkage is directly attached the the carb slide with no other linkages like in the normal one, it produes less drag and a super fast response even with that servo, the next picture is the ofna 250cc tank mounted, and the last picture is the relocation of the steering servo (hitech 5955tg) with a killer robtronic alum servo arm.
Now on these pictures is with the new tvps so mounting everything was alot easier. Anyone of you here can do the same thing if not better. You get nothing but good results from this mod. Longer runs times, no more tank leaning out, safer location for the gas tank, better throttle/brake setup, and a whole lot more. Any questions feel free to ask. It's a working progress and it's almost done. Thanks Terry
Here is a short video of the new throttle/brake linkage setup and what I did to eliminate the steering slop. I take no credit for idea on the steering mod as I found some info on this site. All I did diffrent was make a new alum plate and a single cam setup. Thanks for looking. Terry
Last edited by a moderator: