11-23-2004, 02:42 PM
I am: Boolean21
Join Date: Sep 2002
Total Props: 56
Traxxas big block conversion
Too much horsepower is just right! The Revo big block installation kit makes it easy to bolt primal big block engine torque into the high-tech Revo. Just imagine having the most suspension travel available in any monster truck, combined with the big block engine of your choice. No matter which big block you choose, Revo’s low center of gravity, lightweight, and efficient drivetrain means you’ll get the most performance out of every ounce of horsepower you put in. It’s a torque-hungry rock crawlers dream! This is a Genuine Traxxas™ kit so you can be sure that it will fit right and has been engineered and tested to the same rigorous standards as Revo. The big block installation kit includes all the components and hardware necessary for a factory engineered, quality installation. Suggested Retail Price: $55.00
I also found a few other pages with information
Revo Big block conversion kit mods
This is in reference to New Era models part # REV110, which
allows .21 to .28 big block motors on the Traxxas Revo.
There was a few additional items that I felt that needed to be changed on the Revo in order
for the Revo big block conversion kit to work smoother and to be more reliable.
1) The first item was to install a better throttle servo, with more torque,
which had at least 100oz of torque.
Basically a simple install.
2) The kit that comes with the New era models big block conversion kit
has a little extended post for the throttle which strips out real quick
and so I came up with a newer smoother reliable solution.
This picture seems the same, but is actually different. The picture above shows the new setup.
I had a problem with the extended post stripping out because you had the stock screw from
the top and an additional screw from the bottom and with the load of the servo on the
throttle arm it would strip out real quick. So I found a solution that is 100% reliable.
The first thing is that I wanted to use was one screw all the way through.
Obviously the stock screw isn't long enough, plus it was an awkward shaped screw too.
So I needed a piece to go in the center of the throttle piece to allow one long screw.
I happen to grab an Ofna shim kit that includes a cool spacer so I can use one screw
Not only do I get this nice piece that slides through the throttle but the kit also includes
several other shims for clutches, engine shafts and etc, which I can use on other mods.
Anyway I took out that top awkward shaped stock screw and also took out the screw
from the bottom. I then slid in this Ofna piece into the bottom of the throttle arm with
two bearings. I then took a 3mm x 28mm screw and pushed it all the way through the
new era models throttle aluminum custom part and then through the Ofna piece which
went through the Revo throttle piece and finally put a 3mm nut on the top.
Now I am done on that part. (see picture above for reference)
3) The next project was to get the throttle to work better since it was at a different angle
plus the throttle bar arm seemed a hair too short for it to work properly. The first
thing I did was switch the sides of the servos positioning and took out the stock
linkage rod and added an Ofna rod, but see below first.
As you notice the servos plastic 'saver' (not really a servo saver), I reversed it
from stock. I then grabbed an Ofna blue linkage kit #10724 and used
this rod instead of the stock rod as it was too short. I left the bar straight except
for the bends to go into the plastic throttle arm next to engine (in 1st top picture)
and then as you can see in the picture I used one blue stopper and one spring on the end.
Note, I did use a smaller spring that I had in my box, but you can use the Ofna one too.
Make sure to switch your throttle reversing and readjust trim, plus also you
will need to readjust your EPA if you have an aftermarket radio.
If you run this setup without the stock cover, then you are done.
BUT, if you want the cover on it then you will have to do some cutting
on the cover since this new setup of the linkage rod will hit it in many areas.
This isn't the prettiest dremel job as I did it in a rush at the track, but you will not
see all of these cuts when you put the cover on the truck. You should test out your
own dremel cuts as mine may be a bit different then your cuts but should be close.
You do not want the linkage rod to rub up against this piece at all.
That's it, and now you have a reliable and smooth linkage setup for the
New era models conversion kit for the big blocks.
Click here to see the original authors page
but essentially this is the kit from traxxas