140 Airpower- Fuel Efficiency is not an issue, In Tractor Pulling you just make a short run at WOT. Like Drag Racing, you need not concern yourself with how much fuel it takes.
Pat, No it is not even firing, the rods share a crankpin.
TMoose, It uses a Cub Cadet standard transmission, but it has been modified a bit. 7 1/4" Automotive differential and axles from the same automotive rearend, cut down and re-splined. Aftermarket gears to provide more useable gear ratios...
Thanks Pat.
What would you recommend on the exhaust side? Should we tie them 2-1 and add some length, or should they be kept separate ? How much longer would you recommend?
Tmoose- The stock intake manifold must be used. We have added considerably longer runners in the form of an "Adapter" which is legal. Exhaust can be whatever you want. We run 1 1/4" tubes. 18" long, separated all the way. No $$ for dyno time to prove that these theorys work well together.
Just looked at some more factory specs, and realised that I have one other Small Block option. I could use a 3.05" bore and 2.6" stroke.
I guess what I want to know is... all other things being equal, which configuration would be a better option? Bear in mind that my RPM is not limited by the...
Unfortunately I cannt provide any flow info right now.
As far as Rod/Stroke ratio, I can buy pistons with a high pin and increase rod length up to the limits of deck height, but I do not know the deck height of the big blocks, as I do not own a block yet. I need to decide if that is the road I...
Thanks for the responses.
Yes TMOOSE, it is governed at 4500rpm so it will under no circumstances see more that say 4600 (if the gov is overcorrecting) and never more than 4500 under load.
This is the main reason I am considering this long stroke. I wonder if it will make more torque at this...
I am looking for advice and I have obviously come to the right place..
The engine we are going to build is for a Pulling Garden Tractor. I have two roads I can go down, the Small Block or the Big Block Briggs & Stratton Vanguard V-Twin Engine.
Rules include; 38 cubic inch, 4500PRM Governor...
