Building a rig for KOH has gotten to the point where even a budget stock class or modified class rig is in the 50 plus grand range to be close to competitive.
I got to thinking about how you could create a set of rules that would be very budget minded (under 20,000), allows you to run a buggy or full bodied rig, creates equally capable rigs, and is easily techable.
Here's what I came up with. I have them written up in a little more "official" format but here's the cliff notes.
-TBI 4.3, factory block/ heads, TBI injection only, factory computer with tune, factory intake and exhaust manifolds, maximum .30 over bore, factory computer, no roller rockers or titanimum valves
-700R4, th350, s10 5 speed, toyota 5 speed (maybe limit which yota tranny, I'm not a yota guy), internals open
-Jeep or Chevy 231 with sye or stock geared Toyota t-case, no twin sticks or disconects, no doublers or low gear kits
-Front Dana 44 or Toyota pickup front axle, factory housing/ center section/ 3rd memeber only, factory knuckles, yota must remain yota width
-Rear low pinion Dana 44/ Ford 9" or IFS Toyota rear, factory housing/ center section/ 3rd member only, must remain factory width/ axle tubes, no full floaters, no selectable lockers, max 31 splines
-Maximum 52" long leaf springs with 2.0x14" 5/8" shaft remote resi shocks, no air bumps, single non fancy shackles per corner, spring under or over, traction bar ok
-Hydro assist steering with a steering box, tie rod and drag link
-35"x14.5"R15 DOT Tires on steel wheels, beadlocks ok
-Maximum 26 Gallon fuel cell
-body & chassis open, may be based on a factory production chassis or full custom tube chassis
-Wheel base open
-Must meet current KOH safety rules
The idea is to have a mostly junk yard drive train, parts that are easy to find used, and capable enough to finish the EMC course. Motor, shock size/ spring length, transmission/ t-case, and tire size should keep rigs similar in capability no matter the dollar amount. Getting rid of body/ wheel base limits will allow a lot of trail rigs that are all ready built to fit the class without major mods besides safety gear. The limited motor should make the parts live a season and everyone equal power wise.
I haven't added up all the numbers but I'm thinking 10-20 grand would be a competitive rig.
Thoughts?
I got to thinking about how you could create a set of rules that would be very budget minded (under 20,000), allows you to run a buggy or full bodied rig, creates equally capable rigs, and is easily techable.
Here's what I came up with. I have them written up in a little more "official" format but here's the cliff notes.
-TBI 4.3, factory block/ heads, TBI injection only, factory computer with tune, factory intake and exhaust manifolds, maximum .30 over bore, factory computer, no roller rockers or titanimum valves
-700R4, th350, s10 5 speed, toyota 5 speed (maybe limit which yota tranny, I'm not a yota guy), internals open
-Jeep or Chevy 231 with sye or stock geared Toyota t-case, no twin sticks or disconects, no doublers or low gear kits
-Front Dana 44 or Toyota pickup front axle, factory housing/ center section/ 3rd memeber only, factory knuckles, yota must remain yota width
-Rear low pinion Dana 44/ Ford 9" or IFS Toyota rear, factory housing/ center section/ 3rd member only, must remain factory width/ axle tubes, no full floaters, no selectable lockers, max 31 splines
-Maximum 52" long leaf springs with 2.0x14" 5/8" shaft remote resi shocks, no air bumps, single non fancy shackles per corner, spring under or over, traction bar ok
-Hydro assist steering with a steering box, tie rod and drag link
-35"x14.5"R15 DOT Tires on steel wheels, beadlocks ok
-Maximum 26 Gallon fuel cell
-body & chassis open, may be based on a factory production chassis or full custom tube chassis
-Wheel base open
-Must meet current KOH safety rules
The idea is to have a mostly junk yard drive train, parts that are easy to find used, and capable enough to finish the EMC course. Motor, shock size/ spring length, transmission/ t-case, and tire size should keep rigs similar in capability no matter the dollar amount. Getting rid of body/ wheel base limits will allow a lot of trail rigs that are all ready built to fit the class without major mods besides safety gear. The limited motor should make the parts live a season and everyone equal power wise.
I haven't added up all the numbers but I'm thinking 10-20 grand would be a competitive rig.
Thoughts?