F/S Benchmark 686 Race Motor
Throwing around the idea of building a SR1 car.... so...
This is a fully built Benchmark Performance 686 11:1 (pump gas) race/dune motor. Fresh build, hasnt even been run yet.
Bottom end just go the full treatment from Benchmark with a rebuilt/welded crank, new rod, middle gear support etc. 0 miles on build. Completely gone through.
Top end was ran for about 15 testing miles and 1 race (well, half a race anyway) on my stock bottom end and a milder cam. 8000 max RPM. I assembled the top end originally, and on the latest build. All Benchmark performance parts.
Brand new Benchmark custom grind cam and brand new DLC pin went in with the current build. Cylinder still had the cross hatching. Not a sign of detonation. Motor was always run at stock timing. Ran with 91 while testing, and 100 octane while racing since it was so hot. Motor has never been ran hot (190-195 max).
Currently has the CP 11:1 piston. Will run on pump gas (91). Big Benchmark Cam with slotted adjustable cam gear, chromoly cam gear pins, new timing chain and intake guide. Full head porting/valves etc by Benchmark. Cam will make peak power about 8400 depending on cam timing.
This was built as a super reliable motor. This is the same setup that Benchmark sells for racing and duning. It can be upgraded to race gas easily (higher comp piston).
I can sell it with any array of parts that you may need for short course/desert racing/ or duning. Options are Benchmark FCR 41 carb (nearly new, one race on it), HSR45 carb (maybe 15 hrs, needs tuning), PDM 4 puck Race clutch, Bronco Clutch (neither clutch tuned for this cam yet), customized Ron Woods exhaust, Pro Circuit duals, K&N intake, Custom UMP large canister filter, Programmable CDI, etc?
If you are interested please PM me. No low ballers please. If I dont sell it, Ill probably put it in my 4 seater. Depending on interest, I can either leave it unfired, or fire it up and break in the cam and tune the carb close so you can hear it run. Located in So Cal. Can deliver to Parker/Havasu AZ.