Troubleshooting Advice on overheating with new stoker
Posted: July 8th, 2019, 4:05 pm
Stroker experts,
Do any of you have sage advice for troubleshooting overheating on a new stroker build. The stroker was build with 1998 block and BnB parts from Russ P. Including pistons, rods, crank, ported head, cam shaft, port matched intake, with .030 over on the cylinders, and a .010 deck on the block for a stated compression of about 9.3. The builder used a racing head gasket with stainless steel layers at stock thickness that matched the .030 over bore. The exhaust is Banks headers with a full two inch down tube to a cat back banks exhaust. The computer is stock. The cat is out of the Jeep while I break in the engine.
I have new parts including: mishimoto aluminum radiator, silicone hoses, flow cooler water pump, new thermostat and housing, new heavy duty fan clutch. Ac condenser, and a plate transmission oil cooler mounted on the passenger side in front of the mechanical fan. The electrical fan is working and pulling decent amounts of air. I have a new temp sensing gage that is working and giving realistic readings. Jeep is on 35” tires with 4.56 gears, and now which or airflow obstructions.
I have driven it about 200 miles after the build and I know it is hot in Phoenix right now, but I am fearful to take my eyes off the temp gage. A couple of times it has gotten into the 240 degree range and flashed the engine light before I turned the cab heater on to cool it back down. Without the AC running and keeping steady air flow it will hold under 220, but any stop light or heavy throttle load will raise the temperature (Out side air in the 105 range). I drove it this morning with the temperature in the mid seventies, and the temp hovered at 205, and climbed at every stop light). I am worried about overheating the silly thing during break-in and how to troubleshoot. I have ordered a wide band sensor and will look to have the JTEC computer tuned, but I am currently pulling my hair out. Prior to the stroker build the engine never had overheating issues and could drive anywhere without concern with stock radiator and parts. The only air flow change was adding the transmission cooler in front of the radiator when the new parts were installed. No pinging detected, and I am running premium fuel. No other drivability issues and it pulls better that the 4.0 (But not as strong as expected) Any advice on troubleshooting prior to putting the wideband sensor in the vehicle? Any benefit in relocating the transmission cooler to the other side of the engine?
Thanks,
John
Do any of you have sage advice for troubleshooting overheating on a new stroker build. The stroker was build with 1998 block and BnB parts from Russ P. Including pistons, rods, crank, ported head, cam shaft, port matched intake, with .030 over on the cylinders, and a .010 deck on the block for a stated compression of about 9.3. The builder used a racing head gasket with stainless steel layers at stock thickness that matched the .030 over bore. The exhaust is Banks headers with a full two inch down tube to a cat back banks exhaust. The computer is stock. The cat is out of the Jeep while I break in the engine.
I have new parts including: mishimoto aluminum radiator, silicone hoses, flow cooler water pump, new thermostat and housing, new heavy duty fan clutch. Ac condenser, and a plate transmission oil cooler mounted on the passenger side in front of the mechanical fan. The electrical fan is working and pulling decent amounts of air. I have a new temp sensing gage that is working and giving realistic readings. Jeep is on 35” tires with 4.56 gears, and now which or airflow obstructions.
I have driven it about 200 miles after the build and I know it is hot in Phoenix right now, but I am fearful to take my eyes off the temp gage. A couple of times it has gotten into the 240 degree range and flashed the engine light before I turned the cab heater on to cool it back down. Without the AC running and keeping steady air flow it will hold under 220, but any stop light or heavy throttle load will raise the temperature (Out side air in the 105 range). I drove it this morning with the temperature in the mid seventies, and the temp hovered at 205, and climbed at every stop light). I am worried about overheating the silly thing during break-in and how to troubleshoot. I have ordered a wide band sensor and will look to have the JTEC computer tuned, but I am currently pulling my hair out. Prior to the stroker build the engine never had overheating issues and could drive anywhere without concern with stock radiator and parts. The only air flow change was adding the transmission cooler in front of the radiator when the new parts were installed. No pinging detected, and I am running premium fuel. No other drivability issues and it pulls better that the 4.0 (But not as strong as expected) Any advice on troubleshooting prior to putting the wideband sensor in the vehicle? Any benefit in relocating the transmission cooler to the other side of the engine?
Thanks,
John