Big cam 350 rail pressure
Shift points can be raised which also makes it easier tune for a bigger cam and injectors later. Whether you’re towing on low-octane or springing for good fuel, a tuner can dial-in the ECM and take it to the next level.
All these can be done in the garage, but the tune won’t be optimized.Īt this point, we recommend you talk to your chassis dyno tuner and decide on a computer programmer.
#BIG CAM 350 RAIL PRESSURE FREE#
An electric fan kit will free up the power. Trucks often come with mechanical fans that sap horsepower. The problem is that the engine starts to sound REALLY good and owners find themselves wanting to go faster. Many people start off adding a cold air intake and aftermarket exhaust. Trucks are the everyday hotrods of the 21 st century.
Although the iron block LM7 is a bit heavier, you can really pour the coals to it. The aluminum blocks made good power naturally aspirated, but they aren’t the best choice with big boost and nitrous.
With the availability of engine swap kits, it just makes good sense to use Gen. The later 2004-07 versions were right there with the C4 Corvette’s LT1. Even bottled up and 25 cubic inches smaller, it matched the power and torque of the F-body LT-1’s. I/II engines and easier to find one in good shape. There were a couple key areas where the LM7 excelled:įully dressed, it’s a bit lighter than Gen. III, 5.3L iron block truck engines you can pick up in wrecking yards for about $600. The LM7 (along with its L59 FlexFuel E85-capable brother) are the Gen. Any help would be greatly appreciated.Meet the hidden gem that helped start the LS-swap craze. I have spent thousands on this truck and nobody can seem to figure it out. Do any of the guys on here have any idea what could be wrong with the engine? I did notice that it seems to have a bunch of blow-by now. Pretty much everything has been replaced and it still runs for crap and can't be used. Between the two trips to a garage, we tried to haul a load with it and the turbo went out of it so that has been replaced as well. The injectors had 300 miles on them but were not "cummins" injectors so the injectors were changed 3 times now in 35K miles and that changed nothing. I took the truck to a different mechanic, he says its injectors and that will fix it. Fuel pressure was checked and it sustains up to 240# and the anaroid valve is good. Same white smoke, same lack of power, same BAP BAP BAP noise under a load, everything is the same with a new cam. It rolls out of the garage and the popping sound to the exhaust is gone but otherwise everything is still the same. There was a bent push tube that was discovered in the process of changing the cam. I decided to change the cam and see if anything else showed up in the meantime. I had 3 different mechanics look at it and they all had different ideas. It seemed to have a popping sound to it as well. It stunk like raw fuel and began making a BAP BAP BAP (sounds like a machine gun) sound when under a hard pull. The white smoke quit clearing up and the fuel mileage dropped. It began smoking considerably more within a few thousand miles. I had the overhead ran and it seemed to get a little worse. It gradually began losing power and started smoking more after 15K miles of me having the truck. The truck smoked a fair bit when starting out but would for the most part clear up like they are supposed to. Crank polished, liners, pistons, heads, push tubes, injectors. It had roughly 20K on the truck after total rebuild. I have a Cummins NTC 400 Big Cam 3 that was rebuilt prior to me purchasing the truck.