This project features a Level 2 performance engine build on a 2.2L mechanical fuel injected 911E engine. The stock stroke of the 2.2 liter engine is 66 mm. We changed the stroke to 70.4 mm by using a 2.7 liter crankshaft and connecting rods. This change gave us a 2.4 liter with 2341 cc displacement. We then ran this engine and set it up on our engine dyno.
All crankcase and crankshaft oil passage plugs were removed for proper cleaning of the oil passages. We then installed new plugs and micro polished the crankshaft. We also performed a crankcase oil bypass modification for better oil flow and pressure. The engine case was updated with case inserts and ARP head studs. The last update to the bottom end of this engine was a 3.0 liter oil pump and updated oil pressure relief pistons and springs.
The pistons and cylinders are the original 2.2 E that have been fully reconditioned and balanced. The original 2.2 E cylinder heads we resurfaced and new valve guides were installed. Then all valve seats were cut on our Mira precision valve seat cutting machine from Switzerland. New performance valves were installed with all valve lengths set. New valve springs were pressure tested and spring heights were set. Deck height and compression ratio were checked and adjusted. The connecting rods were reconditioned and new ARP rod bolts installed. The rods were then balanced end to end. The crankshaft, front pulley, flywheel and pressure plate were all balanced together as one unit. The 2.2 liter injection pump was replaced with a rebuilt 2.4 liter pump. The throttle bodies were completely rebuilt, with new shafts, bushings, etc. The exhaust system remained original. The timing chains, ramps, and tensioners were all replaced. All bearing clearances were checked and recorded. Upon assembly, we measured and recorded all fitment and clearance specifications.
Below are specifications of this engine after set up and break-in on our engine dyno, as well as comparisons to stock specifications.
Hp & Torque Specifications
Our Engine – 911E 2.4L: 187 hp at 6,500 rpms and 167 ft. lbs. torque at 5,400 rpm
Stock 911E 2.2L: 155 hp and 140 ft. lbs. torque
Stock 911E 2.4L: 165 hp and 151 ft. lbs. torque
After the dyno session, we changed the oil and filter, took an oil sample, re-torqued the cylinder heads, adjusted the valves and went over engine set up again. The owner was given a maintenance interval protocol to follow for proper care of the engine during the remainder of the break-in period.
The dyno test was performed on a Go Power Dynamometer with Land and Sea Data Acquisition Software. The Go Power dynamometer records in DIN hp.
A video of this engine on our dyno is featured below the photo gallery.
