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Glad to have a V8
Just wanted to post some info about the V8 conversion that I recently performed. The subject has been posted several times, but mainly debates of right or wrong. So here goes.
The car is a 76 911S with a turbo look steel body kit and a RS 3.8 rear wing,and had an RS spec. 2.7 with about 18,000 miles on the motor. After a hard drivers ed the 2.7 lost no. 5 and 6 cyl. so I decided what I needed was something a little different. Then I bought a four bolt main Chevy 350 and installed flat top pistons, shotpend and smoothed rods, Holley System Max cam and intake kit, pocket ported and port matched heads, roller rockers, 7 qt oil pan, windage tray, and MSD multistrike ign. system with rev. limiter, topped by a Holley 750 Vac. Sec. carb. The engine is built so I moved on to the trans., first was to change to an aluminium cased 915 and install custom fourth and fifth gear ratios from Powerhaus to allow cruising at 70mph at only 2000rpm. First through third are stock. The clutch disc is a Kevlar faced unit from Motormiester and a stock 911SC pressure plate. This can hold something like 430Lb of torque, and is as smooth and light as a stock SC. Engine to trans adapter and flywheel were from Kennedy Engineering which were both of high quality.
For the cooling system I deviated a little from the norm. by using an electric water pump from Mesier, this unit is slick, uses 5.7amps will pump 35 gal/min at 9psi. It also is rebuildable and has an estimated life of 2500hrs. I choose this pump to help keep the weight forward. The pump is mounted in the front of the car behind a Griffin 1.25in two core radiator. I did have to cut a hole in the front, ahead of the gas tank but this is the only hole, a piece that I kept in case the car is ever restored to Porsche power. The gas tank I cut down to 15 gallons to allow and air outlet for the radiator. The valance was also cut to allow an inlet and it only appears that a front oil cooler has be added. In the front trunk the spare was replaced with a can of fix-a-flat and a cell phone, but it still has a decent trunk. The coolant hoses are run under the car with a 1.25in hose from engine to radiator then out of the radiator to pump then two 3/4in hose to the dual inlets on the front of the engine block. Two 12in electric fans and a 100amp alternator do a good job of keeping things cool, can get to 210 on a 98degree day in traffic with the air-conditioning on, but runs on the 180 degree thermostat on the road.
The brakes were upgraded with Hawk HP+ pads, and braded hoses. The suspinsion was treated to turbo rear tors. bars, turbo tie rods, front strut brace, Bilsten Sports shocks. The tires and wheels are 17in turbo twists with 215/45s front and 255/40 rear Bridgestone SO-2s.
The car handles well and does not feel tail heavy, there is a little bit of push in turns that did not use to be there but will install adjustable roll bars to dial in. The car is very, very fast and feels like it, however the motor is quieter at speed than the Porsche engine was, no cooling fan. Now you nail the gas at 2,000rpm it pulls like crazy and continues to pull to 6,000rpm. I love it, if you have a desire to do this conversion don't let your opinionated budys keep you from it, believe me they will grin wide when you take them for a spin around the block.
This conversion may not be your cup of tea but please refrain from brow/beating this V8 conversion fan, its all fun....
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