Alfetta Sedan Rebuild
Discussion
Okay, so I've consolidated my debt, and will soon have a few extra bucks each month to spend on my baby: My Alfetta Motronic Sedan!
It's all not as easy/cheap as i think, but at leasdt this will be a long term project and I'm in the planning stage now, so thus far things can change as the budget and time allows! My 156 will stand in as the drive of choice while the Alfetta is undergoing major heart surgery, but things will change in a while!
This is not a restoration, but rather a rebuild to modify it and several ways, as you will come to see from my plans.
Right now, my plans include the following:
Interior retrim, including new custom door panneling (door cards), recarpeted interior, replacing the seats with four racing buckets including 5 point racing harnesses, additional instrumentation on the A-pillar and dash, in specially fabricated pods (std insrumentation includes rev counter, speedo, oil pressure, water temp and fuel guage. I plan to include oil temperature, boost guage, ammeter, voltmeter, water pressure, fuel pressure, lambda and egt guages).
A custom sound install will round off the interior. This will be made up of two 10" subwoofers mounted one above the other between the two rear buckets (no need to drown out the engine's glorious sound effects too much!), a tank of NOS mounted in "floating" fassion in front of the subs, large full range mids and tweeter components in each door including the rears, auxiliary tweeters on the dash, A; B and C pillars, and 6X9's doing duty as rear fill drivers.
These will be powered by three amplifiers. One monoblock for the subwoofers, a large powerfull 4 channel unit for the mids, and a lower powered unit for the tweeters. The head unit will be something stylish either from Dayton or Alpine.
Exterior features to the body will include a GTV6 3.0 (SA spec of course!) front scoop with large hole to fit the intercooler protected by an aluminium mesh grill that will mash little rodents and rabbits that dare cross it's path, wider flared fender arches, a set of Compomotive 3 piece split rims, full custom respray, rear diffuser (no big wing!), deeper side sills, lowered suspension (40mm front, 20mm rear for clearance of the large wheels and for a slightly nose-down stance).
The suspension will also include stiffer adjustable dampers, stiffened anti roll bars, poly bushes, coil-overs at the rear and thicker torsion bars at the front.
The drivetrain will include a limited slip differential from an Alfa 75 turbo, standard gearbox (ratios allow approx. 230km/h at 7000rpm which is okay, this will be more of a show car than a racer!), propshaft rubber joint protectors (as fitted to racing cars during the 80's), large diameter ventilated, drilled and grooved brake discs in front, ventilated and drilled discs at the rear from the RZ/SZ, Brembo calipers at the front and RZ/SZ calipers at the rear, adjustable brake proportioning valve, new strengthened sideshafts and uprated and lightened button clutch.
The engine (2.0 motronic unit) will (obviously) be turbocharged, NOS fed and fitted with throttle body injection. The NOS will be computer controled. At the flick of the switch, it should douse the fuel a few milliseconds before fogging the NOS. And an awesome purge valve. The exhaust system will be a custom fabricated manifold for turbo installation, 72mm tubing throughout and a large central exiting tail piece, hopefully a 120mm x 60mm wide-oval diffuser.
The heads are being gasflowed and ported for turbo application, the cams will be 11.9mm lift for extra torque, and reduced compression means I'd be able to utilise the standard VIVT system to full effect to reduce loss of torque at low RPM. i'm looking at a minimum of 9.0:1 compression, possibly 9.5:1 with knock sensors fitted.
I'm just so excited about this and can keep rattling on forever but I think I've said enough.
Does anyone own/know of someone with a modified engine of this kind? It's a 117 type engine, ie a 2.0 twin cam 8V with variable intake valve timing and Bosch Motronic injection. i'd like to hear their views on modifying this engine/drive train. In the end, I'm looking for around 225bhp reliably. I know I'll have to fit special valve train components, con rods, pistons, bearings, etc.
I'd like to know if the standard crank could still be used with 225bhp and 7000rpm. Both flywheels will be lightened and the engine meticulously ballanced for vibration as well as combustion chamber sizes.
Can't wait to post progress pics, but you're going to have to wait a while as I'm still planning!
It's all not as easy/cheap as i think, but at leasdt this will be a long term project and I'm in the planning stage now, so thus far things can change as the budget and time allows! My 156 will stand in as the drive of choice while the Alfetta is undergoing major heart surgery, but things will change in a while!
This is not a restoration, but rather a rebuild to modify it and several ways, as you will come to see from my plans.
Right now, my plans include the following:
Interior retrim, including new custom door panneling (door cards), recarpeted interior, replacing the seats with four racing buckets including 5 point racing harnesses, additional instrumentation on the A-pillar and dash, in specially fabricated pods (std insrumentation includes rev counter, speedo, oil pressure, water temp and fuel guage. I plan to include oil temperature, boost guage, ammeter, voltmeter, water pressure, fuel pressure, lambda and egt guages).
A custom sound install will round off the interior. This will be made up of two 10" subwoofers mounted one above the other between the two rear buckets (no need to drown out the engine's glorious sound effects too much!), a tank of NOS mounted in "floating" fassion in front of the subs, large full range mids and tweeter components in each door including the rears, auxiliary tweeters on the dash, A; B and C pillars, and 6X9's doing duty as rear fill drivers.
These will be powered by three amplifiers. One monoblock for the subwoofers, a large powerfull 4 channel unit for the mids, and a lower powered unit for the tweeters. The head unit will be something stylish either from Dayton or Alpine.
Exterior features to the body will include a GTV6 3.0 (SA spec of course!) front scoop with large hole to fit the intercooler protected by an aluminium mesh grill that will mash little rodents and rabbits that dare cross it's path, wider flared fender arches, a set of Compomotive 3 piece split rims, full custom respray, rear diffuser (no big wing!), deeper side sills, lowered suspension (40mm front, 20mm rear for clearance of the large wheels and for a slightly nose-down stance).
The suspension will also include stiffer adjustable dampers, stiffened anti roll bars, poly bushes, coil-overs at the rear and thicker torsion bars at the front.
The drivetrain will include a limited slip differential from an Alfa 75 turbo, standard gearbox (ratios allow approx. 230km/h at 7000rpm which is okay, this will be more of a show car than a racer!), propshaft rubber joint protectors (as fitted to racing cars during the 80's), large diameter ventilated, drilled and grooved brake discs in front, ventilated and drilled discs at the rear from the RZ/SZ, Brembo calipers at the front and RZ/SZ calipers at the rear, adjustable brake proportioning valve, new strengthened sideshafts and uprated and lightened button clutch.
The engine (2.0 motronic unit) will (obviously) be turbocharged, NOS fed and fitted with throttle body injection. The NOS will be computer controled. At the flick of the switch, it should douse the fuel a few milliseconds before fogging the NOS. And an awesome purge valve. The exhaust system will be a custom fabricated manifold for turbo installation, 72mm tubing throughout and a large central exiting tail piece, hopefully a 120mm x 60mm wide-oval diffuser.
The heads are being gasflowed and ported for turbo application, the cams will be 11.9mm lift for extra torque, and reduced compression means I'd be able to utilise the standard VIVT system to full effect to reduce loss of torque at low RPM. i'm looking at a minimum of 9.0:1 compression, possibly 9.5:1 with knock sensors fitted.
I'm just so excited about this and can keep rattling on forever but I think I've said enough.
Does anyone own/know of someone with a modified engine of this kind? It's a 117 type engine, ie a 2.0 twin cam 8V with variable intake valve timing and Bosch Motronic injection. i'd like to hear their views on modifying this engine/drive train. In the end, I'm looking for around 225bhp reliably. I know I'll have to fit special valve train components, con rods, pistons, bearings, etc.
I'd like to know if the standard crank could still be used with 225bhp and 7000rpm. Both flywheels will be lightened and the engine meticulously ballanced for vibration as well as combustion chamber sizes.
Can't wait to post progress pics, but you're going to have to wait a while as I'm still planning!
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