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99 Cobra block
- Thread starter Cobra99
- Start date
there were 2 different blocks available from 99-01. the teskid aluminum and the windsor. The only difference in the blocks is that the windsor is considered the weaker of the two, which is kinda a myth because it's not capable of holding 2000+ hp. The way to tell the difference is by looking in the valley under the intake or by looking at the back of the block.
mahnley are supposed to be pretty good
i think it was about half the 99s came with teksid blocks which are a lot stronger than the windsors
the 01s only a handful came with teksids
teksid is 5 lbs heavier
a 99 teksid block is known to be able to handle well over 1000 whp
a windsor will fail at around 600 wheel i believe
teksid is gawdly by the way
teksid ftw
i think it was about half the 99s came with teksid blocks which are a lot stronger than the windsors
the 01s only a handful came with teksids
teksid is 5 lbs heavier
a 99 teksid block is known to be able to handle well over 1000 whp
a windsor will fail at around 600 wheel i believe
teksid is gawdly by the way
teksid ftw
Hijacked info
Q. What is different between the 99/01 and 96-98 4.6 4 valve engines?
A. The 96-98 mustang cobra comes with a 281 cube 4 valve engine. It sports an aluminum block with a 3.55 bore/3.54 stroke. This block has 6 bolt main caps and is cast by Teksid in Italy. This block also has jack screws (to positively locate the main caps from the side) and smaller side bolts that go through the jack screws. The forged crankshaft is a kellog piece and has an 8 bolt flywheel bolt pattern. The powdered metal rods and hypereutectic pistons are the weak points. The pistons have a 3cc dish. The 96-98 is also equipped with the B heads. They are also known as swirl port heads. These heads have 2 intake ports per cylinder, with an Intake runner control (IMRC) to block off the secondary intake ports until the engine reaches 3250 rpm to promote torque production. The camshafts produce a touch more lowend power then peak power to make the engine more responsive down low. The long runner intake is a 2 piece unit with a sidemount dual 57mm throttle body.
The 99/01 motor has a very similar bottom end. The only differences include larger side bolts with no jack screws, a different sized knock sensor bolt, and the possibility of a different block. The new block is the Windsor Aluminum Plant block (wap block for short). This block has visible ribbing that looks stronger, but the case itself is thinner, making it 5lbs lighter, but weaker overall. The teksid block is the one to have, but the wap will still stand over 700bhp. The heads are single port, tumble port “C” Heads. They have a smaller intake port and larger more oval exhaust port in order to make the engine more responsive. The cams are ground more for top end power. The 2 piece intake also has a side mount 57mm throttle body and long runners for torque production. The timing gear is pretty similar with slight differences. The valve covers and timing covers are different. The ignition on the 99/01 motor is a coil on plug system vs 2 coil packs and plug wires on the 96-98. The COP system delivers a stronger spark with less maintenance.
Q. What is different between the 99/01 and 96-98 4.6 4 valve engines?
A. The 96-98 mustang cobra comes with a 281 cube 4 valve engine. It sports an aluminum block with a 3.55 bore/3.54 stroke. This block has 6 bolt main caps and is cast by Teksid in Italy. This block also has jack screws (to positively locate the main caps from the side) and smaller side bolts that go through the jack screws. The forged crankshaft is a kellog piece and has an 8 bolt flywheel bolt pattern. The powdered metal rods and hypereutectic pistons are the weak points. The pistons have a 3cc dish. The 96-98 is also equipped with the B heads. They are also known as swirl port heads. These heads have 2 intake ports per cylinder, with an Intake runner control (IMRC) to block off the secondary intake ports until the engine reaches 3250 rpm to promote torque production. The camshafts produce a touch more lowend power then peak power to make the engine more responsive down low. The long runner intake is a 2 piece unit with a sidemount dual 57mm throttle body.
The 99/01 motor has a very similar bottom end. The only differences include larger side bolts with no jack screws, a different sized knock sensor bolt, and the possibility of a different block. The new block is the Windsor Aluminum Plant block (wap block for short). This block has visible ribbing that looks stronger, but the case itself is thinner, making it 5lbs lighter, but weaker overall. The teksid block is the one to have, but the wap will still stand over 700bhp. The heads are single port, tumble port “C” Heads. They have a smaller intake port and larger more oval exhaust port in order to make the engine more responsive. The cams are ground more for top end power. The 2 piece intake also has a side mount 57mm throttle body and long runners for torque production. The timing gear is pretty similar with slight differences. The valve covers and timing covers are different. The ignition on the 99/01 motor is a coil on plug system vs 2 coil packs and plug wires on the 96-98. The COP system delivers a stronger spark with less maintenance.
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