Noob here, what the difference between accords with vtec vs. ulev valve covers
- Thread starter vtfulton
- Start date
Jordan_H
Well-Known Member
Ulev means ultra low emissions vehicle and I believe there's not really a horsepower difference. I believe they're the same but the f23a4 might be slightly less
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WizadOfOz
Well-Known Member
F23A4
This engine was used in the 1998-2002 Honda Accord ULEV models. It is substantially similar to the F23A1, but features ULEV certification with a slight reduction of power: 148 hp (108 kW) with a maximum torque of 150 lb·ft (203 Nm). This engine has a different exhaust manifold, a more restrictive intake manifold and cylinder head, and a 32-bit ECU which uses an AFR (Air Fuel Ratio) oxygen sensor when compared to the F23A1.
Source: Wikipedia.org
This engine was used in the 1998-2002 Honda Accord ULEV models. It is substantially similar to the F23A1, but features ULEV certification with a slight reduction of power: 148 hp (108 kW) with a maximum torque of 150 lb·ft (203 Nm). This engine has a different exhaust manifold, a more restrictive intake manifold and cylinder head, and a 32-bit ECU which uses an AFR (Air Fuel Ratio) oxygen sensor when compared to the F23A1.
Source: Wikipedia.org
james'99
Well-Known Member
I mean, theoretically, even though it had less power, it had beefier exhaust components, more restrictive head, etc, the ULEV should cost more but they were probably about the same price more or less.
bairdandrew77
Well-Known Member
It's pretty much the same as the f23a1, just pollutes a little less and has like 4 or 5 less hp depending on which source you find.
Pretty much what the others said, more restrictive intake exhaust and head. I'm not sure what's different about the head though, different port maybe?
I think the main point was marketing. Show customers they care about the environment
Pretty much what the others said, more restrictive intake exhaust and head. I'm not sure what's different about the head though, different port maybe?
I think the main point was marketing. Show customers they care about the environment
BlkCurrantKord
Super Moderator
Heads, intake, etc are the same.
The difference is in the emissions, different exhaust manifold, o2 sensor, and o2 sensor placement. I believe it has a wideband o2 factory.
The difference is in the emissions, different exhaust manifold, o2 sensor, and o2 sensor placement. I believe it has a wideband o2 factory.
WizadOfOz
Well-Known Member
Indeed, the ULEV model was designed to comply with strict CA emissions for the US. The engine has a slight power reduction but at the benefit of lower CO2, as far as value goes it seems that the cost was the same as LEV models.
