- Joined
- May 18, 2008
- Messages
- 1,510
- Reaction score
- 368
- Points
- 83
- Location
- Vancouver area BC Canada
- Vehicle Year
- 92 & 83 project
- Make / Model
- Ford
- Engine Type
- V8
- Engine Size
- 4.0L 302
- Transmission
- Automatic
I am a show me kinda person. here is what i can come up with from what is being presented in a real way. in my build i will be impressed with a total 290 HP NET but in reality i am probably more at 275. Fully dressed HP.
cheers
http://www.automobile-catalog.com/make/ford_usa/mustang_2gen_ii/mustang_2gen_ii_cobra_ii/1978.html
petrol (gasoline) engine with displacement: 4942 cm3 / 301.6 cui, advertised power: 99.5 kW / 133 hp / 135 PS ( SAE net ), torque: 330 Nm / 243 lb-ft
NET vs GROSS HP ratings
https://ateupwithmotor.com/terms-technology-definitions/gross-versus-net-horsepower/
define HP GROSS
Gross output, which in the U.S. is typically measured using the methodology laid out in SAE standards J245 and J1996, is the output of a ‘bare’ engine running on a test stand with no external engine-driven accessories (e.g., alternators or water pumps), free-flowing exhaust headers with no mufflers, and optimal ignition timing. Gross ratings are also mathematically corrected for standard atmospheric conditions. In other words, gross output represents a particular engine’s maximum output under ideal conditions.
define NET
For that reason, the SAE and similar bodies have also established standards for measuring net output. Net ratings, such as the ones defined by SAE standards J1349 and J2723, are still taken with the engine on a test stand, but reflect stock ignition timing, carburetion/fuel delivery, exhaust systems, and accessories. The specific methodology varies depending on the specific standard being used, but the gist is that a net rating is a closer approximation of an engine’s output as actually installed in a car.
1978 302 = 133 NET HorsePower
add stuff heads https://lmr.com/products/what-are-gt40-heads-mustang
What Are The GT40 Head Power Gains?
Although you will see different gains from car to car and with more mods, we can give you a ball park power gain that you will see from doing the swap. Most stock Fox Body Mustangs can expect an increase of 20-40 horsepower over stock heads (at the crank), so around 15-30 rear wheel horsepower.
new HP 133 + (stock 35?hp) = 165HP
Add Cam extra 25-30 hp? add intake and 4 BBL 25 HP? add long tubes +15HP
165 + 80 = 245 ?? NET if lucky
cheers
http://www.automobile-catalog.com/make/ford_usa/mustang_2gen_ii/mustang_2gen_ii_cobra_ii/1978.html
petrol (gasoline) engine with displacement: 4942 cm3 / 301.6 cui, advertised power: 99.5 kW / 133 hp / 135 PS ( SAE net ), torque: 330 Nm / 243 lb-ft
NET vs GROSS HP ratings
https://ateupwithmotor.com/terms-technology-definitions/gross-versus-net-horsepower/
define HP GROSS
Gross output, which in the U.S. is typically measured using the methodology laid out in SAE standards J245 and J1996, is the output of a ‘bare’ engine running on a test stand with no external engine-driven accessories (e.g., alternators or water pumps), free-flowing exhaust headers with no mufflers, and optimal ignition timing. Gross ratings are also mathematically corrected for standard atmospheric conditions. In other words, gross output represents a particular engine’s maximum output under ideal conditions.
define NET
For that reason, the SAE and similar bodies have also established standards for measuring net output. Net ratings, such as the ones defined by SAE standards J1349 and J2723, are still taken with the engine on a test stand, but reflect stock ignition timing, carburetion/fuel delivery, exhaust systems, and accessories. The specific methodology varies depending on the specific standard being used, but the gist is that a net rating is a closer approximation of an engine’s output as actually installed in a car.
1978 302 = 133 NET HorsePower
add stuff heads https://lmr.com/products/what-are-gt40-heads-mustang
What Are The GT40 Head Power Gains?
Although you will see different gains from car to car and with more mods, we can give you a ball park power gain that you will see from doing the swap. Most stock Fox Body Mustangs can expect an increase of 20-40 horsepower over stock heads (at the crank), so around 15-30 rear wheel horsepower.
new HP 133 + (stock 35?hp) = 165HP
Add Cam extra 25-30 hp? add intake and 4 BBL 25 HP? add long tubes +15HP
165 + 80 = 245 ?? NET if lucky