What was the most powerful Pontiac engine?
The most powerful version of Pontiac’s 400 to ever reach production was the Ram Air IV. With its improved cylinder heads and their round exhaust ports, they’re easy to spot.
How much horsepower does a Pontiac 350 have?
This was underrated at 330 hp (246 kW). Many of GM’s other divisions’ 350’s like Chevrolet, Buick and Oldsmobile and even the base SS396 were handily beaten by this little 350 “High Output” (HO) Pontiac. Basically a 350 with 400 heads to match the pistons, the 350 H.O.
How much horsepower did the Pontiac 455 have?
Rated conservatively at 360 horsepower and producing a tremendous 500 pound-feet of torque, the 455 HO gave the GTO the powerful aggression needed to appeal to performance-minded buyers.
How much horsepower does a 1973 Pontiac 455 have?
Horsepower and Torque In 1973, a 250-horsepower 455 with 370 foot-pounds of torque surfaced along with a 455 Super Duty, which provided 310 horsepower and 390 foot-pounds of torque.
How much horsepower can you get out of a Pontiac 400?
In the end, No. 97 jets square, 0.030/0.020 valve lash, and 31.5 degrees timing produced 650.4 hp at 6,300 and 596 lb-ft of torque at 4,900 rpm….
| Heads | |
|---|---|
| Brand | 340-cfm, 74cc KRE aluminum D-ports |
| Maximum Flow at 28 Inches of Water | |
| Intake | 341-cfm at 0.700 lift |
| Exhaust | 261-cfm at 0.700 lift |
How much horsepower does a 6.6 Pontiac have?
| Pontiac Firebird II Trans Am 400cu 6.6L Engine Technical Data | |
|---|---|
| Compression Ratio : | 10.50 |
| Maximum power – Output – Horsepower : | 350 PS or 345 bhp or 257 kW @ 5000 rpm |
| Maximum torque : | 583.0 Nm or 429 lb.ft @ 5000 rpm |
| Drive wheels – Traction – Drivetrain : | RWD |
How much HP does a Pontiac 400 have?
The 400 was inspired by the Pontiac 389 V8 and proved to be the last Pontiac engine with closed chambered heads. At the start of the 1970s, the 400 V8 generated more than 300 horsepower, but decreased to 180 horsepower by the time the last 400 engine was produced in 1978.
What is Pontiac’s biggest motor?
The 455-cu.in. V-8 debuted in 1970 and was the largest displacement Pontiac engine ever built for the street.
Is Pontiac 455 and 400 the same block?
We took the question to David Butler of Butler Performance in Lawrenceburg, Tennessee, for his professional opinion. He advises, “With the exception of the mid- to late-1970s PN 500557 casting, we consider all Pontiac 400 blocks functionally identical. The 455 blocks from 1970 to 1976 are also functionally identical.
How much HP can you get out of a Pontiac 400?
In the end, No. 97 jets square, 0.030/0.020 valve lash, and 31.5 degrees timing produced 650.4 hp at 6,300 and 596 lb-ft of torque at 4,900 rpm….
| Engine Buildup Worksheet | |
|---|---|
| Engine Displacement | 463 |
| Torque | 596 lb-ft |
| Bore/Stroke | 4.185/4.21-in |
| Block/Crank Combo | 400 block, bored 0.035-in/stock 4.210, |
What is the best Pontiac?
For your enjoyment and consideration, here are the 10 best Pontiac sports cars of all time.
- 1987 Pontiac Firebird Trans Am GTA.
- 2008 Pontiac G8 GT.
- 1999 Pontiac Grand Am GT.
- 1969 Pontiac GTO Judge Ram Air III.
- 2005 Pontiac Grand Prix GXP.
- 2006 Pontiac G6 GTP.
- 1990 Pontiac Turbo Grand Prix.
- 10.1985 Pontiac Fiero GT.
What was the highest horsepower of a Pontiac V8?
In 1959, the 370 was stroked out to become the famous 389-cid Pontiac V8. Fuel-injection was gone, but the highest output level was now up to 345 hp thanks to a Tempest 395-A option with a 10.5:1 compression ratio and Tri-Power combination. The 389-cid V8 was used in all Pontiacs in 1960.
When did Pontiac stop making the 455 engine?
by Rob Wagner General Motors produced the Pontiac 455-cubic-inch V-8 engine from 1970 through 1976. The 455 wielded massive horsepower, but a new horsepower rating system and tighter emission controls drove the 455’s power lower each year until GM abandoned the engine in 1976.
When did the Pontiac 200 hp engine come out?
A 200-hp version was introduced in mid 1955 when a 4-barrel carburetor was made available. Engine displacement grew to 316.6 for 1956, and horsepower increased to 205 for the 2-barrel and 227 for the 4-barrel. Optional dual exhaust added about 10 hp to either engine.
What kind of engine did the Pontiac goat have?
The 389 was still around and the Tempest (now a mid-sized car) retained the 326, until the GTO was snuck out as an option at midyear. The first true “muscle car,” the so-called “Goat” came with a base 389-cid 325-hp V8 in a mid-sized body. An optional Tri-Power version of the same engine with 348 hp was offered.