0
Can a 1970 Pontiac Firebird 400 CI Pontiac engine be replaced with a 1970 544 CI Pontiac engine?
Wiki User
∙ 15y ago
Everything will mount to the 455 motor.....matter infact, if you use the 400 heads, you will gain some compression in comparison to a like 455 head (ie.. 400 vs 455 6x heads). can I have your old 400 motor? Yes everthing will fit. However, if you are going to drive it on the street you do not want higher compression, the stock compression on most 1970 Pontiac 455s is about 10.25-1 (already too high for 93 octane pump gas). Changing to a 1970 400 head (around 72cc combustion chambers) will put your compression up to about 12.5-1 and require at least 105 octane fuel. If this is for the strip only, or you have a source of affordable race gas then yes higher compression will increase horsepower and torque. On pump gas shoot for about 9.5-1 compression max with iron heads. A great head for a pump gas 455 is the 1971 400 head casting number 96 it has 2.11/1.77 valves and 96cc chambers and will make about 9.5-1 with a stock 455 short block.
Wiki User
∙ 15y ago
Add your answer:
Earn +20 pts
I HAVE A 1970 PONTIAC FIREBIRD WITH A 400 CI PONTIAC ENGINE I WANT TO REPLACE IT WITH A 1970 455 CI PONTIAC ENGINE WILL IT FIT POWER STEERING AND ALT BRACKETS INTAKE FLEXPLATE THE SAME?
Everything should bolt right up.
Where can you find a wiring diagram for the dash of a 1970 Pontiac Firebird?
A 1970 Pontiac Service Manual will have this info in it. You can find them on Ebay or one of the literature places on the web.
What HEI Distributors will work in a 1970 firebird 350?
If it is a Pontiac 350, any hei distributor out of any size Pontiac motor up to 1979 will work.
What is a Pontiac Firebird Esprit?
A trim package offered in the 1970-1981 firebirds. Was one level up from the base firebird, offered a delux interior, ect. Was not a performance option.
What is the 0-60 time for a 67 Pontiac firebird?
The 0-60 time for a stock(455 CU-IN) 67 Firebird is 5.5 seconds No such thing as a stock 455 67 Firebird. 455 wasn't built until 1970.
What is the largest Pontiac engine?
i think the GTO has the LS2 6.2 That depends on what your idea of a Pontiac engine is. The "New" Pontiac GTO was available with the 6.0 engine. If you are talking about a traditional Pontiac engine, the largest factory offered engine is the 455 from 1970-1976.
Will there be a 2013 Pontiac firebird?
There is some aftermarket companies making a bandit and a 1970 look alike. Then there is also this below. Please refer to the related links.
Do the front springs and motor mounts need to be replaced when replacing a Pontiac 301 engine with a Pontiac 350 or 400 or 455 engine for a 1979 firebird espirit?
Yes, the 350,400,or 455 will out weigh the 301 by about 200lbs, so the front end will sag under the additional weight. Depending on the year of the motor you are swapping in you may be able to use the stock mounts. 1970-1979 Pontiac V8s had five bolt bosses per side and will bolt up to the 301 mounts. Pre '70 only had two bolts per side making a mount swap nessary.
What size engine was in a 1967 Pontiac Bonneville?
1in 1967 the 400 cu in V8 becme the standard for Bonneville until 1969, when a 360 hp 428 became the standard Bonneville engine, which in turn was replaced in 1970 by an even larger 455 cu in rated at 370 hp.
What are the torque specs for 1970 Pontiac 400 Ram Air engine rocker ams?
20 foot pounds.
Who makes the pontaic firebird Trans Am?
The Pontiac Firebird Trans Am was made by Pontiac, which is a division of General Motors. The first (1969), second (1970-1981), and third (1982-1992) generation cars were assembled at either the Van Nuys, California or Norwood, Ohio plants while the fourth generation (1993-2002) cars were assembled at the Sainte-Thérèse plant in Quebec, Canada.
Will a 1976 455 Pontiac engine from a Grand Prix bolt right in a 70 GTO and can you put your 70 heads and intake on it?
Can you bolt on earlier heads/intake/exhaust manifolds.. from a 1970 Pontiac 455 to this 76 455 engine.
