Buick 455 Stage 1 stock camshaft specs
- Thread starter Houtan
- Start date
it depends on what year you're talking about. can't never be easy, can it? 
what i've got for 1970 shows
i don't know what the lobe separations where.
what i've got for 1970 shows
Code:
Int Exh Sep
Lift Dur Lift Dur
Stand .390" 293 .458" 322
Stg 1 .407" 316 .458" 340
i only have Stage 2 specs from 1969, keep in mind that
this would have been with smaller dia valves
Stg 2 .453" 225 .480" 253i don't know what the lobe separations where.
Have a look here:
https://www.teambuick.com/reference/stage_chart.php
https://www.teambuick.com/reference/stage_chart.php
Houtan
Member
Thanks for your replays,
I want to change my camshaft because my camshaft now on the engine is stock 1974 stage 1, what GM installed on the engine on 1974!! The car isn`t run many miles but when I bought the car sadly engine had some problems mainly because of modern API engine oils!! previews owner dosn`t care much about service the car, care about the engine and he hadn`t any knowledge about an engine, etc. and engine needs overhaul now. But I don`t want to going too far in modifications because the car is original, no parts changes, no upgrades and I want to save it that way.
Now in overhaul project only little changes in engine for some better specs:
I choose 1967 BBB 400 cylinder heads for better flow and smaller combustion chamber but I want to install 2.12, 1.75 Stage 1 valves on those heads with some machine shop etc., also I change intake with 1967 intake, It is lighter and simpler because they have not those emission control parts Also I guess they have better flow.
Also I choose KB silv-o-lite 1730H 020 because they are Hypereutectic and I don`t want race with car and I want to go for forged pistons clearance problems. with those heads that I choose I guess my engines specs will be close to 1970 stage 1 engines and 1970 stage 1 engines if I remember are 10.5:1 But with those pistons in my calculations I can`t go upper than 9.5:1 in other hand using some octane boosters isn`t problem but i don`t know pump gas with octane booster is good for high compression ratio or I must use race fuel.
and at the end I want to choose camshaft but I don`t want to go too far, Because of it I want to know what was my original camshaft specs to choose a similar camshaft with some tune but not too far to going to high RPM idle and choppy idle, If stage 1 camshafts are different between 1970 to 1974, I guess I must look at 1970 specs for my base specs?
So with those information and what you thinking about cam specs? because I saw many different specs in internet about Stage 1 stock specs and I don`t know what is my base specs for choosing camshaft.
I want to change my camshaft because my camshaft now on the engine is stock 1974 stage 1, what GM installed on the engine on 1974!! The car isn`t run many miles but when I bought the car sadly engine had some problems mainly because of modern API engine oils!! previews owner dosn`t care much about service the car, care about the engine and he hadn`t any knowledge about an engine, etc. and engine needs overhaul now. But I don`t want to going too far in modifications because the car is original, no parts changes, no upgrades and I want to save it that way.
Now in overhaul project only little changes in engine for some better specs:
I choose 1967 BBB 400 cylinder heads for better flow and smaller combustion chamber but I want to install 2.12, 1.75 Stage 1 valves on those heads with some machine shop etc., also I change intake with 1967 intake, It is lighter and simpler because they have not those emission control parts Also I guess they have better flow.
Also I choose KB silv-o-lite 1730H 020 because they are Hypereutectic and I don`t want race with car and I want to go for forged pistons clearance problems. with those heads that I choose I guess my engines specs will be close to 1970 stage 1 engines and 1970 stage 1 engines if I remember are 10.5:1 But with those pistons in my calculations I can`t go upper than 9.5:1 in other hand using some octane boosters isn`t problem but i don`t know pump gas with octane booster is good for high compression ratio or I must use race fuel.
and at the end I want to choose camshaft but I don`t want to go too far, Because of it I want to know what was my original camshaft specs to choose a similar camshaft with some tune but not too far to going to high RPM idle and choppy idle, If stage 1 camshafts are different between 1970 to 1974, I guess I must look at 1970 specs for my base specs?
So with those information and what you thinking about cam specs? because I saw many different specs in internet about Stage 1 stock specs and I don`t know what is my base specs for choosing camshaft.
You are always happier with less cam than more cam. This is always ignored by those that want a lumpy idle.
I would suggest that you will be happiest with a cam from the middle of this selection guide:
https://www.teambuick.com/forums/content.php?322-Buick-400-430-455-Street-Cam-Selection-Guide
I would suggest that you will be happiest with a cam from the middle of this selection guide:
https://www.teambuick.com/forums/content.php?322-Buick-400-430-455-Street-Cam-Selection-Guide
Houtan
Member
at the end I have 2 candidates:
Howard cams 550101-12 lift: 0.448, 0.474 Duration: 205. 215 Lobe separation: 112 RPM 1000-5000
Howard cams 550121-12 lift: 0.474, 0.496 Duration: 215. 225 Lobe separation: 112 RPM 1200-5200
But I don`t know if my second choose works fine with my 1967 stock intake that I choose for my 455 and my stock exhaust and what it will act at lower than 1200 RPM? Please inform me if you have any Idea about it.
Howard cams 550101-12 lift: 0.448, 0.474 Duration: 205. 215 Lobe separation: 112 RPM 1000-5000
Howard cams 550121-12 lift: 0.474, 0.496 Duration: 215. 225 Lobe separation: 112 RPM 1200-5200
But I don`t know if my second choose works fine with my 1967 stock intake that I choose for my 455 and my stock exhaust and what it will act at lower than 1200 RPM? Please inform me if you have any Idea about it.
Anyone looking to pick a camshaft should familiarize themselves with Dynamic Compression Ratio. Read this article,
http://www.empirenet.com/pkelley2/DynamicCR.html
At the end is a calculator you can use to see how different cams react to changes in static compression. I can tell you that advertised compression ratios were not accurate. Factory pistons were frequently as much as .050 below the deck at TDC. If you are going to rebuild the engine, you have many good affordable options now. You can easily build a 470 or 482. Read this article on the 470,
http://www.trishieldperformance.com/470--what-and-why-.html
It was written some time ago. Nowadays, there are very affordable piston and rod options and you can customize pistons to get to 0 deck and tailor your static compression ratio.
Also, if you can afford it, you should look into aluminum heads. Out of the box, they will outflow most if not all ported iron heads. Head flow is where all the power potential of an engine is.
Some stock 455 Stage1 camshaft information below.
http://www.empirenet.com/pkelley2/DynamicCR.html
At the end is a calculator you can use to see how different cams react to changes in static compression. I can tell you that advertised compression ratios were not accurate. Factory pistons were frequently as much as .050 below the deck at TDC. If you are going to rebuild the engine, you have many good affordable options now. You can easily build a 470 or 482. Read this article on the 470,
http://www.trishieldperformance.com/470--what-and-why-.html
It was written some time ago. Nowadays, there are very affordable piston and rod options and you can customize pistons to get to 0 deck and tailor your static compression ratio.
Also, if you can afford it, you should look into aluminum heads. Out of the box, they will outflow most if not all ported iron heads. Head flow is where all the power potential of an engine is.
Some stock 455 Stage1 camshaft information below.
Attachments
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do the oil mods. the 74 should already have the large dia pickup tube.