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what would be a good cam to use

 
chevyk15001
I love my Chevy Chevette!
Posts: 3
Joined: 01/13
Posted: 01/19/13 03:54 PM

hey im running an 84 chevy 350 with 97 chevy 305 vortec heads i am just wondering what would be a good idea for a cam size any help would be nice  

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tuffnuff
Moderator
Posts: 7841
Joined: 12/09
Posted: 01/19/13 06:22 PM

You will have to give these guys a lot more information, to get an educated response.
Type and year of vehicle
Weight
Rear gears
Tire size
Auto/standard
Engine mods
Intended use street/strip
Condition of engine/recent rebuild
etcetera

Smile  
When The Flag Drops.,.

tuffnuff

The Bull ***t Stops.,.
tuffnuff

P. Engineer, Engine Builder

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76Skylark
Big Block power for the win
Posts: 868
Joined: 12/11
Posted: 01/19/13 07:40 PM

If you Haven't done any thing to the Heads about a 450 lift cam is all but look up alex's parts see if that can give you any Ideas and then answer all of tuff's questions.

Lark, I added a quick link for Alex's Parts.,. hope you don't mind.,. tuffnuff Smile

http://www.alexsparts.com/valve-spring-kit-sb-chevy-vortec-hi-perf-hyd-roller/

Smile  

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skyeking
I mow my lawn and find Chevys
Posts: 2738
Joined: 08/09
Posted: 01/20/13 05:23 PM

214 straight up and downer with throat work out under the exhaust valves.  
skyeking

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chevyk15001
I love my Chevy Chevette!
Posts: 3
Joined: 01/13
Posted: 02/19/13 03:16 PM

for the more info you are looking for

it is a 1989 chevy k1500 regular short box

stock weight about 4500

stock gears

right now for tires im running 33 12.5 15 manual 5 speed

engine mods, 1997 305 vortec heads, edlebrock intake and carb 650cfm

intended use would be street and strip

engine has just been rebuilt
and i would like to put in a different tranny, one thats stronger and more durable and better for the strip thanks for the help  

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68scott385
I mow my lawn and find Chevys
Posts: 1994
Joined: 10/09
Posted: 02/19/13 06:25 PM

What ratio stock gears?

What parts, be specific, did you put in the rebuild?  Stock cast crank or aftermarket crank, cast or forged?

What type pistons? Cast replacements, hypereutectics, or forged?

What size valves?

What is the compression ratio?  
68scott385 68scott385 68scott385

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Bobs427
I love my Chevy Chevette!
Posts: 12
Joined: 02/13
Posted: 02/19/13 10:04 PM

with a 33" tall tire you can run a 4:33 rear gear to get some performance from the 350. I would suggest if you didn't put money into the 305 vortec heads. Not to use them. The amount of money needed to get them to work you can purchase a set of alunimum heads.

What are you looking for an Automatic or a Manual trans. There are so many different ways to go with making a package work.

A TH400 Trans with a 3500 convertor, and 26" tall tires you will need atleast a 4:10 rear gear. Good flowing heads, and a cam to do the work. Use roller rockers. The stamped steel junk is just that JUNK. The ratio's are way off from each rocker. We have seen steel rockers go from 1.3 to 1.5 and so lower and higher. It makes a difference when you add all the 8 cylinders together. Then we can pick out a cam. Now we need to know are you planning to run a Hydraulic Roller or a Flat tappet cam.

Bob Aka-pepsi1  

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chevyk15001
I love my Chevy Chevette!
Posts: 3
Joined: 01/13
Posted: 02/20/13 06:02 PM

alright for the parts that are going on it is just the stock 305 vortec heads, edlebrock peformer intake and an edlbrock 650 cfm carb until; i get a different one, and the parts that im looking to put into it are flow tech shorty headers, lunati voodoo barebones flat tappet cam and lifters kit 280/290 so it would have about.443" intake lift and about.465" exhaust lift  

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redneckjoe69
I mow my lawn and find Chevys
Posts: 2337
Joined: 03/10
Posted: 02/21/13 07:00 AM

not a bad cam choice.  
http://www.lunatipower.com/Product.aspx?id=2505&gid=309  

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Bobs427
I love my Chevy Chevette!
Posts: 12
Joined: 02/13
Posted: 02/21/13 03:00 PM

chevyK15001

With the Heavy Truck 4500 and a stock rear gear you don't want much duration to get that load rolling.

I found a Comp Cam or a Crane they maybe better for your application. But you can make that decision.
Comp P/N 12-207-2  Grind #255DEH
1200-5500 RPM  .203/.212 dur @.050  .421/.451 max lift with 1.5 rocker arm ratio
Good Torque, Good Mileage, Smooth Idle and good for towing.

Crane Cams
P/N2040 Grind 114132
1600-5400 RPM   .210/216 dur @.050 .440/.454 max lift with a 1.5 rockerarm ratio.

Either of those cams would be a good chose, the tall tire is killing your rear gear ratio. You'll need atleast a 4:33 rear gear to get in the ball park of any performance.

Bob  Aka-pepsi1  

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