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cam confusion!

 
primer72
I love my Chevy Chevette!
Posts: 2
Joined: 04/13
Posted: 04/30/13 05:27 PM

im in the process of my first engine build and dont have a clue when it comes to camshafts. Any thoughts on wer to start the great debate? Its a 355 4 boltmain and i plan for an edelbrock performer intake and 750 carb. It will be in a nova with a 4spd and probly 4:11 gears. my ears are open. ive read alot but would like to hear from someone who has this setup and not from a summit ad.thanks  

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p2-72chevelle383
I mow my lawn and find Chevys
Posts: 1757
Joined: 08/09
Posted: 05/01/13 11:42 AM

If its in the budget go with a roller. How much power do you wanna make. If you want a custom cam I know a great cam guy. Look up chris straub at straub technologies  
p2-72chevelle383

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skyeking
I mow my lawn and find Chevys
Posts: 2738
Joined: 08/09
Posted: 05/01/13 05:07 PM

Hi there,
 A 750 carb of any make is an over gun choice for the performer manifold which
 is gone at 5300 on average. Most good cams are power for 5800 despite claims
 for more.
   With my 355 I had a performer manifold and dynoed 4 carbs..one B/Grant
 650v/s  one Holley 600v/s and one Holley 750 v/s and a Holley 600 DP. the
  flat tappett cam was from a 290 HP motor.
  and the 600DP gave the best response with slight cost for fuel..
[ Of Course.]
  If you want to get a good compromise I would suggest this if you need a warm
 roller cam which is superior in all aspects.Compression of 9.4+ is desirable.

  Option 2200000001,
  Cam ..218/218 with about 480/1000" lift if your heads are suited..At least 180s
  Comp = 9.4 to 10.1 desirable. Next best performer+ manifold   1.5 rockers only.
  Carby???...Economy 650 Holley with vacuum 2nds or 650DP for rice burning.
   The choices are many and this combo is reliable and wont drive you nuts.  
skyeking

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zman123
Everything in my driveway’s a Chevy
Posts: 537
Joined: 06/08
Posted: 05/02/13 06:35 AM

I know bigger sounds better but that is not always the case. A 600-650 cfm carb is plenty  for a 350.My 350 made over 400HP on a dyno with a 670 Edelbrock and gets 20MPG (in overdrive) on the freeway.  

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68scott385
I mow my lawn and find Chevys
Posts: 1994
Joined: 10/09
Posted: 05/02/13 09:28 AM

IMO, a cam with a .050 duration of 220* or less will work well with what you already have. Any bigger and your intake won't breathe well in the upper rpm range where the engine will make its best power.  
68scott385 68scott385 68scott385

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primer72
I love my Chevy Chevette!
Posts: 2
Joined: 04/13
Posted: 05/03/13 03:56 PM

u guys gave me alot to think about. thanks for the insight. im glad i finally have my project in the garage sitting instead of reading these forums and fantasizing about what im gona build "some day". im glad to be a part of the community finally Grin  

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busterrm2013
V-6 Camaros rule!
Posts: 46
Joined: 07/13
Posted: 07/09/13 10:32 PM

Depending on the wt of the vehicle, rear gear, and size of rear tire, performer RPM intake at least, 215-230 duration @050 cam with as much lift available for that duration, AFR 185 -195 aluminum heads would be great, 600-650 cfm carb, set of long tube headers w/free flowing exhaust, 3.73 - 4.11 rear gear. I would keep the dynamic CR about 8.25 to 1, and no more than .043 quench. You could safely use a .125 dome piston and keep you DCR at about 8.33 and use premium unleaded and be safe. You could run 350 -375 hp and 385-410 tq very easily.  

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