Which Camshaft for mild 350 chevy - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 11-07-2013, 09:45 AM
Registered User
 
Join Date: Nov 2013
Posts: 2
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Which Camshaft for mild 350 chevy

I have a Chevy 350 small block I am building for my 59 apache. It will be a daily driver for the street. However I want a better cam than stock and I just not sure what to choose. Information overload! Engine specs are stock bore and pistons with 64 cc 186 heads. figures out about to be about 9.5 compression. Will be running a Holley 650 carb. Also a automatic transmission, not sure if it will be a 700R4 or a 350 turbo. Any help will be appreciated. Thanks

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 11-07-2013, 10:00 AM
Proud LOSER
 
Last photo:
Join Date: Mar 2008
Location: Ottawa
Posts: 1,821
Wiki Edits: 0

Thanks: 55
Thanked 256 Times in 222 Posts
Quote:
Originally Posted by JR4949 View Post
I have a Chevy 350 small block I am building for my 59 apache. It will be a daily driver for the street. However I want a better cam than stock and I just not sure what to choose. Information overload! Engine specs are stock bore and pistons with 64 cc 186 heads. figures out about to be about 9.5 compression. Will be running a Holley 650 carb. Also a automatic transmission, not sure if it will be a 700R4 or a 350 turbo. Any help will be appreciated. Thanks
Can't got wrong with a good old 268

http://www.summitracing.com/int/part...46-4/overview/
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 11-07-2013, 11:47 AM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,946
Wiki Edits: 326

Thanks: 760
Thanked 1,012 Times in 848 Posts
I'd like to see more exhaust duration than intake duration (dual-pattern cam) with production iron heads. If the motor is truly 9.5:1, then this offering from Crane would be my choice, closing the intake valve at 35 degrees after bottom dead center. That will make a Dynamic Compression Ratio of 8.368:1, just right for a street motor on pump gas. Would work better with a looser torque converter and numerically higher rear gear.

Crane part number 113941
Grind number H-272-2
Good low end and mid range torque and HP, good idle,
daily usage and off road, towing, performance and fuel
efficiency, marine applications, 2600-3000 cruise RPM, 8.75 to
10.75 compression ratio advised, good w/plate nitrous
system. (50 state legal, pre-computer, C.A.R.B. E.O.
D-225-18).
Operating range 1800-5600 rpm's
Valve lift 0.454"/0.480"
Advertised duration (0.006") 272/284
0.050" duration 216/228
Cam timing events 1-35-51-(3)
113941 99277-16 216 272 112 1 35 .000 .454
113942a 228 284 51 (3) .000 .480
Use Crane 99848 valve springs that require no machining in the spring pockets.....
http://www.summitracing.com/parts/cr...8-16/overview/

Since we're suggesting a flat tappet hydraulic camshaft to the OP, we also need to advise him of the perils of using such an apparatus....
http://www.crankshaftcoalition.com/w...ips_and_tricks
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 11-07-2013, 01:51 PM
Registered User
 
Join Date: Nov 2013
Posts: 2
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
What stall speed of a converter should I use if I go with the crane cam #113941
you recommended. I am concerned about MPG. as I plan on driving it pretty regularly. Maybe this cam is possibly too much. let me know, Thanks for the help.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 11-07-2013, 01:55 PM
Registered User
 
Last photo:
Join Date: Mar 2010
Location: st. louis missouri
Posts: 190
Wiki Edits: 0

Thanks: 9
Thanked 10 Times in 10 Posts
I'd definitely stay smaller with the cam. Tech recommended a good one. You can request a cam from the big manufacturers for free. I'd double tap with that. You can fill out the whole deal online, just gotta know some particulars about your engine and vehicle. If you have power brakes, or want to upgrade to them, I'd look at something akin to Comp Cams 256h or so
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 11-07-2013, 02:01 PM
Proud LOSER
 
Last photo:
Join Date: Mar 2008
Location: Ottawa
Posts: 1,821
Wiki Edits: 0

Thanks: 55
Thanked 256 Times in 222 Posts
Quote:
Originally Posted by techinspector1 View Post
I'd like to see more exhaust duration than intake duration (dual-pattern cam) with production iron heads. If the motor is truly 9.5:1, then this offering from Crane would be my choice, closing the intake valve at 35 degrees after bottom dead center. That will make a Dynamic Compression Ratio of 8.368:1, just right for a street motor on pump gas. Would work better with a looser torque converter and numerically higher rear gear.

Crane part number 113941
Grind number H-272-2
Good low end and mid range torque and HP, good idle,
daily usage and off road, towing, performance and fuel
efficiency, marine applications, 2600-3000 cruise RPM, 8.75 to
10.75 compression ratio advised, good w/plate nitrous
system. (50 state legal, pre-computer, C.A.R.B. E.O.
D-225-18).
Operating range 1800-5600 rpm's
Valve lift 0.454"/0.480"
Advertised duration (0.006") 272/284
0.050" duration 216/228
Cam timing events 1-35-51-(3)
113941 99277-16 216 272 112 1 35 .000 .454
113942a 228 284 51 (3) .000 .480
Use Crane 99848 valve springs that require no machining in the spring pockets.....
http://www.summitracing.com/parts/cr...8-16/overview/

Since we're suggesting a flat tappet hydraulic camshaft to the OP, we also need to advise him of the perils of using such an apparatus....
http://www.crankshaftcoalition.com/w...ips_and_tricks
Your right about the flat tappet of course, but given the low lift and low spring pressure required I don't find them as scary in a mild street build as something a little more serious or as something as abusive as the XE or Voodoo cams.

The only reason I went with the 268H was strictly based on less then optimum converter and gear choice found in most street rod style builds. More times then not, especially with a 700r4 they wind up with stock or "vette" style converter and 342ish gearing. The 268 will happily lug along at lower rpm and not require a better then stock converter to idle comfortably.

Now if its going to get an OD trans, a set of 411's (tall truck tires) and at minimum 2500+ converter I would choose something else.....and your gonna hate me for this one...,,but in my head I see a cool cruiser style pickup that has enough snot to turn the tires and sound real cool when I'm out cruising....
Yes...I really would choose this
http://www.summitracing.com/int/part...make/chevrolet
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 11-07-2013, 04:35 PM
Registered User
 
Join Date: Jun 2010
Location: TX
Posts: 1,182
Wiki Edits: 0

Thanks: 0
Thanked 105 Times in 96 Posts
For a SB Chevrolet, a Comp Cams 255DEH is hard to beat for a stock truck engine. It is a camshaft with short duratuon and high valve lift. That is commonly called a "RV cam". It has 203/212 degrees duratuion and .421"I / .451"E valve lift. The stock stall is OK and you can maintain your freeway flyer rear gears and 29" tires. .
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
chevy 350 w/ mild cam.. idle/gear probs foodstamp Engine 17 09-26-2012 05:46 AM
chevy 350 mild motor jeremy1992 Engine 15 01-03-2012 01:45 PM
Mild build chevy 350 guts question dadicted Engine 16 10-19-2009 06:26 PM
Camshaft recommendation for a mild 305 SBC willys36@aol.com Engine 7 04-16-2009 09:06 AM
mild 327 or mild 350 adam15425 Engine 3 10-20-2004 04:17 PM


All times are GMT -6. The time now is 02:39 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.