Need some 307 advice - 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 10-30-2012, 06:30 PM
Registered User
 
Join Date: Oct 2012
Posts: 15
Wiki Edits: 0

Thanks: 15
Thanked 0 Times in 0 Posts
Need some 307 advice

Hey everyone, first time poster. I just came back from my overseas tour and thought it would be nice to get a project truck. Picked up a '68 chevy C20, hoping it had the 327, i got stuck with the old 307. Im looking for suggestions to get some horsepower out of this thing. I read that a lot of people said to trash it, but i want to see what shes got.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 10-30-2012, 06:39 PM
Faith - Respect - Trust
 
Last photo:
Join Date: Sep 2012
Location: Ontario
Age: 58
Posts: 3,508
Wiki Edits: 0

Thanks: 192
Thanked 621 Times in 561 Posts
Welcome, how far did you want to go on the horsepower. The 307 was never a popular motor to build for performance. I don't believe they ever made a 307 with heads that didn't suffer from asthma. Again depending on what you want, a different set of heads would be a place to start...then there's the intake, if I'm right they where all 2 barrels. If you wanted to I'm sure you could make it go fast if you threw a bunch of parts and money at it.
Reply With Quote Quick reply to this message
The Following User Says Thank You to 69 widetrack For This Useful Post:
rube'68'03 (10-30-2012)
  #3 (permalink)  
Old 10-30-2012, 06:44 PM
Registered User
 
Join Date: Oct 2012
Posts: 15
Wiki Edits: 0

Thanks: 15
Thanked 0 Times in 0 Posts
Well seeing as how the only way i could determine which i had between the 327, and 307 was to pull a head and measure a cylinder, i might as well get some new heads. I already picked up a edelbrock high rise intake and 600cfm carb. I have some headers for it and an msd streetfire distributer. I would like to know where to go as far as heads, should i upgrade my cam, lifters, rocker arms, things of that nature.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 10-30-2012, 06:53 PM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 7,429
Wiki Edits: 0

Thanks: 292
Thanked 708 Times in 683 Posts
think of your 307 as a stroker 283. 275 to 325 horse power would be as far as I would go. very simple build.Any decent small chamber heads, camel bump 194s or 202s, that 600 carb you bought,small dual plane z-28 clone manifold,9.5:1 CR , small solid flat tappet cam,(hydraulic if you must) small tube headers, good to go, balance the crank/rods/pistons. If you find other cheap heads,as long as they flow 200 cfm on the intake side and the exhaust side is cleaned up. Tune the engine for your cars application.
Reply With Quote Quick reply to this message
The Following User Says Thank You to vinniekq2 For This Useful Post:
rube'68'03 (10-30-2012)
  #5 (permalink)  
Old 10-30-2012, 06:53 PM
Faith - Respect - Trust
 
Last photo:
Join Date: Sep 2012
Location: Ontario
Age: 58
Posts: 3,508
Wiki Edits: 0

Thanks: 192
Thanked 621 Times in 561 Posts
Again, how fast do you want to go, or how much power do you want to make. If your going to a head that's going to increase compression and by how much, then will the bottom end hold up. If you are getting new heads a more aggressive cam would help it breathe.

Many aftermarket heads out there, or even factory 194 or 202 heads, but remember all your parts need to work in conjunction with each other. Just because somebody puts a cylinder head on their engine with big valves doesn't mean the engine will make a bunch more power.

If you where to lay out a budget of how much you want to spend and let the Guru's here know how much power you want to make I'm sure you will have an engine you are happy with...You need a budget and plan first.

Ray
Reply With Quote Quick reply to this message
The Following User Says Thank You to 69 widetrack For This Useful Post:
rube'68'03 (10-30-2012)
  #6 (permalink)  
Old 10-30-2012, 06:59 PM
Registered User
 
Join Date: Oct 2012
Posts: 15
Wiki Edits: 0

Thanks: 15
Thanked 0 Times in 0 Posts
$1200 budget. I honestly dont know much about heads what what works better on which application. So, if you had the 1200 to put into this, what would y'all do? Guru away my friends...
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 10-30-2012, 07:25 PM
How fast is fast enough?
 
Last photo:
Join Date: Jun 2005
Location: St. Louis, MO
Age: 29
Posts: 8,691
Wiki Edits: 0

Thanks: 17
Thanked 282 Times in 262 Posts
$1200 budget? Swap in a $400 junkyard 350, spend a few hundred on a swap meet intake, headers, and a basic cam kit, and spend the rest on a mild torque converter.

The grin on your face will be twice as wide.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 10-30-2012, 07:28 PM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 7,429
Wiki Edits: 0

Thanks: 292
Thanked 708 Times in 683 Posts
you are going to have to get your hands dirty. look for some 194s and do a basic stock rebuild.mild cam,probably get stuck with a hydraulic flat tappet
Reply With Quote Quick reply to this message
The Following User Says Thank You to vinniekq2 For This Useful Post:
rube'68'03 (10-30-2012)
  #9 (permalink)  
Old 10-30-2012, 07:39 PM
Registered User
 
Join Date: Oct 2012
Posts: 15
Wiki Edits: 0

Thanks: 15
Thanked 0 Times in 0 Posts
Im ready to get my hands dirty. I thought about getting a 350 but the truck itself is in amazing shape so i would like to keep the motor somewhatat original. Are the 194's hard to come by? Do you think its worth it to bore it out to a 327?
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 10-30-2012, 07:44 PM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 7,429
Wiki Edits: 0

Thanks: 292
Thanked 708 Times in 683 Posts
not likely you can bore it to 327.first decide what you want. 307s mostly have cast cranks. keep power levels low. If you want power do what ap said,go 350. if you want a fun 307,build it mostly stock like what I first posted. camel bump heads are era correct but not 307 correct. they are cheap.
Reply With Quote Quick reply to this message
The Following User Says Thank You to vinniekq2 For This Useful Post:
rube'68'03 (10-30-2012)
  #11 (permalink)  
Old 10-30-2012, 07:46 PM
Registered User
 
Join Date: Oct 2012
Posts: 15
Wiki Edits: 0

Thanks: 15
Thanked 0 Times in 0 Posts
Ok, sounds like a good start. Do you have a suggested seller for the heads?
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 10-30-2012, 08:23 PM
American Muscle's Avatar
305 Turbo-Fire 240hp
 
Last photo:
Join Date: Dec 2008
Location: under the hood
Age: 31
Posts: 625
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Quote:
Originally Posted by rube'68'03 View Post
Ok, sounds like a good start. Do you have a suggested seller for the heads?
I would suggest rebuilding the engine with all orginal parts. Freshing up heads etc. Then bolt on all the things you mentioned you had( headers etc). Then id swap out rear gears. if its an automatic id opt for a 700r4 with 373 gears. If manual it should alreafy have steep gears. Point being, my first performance purchase would be a new set of gears. Just my two cent
Reply With Quote Quick reply to this message
The Following User Says Thank You to American Muscle For This Useful Post:
rube'68'03 (10-30-2012)
  #13 (permalink)  
Old 10-30-2012, 08:50 PM
Registered User
 
Join Date: Oct 2012
Posts: 15
Wiki Edits: 0

Thanks: 15
Thanked 0 Times in 0 Posts
I need to first find out what gears it has. I was told it has an eaton rear end and i have no idea if thats stock, and either way im unaware of whats inside.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 10-31-2012, 12:40 AM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,591
Wiki Edits: 326

Thanks: 700
Thanked 885 Times in 752 Posts
Quote:
Originally Posted by ap72 View Post
$1200 budget? Swap in a $400 junkyard 350, spend a few hundred on a swap meet intake, headers, and a basic cam kit, and spend the rest on a mild torque converter.
The grin on your face will be twice as wide.
Makes sense to me.
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 10-31-2012, 01:23 AM
Valkyrie5.7's Avatar
www.generationhighoutput. com
 
Last wiki edit: Painting chrome wheels
Last journal entry: Stopping my journal entries here
Last photo:
Join Date: Feb 2010
Location: Phoenix
Age: 27
Posts: 897
Wiki Edits: 15

Thanks: 147
Thanked 71 Times in 62 Posts
For a $1200 budget you can't go wrong with a junkyard 350.

If you plan on building up the 307, it's a lot like building up the 305 except it has a slightly better bore and a much worse reputation. As said before it shares it's bore with the 283 and it's stroke with the 327. Thanks to quality control issues these engines get avoided like the plague. There's a couple 3rd gen f-body guys on here that know the 305 well and have probably given great advice a million times on how to make power with them. Search the user "F-BIRD'88" on here and I'm sure you'll get a wealth of information on how to make great power with small cubes.
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
a different 307 sbc build, need some advice v8fbrx7 Engine 107 07-25-2012 12:53 PM
Experienced painters advice please! Advice on painting a frame El Campo Hotrodding Basics 25 03-13-2012 03:21 PM
Chevy 307 - POB 307? El C Engine 13 10-15-2009 04:05 AM
Seeking advice on rough idle; "Y" code 307.. Oldsmolac911 Engine 1 11-14-2002 12:25 AM


All times are GMT -6. The time now is 11:48 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.