best 305 build - Page 2 - Hot Rod Forum : Hotrodders Bulletin Board -- 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
lost password?   |   register now

LinkBack Thread Tools
  #16 (permalink)  
Old 06-12-2005, 07:18 PM
Mad Maggot's Avatar
The lean mean donut machine
Last photo:
Join Date: Aug 2004
Location: Red Deer, Alberta, Canada
Age: 34
Posts: 386
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
If you already have the 305 engine or at least it's short block, it's probably the cheapest and easiest way to 300 HP. Any more than that or if you want more low end torque it will be better to get a 350. If you can get a 350 without shelling out more than a few hundred bucks it's probably a good idea to get it, otherwise stick with the 305. Here's a setup that should get you close to the 300 HP mark:

Holley/Demon 600 cfm carb
Edelbrock RPM Air Gap manifold
Comp Cams XE262 cam (218/224 @ .050, .462/.469 lift)
14014416 casting 305 heads - these are the best of the 305 heads
1-5/8" headers with at least 2-1/2" single or 2-1/4" dual exhaust
Aftermarket HEI Ignition (Mallory, Accel, etc.)

Check out this link for a 343 HP 305.

They used a higher compression ratio, slightly ported heads, and a little lumpier cam than the combo I suggested.

The reason most attempts at building a good 305 end up being an exercise in futility is because many don't have the 14014416 casting heads. These heads have a tall short side radius, a smoother exhaust runner, and a larger 165cc intake port. If you don't have the 14014416 heads I wouldn't try building a 305.

Reply With Quote Quick reply to this message
Sponsored Links
  #17 (permalink)  
Old 06-14-2005, 10:20 AM
Last photo:
Join Date: Jun 2005
Location: St. Louis, MO
Age: 31
Posts: 9,544
Wiki Edits: 0

Thanks: 20
Thanked 404 Times in 377 Posts
The last combo mentioned is actually pretty damn good. But if you're tearing down the short block and starting from scratch you'll not only make more power with a 350, but it'll be just slightly cheaper. Do yourself a favor and spend a Saturday in a yard pulling a 350- a complete engine is like 200 bucks. (I got one for $50 once, but that's cause I carried out the top end on my back with a limp- they just wanted me out of there). A well tuned 305 will get slightly better gas milage but if you're serious about going fast and are going to use hipo parts, the MPG's begin to equalize.
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


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
What is the best way to build up a chevy 305? sugarmonkey Engine 45 12-19-2009 05:26 AM
305 ho engine build up, what do you think? 406 ss monte Engine 7 11-21-2004 12:28 PM
305 build up camarodriver Hotrodding Basics 5 11-16-2004 01:30 AM
305 build up shane7643701 Engine 12 06-03-2003 08:29 AM
305 build 72vegaman Engine 9 01-20-2003 07:45 PM

All times are GMT -6. The time now is 10:26 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999 - 2012. All Rights Reserved.