350 Budget Engine Build - 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 07-26-2010, 11:57 AM
Registered User
 
Join Date: Jul 2010
Location: St. Louis, MO
Posts: 12
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
350 Budget Engine Build

I have been a long time lurker but finally decided to get a user name because I have been unable to find specific answers to what the best bang for my buck build would be. I figured there are no better people to ask than you guys!

We are in the process of building a street stock to run next season at our local dirt oval tracks and the engine building game is completely new to me. I have no doubt in our ability to make the car handle, I just want to make sure we dont get out motored. Here are the rules we have to run:

CARBURETORS: Stock OEM Two (2) barrel carburetor, NO HOLLEY’S!!! Carburetor to be mounted to manifold. No adapter plates. Choke can be removed. G.M. Rochester, Ford Autolite & Chrysler will be allowed. Rochester’s will be allowed to Run Holley Jets. Venturi Size: 1 3/8” Butterfly Size: 1 11/16” MAXIMUM! MUST FIT TRI-CITY TECH GAUGES, NO EXCEPTIONS!
FUEL PUMPS: OEM Style block mounted fuel pumps will be allowed. No electric fuel pumps allowed. No pressure regulators or bypass returns of any type will be allowed.
INTAKE MANIFOLDS: Cast iron OEM intake, NO MODIFICATIONS of any type allowed. No grinding, machining, acid porting or polishing of any kind will be allowed. Weight must be OEM.
EXHAUST: Collector Type Headers will be allowed. Exhaust must run past rear of transmission.
FLYWHEEL & CLUTCH: Stock OEM flywheel (no aluminum). Stock single disk clutch and pressure plate per make of engine. Explosion proof bell housing required (scatter shields). Automatic transmissions to run explosion proof blanket or 1/4" steel scatter shield over converter. Automatics must have a working torque convertor.
HEADS: Engines and head castings - single valve spring only, screw-in stud guide plate OK. NO MILLING OR CUTTING OF VALVE SPRING SEATS TO ALLOW USE OF LARGER VALVE SPRINGS, MUST USE STOCK OEM VALVE SPRINGS! 
A. GM-350 CID, to use these castings only 487-882-997-624-126-493-185-339-441-993 
B. GM 305 CID, to use these castings 434-450-416-896-520-601- Intake: 1.940 Exhaust 1.500 MAXIMUM! 
C. FORD 351 W CID C90E - Intake: 1.940 Exhaust: 1.500 MAXIMUM
D. Chrysler 360 CID - Intake: 1.880 Exhaust: 1.600 MAXIMUM
NO PORTING OR POLISHING OF ANY KIND WILL BE ALLOWED! 
NO EXTENSIVE MILLING OR ANGLE MILLING WILL BE ALLOWED! 
COMBUSTION CHAMBERS MUST REMAIN WITHIN 3cc’s of STOCK

PISTONS: Flat top or dish pistons only! NO GAS PORTED PISTONS! 
MAXIMUM .060 OVERBORE ALLOWED ON ALL MAKE & MODEL!!
CRANKSHAFT & CONNECTING RODS: Stock OEM crankshaft & connecting rods, no aftermarket rotating assemblies will be allowed. Stock stroke (must match block #’s), No polishing, knife edging, chroming or lightning of crankshafts or connecting rods allowed. Balancing will be permitted.
IGNITION: Stock type HEI or point type distributors and parts. No Aftermarket Coils, MSD Ignition, or magnetos.
OIL PANS: "Claimer" style pans allowed. Inspection plug will be MANDATORY & must be inline with the #3 cylinder. Must be a minimum of 1/2" pipe!
CAMSHAFT, LIFTERS & ROCKER ARMS: Hydraulic/non roller only, stamped steel rocker arms only, no roller rockers or roller tip rockers.

If anyone could help me out in which combination would be the best bang for my buck to run I would really appreciate it!

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 07-26-2010, 02:53 PM
bigdog7373's Avatar
Of course it's fast
 
Last photo:
Join Date: May 2010
Location: florida
Posts: 2,673
Wiki Edits: 0

Thanks: 13
Thanked 49 Times in 49 Posts
Those are some pretty strict rules! Why can't you use a holley carb?
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 07-26-2010, 02:57 PM
Registered User
 
Join Date: Jul 2010
Location: St. Louis, MO
Posts: 12
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by bigdog7373
Those are some pretty strict rules! Why can't you use a holley carb?
They really are! And I'm not sure but they tech regularly.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 07-26-2010, 03:03 PM
Registered User
 
Last photo:
Join Date: Apr 2010
Location: Hawaii
Posts: 373
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
What's the winning purse? Must be a pain to have to break it down every time you win...PLUS, have to replace gaskets. Hope the money is worth it.

P.S. Sounds like Bomber-class with all those rules.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 07-26-2010, 03:04 PM
bigdog7373's Avatar
Of course it's fast
 
Last photo:
Join Date: May 2010
Location: florida
Posts: 2,673
Wiki Edits: 0

Thanks: 13
Thanked 49 Times in 49 Posts
Check out some of the circle track engines on from jegs and build yours similar to one of them. Here are some that i found:
http://www.jegs.com/i/Blueprint+Engi...11CT1/10002/-1
http://www.jegs.com/i/GM+Performance...58602/10002/-1
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 07-26-2010, 03:18 PM
Hippie's Avatar
Analog man in a digital world.
 

Last journal entry: HEI comparison.
Last photo:
Join Date: May 2003
Posts: 2,255
Wiki Edits: 0

Thanks: 3
Thanked 5 Times in 5 Posts
I know the early 400 SBC factory 2 bbl. intakes accepted the larger Rochester 2GC's if that helps you any.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 07-26-2010, 06:30 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,599
Wiki Edits: 326

Thanks: 701
Thanked 889 Times in 756 Posts
Is there a rule limiting the fuel you can use?
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 07-26-2010, 07:04 PM
GMC boogie's Avatar
Member
 
Last photo:
Join Date: Nov 2004
Location: Louisiana
Age: 48
Posts: 613
Wiki Edits: 0

Thanks: 1
Thanked 18 Times in 18 Posts
Is there a vacuum or lift rule on the camshaft?
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 07-26-2010, 07:44 PM
Registered User
 
Last photo:
Join Date: Oct 2009
Location: Seattle
Posts: 312
Wiki Edits: 0

Thanks: 0
Thanked 14 Times in 11 Posts
"Rochester’s will be allowed to Run Holley Jets. Venturi Size: 1 3/8” Butterfly Size: 1 11/16” MAXIMUM!"

that's the largest Rochester 2GC, rated 435cfm, minus choke you will not miss the Holley 500cfm. I don't think Ford or Chrysler have them that large. The carb will be the limiting factor.

if there is a flat weight limit, go for a 350
if the limit is lbs/cid go for a 305, 601 heads, 1.84/1.50 valves, bigger just get shrouded

You said best bang for the buck, 305s are virtually free, same stroke as the 350 and the heads will not limit this with a 2bbl.

Have fun with it.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 07-26-2010, 08:00 PM
sqzbox's Avatar
My pipes are my music
 
Last photo:
Join Date: Sep 2009
Location: indiana
Age: 64
Posts: 2,938
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
using a cross over pipe will net you a few more ponies! Other than that, tire size, rims, and backspacing will help with the traction.
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 07-26-2010, 08:47 PM
Turdpolisher's Avatar
Registered User
 
Last photo:
Join Date: Mar 2010
Location: Georgetown, Texas
Posts: 35
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
350 engine build

I helped a friend go through this exercise several years ago. Here's some suggestions I had for him:
These "tight ruled" classes are ment to keep the motors pretty equal so very little gains can mean big advantages.
Bore it .060 over as the rules allow - bigger cubic inches
Reduce rotating mass by using aluminum pistons - spins faster - quicker.
Use thinnest head gaskets possible (I think there is thin copper available for 350 Chevy) for higher compression.
Use smallest CC heads that have maximum intake/exhaust valve sizes for higher compression.
Use smallest/lightest harmonic balancer possible - lowers rotating mass.
Use smallest alternator possible and cut down or remove fan to cut drag. Use a larger than stock pulley for reduced drag.
Use low flow water pump with oversize pulley for less engine drag.
Install crossover pipe in exhaust to scavenge waste gases from cylinders.
Remember - look for small advantages in reduced drag on the engine - saving 25 to 30 hp rather than trying to make it.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 07-26-2010, 08:56 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,599
Wiki Edits: 326

Thanks: 701
Thanked 889 Times in 756 Posts
Good post by Turdpolisher. To expand on his thinking, here is a book I have owned in the past that everyone should own. It has 1001 little tips and tricks that you may never think of on your own.
http://www.amazon.com/1001-More-High...0195256&sr=1-5
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 07-26-2010, 10:50 PM
sqzbox's Avatar
My pipes are my music
 
Last photo:
Join Date: Sep 2009
Location: indiana
Age: 64
Posts: 2,938
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
1001 tips

Damit Tech, why did you put that on there?
At $2.30 I bought it!

Now I gotta hide it from the wife!
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 07-26-2010, 11:18 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,599
Wiki Edits: 326

Thanks: 701
Thanked 889 Times in 756 Posts
Quote:
Originally Posted by sqzbox
Damit Tech, why did you put that on there?
At $2.30 I bought it! Now I gotta hide it from the wife!
I know, I was looking for my copy and couldn't find it, so I bought another one today.
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 07-27-2010, 07:24 AM
Registered User
 
Join Date: Jul 2010
Location: St. Louis, MO
Posts: 12
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by a1supersport
What's the winning purse? Must be a pain to have to break it down every time you win...PLUS, have to replace gaskets. Hope the money is worth it.

P.S. Sounds like Bomber-class with all those rules.
Ya it really is similar to a bomber class but I am glad because it does keep costs down. Especially compared to what we are used to in the modified class. The purse is $450 to win and $50 to start so I think it is worth it, it doesnt hurt that we absolutely love the sport!
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
the history of chevy v8's savman1 Hotrodders' Lounge 43 03-02-2012 06:57 PM
Distributor Tuning and Theory - Part 1 Rick WI Engine 35 04-26-2011 12:38 AM
350 block/$2000 budget/forum build American Muscle Hotrodding Basics 19 01-26-2009 08:15 AM
350 engine build BLUE82 Introduce Yourself 3 12-01-2006 08:17 PM
350 build up opinions? Artemis Entreri Engine 17 08-09-2006 01:48 PM


All times are GMT -6. The time now is 04:34 AM.


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.