best combo for 300hp 305 engine? - Page 2 - 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> Hotrodding Basics
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #16 (permalink)  
Old 08-22-2011, 02:43 PM
jmaine83's Avatar
Registered User
 
Join Date: Aug 2011
Location: florida
Posts: 28
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
thanks 454c10 its a truck engine right?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #17 (permalink)  
Old 08-22-2011, 02:54 PM
Member
 
Last photo:
Join Date: Dec 2004
Location: San Antonio, Texas
Age: 50
Posts: 4,023
Wiki Edits: 0

Thanks: 0
Thanked 23 Times in 23 Posts
yes truck/suv engine. factory roller cam with vortec heads.

get a complete engine from fan to flexplate.

pull the efi off and bolt on a vortec style carb intake.

You should be able to find one in good running condition.
Reply With Quote Quick reply to this message
  #18 (permalink)  
Old 08-22-2011, 03:04 PM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 59
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 597 Times in 546 Posts
Quote:
Originally Posted by jmaine83
what 350 should i look for 4 bolt main or 2 on what years are the best 70s 80s 90s and what casting# are the best?
If you want to use the factory roller cam set up PLUS score good heads (easy to get 400 HP w/them), look for a L31 Vortec engine that came in the Chevy, GMC 1996 through '99 full size trucks, Suburban and Tahoe; full size vans through '03, and the Cadillac Escalade through '00.

1986-Up 5.7L Roller Cam/Lifters Block Casting Numbers:
10243880
14011148
14088526
14093638 (one guy says has one w/o tapped holes, bosses were there).

1986-Up 5.7L flat tappet (i.e. non-roller) Block Casting Numbers:
10054727
14079287
14088548
14101148.
These flat tappet blocks may have the provisions for a roller cam (i.e. bosses cast in and tapped for the spider, tapped holes for the cam plate, etc.)- but very well may not be so equipped- but these blocks will have a flat tappet cam and non-roller lifters, no spider, etc.

There is a flat tappet block and a roller block that both end with the numbers 148. 14101148 is a flat tappet block, 14011148 is a roller cam block.

Some blocks came machined for a mechanical fuel pump. Others (most) have either partial or no machining done to use a mechanical F/P.

A member here posted the following regarding the fuel pump (sorry, I don't recall the name to give proper credit):
"All of the 638's that I've seen (not that many, 5 or 6) have had the pump rod hole drilled.
I've seen 880s both ways, and both 14011148 I've seen were undrilled."

About the quickest way to tell if you are looking at a roller engine in the junk yard, is to pull a valve cover and remove a push rod. Flat tappet p-rods are about 7.8, roller p-rods are much shorter at 7.2 long.

Remember the "good" 062 or 904 casting number Vortec heads are on 1996-up engines. The Vortec's are much sought after in the junkyards! So do what you need to, to get a leg up on the competition- even if it means slipping "Bruno" a torn-in half dove to get him to hit your cell ASAP when a Vortec hits the 'yard (other half when you score). Go early and stay late if you have the time and patience for it. The engine that comes into the 'yard in the morning will not be there by the end of the day- unless this is a VERY low volume business.

It also pays to check any vehicle that may have had a Vortec swapped into it- but those may have been hammered to death if they're still in the car.

The bottom end is the most likely point of failure. If a rod lets go in earnest, it'll dent or hole the pan. Something to check for, as well as making sure the engine will rotate freely, no water in the oil and vise versa, etc.
Reply With Quote Quick reply to this message
  #19 (permalink)  
Old 08-22-2011, 03:54 PM
jmaine83's Avatar
Registered User
 
Join Date: Aug 2011
Location: florida
Posts: 28
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
great posts 454c10 n cobalt 327 yall guys got my pen & paper smoking with great info Should i bored over da block 0.30?
Reply With Quote Quick reply to this message
  #20 (permalink)  
Old 08-22-2011, 04:24 PM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 59
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 597 Times in 546 Posts
Quote:
Originally Posted by jmaine83
great posts 454c10 n cobalt 327 yall guys got my pen & paper smoking with great info Should i bored over da block 0.30?
That would be 0.030" and yes if the block hasn't been bored already and you find that it needs to be bored. And I would hold out for a standard bore block to start the build with, blocks will sometimes have too thin cylinder walls if they're bored to 0.060".

If you find that you have to go 0.060" over, you should have the machine shop "sonic test" the cylinders for thickness to be sure they're thick enough. I've never had a problem going 0.030" over.
Reply With Quote Quick reply to this message
  #21 (permalink)  
Old 09-05-2011, 11:16 AM
Banned User
 
Last photo:
Join Date: May 2011
Location: N.E.
Posts: 385
Wiki Edits: 0

Thanks: 9
Thanked 6 Times in 6 Posts
What car is this going into?

Here we go again with the 350 vs. 305, 305 is crap thing again:

My best E.T.'s with my current truck:

L48 (crate) 350 = 16.8

LG3 305 = 17.9

So only 1 sec slower. This, by the way, is in a 3800lb truck with 2.56 rear gear. Also the 350 had a 4bbl while the 305 only has 2.

First, let me make it clear that i understand and agree that from a strictly performance standpoint the 350 BLOWS AWAY a 305. i can't argue that, because there is no argument. HOWEVER, i feel that a 305 can still perform well.

We have to look at what most 305's were installed in:
Most cars were not real light and most of them had very high gears in the 2.41-2.56 range for emmissions reasons.
What kind of intake/exhaust did they have? What about the huge fan?

In general, they were not set up to really run---they were set up to be dependable long term transportation which they are. It is because of this is why the 305 gets a bad rap. i really think the 305 can be an ok performer.
Reply With Quote Quick reply to this message
  #22 (permalink)  
Old 09-05-2011, 06:22 PM
spinn's Avatar
He got me, like he got you
 

Last journal entry: This makes a huge difference
Last photo:
Join Date: Oct 2004
Location: Midnight
Posts: 2,546
Wiki Edits: 0

Thanks: 14
Thanked 88 Times in 85 Posts
My 85 truck has 305 3.73 gears , performer cam, 906 vortec heads, full headers. Will break 16 flat.
Reply With Quote Quick reply to this message
  #23 (permalink)  
Old 09-06-2011, 05:05 AM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 59
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 597 Times in 546 Posts
Quote:
Originally Posted by against all odds
Here we go again with the 350 vs. 305, 305 is crap thing again
Only because that is the direction you're taking it in. The OP specifically asked: "what 350 should i look for".

And BTW, 1.1 seconds in the quarter mile is a BUNCH!! At least a 30 HP difference. About 160 HP for the 350 and about 130 for the 305 at the rear wheels. Second calculator down, left side, HERE. You can get a better estimation from a calculator that uses weight, speed and ET.
Reply With Quote Quick reply to this message

Recent Hotrodding Basics 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:
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
engine combo help caprice75 Engine 9 02-28-2011 04:39 PM
engine combo mbbigboo Introduce Yourself 2 12-31-2010 12:58 AM
355 engine combo DBourg Engine 1 02-24-2008 05:38 PM
My engine combo 65coupe351w Engine 0 05-08-2007 08:57 PM
Please help, engine combo malibu68 Engine 4 12-02-2004 03:09 PM


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