468 bbc hp and tq?? - 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
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 11-09-2006, 08:36 AM
Registered User
Join Date: Nov 2006
Location: FAIRMONT, WV
Posts: 14
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
468 bbc hp and tq??

I am building a 468 bbc with the following specs and would like an estimate on the hp and tq:

468 ci
compression 10/1
merlin heads, oval port, 2.19"intake, 1.88" exhaust, 119 cc
stroke 4"
rod length 6.135"
Isky 280 megahydraulic cam, lift .565"
edelbrock airgap intake
holley 750 cfm carb, manuel secondaries
2 1/2" Patriot headers into 3" exhaust with Flowmaster 50's
hei ignition w curve kit

thanks a bunch for your replies.
jeff taylor

Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 11-09-2006, 09:46 AM
firestone's Avatar
Last photo:
Join Date: Nov 2003
Location: Fenton MI
Age: 35
Posts: 1,743
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
I would estimate around 500 hp and 500 ft lbs. Below are a couple of motors to compare to. I think yours will be somewhere in between.

~8:1 compression
220 @.050 .500 lift hyd flat tappet cam
weiand stealth intake
"049" heads with 2.19 1.88 valves

made 419 hp @5100 RPM 473 ft lbs @ 4100 RPM

Although your heads will flow better, I think a set of 049's with the 2.19 valves would be close enough to make a comparason.

This next motor is one that a friend of mine had built

242 248 @.050 ~.600 lift hyd roller cam
cleaned up 049 heads with larger valves
victor jr intake port matched to heads

made 560 hp @6100 RPM 560 ft lbs with 20w50 oil

I think these heads would flow a little better than yours, and he has a larger hyd roller cam. Also, I dont know if you have already gotten the headers or not, but you may be able to get away with a little smaller primarys.


Last edited by firestone; 11-09-2006 at 10:03 AM.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 11-09-2006, 01:04 PM
Guy Hiltz's Avatar
Last photo:
Join Date: Sep 2005
Location: Nova Scotia Canada
Posts: 1,002
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
468 bbc hp and tq??

I think that Firestone is giving you some good advice there,a 2 1/2 header is way too big.My bbc only has 1 7/8 inch tubes and it works pretty darned good,and it is a bit more on the radical side than yours,the big tubes could hurt your low end streetability and all round torque.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 11-09-2006, 02:00 PM
Registered User
Join Date: Nov 2006
Location: FAIRMONT, WV
Posts: 14
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
thanks for the quick response guys. After seeing firestone's comment, I went back and checked the size of the header primary tubes and found that they were only 1 7/8 inches.

keep the replies coming.
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
how to get max hp and tq out of 350 sbc dustinweaver Introduce Yourself 2 01-28-2006 08:43 PM
Would you rather low end TQ or HP ChevyThunder Hotrodders' Lounge 23 12-26-2005 10:29 AM
TH-350 max HP and TQ? Pepsimayn Transmission - Rearend 5 09-16-2004 04:21 PM
didn't know where to ask this but HP and TQ relationship? stonedchihuahua Hotrodders' Lounge 11 12-14-2002 03:02 PM
How much HP and TQ can I expect from this: stfinney Engine 8 11-13-2002 08:50 AM

All times are GMT -6. The time now is 08:19 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 Hotrodders.com 1999 - 2012. All Rights Reserved.