horsepower calculation - 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 03-02-2002, 09:34 AM
Member
 
Join Date: Mar 2002
Location: little rock,ark.
Posts: 123
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Talking horsepower calculation

350 chevy .40 over 10.25 dome pistons edelbrock performer rpm manifold 750 holley 76 cc chambers 2.02/1.60 valves ported headers.can someone give desktop dyno figure?sorry forgot cam. .480/.498 228/236.also roller rockers,someone know aballpark figure from past experience? thanks!

[ March 02, 2002: Message edited by: jimm ]

[ March 02, 2002: Message edited by: jimm ]

[ March 02, 2002: Message edited by: jimm ]

[ March 02, 2002: Message edited by: jimm ]

[ March 04, 2002: Message edited by: jimm ]

[ March 06, 2002: Message edited by: jimm ]</p>

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 03-03-2002, 12:22 PM
lakeroadster's Avatar
Hot Rods are Built, not Bought
 

Last journal entry: Lakeroadster's '31 Model A Tudor
Last photo:
Join Date: Dec 2001
Location: High Plains - Rocky Mountains
Age: 53
Posts: 620
Wiki Edits: 0

Thanks: 24
Thanked 80 Times in 72 Posts
Post

Go to 4lo.com, they have a calculator called "poor mans dyno". It uses 1/4 mile et, or 1/4 mile speed and the weight of your car to guesstimate HP.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 03-03-2002, 12:49 PM
Member
 
Join Date: Mar 2002
Location: little rock,ark.
Posts: 123
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

thanks lakeroadster! havent run 1/4.[dirt drags machine]anyone find the time to run the numbers? "preciate it"
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 03-04-2002, 06:57 PM
RHamm1320's Avatar
Member
 
Last wiki edit: Computer dyno simulation and engine building softw... Last photo:
Join Date: Nov 2001
Location: St Louis, MO
Posts: 91
Wiki Edits: 3

Thanks: 0
Thanked 0 Times in 0 Posts
Post

Attached is the link to the dyno run screen. Looks like 429 ft-lb and 366 hp. The cam is limiting the upper rpm potential but sure gives good torque.

Note: The screen takes a bit to show up in the browser

Dyno Screen Print Link

Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 03-05-2002, 04:47 PM
Member
 
Join Date: Mar 2002
Location: little rock,ark.
Posts: 123
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Talking

gracias rhamm1320! did i mention that roller rockers are 1.6? does this change upper h.p.?you guys are great !thanks again,jimm.

[ March 05, 2002: Message edited by: jimm ]</p>
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 03-13-2002, 06:23 PM
Member
 
Join Date: Mar 2002
Location: little rock,ark.
Posts: 123
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

what? if any,change does using 1.6 ratio v.s. 1.5 ratio rockers make?and where?low,high?thanks jimm
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 03-20-2002, 04:16 PM
RHamm1320's Avatar
Member
 
Last wiki edit: Computer dyno simulation and engine building softw... Last photo:
Join Date: Nov 2001
Location: St Louis, MO
Posts: 91
Wiki Edits: 3

Thanks: 0
Thanked 0 Times in 0 Posts
Post

Thanks for being patient, I finally got to run the engine. This time (including 1.6 rockers) I got 454 ft-lb and 378 hp. Also, there are a few assumptions I made (I assume this was a hydraulic cam, I used a 155cc Intake port and 76cc chambers with a 12.5cc dome piston). If you have any more detailed information let me know and I can run it again.

Thanks,

Ron
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



All times are GMT -6. The time now is 03:15 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.