increasing horsepower? - Pontiac GTO Forum
User Tag List

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 30 (permalink) Old 03-25-2013, 10:37 AM Thread Starter
 
Join Date: Feb 2013
Location: Bellevue, Ne
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
increasing horsepower?

So I'm wanting to increase the horsepower on my '73 GTO but not sure how. Gimmie suggestions guys.
airdale171 is offline  
Sponsored Links
Advertisement
 
post #2 of 30 (permalink) Old 03-25-2013, 12:58 PM
 
SANDU002's Avatar
 
Join Date: Oct 2004
Location: BROOKEVILLE, MD
Posts: 1,116
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Headers and cam


67 Post Coupe,
69 RA III Judge
06 BOM, M6, 18's
SANDU002 is offline  
post #3 of 30 (permalink) Old 03-25-2013, 01:17 PM
Former Super Moderator
 
Rukee's Avatar
 
Join Date: Feb 2007
Location: South Central Wisconsin
Posts: 9,919
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
You're only limited by your wallet!!
Rukee is offline  
 
post #4 of 30 (permalink) Old 03-25-2013, 02:36 PM
Super Moderator
 
BearGFR's Avatar
 
Join Date: Aug 2008
Location: Springtown, TX
Posts: 5,731
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 122 Post(s)
Garage
Need several pieces of information, like:

* What are you running now? (Engine, heads, cam, carb/intake, exhaust - also transmission, rear axle, power brakes? a/c?)

* How much of an increase are you looking for?

* How does the car get used? (street, highway, race, show, mixture)

* Is it "original" now and how important is it to you to maintain that?

* (Last but not least) Ball park budget?

To give you a "general" answer, an engine is basically just an air pump. Getting more power out involves making it pump more air. There are many different approaches as to how. Give it bigger lungs (more displacement - bore and stroke), make it breathe "more quickly" (cam to make it efficient at higher rpm, [but at the expense of lower rpm efficiency]), make it breathe more efficiently (better heads, better exhaust, better carb/intake), "force feed" air to it (supercharger, turbocharger), or a combination of two or more approaches. That all have their advantages, disadvantages, costs, impact on reliability/drivability, etc.


Bear

BearGFR
Springtown, TEXAS

Last edited by BearGFR; 03-25-2013 at 02:54 PM.
BearGFR is offline  
post #5 of 30 (permalink) Old 03-25-2013, 02:43 PM
 
67GTOCoupe's Avatar
 
Join Date: Mar 2013
Location: Norwalk CT
Posts: 70
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If you are a little more specific as to how much money you want to invest and how deep you want to go into modifying I'm sure a bunch of people here could make some good suggestions.
As a basic rule of thumb with any car the first thing to always go after is give the engine the ability to take in more outside cooler air and the ability to expell the exhaust in the shortest and least restrictive manor.
An engine is nothing but a big air pump. The more air you can get in at the coolest tempature possible will allow you to add more fuel. Then you need to get ride of what you have taken in as quick as possible.
This is a very over simplified point of view but is the basic principal.
I always preach never just improve and engines ability to take in more air and fuel unless you are going to improve its ability to expell that now used air if you want the best results for your efforts.
67GTOCoupe is offline  
post #6 of 30 (permalink) Old 03-25-2013, 04:47 PM Thread Starter
 
Join Date: Feb 2013
Location: Bellevue, Ne
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Ok wow um here goes so my car has the stock 442, V-8 in it but it has a MSD Ignition blaster, edelbrock valve covers and air filter with the quad jet carb right now. everything else is stock on this car, I know it will be expensive but i'm not trying to do it all at once. I was researching and the engine it currently has only puts out like 230 HP i believe and I want uproots of 400 if possible without changing the engine all together. I am really looking at putting a blower on it right now. it is not for the track this will be a hot rod that can also double as a everyday driver, I'm just looking for idea's. I won't lie I'm not good with car's but I'm going to do what I have to make this one where I want it "I learn best that way". So bare with me if I say something stupid that's my bad lol.
airdale171 is offline  
post #7 of 30 (permalink) Old 03-25-2013, 04:49 PM
Former Super Moderator
 
Rukee's Avatar
 
Join Date: Feb 2007
Location: South Central Wisconsin
Posts: 9,919
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
442? What car do you have?
Rukee is offline  
post #8 of 30 (permalink) Old 03-25-2013, 05:15 PM Thread Starter
 
Join Date: Feb 2013
Location: Bellevue, Ne
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
73 GTO it's got the V8 but its a 400 4 carb 2 exhaust isnt that the 442?
airdale171 is offline  
post #9 of 30 (permalink) Old 03-25-2013, 05:42 PM
Former Moderator
 
ALKYGTO's Avatar
 
Join Date: Mar 2010
Location: Wentzville, Mo.
Posts: 2,893
Mentioned: 0 Post(s)
Tagged: 1 Thread(s)
Quoted: 15 Post(s)
Garage
Whoa there dude....sorry but you sound like a total muscle car noob. No offense but you need to do a little research and I would start at the basics or you could ruin your car and bank account. First and foremost, 442 is an Oldsmobile model, you have (I presume) a Pontiac GTO which shares the same chassis with the Olds but little else.

Not being sure of the condition of your car and it's drivetrain if I were in your shoes I would start by just giving your car a good tune and an engine health assessment starting with a compression test. Are you sure your car has the original engine?

As others have said, you should have clear goals, plans, and a budget. An engine build from scratch can cost anywhere from $4K to 10K without a blower.

If you really plan on supercharging a Pontiac I would plan on spending 15K or more. Superchargers put extreme stress on an engine and drivetrain and everything must be fortified accordingly. Transmission and rear axle must also be built to withstand the stress and you'll need a dedicated fuel system, ignition system etc.

Honestly a Pontiac can be built to make 400 HP and 500 tq and that is enough HP for most and will yield neck snapping performance. Many members on here have done it and all of us are willing to share experience and knowledge.
ALKYGTO is offline  
post #10 of 30 (permalink) Old 03-25-2013, 06:28 PM Thread Starter
 
Join Date: Feb 2013
Location: Bellevue, Ne
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
A few post's up you will see that I already said I don't know a lot about car's I'm a motorcycle guy. Anyways yes its the original engine this I know for a fact it runs strong seeing how I drove it from LA to San Diego I know that the 442 is in the old's but what is mine then it's a 400 4 barrel 2 exhaust........ain't that a 442? It has all the original paper work and i'm the 3 owner it's just sat along time. I know it's going to be pricey and again this is why I said I'm not looking to do it all at once but I wanna make it a sick ass car. I know what my goal's are lol I just started this thread because I would like to know what can be done to enhance HP lol I am adding header's here in a little while and im going to change the pipes that's on it now I was also thinking of adding a power chip. I'm going to see if I can add a photo on here though my mobile device then ya'll can just see the engine lol
airdale171 is offline  
Sponsored Links
Advertisement
 
Reply

  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, Lemans & GTO General Discussion

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Pontiac GTO Forum forums, you must first register.
Please enter your desired user 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:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Determining tire size when increasing wheel dia 67 LeMans 4dr Cpe 1964-1974 Tempest, Lemans & GTO Wheels & Tires 1 06-14-2012 06:12 PM
Increasing the size of the pic in my sig........ ALKYGTO Gtoforum.com Site Help 8 12-30-2011 08:23 AM
Question about how to get better horsepower? Lukeduk1980 1964-1974 Tempest, Lemans & GTO General Discussion 10 12-17-2009 09:44 PM
horsepower guesses? Dannyz 1964-1974 Tempest, Lemans & GTO General Discussion 3 06-15-2009 04:41 PM
Horsepower? 06BLUEGTO 2004-2006 GTO General Discussion 10 04-06-2007 11:02 AM

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

 
For the best viewing experience please update your browser to Google Chrome