Compressor shopping.. - Hot Rod Forum : Hotrodders Bulletin Board -- Hot Rod Forum

Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Body - Exterior
User Name
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 06-10-2003, 10:55 PM
mitmaks's Avatar

Last journal entry: Grille
Last photo:
Join Date: Sep 2002
Location: Washington
Age: 34
Posts: 1,626
Wiki Edits: 0

Thanks: 13
Thanked 10 Times in 10 Posts
Compressor shopping..

guys check out this compressor...
I think it should be enough to paint car...esp having V style which should last me longer. what I dont understand is that CFM should be more at higher pressure right? cause its cubic feet per minite and so as it has more psi, it should have more cfm but it shows at higher PSI it has less cfm? how's so? well anyways let me know what do you think of this ohe guys, I might not keep but just for one paint job and then return it.

Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 06-11-2003, 05:57 AM
302 Z28's Avatar  
Last photo:
Join Date: May 2003
Location: North Texas
Posts: 10,940
Wiki Edits: 0

Thanks: 1
Thanked 119 Times in 100 Posts
I personally do not like direct drive compressors. The specs on that compressor (if believable) are certainly enough to run a spray gun, if you can stand the noise.

Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 06-11-2003, 08:56 AM
TurboS10's Avatar
Registered User
Last wiki edit: Auto Terms and Definitions Used in Modern Engine T... Last photo:
Join Date: Sep 2002
Location: Texas
Age: 39
Posts: 3,463
Wiki Edits: 2

Thanks: 0
Thanked 1 Time in 1 Post
That compressor is too small. It will run constantly and add alot of heat to the air. I would suggest at least a 5HP if yo uare going oiless direct drive. I have a 5HP with 30 gallon tank, and it will barely keep up with a spray gun, and I mean barely.

Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 06-11-2003, 09:38 AM's Avatar Moderator
Last wiki edit: How to rebuild a Rochester Quadrajet 4MV carbureto...
Last journal entry: How to change auto shift timing on 200R4
Last photo:
Join Date: May 2002
Location: Bakersfield
Posts: 8,450
Wiki Edits: 21

Thanks: 6
Thanked 45 Times in 33 Posts
You will be much happier with a 5HP Harbor Freight compressor. They can be had for about $350 on sale. As mentioned above, the direct drive small units are strictly hobby grade. Won't last very long for shop work.

The volume goes down as pressure goes up due to air being a compressible gas. A piston compressing air to 10 psi will move a lot more gas than one compressing it to 100psi. The former uses a lot of the stroke to move the air thru the valves while the latter uses the majority of the stroke to compress the air to pressure then a small part of the stroke to shove it thru the valve.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 06-11-2003, 04:18 PM

Last journal entry: JB's 37 Pickup
Last photo:
Join Date: Oct 2002
Location: Smoky Mountains
Age: 78
Posts: 2,358
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
Mitmaks, the higher the pressure the lower the CFM. This is due to the standard rating of a compressor. In painting, you are interested in a constant volume at a regulated pressure. For air tools, it is the same. So if you demand more volume to paint or operate tools at a set pressure that is above the compressors capability, then the pressure will continue to drop, trying to deliver the set volume. Thus a larger compressor could provide 18 CFM at 175 PSI and 30 CFM at 90 PSI. Now you are talking about two stage compressor and 6+HP motor and near $2000.

Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 06-15-2003, 09:13 PM
Mirror Image's Avatar
Last photo:
Join Date: Jan 2003
Location: Birmingham Alabama
Posts: 146
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I would suggest a 5 horse 60 gallon tank it want have to wark as hard and have less water and 60 gallon tank will give you more air reserve so you can have consistent ail pressure
Reply With Quote Quick reply to this message

Recent Body - Exterior 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

All times are GMT -6. The time now is 04:07 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 1999 - 2012. All Rights Reserved.