Notices

Imco Thumper power?

Old 03-24-2012, 10:51 AM
  #1  
Registered
Thread Starter
 
Join Date: Sep 2006
Location: Tonawanda NY
Posts: 4,002
Likes: 0
Received 3 Likes on 3 Posts
Default Imco Thumper power?

Imco Thumper power? are they any good Ive never heard of them, what are they worth? I found a set never used new in box, was thinking about them for my 502

thanks
88242LS is offline  
Old 03-24-2012, 05:47 PM
  #2  
Registered
 
masi242's Avatar
 
Join Date: Sep 2002
Location: W.Spfld,Ma
Posts: 2,416
Received 11 Likes on 10 Posts
Default

Couldn`t hurt maybe a little more sound and less money in your pocket
masi242 is offline  
Old 03-25-2012, 10:48 AM
  #3  
Registered
 
Join Date: Oct 2009
Posts: 62
Likes: 0
Received 1 Like on 1 Post
Default

IMCO's "Thumper" series exhaust manifolds are very similar to their upgrade "Power Flows". The "Thumpers" are primarily meant for replacement of stock cast iron manifolds at a more affordable price point. If you're 502 is basically stock, the "Thumper" series would be the way to good and you will see some modest performance/power improvement over stock cast iron manifolds.
twocents is offline  
Old 03-25-2012, 10:54 AM
  #4  
Registered
Thread Starter
 
Join Date: Sep 2006
Location: Tonawanda NY
Posts: 4,002
Likes: 0
Received 3 Likes on 3 Posts
Default

thanks guys, however they only come with standard risers, and on the web site they don't offer a alt, not sure if i can buy a set for the powerflow if they bolt right up, I would think they do. but unsure.
88242LS is offline  
Old 03-25-2012, 12:42 PM
  #5  
Registered
 
Join Date: Jul 2008
Posts: 2,801
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by twocents
IMCO's "Thumper" series exhaust manifolds are very similar to their upgrade "Power Flows". The "Thumpers" are primarily meant for replacement of stock cast iron manifolds at a more affordable price point. If you're 502 is basically stock, the "Thumper" series would be the way to good and you will see some modest performance/power improvement over stock cast iron manifolds.
Correct about them being a replacements piece with a a bit more flow.

IF your old iron manifolds are leaking or bad, youll pick up some ponies and lose some weight bolting these on.

The power flows are a notch up- and have larger inner diameter runners and move more volume, power flows are a great high perf manifold for all but the wildest configurations.


UD

Last edited by Uncle Dave; 03-25-2012 at 01:57 PM. Reason: spelling
Uncle Dave is offline  
Old 03-25-2012, 01:56 PM
  #6  
Registered
 
Expensive Date's Avatar
 
Join Date: May 2006
Location: West Creek NJ
Posts: 4,227
Received 1 Like on 1 Post
Default

I have them, don't expect any more HP but they are lighter and cheaper than cast iron. I really noticed a difference in how my boat comes on plane and rides with less weight on the rear.
Expensive Date is offline  
Old 03-25-2012, 07:09 PM
  #7  
Registered
 
Join Date: Apr 2005
Location: LITCHFIELD,IL.
Posts: 470
Likes: 0
Received 0 Likes on 0 Posts
Default

Can Powerflows be a direct replacement for merc-gils
schnydo is offline  
Old 03-26-2012, 02:49 PM
  #8  
Registered
 
Join Date: Jun 2010
Location: Rochester, NY
Posts: 238
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by 88242LS
Imco Thumper power? are they any good Ive never heard of them, what are they worth? I found a set never used new in box, was thinking about them for my 502

thanks
is your power steering pump up by the valve cover on your motor????

reason i ask is i put Imco power flows on mine last year and the 90 degree hard line that comes out of the back of the pump hit the manifold.... after doing some research i see that they make a bracket to relocate the PS pump and alternator to fix this issue ($150ish)...... would have been nice to know before every thing was installed that this might be needed....

anyway by the time i bought that relocate bracket, and then bought the brackets to mount my thunderbolt module and shift plate assembly on the other side i ended up with about and extra $200 in parts i wasnt expecting.
gsxr1216 is offline  
Old 03-26-2012, 03:39 PM
  #9  
Registered
Thread Starter
 
Join Date: Sep 2006
Location: Tonawanda NY
Posts: 4,002
Likes: 0
Received 3 Likes on 3 Posts
Default

hmm not sure until the boat gets home
88242LS is offline  

Posting Rules
You may not post new threads
You may not 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


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.