Notices

Headers ?

Old 12-03-2006, 08:16 PM
  #1  
Platinum Member
Platinum Member
Thread Starter
 
WAGS382's Avatar
 
Join Date: Oct 2003
Location: Mentor Ohio
Posts: 275
Likes: 0
Received 0 Likes on 0 Posts
Default Headers ?

Has anyone here tried the Hardin Marine typhoon headers?
I am running HP 500's that have been bumped up to 620 HP and was wondering if headers would make a noticable improvement over the Gil exhaust.
Jeff
WAGS382 is offline  
Old 12-03-2006, 08:42 PM
  #2  
Platinum Member
Platinum Member
 
Join Date: Dec 2002
Location: Dallas, TX
Posts: 2,196
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Headers ?

They CMI E-tops should add 15-30 hp. If you are interested, I have two sets with tail pipes. E-mail me if you want to pursue.
BenPerfected is offline  
Old 12-04-2006, 03:41 PM
  #3  
Registered
 
Too Old's Avatar
 
Join Date: Oct 2000
Posts: 2,713
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Headers ?

Originally Posted by WAGS382
Has anyone here tried the Hardin Marine typhoon headers?
I am running HP 500's that have been bumped up to 620 HP and was wondering if headers would make a noticable improvement over the Gil exhaust.
Jeff
I don't know anything about the Hardins.

But you may want to consider Stellings also

Last edited by Too Old; 12-24-2006 at 10:24 AM.
Too Old is offline  
Old 12-04-2006, 03:45 PM
  #4  
Banned
 
Join Date: Feb 2005
Location: Cleveland, Ohio
Posts: 1,460
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Headers ?

I have done extensive dyno testing with our "B" class engines we used to race the CMI E tops are worth every bit of 25-30 HP.
mrhorsepower1 is offline  
Old 12-04-2006, 05:27 PM
  #5  
Registered
 
Ateco's Avatar
 
Join Date: Apr 2006
Location: Ingleside, IL
Posts: 232
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Headers ?

Etops will provide more power and of course that nice bling factor.

Fred is not kidding, there will be a 10% price increase.

Good luck with your project.

Kirk
Ateco Engine and Dyno Shop
Ateco is offline  
Old 12-04-2006, 06:46 PM
  #6  
bob
Charter Member #40
Charter Member
 
Join Date: Oct 2000
Location: Cape Coral, FL
Posts: 1,114
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Headers ?

Anybody ever do any comparisons with the "tube tops"? They look to have runners at least close to 32-34" in length and close to being equal length.
bob is offline  
Old 12-04-2006, 08:27 PM
  #7  
Platinum Member
Platinum Member
Thread Starter
 
WAGS382's Avatar
 
Join Date: Oct 2003
Location: Mentor Ohio
Posts: 275
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Headers ?

mrhorsepower1
Thanks for the response
These are 502's with the AFR 305's heads and a mild cam. All the parts are original HP500 except the heads and valve train and I like the stock look of the gil's.
The boat is a 382 Fastech, it responded well to the extra 100 hp per side with a 8 mph increase, I am not sure what 25-30 more would do.
Has anyone compared the E Tops vs sport tubes?
WAGS382 is offline  
Old 12-04-2006, 08:53 PM
  #8  
Platinum Member
Platinum Member
 
Join Date: Dec 2002
Location: Dallas, TX
Posts: 2,196
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Headers ?

I have done back to back comparisons on the CMI E-tops vs. the Sport Tubes. The Sport Tubes make 15-20 HP more, but only above the 5200-5400 RPM range. There are points from 4000-5000 RPM where the E-tops make more torque than the SP's. The Sport Tubes start to shine from 5300-6800 RPM. On my combination, the 2 1/4" ID Big Tubes added another 20 HP over the SP's but again only at the higher RPM.
The E-Tops are the all around best value...except for the bling!
BenPerfected is offline  
Old 12-04-2006, 10:19 PM
  #9  
Still Chillin
VIP Member
 
axapowell's Avatar
 
Join Date: Nov 2001
Location: Alexandria Bay, NY 1000 Islands
Posts: 2,514
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Headers ?

I had heard that there were ALOT of problems with the "Big Tubes" cracking around the mounting flange on the heads? Worth the extra 10-15 at that RPM?

I also noticed an increase of 30-40 hp from the Gils to the E-tops!

Dave
__________________
Air, Sea, and Land...Exploring the planet in 3-D!
axapowell is offline  
Old 12-06-2006, 02:14 AM
  #10  
Registered
 
Donzi502's Avatar
 
Join Date: Sep 2006
Location: Auckland
Posts: 151
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Headers ?

E Tops rock!
Donzi502 is offline  

Quick Reply: Headers ?


OSO Sponsor
OSO Advertiser
OSO Advertiser

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.

OSO Advertiser