Like Tree0Likes

old school engine questions

Reply
Old 12-19-2006, 09:04 PM
  #1
Registered
Thread Starter
Trade Score: (3)
 
Join Date: Apr 2006
Location: Toledo Oh
My Boats: 22 Avanti, 25 Nova, 2 turtle doves and a partridge in a pear tree,SBYC
Posts: 8,665
Default old school engine questions

I have an old nova 250 with twin 302 fords, 2 barrel carbs, supposedly 188 hp apiece, boat runs good, comes on a plane pretty quick, and the motors seem to top out around 4300 rpm with my gps saying 46 mph. what Im wondering is how much power wise and speed wise would I gain by throwing some say edelbrock dual planes on them with a couple 4barrels and maybe a cam upgrade? would it start drinking gas??
phragle is offline  
Reply With Quote
Old 12-19-2006, 10:28 PM
  #2
Registered
 
jeff32's Avatar
 
Join Date: Jun 2004
Location: St-Hyacinthe, quebec, canada
My Boats: 2000 triple 500 efi Sonic 45
Posts: 6,245
Default Re: old school engine questions

I'm not an expert, but I don't think it is gona drink more gas... 188 hp each is not much for a boat in this size. I think more powerfull engines will work more freely, or not as hard for a given speed, thus making the boat maybe a little less thursty... just my opinion based on my previous experiences...
jeff32 is offline  
Reply With Quote
Old 12-19-2006, 11:57 PM
  #3
Registered
 
24degrees's Avatar
 
Join Date: Jun 2005
Location: Minneapolis, MN
My Boats: '74 Magnum 27 Sport, '70 Donzi 18 2+3
Posts: 1,370
Default Re: old school engine questions

Sounds like a good idea to me......
24degrees is offline  
Reply With Quote
Old 12-20-2006, 02:29 AM
  #4
Registered
 
johnnywhip's Avatar
 
Join Date: Mar 2006
Location: Tulsa, OK
My Boats: 1979 Cig 20
Posts: 155
Default Re: old school engine questions

Old school caught my eye...my 02...heads won't flow..kinda remind me of the 70's...we spent alot of money and busted alot of knuckles before we started putting in BIG BLOCKS.......boat is perfect now....have FUN!!
johnnywhip is offline  
Reply With Quote
Old 12-20-2006, 06:21 AM
  #5
Platinum Member
Platinum Member
 
Perfectmix's Avatar
 
Join Date: Feb 2003
Location: Traverse City, Mi
Posts: 850
Default Re: old school engine questions

Quote:
Originally Posted by phragle
I have an old nova 250 with twin 302 fords, 2 barrel carbs, supposedly 188 hp apiece, boat runs good, comes on a plane pretty quick, and the motors seem to top out around 4300 rpm with my gps saying 46 mph. what Im wondering is how much power wise and speed wise would I gain by throwing some say edelbrock dual planes on them with a couple 4barrels and maybe a cam upgrade? would it start drinking gas??
I think the fords with the 302 4 barrels were considered 225hp, I know the 305 chevy's were 228hp, If your engines are in good shape It would be a good bang for the buck.
Perfectmix is offline  
Reply With Quote
Old 12-20-2006, 07:07 AM
  #6
Registered
 
Dregsz's Avatar
 
Join Date: Feb 2005
Location: Gig Harbor, WA.
Posts: 510
Default Re: old school engine questions

less the 5 mph
In my opinion
Dregsz is offline  
Reply With Quote
Old 12-20-2006, 10:12 AM
  #7
Registered User
 
Join Date: Oct 2003
Posts: 9,495
Default Re: old school engine questions

No matter what you do up top, you're still dealing with low-perf bottoms. Take care of that and you've got weak drives. Plus, you'll need to re-prop. For what you spend on getting 10 or 15 mph, you could trade up to a bigger, newer, faster boat- especially with the used boat market being what it is right now.
Chris Sunkin is offline  
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Ghostrider
General Q & A
6
09-10-2008 10:26 AM
fastlane40
General Q & A
13
07-15-2008 10:51 PM
Need-the-Speed
General Q & A
11
09-25-2007 02:48 PM
daqcraig
General Q & A
1
03-01-2007 11:06 PM
BAD-HABIT
Formula
9
04-22-2002 05:54 PM



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



All times are GMT -5. The time now is 09:41 AM.


Copyright 2011 OffShoreOnly. All rights reserved.