7.4 mpi SMALL HP INCREASE?
7.4 mpi SMALL HP INCREASE?
05-04-2005, 11:16 AM
#2
VIP Member
VIP Member
Re: 7.4 mpi SMALL HP INCREASE?
Better Exhaust.
I changed out the cast iron stuff with Stainless Marine and gained 150-200rpm on top...
I changed out the cast iron stuff with Stainless Marine and gained 150-200rpm on top...
__________________
Patrick
Patrick
05-04-2005, 01:12 PM
#3
Registered
Re: 7.4 mpi SMALL HP INCREASE?
are a typical set of aftermarket headers running in the two thousand dollar department. That's what i have seen for the 7.4L so far
05-04-2005, 04:09 PM
#4
Registered
Join Date: Jun 2001
Location: Lehigh Valley, Pennsylvania
Posts: 1,567
Likes: 0
Received 0 Likes
on
0 Posts
Re: 7.4 mpi SMALL HP INCREASE?
Without getting into the internals, not a lot you can do with that motor. It's unfortunate. I agree with the exhaust being a minor change, better flow and much less weight! Lab the prop.....
05-04-2005, 09:53 PM
#5
Registered
Thread Starter
Join Date: Apr 2004
Posts: 123
Likes: 0
Received 0 Likes
on
0 Posts
Re: 7.4 mpi SMALL HP INCREASE?
Kind of what I figured. Im collecting data from prop testing and plan to work with bblades and see what he can do. I knew the engine wasnt modifiable but I got a good deal on it and its in very clean condition,but once you push the throttles its hard to stop! is the exhaust for a 7.4mpi interchangable with other big blocks so when i do upgrade engines I can swap it? I have Custom Marine literally in my town Menasha,wi and have talked with the owner while boating. so I will look into Exhaust,and a lab prop Thanks!
05-05-2005, 06:05 AM
#6
Registered
Join Date: Jun 2001
Location: Lehigh Valley, Pennsylvania
Posts: 1,567
Likes: 0
Received 0 Likes
on
0 Posts
Re: 7.4 mpi SMALL HP INCREASE?
Check these out.. http://cgi.ebay.com/ebaymotors/ws/eB...RK%3AMEWA%3AIT
