new member
07-22-2005, 09:03 AM
#1
Registered
Thread Starter
Join Date: Jun 2005
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
new member
I have a 2000 nsx with approx 550 hp, 1.36 gears, and a 24 pitch 4 blade bravo. The boat turns 5500rpm at 76 mph on gps. Does this sound reasonable? It seems like I have the slowest nsx in history. I do have a B&M 250 I'll try to get on this weekend. I've had the boat for a couple years and I'm not sure I could live without it but I need to get serious and start pushing 100. What's it going to take?
07-22-2005, 08:11 PM
#2
Registered
Join Date: Nov 2002
Location: Champaign, IL
Posts: 654
Likes: 0
Received 0 Likes
on
0 Posts
Re: new member
An NXS with a 502/502 runs in the neighborhood of 78mph... what exactly is your engine. what rpm are getting and what is the powerrange of the package. With 550 hp you should be running mid 80's. A 525efi runs 84 or a little better.
Don
Don
07-23-2005, 12:36 AM
#4
Registered
Thread Starter
Join Date: Jun 2005
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
Re: new member
It was a 502 mag EFI. I put on a carb, intake, new hydraulic roller blower cam,roller rockers, ignition, and did the heads(shaved and stock valves). The motor runs great at 32 degrees timing, planes pretty well and runs up to 5500-5600 rpms. Maybe my prop is junk? Its a bravo 24 and you can tell its been worked at some point. I've tried a 27 3 blade mirage and couldn't even get on a plane. I have a hydromotive quad IV 26 but it runs worse. I don't think the boat likes or needs the stern-lifting prop.
07-23-2005, 04:50 PM
#6
Registered
Join Date: Nov 2002
Location: Champaign, IL
Posts: 654
Likes: 0
Received 0 Likes
on
0 Posts
Re: new member
The boats definately like the bravo 4 blade prop... if your prop has been reworked multiple times it could have lost some diameter and have lots of slip.....
Have the motors been dynoed ? where did you get 550 hp ?.... if the cam is for a blower application.. it is possible that you are not making even 450 hp...
Don
Have the motors been dynoed ? where did you get 550 hp ?.... if the cam is for a blower application.. it is possible that you are not making even 450 hp...
Don
07-25-2005, 10:30 PM
#9
Charter/Platinum Member
Charter MemberJoin Date: Oct 2000
Location: Egg Harbor Twp, N.J. USA
Posts: 223
Likes: 0
Received 0 Likes
on
0 Posts
Re: new member
Sounds a little slow. I am still dialing in my new 2600 AO that has a 525EFI, 1:36 gears and 15 1/4 26 Bravo 4 blade. I have seen 82 @4900 this past weekend, still have some more work, but boat should be in mid 80's when done. Ed really builds a great cat. PS it is my third 2600 in nine years...
