the initial #s are in
03-20-2007, 07:00 PM
#1
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the initial #s are in
Many thanks to Eric Betty and Troy Lannom at EB Marine for all their hard work on my behalf this winter.
Same goes to my good friend RB Hixson who worked with us like it was his own motor.
All along I was hoping to get 90 MPH, and figured anything over that was a bonus. To say the least I am very pleased with 2 quick passes (91 @ 5900 and 93 @ 6000) with my old prop (28" P5-X). I thought it would be good to establish an apples to apples baseline with my best prop. 72os, 1/2 tanks, 1 person.
I think there may 2 or 3 MPH left with some tuning and prop testing.
What a great way to start the season
!
Regards,
Steve
Same goes to my good friend RB Hixson who worked with us like it was his own motor.
All along I was hoping to get 90 MPH, and figured anything over that was a bonus. To say the least I am very pleased with 2 quick passes (91 @ 5900 and 93 @ 6000) with my old prop (28" P5-X). I thought it would be good to establish an apples to apples baseline with my best prop. 72os, 1/2 tanks, 1 person.
I think there may 2 or 3 MPH left with some tuning and prop testing.
What a great way to start the season
!Regards,
Steve
Last edited by Steve Zuckerman; 03-20-2007 at 10:34 PM.
03-20-2007, 08:53 PM
#3
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Gary,
Thanks. Could be a few MPH left. You know, if you haven't been in the saddle for months, 93 seems pretty fast
......so I didn't milk it, and I'm probably under propped. I'll try a 32" Merc lab B1 and and a 30" P5-X soon.
Re the drive (I'm still using a standard length Imco with a 1" spacer), haven't done anything yet, but plan to do some cryo treating of the gears. I think they're in for a hard time this year ..........
Regards,
Steve
Thanks. Could be a few MPH left. You know, if you haven't been in the saddle for months, 93 seems pretty fast
......so I didn't milk it, and I'm probably under propped. I'll try a 32" Merc lab B1 and and a 30" P5-X soon.Re the drive (I'm still using a standard length Imco with a 1" spacer), haven't done anything yet, but plan to do some cryo treating of the gears. I think they're in for a hard time this year
..........Regards,
Steve
Last edited by Steve Zuckerman; 03-21-2007 at 09:14 AM.
03-20-2007, 10:45 PM
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Bob,
Weeeellll, tha's a whole 'nother story as we says down South ..........
I'll show the pull as soon as I get the dyno sheets. They are at Eric's shop. I hope you're sitting down, it made around 650HP @ 6000, and 718 @ 6500. Not our dyno. Not a typo. Bad correction factor? Bad calibration? Bad moon phase?
If I ran 93 with 650HP, I must have the best rigged, lightest Heat in the world (helium in the gas tanks maybe ), which of course I doubt.
Go figure......What do you think it's making
?
Regards,
Steve
Weeeellll, tha's a whole 'nother story as we says down South
..........I'll show the pull as soon as I get the dyno sheets. They are at Eric's shop. I hope you're sitting down, it made around 650HP @ 6000, and 718 @ 6500. Not our dyno. Not a typo. Bad correction factor? Bad calibration? Bad moon phase?
If I ran 93 with 650HP, I must have the best rigged, lightest Heat in the world (helium in the gas tanks maybe
), which of course I doubt.Go figure......What do you think it's making
?Regards,
Steve
Last edited by Steve Zuckerman; 03-20-2007 at 11:20 PM.
03-20-2007, 11:12 PM
#6
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Bob,
I just ran the #s through go fast's boat speed calculator, and it says 816HP, which sounds more realistic to me.......
Regards,
Steve
www.go-fast.com
I just ran the #s through go fast's boat speed calculator, and it says 816HP, which sounds more realistic to me.......
Regards,
Steve
www.go-fast.com
Last edited by Steve Zuckerman; 03-20-2007 at 11:18 PM.
03-21-2007, 08:44 AM
#8
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I'll try to post the pull today. Please feel free (everyone) to analyze them. I am scratching my nuts over the way the boat is running, but I'm sure as hell scratching my head over the dyno #s
.................The weather was pretty good for here this time of year.
We had a cold front blow through, so it was around 50os with low (I think like 35%) humidity.
I asked the guy who owns the machine shop (does great machine work BTW, mostly race cars) what he was using for a correction factor. He says he plugs in temp/barometric pressure/humidity into the computer and the software calculates the correction factor. We did find some more HP while we were there by redegreeing the cam, so it wasn't a totally wasted effort or $.
What's the old saying, "there are lies, damn lies, and statistics"?
Regards,
Steve
Last edited by Steve Zuckerman; 03-22-2007 at 12:41 PM.
03-21-2007, 09:39 AM
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What are the cam and head specs? Interesting that it gained 60+ HP from 6000 to 6500 RPM. It surely is making more power than 650. Get the data posted and let's see what it looks like. What was the boost? It's gotta be over 800 to run that fast. Get the raw dyno numbers from him too.
03-21-2007, 09:55 AM
#10
Steve,
Just a thought and refresh me if I'm wrong but...
The stock 575SCi (~620cshp dyno from Merc) ran pretty consistently 74-77 when you first bought the boat from Toby.
You added the Superchiller kit and bumped the boost up substantially to get it to ~770+cshp and ran ~84 all the time (BTW, same as BobL and his 770 dyno hp)
You then rebuild very nicely and now it dynos at 650-700 and you picked up 7-9 mph...WTF
Your numbers are in line with 850hp. That is in fact what we calculate the Supercooled/ProCharger boat is at when running at 5000 feet elevation (which BTW it runs 93+ with a P5X 30 at 5800 rpm, near 100 at Havasu at just over 1000hp)
I have to believe the error is in the dyno run...
Bottom line is, contrary to the dyno sheet, your making some killer power!
Great job
Just a thought and refresh me if I'm wrong but...
The stock 575SCi (~620cshp dyno from Merc) ran pretty consistently 74-77 when you first bought the boat from Toby.
You added the Superchiller kit and bumped the boost up substantially to get it to ~770+cshp and ran ~84 all the time (BTW, same as BobL and his 770 dyno hp)
You then rebuild very nicely and now it dynos at 650-700 and you picked up 7-9 mph...WTF
Your numbers are in line with 850hp. That is in fact what we calculate the Supercooled/ProCharger boat is at when running at 5000 feet elevation (which BTW it runs 93+ with a P5X 30 at 5800 rpm, near 100 at Havasu at just over 1000hp)
I have to believe the error is in the dyno run...
Bottom line is, contrary to the dyno sheet, your making some killer power!
Great job
