33ft Question's about speed and weight
 

First off what does a 1987 33ft weigh? In the ABOS blue book it says 7000lbs. for both the twin 330's and twin 420's, so with two 60gal fuel tanks (right?) full that would make it around 8000lbs, then you figure all the crap in the boat is about 500lbs I'm at 8500lbs

(75gal tanks sounds better than 60gal. So 150gal at 7.5lbs per gal brings it to 1125lbs of fuel!) That makes it 8725lbs!

My boat has 25pitch 3 blade Mirage's and pulls them to about 5100rpm witch is 70mph on the GPS Speedo?

So how do I get to the upper seventy's? I have a set of 23pitch mirage's I plan to try this weekend.

This boat was bought as a repo but I finally found the guy that orginally built it and he said it used to run 78mph with these motor's and props at 5400RPM? He could have been blowing smoke though!?! He also said this was with a full tank of gas and four people in the boat! He said it was on GPS but who knows?

What does everyone else have for power and what kind of speeds are getting?

I have never had my 33 on the scales so i
can't help you on weight. Also my 10 Meter
has two 75 gal. tanks. Twin 1311 HP engines
for power.

Blown 1100, I tried to send you an email the other day, Were you at the Shoot-Out? Maybe I can by you that beer Next year!!

Thanks for the Gas Tank size!

FunHome
Yes I was at the ShootOut but did not get to run. I put in
friday afternoon to check Old Red out and made a good pass.
On the way back to the dock at about 40 mph broke a drive,
naturally that ended my attempt at top V Bottom. Man I
was one dissipointed guy after working 6 weeks to get it
ready. I will take you up on the Beer offer, I thank I drank
more than my share while watching the races.

Who took the Top V this year? How fast did the Muscle Boat run?

Sorry about the Drive? What was it? SS3?

The Muscle ran 105 and a 42 Scarrab ran106
Top V was a $4,200,000 55 ft. Callan with
4500 hp.:mad: They ran112 and i am sure
could have ran alot faster.
Yes the drives are #3's with 1.22 ratio.

I've weighed my '89- 33' with trailer and trailer by it self. The boat comes out to be about 9760#'s with 1/3 tanks and some b.s. in the boat. I tell people my boat weighs 9000#'s. I'll have to look at my literature again but I remember having 85 gal. tanks, maybe my lightning is different. If you want to do high 70's you'll need blowers on those 420's. I originally had 420's, now built 600HP (dynoed) 502's from scratch. I'm still messing with props but I'm at low 70's now on GPS. (at 1200 feet and 100 deg.) Maybe I could get high 70's at the ocean and down hill.

Thanks BROKE, Dam these boat's are heavy!! No wonder reggie has Skater build his race boat's!!

I think my motor's are the orginal block's with some work done to them. right now we are getting 69mpg on GPS with 25 pitch mirages and 67mph with 23p mirages. The 23's seem to have better control and midrange punch.

What prop's are running?

Last weekend I ran 26 Bravo's and I couldn't turn them so they went in to get reworked. After calculating, I think I will need 24-25's. Next weekend I will bring all my prop's for testing. I have reworked 25 bravos, 25 mirage, and some 24's. I'll let you know how it goes. On the old motors (420's) I tryed 24 and 25 Hydro's. Those are crap!, Actually the 25 mirages worked ok. I really don't totally care on top end since all my boating is really at 50 mph. With the 26 Bravo's I get 45@2900 and 52@3350 rpm. :)
From looking at your #'s you could probably massage your 25's. 69mph with a 25 couldn't be 5400?

No your right it's about 5100