How Fast Is My 26" Sonic Prowler?
 

I have a 2000 Sonic that had the stock zz502 in it with a Lunati cam. We guestimated the orig HP to be about 450-475 and I could get 69mph@4900rpm with a 3blade and 67 with a 4blade at about 5100rpm. Bob Madera hooked me up(I say that loosely since Im already 2x what I budgeted lol) with new Heads Cam Intake etc.... I told him my goal was 600+ hp. If i get my 600+hp what kind of speed do you guys think I can expect with 26p 4 blade prop? If Im not really close to or over 80mph I think Im gonna cry.

Well, it's usually between 18 and 25HP for each 1 MPH depending on the hull. At best, I think you'll see 77(3-blade) and 75(4-blade).

:picard1:

Go to the following Procharger supercharger site. This should give you an idea of what to expect with 600+ HP.

http://www.procharger.com/M_profiles.shtml

I'm planning to go with their supercharger maybe next Summer. My Prowler has the stock 502 with 415 HP. Just adding a Procharger supercharger to a stock 502 should put me in or close to the 80MPH range.

Ed
'99 Sonic Prowler
'96 Scarab 22

I have an 01 26 prowler, 540 ci, 630 hp @5300 RPM and 700 lbs of trouque. I'm running a 26 b1 prop. Best speed I've seen is 71.6. I also run a 25 revolution. Same speeds but get the boat on plane easier.


http://i448.photobucket.com/albums/q...0/DSC04566.jpg

After All I have spent, if I only gain 4mph you all will hear about me in the news!

My 02 26 with a 540 under proped and a few bugs 3 people 100 gals of fuel i saw 76 gps.Same boat with stock 500 efi super charged would hit 80.

:food-smiley-007::hitfan:

You couldnt get 80mph solo with a 1/4 tank of fuel? What hp/torq numbers? What exhaust?

Whats that decal above mean?????

Had my 26 out Saturday with new Livorsi GPS speedo installed. Only the second time out since I got the boat in January. I'm finding out that getting this boat on plane is a hand full compared to my 22 Scarab.

Stock 502 with 22P B1 turning 4800 @ WOT. K-Planes set between 4 & 5 on plane just before it porpoises with the OD trimmed for max RPM and speed. With 100 gal. of gas (600 lbs.), 20 gal of water (160 lbs.) and the squeeze and me (350 lbs. total) , I barely got it to 58. Water was dish pan cam.

When I went out back in March for the first time the water pressure speedo read 66 MPH and that was with no water, 6" to 10" chop and about 40 gal of gas.

8 MPH difference in water pressure and GPS.

ED

'99 Sonic Prowler
'96 Scarab 22

The dyno sheet i just found said 682 hp.Im not sure if that was the best they got out of it or not.I have about 12 dyno sheets but i just moved so im still trying to find stuff.With the right prop it will see 80-82 in the chop.:evilb:

A friend of mine has a 2002 prowler with a 525hp and 26p bravo1. Best speed we have seen so far on gps is 72mph.

Someone is dreaming here. This boat won't hit 80 unless your pushing about 900 hp. :drink: Then you better have a drive that will take the power and weight of a tank. The boat seems to run the best in a two ft chop.

I agree. Prowler is built for comfort and not for speed. But that is the reason I got it. At 63 years young I'm more interested in comfort then speed. I got tired of the Scarab bouncing me around like a cork in foot to 18" chop.

But, I'll still probably get a Procharger supercharger next fall and install over the winter to maybe get 65 to 70 MPH out of it. $5,000 is a lot to pay for an extra 10 to 12 MPH but I have spent $5,000 on worse things.

Ed

I have a imco with its.Anytime you would like to go for a ride let me know.Theres a few very reputable board members here ( morgan sutphen performance) that have helped me build this boat and have been it many of times.So again when ever ready for that ride i would love to take you on the hudson for a day.Thanx pete

I not getting in pissing match. What I do know for a fact is I'm pushing 630 hp with 690 lbs of torque. With a b1 26 I see 5100 rpm and 70 to 71 on gps. So if your picking up 10 mph with 50 more hp, please tell me your secert and what I need to change. I was disappointed when I only saw 70. Are you running a shorty? Wanted to try one, but never did.

With a stock 502 I got 5200 rpms with the 22p and see about 66-67 on the speedo(not GPS). Ive found the boat runs better with about 6"-12" of chop. Ive run the trim all the way to about 8-9 without porpoising(not everytime). From 4-5trim to 8-9 trim can be 5mph or better. I also run with less than a half tank of fuel and no water. Those numbers are with me plus 1 of the homies.

I have a GPS now. I will post my numbers on here when I get it out and the difference between water pressure speedo and GPS. Still waiting on the heads. Should be here next week. Hopefully! Im optimistically aiming for an early to mid June test run.

I cant agree with some of yalls figures on here unless the water pressure speedo on my boat is way high. Ive paced with other boats and gotten figures close to mine if not dead on. I think a lot has to do with the driver and working the trim/outdrive and a set of balls doesnt hurt either. I dont see why I cant get 76-79mph with my setup. I could be wrong.

Being a fellow Sonic owner I feel your pain but it is well known that these are hard boats to make fast. The reason we buy them is they are solid,fun and safe in rough water. Good Luck

[QUOTE=KOMPLEX1;3404431I cant agree with some of yalls figures on here unless the water pressure speedo on my boat is way high. Ive paced with other boats and gotten figures close to mine if not dead on. I think a lot has to do with the driver and working the trim/outdrive and a set of balls doesnt hurt either. I dont see why I cant get 76-79mph with my setup. I could be wrong.[/QUOTE]

What power are you trying to see 76- 79 with? My dream meter is anywhere between 5 - 7 mph difference with GPS depending on the wind, tides, and current. I checked my gps with the gps on my phone. Both the saame.

With about 630hp. Bottom line is as long as I see 10mph more on my water pressure speedo ill consider this a successful build.

I have a bone stock 502 with EMI thunder exhaust and no captains call... Also a Bravo 1 24p, unlabbed prop.

Ive never been over 65 in any condition water and varying amounts of fuel and water.

I also have no added options on the boat. My toilet is a 5 gallon Port-o-pottie. (So no holding tank) No AC, No generator, no fridge or microwave.....

I think 65 is the baseline for a stock motor and stock prowler.

Although Ive heard the weight changes from model year to model year. Mine is a 99...

The heads came in today! Just about the last piece of the puzzle. The short block is finished as well. Will have the motor back next week. Install will probably take 2 weeks then its test time. Ill post some pictures when Im done as well.

I have a stock 502 with captains call, bravo 24p labbed prop. 62 on GPS is best I have ever seen.

The motor is in and running! Sounds like a beast! Crisp throttle response. Im going out Saturday to break in the motor under load and test props. Im going to start with a 4 blade 26p and go up to a 28 or down to a 24 depending on what I get out of the 26. Fingers crossed lookin for 78-80 on mechanical speedo.

Why not use a GPS so you know what you're really going? You can get a Garmin eTrex for less than $100. Good luck with it!

if you have a smart phone just downoad a GPS app

I bet your gonna have to have 700hp to see 80. Im no expert in sonics but im guessing it will be a scary ride at 80. You basically have a 24ft boat..im guessing it will be unstable. Better upgrade to 280have k planes and full hyd steering, xr drive, and a shorty if you want 80. There goes another 12k. Lol

I just hooked up a GPS and downloaded the Speedo app for my droid along with the gasbuddy app for the cheapest gas stations. lol

We will see how fast it goes this weekend. I dont think +10 to12 mph on the mechanical speedo(which was 67w/4blade 69 w/3blade) is unatainable. Ill sink this M'fer before I put another dime into it!

Im anxious for a speed report

me to because i GPSed my 28ss this week and i hit 69mph with Gen 6 502. 600 hp
bored 30
srp forged flat tops
moly rings; merlin heads
teague hyd roller valve train.
cam is 610/ 632 lift 236/ 244 dur @50 112 cl
cloyes adjustable timing gear.merlin air gap intake
holley 800
msd distributor (ready to run) msd coil
ngk plugs -9 series
imco powerflow exhaust w/ extensions, no silent choice
bravo 1 w/ 1.50 gears with a 22b1 4blade at 5200rpms i have a imco 2'' shorty and a 3''up 12''out imco ex/box im going to put on and i hope im around the 80mph range

If you add 10mph with an ext box and shorty ill kiss my own a$$ then go buy the same set up! Lol

Here it is! My mechanical speedo f'n broke which sucks because I really wanted to see a comparison but here is what I was able to do on GPS. I have no previous GPS numbers which sucks as well.

Same 22p 4 blade I buried the tach at 6k and went 64mph with 5 people in the boat yesterday evening. Great air low temps and humidity.

I put a 26p 4 blade on it and ran 67mph at 4950rpms with 2 people and worse air this morning. Higher temps and more humidity.

I then put a 24p 4 blade and ran 70.6 @5400 in the same coniditions.

I could have gotten over 71 if I kept playing with it. Since its all new I didnt want to run it too long at WOT. As the motor breaks in I am hoping for another 200-300 rpms. If I get the additional rpm's this should put me really close to 75mph on gps. If Im estimating properly I want to say that originally the boat ran about 60mph on GPS based on the 65-67 mechanical speedo. All said and done Im looking at about 15mph gain with the upgrades. Im gonna play with timing a little and see what happens. All in all I am so far very satisfied cuz when you crack the throttle from cruising at about 3600 rpms it screams and throws you back in your seat. HUGE DIFFERENCE!

Big shout out due to Bob Madara at Marine Kinetics for putting the kit together for me and putting up with all my calls and emails. He knows his ISH! and Brian Roache at Brian Roache racing engines in Dundalk MD for putting it all together for me. He redid the bottom end and put the top end together for me in less than a week. I couldnt speak higher of these two guys. I got what I wanted so far and Im sure the reliability will be there as well.

what rpm are you suppose to be spinning this motor at for peak hp and torque? thats a great improvement for sure. im guessing you top out around 73gps. reguardless...70 is movin'

Peak HP on the dyno sheet was at 5879 rpm's. 5400 rpm's is 600hp even and 584 ft lbs of torque. I increased fuel octance and timing from the dyno sheet tho. Peak torque is at 4600.
Im gonna keep my fingers crossed for 75.

awesome:coolcowboy:

drive height and balance makes a world of different. dynos are known to be off. some builders set theres up for perfect air and temps and humidity to give you high #s. builders I have used Dean Gellner out of ohio and Jim Reid out of mass. use natural setting during the summer and keep it close to it other times. my motors were dynoed in june or july hot sticky days on my Gellner motor made 1114hp on pump gas. it would of made more on some others:evilb:. your boat like my 28 saber and 24 ol are straight bottom with deep x 14 to 15''= drive height 6 1/2 to7 5/8'' which is DEEP and slow. my 24 with 585hp then 595hp then 637hp would hit 74 to 76 gps. I went to a 2'' shortie imco[mercs is slower] and changed the carb set up got 650hp = 83.2 gps with same prop a 26b1. at 5900 to 6000rpm. was getting 5300 at 76. on the river I got 5800 = 80gps. the saber had a X of 14'' new one is 17 1/2'' with a box and konrad ace drive shooting for a 100. a friends 30foot single sutphen with 900hp to 950 hp was at 90 ,92 x was 17'' with a 1'' shortie he pick up 2 mph. step boats are running 18 plus ''. so SONIC your on your way.

Thanx.It has seen 80 before with a diff set up.Were thinking 81,82 mph.As we all know not all prowlers are the same.

Sonic, I would like to talk to you to pick you brain. If we're rining close to the same power,I'm no where close to your speed. Maybe we can exchange #'s throught email.
[email protected]
Thanks , Mike

So.....how about some numbers! Or did u jump? Lol

These numbers?