HELP!! Sunsation Dominator 32 Twin 502EFI
 

I have a 2002 Dominator with 2 502 efi
no matter what i try the boat hits a wall at 81 mph
bravo 1 drives with 30 p props
as soon as i try to trim the boat to go faster the front starts bouncing and when i trim down its like hitting the brakes
anyone knows what i can do to get the boat to go at least 87 mph
i tried 32 p props and was doing the same 81 mph but just lower rpm

any advice or someone that as the same boat can help me out would be great
thanks

put 1400 hp in it.....:D........whats so wrong with 81 just a tic over 800 hp, Id say thats pretty good

That style vented hull with (assuming) 502 mags @ 415hp each will never run 87, that boat with 496 HO's runs upper 70's with bravo 28's, so I'm thinking your not really running the 81 you think you are, unless those 502's are blue motors

hummm yes they are 502 efi like the post says
blue motor and it does 82 mph to be exact all day everyday on gps

Yeah you're doing damn well for the 502s if you are running that quick.

how is that good i kno 2 other sunsation with 496 ho s and they are doing 78 to 80 mph
i would think the 502 s would be at least 85 mph

500EFI’s ? 525EFI’s ?

500 efi s

That info should help as Most people above thought you had 415hp 502MPI’s.

What rpm are you seeing. If your efficiently spinning those 30's with the 500efi's you should be mid 80's for sure

5100 rpm and if i try to trim it a bit more front starts bouncing

Where do you run the boat? Low 80’s is about right for an everyday speed for that boat. Mid-80’s would be a perfect weather, light load, perfect water conditions speed assuming motors are still strong.

on a rivers in canada , i just figured eith 2x 496 ho guys are runing 84 mph and with 2x 502 blue barely over 80

you start a post saying you have 502 efi's now there 502 blue motors, no such thing as a 502 blue engine, 500 hp, 500 EFI and 525 triple nickle. but there all 502 cu inch

Are the 496 guys the stepped hulls? I've been on a 496 HO stepped hull 2006 and yeah mid-80s are possible under very right conditions.

I was thinking the same thing. I don't think 496HOs on the older dominator hulls (which were my favorites) would do mid 80s with normal loads and normal conditions. My 2000 dominator with 454 mags, 385hp ran 75-76 at LOTO all day long. I ran labbed 28s on it. It never liked the last few ticks of trim. It would always bounce the nose, start to chine walk and slow the boat down 1-2mph.

yes they are 2008 so maybe the new hulls like you are saying are way better

500 then it is blue motor s mercury

The newer hulls are stepped hulls. Your 2002 is a straight hull with a pad.

okay cool so the hook i see toward the back of the hull is not a step ??

No. I think they call it something like laminar flow interupter. It's only for turning. If you look at the hull it is not a full step across the entire bottom. I believe the newer hulls have that plus 2 full steps aft the flow interupter.

okay cool , so what s next for me to go faster , superchargers or put some -2 drives ?

Sell it and buy something faster. You will be money ahead

Really ? These boats have an issue at higher speeds ? Could swear a few out there well into 90's with moderate power. No ?

Your ‘02 has a ventilated chine. That is what you are seeing. It is not a step. The flow interrupters Mental mentions are on the newer twin steps and they are located up towards the bow.

okay thanks for the info

The 2008 and newer 32's with the full step (New hull design) run 82 - 84 if I recall correctly with 496 Mag HO's and 32 Pitch Bravo's. My 2003 32' with HP500's ran 90 MPH on GPS with labbed 30's. They had different intakes etc. but were very close to stock, I had a completely different setup than you though, I had ITS boxes with -2 shorties. I don't know if you will find concrete info. showing whether anyone with your setup trying shorties and having success. Some have tried just not sure if you will find any info. on it, I do know that Wayne had the X Dimension dialed in on them from the factory.

The older 32's do have the Vortex setup midway down the hull but has others have said it is not a step. There is hook built into the bottom of the boat 6" or so from the transom if I recall correctly.

do you kno what is the difference between your 2003 and my 2002 for the hull ?

and what exact drive did you have on ?

Hulls would be identical, difference is the Mercury Racing ITS boxes which I believe are a straight setback box. The uppers were standard Bravo XR with IMCO -2 shorties w/XR gears.

okay thanks for the info and you are able to hit 90 mph on gps ?

Yes, the boat had a Livorsi GPS in it.

Pump up those 500s w/ a HP rebuild. Cam, better heads and tune will get you to 90mph. The 32 Dominator is a great boat!!!

Does anyone else feel his slip #'s are alittle on the high side at 16%? I spin stock 30's 5000-5100 and run a consistent 83-84, with a best of 85.4 in the st. Lawrence river during a poker run, I do have a 2011 with HO's but I'm wondering if the props may be out of whack some, especially if he runs the same speed with 32's with less rpm

I’ve got 2001 with Twin-Hp500 carbs. Best I’ve seen gps with fresh labbed 32 is 83.7 so far fully loaded. Just put them on. With stock 30s 81-82 was top with a real light load. Really considering some shorties. I thought the same thing with the blue motors I would be higher top speed.