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mggdoors 04-10-2017 02:57 PM


Originally Posted by SB (Post 4545171)
5 psi I'd be removing the filter and cutting it open looking for things. Hope not, but ....

If motor is okay, check oil psi with mechanical gauge.

Checked into it today. Turns out my buddy pumped out the oil on the engines at 9 liters. Then put in 9 quarts. So we are at least 2 quarts over on the stock 8 qt mercruiser pans. Quite pissible a windage issue. From the bottom of the dipstick to the full mark is the same dustance past the full mark it is over on both engines

mggdoors 04-10-2017 02:58 PM

15-40 rotella t4. Will be switching to 20-50 vr1 synthetic soon

mggdoors 04-17-2017 07:49 AM

Ran the boat this weekend. Oil pressure is good. We switched from rotella to vr1. The previous issue was overfull by qt and half. Timing was set to 36 total with max rpm at 5200. Blowers are on the way. We tracked down a pair of b and m 250.

SecondWind 04-29-2017 07:19 AM


Originally Posted by mggdoors (Post 4546830)
Ran the boat this weekend. Oil pressure is good. We switched from rotella to vr1. The previous issue was overfull by qt and half. Timing was set to 36 total with max rpm at 5200. Blowers are on the way. We tracked down a pair of b and m 250.

Curious to see new performance specs with the huffers on board. Your dominator should be a rocket this year when you get it dialed in. Perfect amount of power for that hull IMHO. I've always been a huge fan of the way that boat looks on the water.

mggdoors 04-29-2017 12:07 PM


Originally Posted by SecondWind (Post 4550360)
Curious to see new performance specs with the huffers on board. Your dominator should be a rocket this year when you get it dialed in. Perfect amount of power for that hull IMHO. I've always been a huge fan of the way that boat looks on the water.

I will keep you updated. Currently doung the glass work now. Had to shorten scoops and reshape.

MILD THUNDER 04-29-2017 12:45 PM

I'd find it pretty damn coincidental, that BOTH engine builds, can only turn the same props to exactly 5100rpm wot.

We have a 9.6:1 vortec headed combo, and 230/236 cam, and a 8.3:1 EQ headed headed combo, with a 236/244 cam. Over a full point less static, different cams, different intakes, completely different heads, and they both make the EXACT same power at 5000/5100? 20-25hp is usually 100RPM in a boat.


I have seen aftermarket rev limiters, come in WAAAAY early and start killing power.

MGDOORS, how do the new engines feel? Do they feel stronger than the old ones say from 50mph to 70mph? What do you have for flame arrestors and hatch ventilation? What exhaust is on them?

MILD THUNDER 04-29-2017 12:52 PM

Those 32's would crack 80mph with HP500's all day. I find it hard to believe, that even with 8.3:1 (hp500 was what, 8.75:1), better cylinder heads (both around 320cc), slightly bigger cam, 80cfm smaller carbs, both single plane intakes, would knock 8-10 plus mph off the boat. What altitude are you running at?

mggdoors 04-29-2017 01:35 PM


Originally Posted by MILD THUNDER (Post 4550409)
Those 32's would crack 80mph with HP500's all day. I find it hard to believe, that even with 8.3:1 (hp500 was what, 8.75:1), better cylinder heads (both around 320cc), slightly bigger cam, 80cfm smaller carbs, both single plane intakes, would knock 8-10 plus mph off the boat. What altitude are you running at?

Altitude 3000. It runs stronger on top. Much stronger. Before after 4500 it would kinda take its time. Now gets there in a hurry. From what i understand my drives being 6 3/4 in the hole are hurting me. I have been running 26 bravo. They give bow steer bad unless trimmed pretty good runs flat but with rough ride. Never blowout ever. I have a set of labbed 27 mirage plus that dont take off worth a **** and blow out in rough. They were solid 6 miles an hour faster, boat felt light, rode smooth as silk in 3-4' whitecaps in havasu. Also they got to the top end Much Much faster. Like lightning. Im working with cutting edge now on some labbed 4 blade 30s that we are adding cup to the tip to air it out a bit. My buddy even said it looks like we have too much boat in the water.

mggdoors 04-29-2017 01:36 PM

Gil dry exhaust. Std hatch ventilation two on top two on sides one in rear. Was running kn 14x5. With blowers we are going to 3x12 bourbon

mggdoors 04-29-2017 01:40 PM

What kind of rpm gain can i expect from 5-6 boost on the blowers with same props


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