Motor height on ZX225 with Phase 3?

[SkeeterJohn]

I was finally out on the water yesterday after a loooooong winter, and was doing some setup on my ZX225 with 250 HPDI Phase III. I only got to run my new motor out once last fall before winter arrived and put an end to my year. First impressions were that it was noticeably faster and more responsive especially the hole shot and mid range!

I know a couple of people on here have played around with a similar setup and reached speeds in the low to mid 80's. Previously on my stock 225 the best i saw was 70.5mph with a 27P-T1 @ 5600 rpm and 25+ w/psi. I know that's lower than some speeds posted too.

More info on current Setup:

- Gas Tanks 2/3 full 38gal with fresh 94 Octane gas. (only other option is 91 here)
- 4 x 31 batteries
- Motor is mounted in 2nd holes from top with a 2.25" split in the 12" slidemaster JP.
- Plugs are clean and BKR7EKU
- Running at 77mph with a 27P-T1 turning 5850 rpms and 25+ w/psi

I know i need to get a much more accurate motor height which i hope to measure tonight but i'm gestimating that i'm at about 2.5 - 2.75 below pad. I tried a 29P-TXP with medium pvs plugs and the holeshot was slower and the rpms much lower at just barely over 5000 which is low.

I'm open to suggestions but i'll post my motor height asap if the rain stops I'm pretty sure i need to come up to the 1.75-2" below pad area judging by other posts i've read.

[SkeeterJohn]

It turns out i'm actually lower than i thought at 3" right now so i'll bump it up and it'll help with the rpms and speed i'm sure... i'm just dragging gear case right now

[engineermike]

I was able to go up to 3/4" below the pad on mine with the stock water inlet. I modified the stocker some and now and even with the pad. My boat has gone faster with every increase in height. I'm assuming you have the factory nose-cone water pickup.

[SkeeterJohn]

Yes that's right. If i want to go much higher 'll most likely have to move my motor as i'm starting to run out of j/p space too. I've moved it up to 2 1/4 and we'll see how it works out next time out.

[SkeeterJohn]

Thanks Mike (21XDC) for the tip on moving the motor up I've got it on the bottom holes now but reset the height to 2" below. We'll see how it runs tomorrow but now i have lots of room to go up and down.

[SkeeterJohn]

A quick update.. it turns out the station i bought my gas from must have had bad gas or something as i was having trouble getting the motor started. Back at home i hooked it up to the computer and sure enough i was dropping cylinders.

I checked the injectors and spark on all 6 and they were firing fine so i drained the gas out of the vst and ran the motor on a 5 gallon tank of fresh gas and it was purring again.

It just shows you that you can't trust a station that gets a lot of traffic. I've drained my main tanks and will fill up elsewhere and try again next time out.

Unreal!