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Search: Posts Made By: hpmaniac
Showing results 1 to 25 of 163
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Forum: General Boating Discussion
07-15-2025, 07:36 PM
Replies: 17
Views: 1,974
Posted By hpmaniac

Honestly I was so panicked to get it fixed pics...

Honestly I was so panicked to get it fixed pics were last thing on my mind. The broken fitting is 200ft below water lol. It was 95 degrees and I actually got heat stroke fixing the thing. Yesterday...
Forum: General Boating Discussion
07-15-2025, 10:51 AM
Replies: 17
Views: 1,974
Posted By hpmaniac

The hand pump saved the day, some fuel line and...

The hand pump saved the day, some fuel line and hose clamps are also a good thing to throw in the spare parts bag.
Forum: General Boating Discussion
07-15-2025, 09:38 AM
Replies: 17
Views: 1,974
Posted By hpmaniac

I have 2 brushless bilge fans that move a ton of...

I have 2 brushless bilge fans that move a ton of air.
maybe that was just enough to help keep fumes down. Solid tight electrical connections and good plug wires.
Makes you realize how important...
Forum: General Boating Discussion
07-14-2025, 04:35 PM
Replies: 17
Views: 1,974
Posted By hpmaniac

hey man, good prop. Feels like it has less lift...

hey man, good prop. Feels like it has less lift than my other bravo prop and the velocity likes that. I noticed the barrel is shorter on it. Boat will do 90 with that prop you sold me.
Forum: General Boating Discussion
07-14-2025, 04:33 PM
Replies: 17
Views: 1,974
Posted By hpmaniac

That's the strange part, this boat and drive...

That's the strange part, this boat and drive engine combo is VERY smooth. At any speed I feel zero vibration.
Forum: General Boating Discussion
07-14-2025, 12:40 PM
Replies: 17
Views: 1,974
Posted By hpmaniac

It is the factory murcury mechanical lift pump on...

It is the factory murcury mechanical lift pump on a sci 575. I ran a An fitting from fuel pump up to the factory fuel head. The factory line was very restrictive. It was just a short 12 inch hose...
Forum: General Boating Discussion
07-14-2025, 11:48 AM
Replies: 17
Views: 1,974
Posted By hpmaniac

Close call yesterday!!

We were out in the Velocity cruising about 75 and she started to lay down, quick glance at the gauges and everything looked fine. Looked again and saw fuel pressure dropping.
Slowed down and could...
Forum: General Q & A
07-09-2025, 05:24 PM
Replies: 65
Views: 39,962
Posted By hpmaniac

Cool thread, i have been 94-96 mph in my 280...

Cool thread, i have been 94-96 mph in my 280 velocity on a 65 degree day, 10 inches of chop in salt water at sea level. 1/2 tank and me. she was dancing around on the pad with trim tabs up all the...
Forum: General Q & A
07-07-2025, 01:23 PM
Replies: 7
Views: 1,027
Posted By hpmaniac

So back out on boat with timing fixed, picked up...

So back out on boat with timing fixed, picked up a solid 3.5 mph. Same prop, 15 degree warmer air temp. I'd say honest 60hp gain. Went from running average of 92 93 to 96 97. Zero knock on the...
Forum: General Q & A
07-07-2025, 01:17 PM
Replies: 7
Views: 1,027
Posted By hpmaniac

11.2 comp 565, merlin block. Zero deck, afr 315,...

11.2 comp 565, merlin block. Zero deck, afr 315, ported by Chris straub. Dart oval port intake ported to the rec heads. 1150 dominator. Mike Jones solid roller, 740 731, 258 265@50 114 lobe. Engine...
Forum: General Boating Discussion
07-07-2025, 12:49 PM
Replies: 13
Views: 6,794
Posted By hpmaniac

one needed repaired, someone before me installed...

one needed repaired, someone before me installed a wideband bung in header and it was ugly
Forum: General Q & A
07-06-2025, 03:42 PM
Replies: 7
Views: 1,027
Posted By hpmaniac

my na 565 i built went from 860hp with 30 degree...

my na 565 i built went from 860hp with 30 degree to 915 at 7100 with 37 degrees .
Forum: General Q & A
07-03-2025, 01:09 PM
Replies: 7
Views: 1,027
Posted By hpmaniac

Found some free hp on my blown big block!

Sci 575 in a velocity 280, boat runs hard, engine runs great. Low 90's with full tank and 2 people. I recently got a scan tool so I could watch live data and do tuning. Noticed at wot scanner was...
Forum: General Boating Discussion
07-03-2025, 09:31 AM
Replies: 13
Views: 6,794
Posted By hpmaniac

Same service for me, all I wanted was response on...

Same service for me, all I wanted was response on my question. How long to pressure test my e top headers. 7 calls and 8 emails finally got a response. 12 weeks turn around!! So I just bought a...
Forum: Drives and Lower Units
06-30-2025, 09:34 AM
Replies: 21
Views: 1,981
Posted By hpmaniac

Off topic, does the big weldon marine pump need...

Off topic, does the big weldon marine pump need to have a return line into tank or can it just be installed with a regulator and no return line?
Forum: Drives and Lower Units
06-29-2025, 03:57 PM
Replies: 21
Views: 1,981
Posted By hpmaniac

Running right at 5500 at 90, 11% slip.

Running right at 5500 at 90, 11% slip.
Forum: Drives and Lower Units
06-29-2025, 03:53 PM
Replies: 21
Views: 1,981
Posted By hpmaniac

Wow what a difference adding the second ram for...

Wow what a difference adding the second ram for steering. 90 mph rock solid, almost zero chine with tabs up.
Forum: Drives and Lower Units
06-29-2025, 02:15 PM
Replies: 21
Views: 1,981
Posted By hpmaniac

The roller cam i had built for my 575 should peak...

The roller cam i had built for my 575 should peak at 5600 and carry to 6200, 241- 248 at 50, 650 660 lift on a 114 lobe. Pulling engine soon. Doing afr 315 full cnc, good exhaust valves, cut to...
Forum: Drives and Lower Units
06-29-2025, 10:10 AM
Replies: 21
Views: 1,981
Posted By hpmaniac

So from what I see here the xr upper will fail...

So from what I see here the xr upper will fail before the xr lower? So get the upper first, i just can't spend 25k on a complete drive right now lol, between my prop and whipple intercooler on the...
Forum: Drives and Lower Units
06-29-2025, 09:13 AM
Replies: 21
Views: 1,981
Posted By hpmaniac

I have about 70k into the boat including what I...

I have about 70k into the boat including what I pd. Considering a new 290 is 335k i think I'm keeping her
Forum: Drives and Lower Units
06-29-2025, 09:11 AM
Replies: 21
Views: 1,981
Posted By hpmaniac

Not sure on platform, I've never seen a 280 with...

Not sure on platform, I've never seen a 280 with one like it. I remember some 260 boats had them. The boat only has 344 hrs, 112 on the 575. Such a sweetheart. ...
Forum: Drives and Lower Units
06-28-2025, 11:27 PM
Replies: 21
Views: 1,981
Posted By hpmaniac

https://cimg1.ibsrv.net/gimg/www.offshoreonly.com-...

https://cimg1.ibsrv.net/gimg/www.offshoreonly.com-vbulletin/2000x901/20250628_203910_22bfd3a9d2147ecd0964e7a9c2081e0f539be866.jpg...
Forum: Drives and Lower Units
06-28-2025, 02:25 PM
Replies: 21
Views: 1,981
Posted By hpmaniac

Wow massive difference, any recommendations on a...

Wow massive difference, any recommendations on a good place to purchase the upper? Teague??
Forum: Drives and Lower Units
06-28-2025, 01:48 PM
Replies: 21
Views: 1,981
Posted By hpmaniac

So the upper on the xr is the weaker link with...

So the upper on the xr is the weaker link with the drive? Save money and get the scx upper and that should be a decently strong set up? And yes we are going to be very conservative on the timing ramp...
Forum: Drives and Lower Units
06-28-2025, 11:45 AM
Replies: 21
Views: 1,981
Posted By hpmaniac

Need upgraded drive advise

2003 velocity 280 with a new xr outdrive, about 30hrs on unit.
Current engine is a sci 575 with some upgrades making around 650-675hp.
Engine is getting a new cam, heads and intercooler, power will...
Showing results 1 to 25 of 163
 
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