Offshoreonly.com - low compression 548 dyno testing has begun!!

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Quote:

Originally Posted by Gimme Fuel (Post 4543370)

It was cheap enough to buy for a dyno test. Was considering it for my rebuilds since I was considering procharger them at a later point. Don't know until you try! This one never had flow claims made with it. Hard to find flow data on any brand. Wilson's 105 mm claimed around 1500 cfm. I figured this at a 102 mm should at least break 1000 cfm easily. Apparently not so much! Might work good on a much lesser engine, just not in this 6700 rpm 548 haha! When I do my rebuilds next winter, we will dyno them at Articfriends place. Probably slap it on for squits and giggles since I own it already. We also have the 2200 dominator throttle body as well. I am planning 509's staying at or below 6000 rpm with much less cam than this motor we tested.

In research, whether data is good or bad, it is still data and tells a story!

I want to see a dyno video!

Quote:

Originally Posted by articfriends (Post 4543386)

I want to see a dyno video!

I'll get it posted! Give me a bit.

https://youtu.be/HIQyuQC0Ca8

This is first pull with the 102mm monoblade throttle body.

Open header glory pull with 1" open spacer, 1" blended spacer, and 2200 cfm dominator throttle body.

https://youtu.be/Oaefqzb8ml8

Outside cold idle with mufflers.

https://youtu.be/vmE8Zr1wrOU

Quote:

Originally Posted by Gimme Fuel (Post 4543447)

https://youtu.be/HIQyuQC0Ca8

This is first pull with the 102mm monoblade throttle body.

Ive videoed before and the computer screen looks like it blinking when recording, you dont see it w your eyes but dhows on camera!

Quote:

Originally Posted by articfriends (Post 4543476)

Ive videoed before and the computer screen looks like it blinking when recording, you dont see it w your eyes but dhows on camera!

The refresh (screen) rate and camera video frame rate are similar or a multiple of each other (aliased). You are actually seeing a picture of the screen refresh. Just like a strobe light works when setting timing.

Quote:

Originally Posted by BajaDan (Post 4543899)

Thats sorta what i was thinking too, i have all new data aquisition thats going on w flat screen, windows, usb, mouse, color graphs and overlays etc. Done dynoing till its in place, got a new hp computer, monitor, ordered a regulated power supply to run 02s etc, still waiting on a few things to show up

Quote:

Originally Posted by articfriends (Post 4543070)

A pair of 5" inlet cheap gibson boat mufflers, they knock noise down pretty good and they dont seem to hurt hp too bad although the torque picked up pretty good with them off

Bobl has a "muffler box" for his dyno.. Exhaust noise is almost non existent.

Kindof spooky tho' hearing every noise an engine makes.. :fear:

http://i130.photobucket.com/albums/p...pspx11ljxs.jpg

Quote:

Originally Posted by Boatally Insane (Post 4544183)

Thats really cool, wonder if it has chambers or baffles in it, looks like a GREAT way to test wet exhaust too, i have to assume it has some kind of sump in bottom to colkect water then pump it back to supply tank? Mark rinda told me to bury a septic tank w sump pump and dump water into it but i poured ALOT of new concrete before getting dyno and not going to tear it out. So far i spent 8000 putting a new well in (needed one anyways) , 2000+ on 8 02 sensor system, then bought regulated power supply to batterys, mercruiser cannon plug harness, 3000 on data aquisition, regulated power supply to run it, computer, flat screen, sensors etc. Next purchase will be ducted air supply to push heat down and away from exhaust then if it starts making money will build a addition and cell on side of building, wet exhaust recovery tank and if brake ever goes bad buy bigger brake (everything elses just about is new)