Offshoreonly.com - Timing a custom supercharged engine

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Quote:

Originally Posted by HaxbySpeed (Post 4272344)

Different sensors have different calibrations, 1 bar 2 bar, etc. For a 1 bar (atmospheric ) sensor, 5 volts is 105kpa/14.7psi/0" vacuum/1 bar. Depending on how you want to read it. When your engine pulls a vacuum, it is still reading pressure, unless you boat in space, there will always be pressure in your intake, even though we call it vacuum, it's only pressure below atmospheric - 14.7psi

I find my best top speed is when I boat on the moon. Being that it is a nonstepped boat, it just works better there. I really have to overdrive the blower alot though, and I keep getting moon rocks in my strainers. :bong:

I agree on the boosted deal. I was responding to VC, about whether there would be worthwhile gains on his na deal to run a map based timing setup.

Quote:

Originally Posted by HaxbySpeed (Post 4272513)

I agree on the boosted deal. I was responding to VC, about whether there would be worthwhile gains on his na deal to run a map based timing setup.

I figured that. Makes sense on the N/A to just do a RPM based map. Heck, even on my engines the rpm based map prob still be better than locked out.

Quote:

Originally Posted by MILD THUNDER (Post 4272166)

I was just discussing this today on the phone with another oso member who wants to try it on his big power blower motors. I have yet to purchase anything though. Its not really feeling like spring is anywhere near!

Joe, just so that you know, I have the new Daytona Censor ignition boxes/equipment and will be incorporating them into the supercharged engines set-up Dave is building for me now. He has called and spoken with the owner of Daytona and really believes the guy knows his stuff about ignition.

Good to know Mark! My two options are the msd 6530 vs daytona sensors. While the msd is a bit cheaper, I am kinda leaning towards the daytona boxes. Seems like they have a few more features , and from what I hear top notch quality.

Quote:

Originally Posted by Black Baja (Post 4198481)

I finally did get the detonation taken care of with a 20% mix of race fuel and 93 pump gas.

Take a look at Boostane...it could be an easier/less expensive alternate solution for you.

Some great info here, definitely will keep tabs on this. May be a direction I go in the future as well

So tell me if i have this correct: take either the MSD or Daytona box, you have to lock your distributor at where you want your highest advance.. Lets just say 42*, now you set your start up retard to like 15* to 500 rpm then however your going to program through the rest of your curve, bla bla bla... Now? what happens if the box takes a poo? And the box won't take timing out... you are locked at 42* and will idle fine and you go up on plane and blow your motor cause it didn't retard??? WTF??? I would really rather have a box that could add timing.. not just take away timing. So, do I have this wrong? and is there any fail safe?

Quote:

Originally Posted by Bawana (Post 4272590)

You cannot "add" timing. You can't trigger the spark "x" amount of crankshaft degree before the distributor (or crank trigger) actually passes the magnet. You can only take timing out.

Also, in reference to the daytona sensors..... The CD-1 comes with a new coil (worth 80
To 100 bones), a USB patch cord and all the software. It also has a +5 volt terminal for powering up external sensors (MAP sensor)

Exactly what i was worried about Banana, that box takes a dump goodbye motor.