Any one ever add NOS to a blown EFI engine (or to a standard EFI for that matter). I have a 454 Mag MPI in my 23 foot cat. I am adding a B@M EFI supercharger (been sitting in my garage for 8 mos!). This is going to get me to the low 90's. Whats the point 100 is not far away! I was thinking of adding a small NOS shot or adding a superchiller although I have heard the intercooler is not as effective at low boost levels. Does anybody make a NOS system which has a plate for the Mercruiser EFI? An extra 100hp and a lab finished prop should get me to the promised land

GO for it
I run a TOP GUN system with my blower

Hey guys, that's what I'm trying to get figured out right now. I'm wanting to run NOS on my N/A 502 and I need to know how much fuel pressure the stock Mercruiser pump that's connected to the raw water pump supplies.

A stock fuel pump is good for a added
100hp nos system with existing carb

Agent Man, I can't quite remember, I know your supposed to retard timing 2 degrees per so many added horsepower. What is that number?

What is the best system out there right now or are they pretty much equall? What is the best and most simplest device to adjust timing before you hit the button?

Secret Agent what size bottle do you run ? I bought a sniper kit for my carbed motor but every body I know said it would be a waist in a boat

I used to run 1 degree of retard per pound of boost on my last turbo setup. Also, 1 point extra fuel octane per pound of boost has the same effect I have read. Sec agent may know more. I have solved my original dillema. I am going to add a superchiller which will add 50 to 75hp. Then, if I need more I am going to have a little head work done and add some aftermarket exhaust manifolds. this should easily put me over 100

Wait, SR24, Cleveland Oklahoma! I was on Keystone last weekend and saw two HTM's. Was one you? One was an SS the other an SR (you?) I also pulled up to an SR24 about 3 or 4 weekends ago on Keystone by the boat ramp at pier 51 marina and talked to the guy for a second (you?) I have a 23 foot wyatt tunnel with purple, red and black stripes.

Hey OkieTunnel! It was me. I have the purple and blue SR-24. I don't remember talking to you at Pier 51 though. I talked to Wyatt all day Saturday at House Boat Island. He's the one that got my blood pumping about the NOS. The SS-24 is a bad little boat. It is a blown 540 built by Gary Teague. I went for a ride with him a couple of weeks ago at the Thursday night get together and with 5 people we were running 100.