Hi,

im from Germany so please sorry for my bad english.

I have a Baja 272 with a 2008 496HO, its the late model with the new cover.

All my friends who are using the old style 496HO have the problems with the black transoms, I do not have this problem. So my question is, are there any differences in the ECU on the old style 496HO and the late model ?

I would like to upgrade to the Whipple Stage II upgrade, looking forward to gain 1-2mph on my single engine Baja 272. Anybody here who can tell me some experiences about the Whipple Stage II ? Will the upgrade work on the 2008 496HO as well ?

Is the upgrade on the late model the same upgrade as it is on the old style 496HOs ?

Best regards,

Norman

Really nobody here who can tell me something about the Whipple Stage II ?

Best regards,

Normen

upgrade to CMI or Dana is a lil cheaper,,,,exhaust,,,, depending on the setup,,,, I have people gain 3 mph.

I had this problem with my 2003 496HO's. I found out they never received a Mercury computer upgrade that resolved a fuel injection voltage issue. Have the serial numbers on the ECU's checked to see if they have the latest program. I sent mine to Mark at Precision Marine to get re-programmed. http://www.pmefi.com/

The Whipple stage II program works well. Should pick up a couple of mph. However, it does require premium fuel. The stage II kit has much more aggressive timing and includes a colder thermostat to help prevent detonation. Available fuel quality is the key. Otherwise the stage 1 program will gain you a little bit and still run 87 octane.

Bob

My 2002 Baja had transom soot with the stock 496HO and still has it now with Whipple's Stage 2 - I'm going to install an 02 sensor/air fuel guage to try to find where it's running rich.

Hi,

thank you for your replies ! Our fuel here in Germany starts at 95 or 98 octane, so this wont be a problem.

I thought that more guys here are using the Whipple Stage II on a stock 496HO ?!

When I could gain 1 or 2 mph topspeed it will be worth the money for me...

@ obnoxus: I dont want to spend that much money this year, even there is much more work to do when installing CMI´s, connect them to my Corsa etc.

Best regards,

Norman

read about the different fuel qualities between Europe and USA, you will find that their 87 is similar to our 95.

Wiki it.

Oh and what psi does stage 1 and 2 run, and what hp?