No one is seeing 18psi on a 3 inch pulley with the Novi 1000 supercharger. I think you're thinking of SOS guys with the Novi 1200 and a non-factory sized crank pulley because the supercharger is more capable than the original Novi 1000.

 

That may be but the consideration is the cost of the re tune once you change map sensors. So its closer to a $500 mod that may or may not be absolutely necessary.

 

[QUOTE=CourageOO7,Oct 1 2009, 06:19 AM] No one is seeing 18psi on a 3 inch pulley with the Novi 1000 supercharger.

 

With or without a new MAP sensor, if you're going to be running more boost then you're going to need to get a new tune. You can't just change pullies and think that you'll be good to go since you didn't get a new map sensor.

 

Thats true, I forgot you were changing your boost also, though you will be spending more time and money at the tuner developing a whole new tune rather then an hour making some tweaks.

 

get aftermarket map sensor and see the correct boost. that way you could drive your car to sea level and not grenade it.

 

With the AEM you should just be able to switch the MAP sensor option to the correct one. That way the ecu will know what voltage is what boost pressure. Anyway, I tune my own car so I can post up later and let you know...but I really think it's going to be a touch up in the upper rev's and an adjustment to the MAP sensor setting option in AEM Pro.

Anyway, obviously I'll be getting a new MAP sensor. I was really just wondering if someone at altitude found that a new MAP wasn't necessary at these boost levels because absolute pressure is about 15% lower than at sea level.

 

remember, once you change the map sensor to the new one, if its a aem 3.5 bar, the load break points will scale to 16 equal spaced points from -15 to +30ish. then you can change the scale to say -14 to 18ish. but all your load break points will change.

have two aem pros open. and cut and paste from old tune to new tune rows that match up the closest and calc the rest to get ball park. sounds worse then it is.

ALSO, check your vtec crossover points as they are voltaged based and will change when you wizard the new map sensor.

 

[QUOTE=CourageOO7,Oct 1 2009, 09:09 AM] With the AEM you should just be able to switch the MAP sensor option to the correct one.

 

I'm in Denver and I'm running the SOS 3.2" pulley on my CTSC. The highest boost I've seen with this setup is 9.3lbs (damn altitude )

Scott-