How much does the calibration really matter on a manual transmission truck? More specifically, questions like this....

What would happen if you ran the Whipple with 92 octane but on the factory computer settings?

What would happen if you ran the Whipple with a 2.5 inch pully on 92 octane gas but with the computer recalibration you get from Whipple setup for a 2.75 inch pully?

And a really interesting one for you guys.....what would happen if you were running a Whipple recalibrated computer but had removed the supercharger? I ask this because of eventually selling or trading the truck, I would rather remove the whipple and sell it on the side.

Thanks

Timing must be retarded one degree per pound of boost. The fuel curve must be modified and the injectors size burned in . The computer will need to be reflashed if you pull the unit off.

Edit: Oversimplification flag thrown up by Doug904 (Thanks!)

To get the most out of the supercharger, you should get it programmed properly. Timing is everything, especially with a supercharger!

Distributor models: Reduce your initial timing a few degrees and use an ignition box that will retard your timing by RPM or Boost pressure (Boost reference being best), to eliminate detonation under boost. Quick rule of thumb to get you started, 4&deg initial retard from stock and one degree per lb of reference boost. This requires something like the MSD-6BTM and some major tweeking time. I cheat, I keep the timing advanced 5&deg and turn the BTM to 3&deg per lb on the street. This way, I have avoided getting a chip until I have everything the way I want it, then the chip ties it together,then I reset the timing to the chip makers recommendations.
The 1&deg per lb of boost is for high grade fuel, put in the cheap stuff, on a hot day, or with oxygenated fuel, and it could be 3&deg per lb or more. That is where a dash adjustable control comes in handy.

DIS models: Get a high quality chip from someone that knows what they are doing. Apten is currently doing the re-flash for Whipple, so there is a safe bet! :)

Other things that help:
-mounting the IAT in the plenum AFTER the boost, this will measure the heat created by the compressed air (up to 244&deg before the IAT/ACT tosses a code!).
-use water or methanol injection, this lowers the air charge temp and this reduces the need for major timing corrections.
-keep the underhood temps down with hose covers, ceramic coating, etc.

The computer reburn does more then adjust timing, I've seen the numbers and nowhere in the curve does it retard it. The Whipple kit comes with a diifferent mass air meter and injectors so it adjusts the computer to work with both. It also controls timing curves and some other functions of the engine. The engine will not work correctly if the MAF/Injectors are used without the computer reburn.

Later Doug904.

how would you mount the iat in the plenium after the boost without the boost blowing it out or by it some how just qurious?

Drill and tap the hole for an early (threaded) IAT.

thank you, I'm not fimiliar with the early model but tap and thread says enough.