MSD BTM -or Custom Chip? with a supercharger

[oldfox]

Hi, I'm running a mostly stock 5.0 punched out 30 over with a kenne Bell supercharger. I'm running a MSD-BTM that has the adjustable timing retard located in the glove box.
I have been told that this is old school and the way to go is a custom burnt chip to control the timing. The BTM has a vacuum/boost hose running to it and I can control how much timing retard I get for each pound of boost.
If I accelerate slow I can pull 5,600 RPM with no boost.
Or I can punch it at 1,900 RPM and get 6lb boost
How does a chip in the computer know how much boost or when the supercharger is boosting to retard the timing?

[wick]

It has no idea what the timing is. Its a set program that pulled timing and throws fuel. It must be custom tuned though on a Dyno. Worth it.

[yeahloh95]

i am still running a btm and a fmu but hope to change that out this year a chip will make your car run better than not having one , it just depends on who does your chip

[wick]

As Troy says, it does make it run better. You are also limited to what you can do once you are chipped. I ran a BTM for a short time with an FMU. One day a few summers ago I was at full boost, about 14PSI, on stock heads. The BTM failed and my windshield was covered with a nice green substance. Blew the head gaskets right out.

[yeahloh95]

oh i have a chip along with those other parts i am getting rid of them and will just have a multi position chip next , i too have had the head gasket problem but mine was a loose dist. causing it .