A few questions about SMC/PAC alky kits....

[Pats-GN]

Hello all, first off, I've got an SMC kit I purchased back in the summer and havent had a chance (lazy) to install it. Now I see all these post about Razors kit and have a couple questions. Basically, should I buy the new progressive PAC kit, or just get the progressive controller for my SMC? I dont want the "bog" associated with alky and want good drivability. My car is basically stock for now. Thanks for the help.

pat

 

[Razor]

First, some cars respond very well without the need for a progressive. It depends on boost level wanting to be run, type of turbo, converter, etc.. For higher boost(20+ PSI), things change. The bogging can be addressed by upping the turnon point. But too high a point will lead to knock.

The only thing I will say, the current SMC progressive Steve has, is not adjustable on its ramp speed. And limited to 20 PSI due to the internal transducer built into it. This may change, but my understanding is currently, thats how it is.

The issue on the ramp is how much is being sprayed at what boost. To be progressive means as the boost rises so does voltage to the pump. This voltage creates higher pressure.

So for hypothetical, at 3 volts the pump produces 25 PSI. At 10 volts the pump produces 100 PSI. If your not able to adjust how much voltage the box puts out going to the pump, then you cannot tune the car in.

In laymans terms, if your car operates optimally at 15 PSI boost with 50 PSI alcohol.. and the pump used requires 5 volts to generate 50 PSI alcohol, you need your controller to be able and supply 5 volts at 15 PSI boost. If it puts 6volts, too much. 4 volts too little. When it goes to 25 PSI it needs 8.5 volts.. you see where this is going.

You cannot tune individual boost points with my controller, but its accelleration is linear(adj) to the fueling requirements the motor needs. And chip programming can make up a lot of fueling linearity issues.

Lots of guys happy with theyre SMC kits..

I'll leave things at that.

 

[salvageV6]

There should be NO bog with any alky. kit when properly installed.

You may notice it come on, but no way should it shudder or bog the car down.

It's designed to make you go faster.

Since you haven't put any kit on yet I would start with what you have and tune it.

Should you feel the need to change or upgrade from that kit then decide about changing.

I doubt you will lose all that much money on selling it new vs. 4-5 months old either way.

If you do remove the kit and store it, leave the pump in the alky.

 

[Razor]

Actually for storage, drain alky and run marvel mystery oil straight through it. And let the pump sit in MMO instead of alcohol which can evaporate.

So cars bog.. other dont. Some get transitional knock retard, other dont. What works on one may not work on another.

Be glad when you have a system that doesnt Ping the KR detector when you mash the pedal. Or blow black smoke when it fires.

 

[Pats-GN]

Thanks for the replys, guess I need to install it and see what happens.