Well I purchased my 7 pretunned by PF and after looking at other users setups I woundered if there are any benifits to swapping out for a Power FC.

What are some opinions.

 

PFS PMC was the **** back in mid to late 90's. Your looking at an 8x8 grid to tune with so the ecu does alot of extrapolation between points. You still have the 3k stumble with it (PFS PMC. Some have had great success with it and it depends on what your going to do with your car if you should get a Power FC.
What's your plans with the car?

Tim

 

If it ain't broke, don't fix it.

 

The system worked well for me. The reasons I replaced it were:

1. EVERYBODY seemed to have a PFC, and that means shared tech information etc. i greater... and more people are familiar with tuning them.

2. Access to information and boost control with the commander. I had a water temp guage on my car for a while... goddamned thing was basically a christmas light. Wasn't accurate. I LOVE being able to see water, air tems, voltage, etc, right off the factory sensors.

I know there was a "Commander" of sorts for the PMS, but it just wasn't as handy.

 

if you run seq. twins...I think it has a better control than the PFC. I always liked running 12psi on the primary and 13 on the secondary.

 

I'm with Mahjhik on this. Don't fix it.

Mine works great. I prefer the PFS to the PFC for a street car. No 3000 rpm hesitation here.

 

ok, well it looks like ill keep it. I may swap out when i decide to go single turbo.

 

That's possible???

 

If we all did this, we would be driving almost stock cars.

 

not only possible its more stable control.

the WG and PC get tuned with vent values...per PSI.

so if you have the pri and sec set at the same PSI and vent value, the ECU has a hard time with the secondary boost control (in some cases).

I would set the learn function ON, set the vent value (low or high...can't remember which meant more boost...but start at a low boost setting) Make a couple pulls until the ECU learned the primary vent control...then up the secondary PSI by 1psi and repeat this time allowing the secondary to kick in. Then turn learn OFF.

CAUTION: Only do this if you are tuned and have the fuel for the PSI you want to run.

a boost pattern of 12-10-13 is a very fun ride...and yield my car 301rwhp with a stock block.

 

I have seen a lot of people have problems with the PFS unit. If it is working... great but be ready to encounter problems and replace it.

Although not adjustable I run the Pettit unit at 9-10-10 psi on a stock block and get 300 rwhp That includes running a cat.

 

For some people, that wouldn't be a bad idea.

 

this was with a main cat and stock IC as well.

10 psi and 300rwhp is a little hard to swallow on a stock block...but we did use different dyno's

 

I agree - for your car as-is, leave it be. Down the road, the PowerFC would likely be a good idea. Funny part is, when the PFC first came out many people stated "who would want to go to that, there's such huge support for the PMC and it works fine" .

The PMC was one impressive computer for it's time. It's outdated now, and it's limited by the fact that it has to operate with the stock ECU's parameters.

That's interesting about the boost control - the PFC's boost control is quite frustrating. But, I think the same problems could be found with anything that works with the stock boost control setup - it's just not that flexible.

Dale