Anyone know why ACE recommends using the stock Rover MAF in line with the much larger GM MAF and 4 inch throttle body. After my dyno tuner removed the 3 inch Rover MAF the motor ran better and picked up 50 horse power with just that change, indicating that air was flowing more freely through the intake system, which is what the motor wanted and needed.
I drove the Rover home from the dyno tuner about 125 miles without the Rover MAF installed and noticed no drivability issues or warnings lights on the dash. Why run the stock MAF if it is going to strangle the LS? What info does the Rover MAF provide to the Rover PCM, if any?
I’m vexed by this one.
LM4 with Truck Norris cam, by the way. Otherwise very stock.
Further research has revealed the MAF helps control shifting in the trans. So what’s the solution???? Run the stock Rover MAF and give away 50 horse power but get better shifting, or don’t run the Rover MAF?
What does a stand alone transmission controller cost, and is it worth the cost?

 

Post this under the "discovery 2 LS Conversion" a couple threads down. You will get your answers. that is the thread for the ACE swap/questions....

 

It been said that it uses data to calculate load for shifting.

I was curious about this so I unplugged it and tested it for about a week and then plugged it back in. Honestly my butt dyno can't tell a difference. I ended up getting rid of it and running cold air from the fender.

 

Thanks Mr. Boostle. My only concern is causing a transmission failure. How many miles have you driven without a MAF?

 

I'm about 4k miles without the land Rover maf. When I'm accelerating on the highway I can feel the trans hunting between gears but that happens with it plugged in as well. My plan is to go to the standalone trans controller so I can rev it out a little bit.

 

I wanted to go that route too with a Compushift trans controller…..but the company that makes it is out of stock and has been for years. Do you know of another trans controller that works with ZF transmissions?

 

PM captainaaron. He recently made a thread about compushift setup it looks like he scored a unit recently.

 

Ha ha. I just talked with Captain Aaron about 3 days ago about this topic. He did find a Compushift unit on eBay. I have not been so lucky.

 

@Tracecollier@yahoo.com @Boostle
I setup an alert on eBay for Compushift so it let me know whenever there was a new listing. I got an alert this morning: https://www.ebay.com/itm/26618850634...Bk9SR5ywueTjYQ

It looks like you would need to buy a new 4HP24 harness and generic throttle body connector from HGM (~$300).

 

Aaron,

Do you have the setup up and running?

How much better is it? Worth the investment?