[Rusty Shackleford]

I swapped it back to my Gearhead tune after work for the ride home to what a back and forth would feel like.

Not alot different in normal driving but jumping on it is different. Both go very well but the MPT revs up quicker and deeper. Less boost though.
And the MPT shifting isn't quite as smooth. It almost feels like it drops one gear to low when I do foot to the floor when going from a say,40- 50 MPH roll.

Two different animals but seems like, performance wise, similar results.

 

[Rusty Shackleford]

I agree. The 0-60 for the MPT blows the Gearhead tune away. Very snappy. But once rolling the Gearhead tune feels much better.

It just seems so odd though as the revs on the MPT go close to 6000 whereas the GH doesn't go that deep. I have the MPT in again. I am seeing if it will grow on me.

 

[Rusty Shackleford]

It sure gets up the RPM range in a hurry. Makes the engine scream. Well as much as a 6 cylinder can.

Been swapping back and forth every day since the last weekend. Both have different pluses. Just not sure which I like better.
The MPT off the line quickness and general throttle response keeps pulling me in that direction. But the upper end GH pulls me that way.

 

[Rusty Shackleford]

When you say knock is -3 under full pull, is that using the lower case "knock sensor" pid, or the upper case GLOBAL KNOCK pid?

I am not sure to be honest. On the gauge it just has knock.

MPT has the file with the 6 gauge pack and I downloaded it. It has Boost, Knock, Load, Iat2, Coolant temp and Spark. All of them are in Caps on the n-gauge.

I was unaware of a Global Knock.

In the email with the link to the file,they say if knock gets over +5, to do a log and send it to them.

 

[Rusty Shackleford]

No worries then. I'm sure they know which is knock and which is adding. I was curious because one pids reads one way, and the other reads opposite. If they know that + is bad, then I would run with it. Although I would not allow it to hit +5 of knock, 3 is my max and even then I'm going to get rid of that. But since yours seems happy in the negatives, dont sweat it.

Ahh I see.

In the email MPT sends with all that info it actually says that + is bad.

 

[Rusty Shackleford]

My pr-x usually is in the negative. It usually does hit + every time I drive but it is not WOT and it has never gone over +2.9 usually a lot lower

Under acceleration mine is always in the negative. Bouncing around the -2 and -3.

My situation is the same The only time I see + is cruising under light load over a minor hill. And only sometimes. When it does it bounces around the +2 to +5. It doesn't concern me. Now if it were under full steam then....

The GH tune does it under the same circumstances as well. (the plus thing)

Are you trying out the GH tune again?

 

[Rusty Shackleford]

Good idea to get that issue resolved. Hope the clamps solve it. That would be a nice easy fix.

I have been running the MPT for the last few days. I really like the tune for throttle response in regards to tooling around town.

 

[Rusty Shackleford]

I don't look every time but the few times I have glanced at the gauge on the GH I have seen low 18 once but mostly mid-ish 17. The MPT high-mid 15's. Maybe low 16 once.

On the youtube video's I saw a guy that had a gauge and he pegged 15. MPT's website says 20 +/-. I guess it is minus.

 

[Rusty Shackleford]

That would be ideal.

Unfortunately the n-gauge's OAR function at the moment is non-functional. It will be nice when it does work though.

 

[Rusty Shackleford]

Got my 91 PRx tune loaded and it runs great, with 1 exception: it won't shift into 10th gear. Anyone else had this problem?

Nope. Goes into 10th on mine.

 

[Rusty Shackleford]

Just a little tidbit.

On my way home after work and cruising down the highway and come to a light.
A guy in a very new looking Chrysler 300S was in front of me and when the light changed he took off.
I thought why not and put it down to the floor.
Stayed right on his ass up to 130kph (80 mph) then we caught up to traffic. I actually had to lightly let off as I was creeping up on him.

I thought, that's not bad.

 

[Rusty Shackleford]

I have to commend MPT for their customer service.
Late last week I emailed them to inquire about de-activating the auto start/stop, plus let them know about the knock while going up slight grades and about the lowish psi.

Well after a follow up from them, the next day I got a file for the tune with the stop/ start turned off. Very nice.

They also want me to do a log to let them see about the knock. I said it wasn't a big deal because it's not under significant acceleration, they said please send one anyways if I could so they could see for themselves. So this weekend I will get some time and a spot and do a run.


Then they said that they usually get 17 or so psi stock and it gets pushed to 19 with their tunes. 2 psi over stock. I get 3 on my truck, so spot on.
Boost numbers isn't a biggie to me as the tune puts you into the back of the seat.

Anyway, I thought I would let anyone who wants an MPT tune that if they want the auto start/ stop either left on or disabled, let them know in the comment box when ordering, and that they will also receive pretty darn good, friendly customer service.

 

[Rusty Shackleford]

I put in Chevron 94. Expensive as hell but it is what it is.
I read that Grimm said our gas isn't up to snuff with the boys from the South. The guy that has built the last 3 engines on the Mustang says the same. Otherwise I would have went 93 PRX.
Better to error on the side of caution I say.

I received a response from Mike at MPT as I let the sales guys know that there was interest on octane adjustable tunes.
Mike said their tunes are auto adjustable.
His quote " the truck has adaptive octane feature from the factory. It’s nothing special. Even our tunes have adaptive ability still"
But he also said " I would only run 93 if you have access to 93"

And he also said to do a KAM reset if going from 87 to 93 with the adaptive tunes. (I mentioned I have a GH tune)

 

[Rusty Shackleford]

If I had nothing better to do, I would definitely fill up down there. It's an pretty much an entire afternoon on a weekend and the travel would eat up most of the $$$ savings. Maybe when (or if ) I retire and have extra time.