05 DE Z.

I got tuned a while back in January, did 229hp and 216tq on an AWD mustang dyno at PRT in lewisville by steven.

My question is that translates to only 263, dynojet, and thats giving it a generous conversion amount of 15% lol...

Breathing Mods are:
AMS high flow cats
Hks Rep
Z1 Plenum spacer
K&N Cone filter

Also before the tune i swapped in fairly new oem injectors(40k mi) as my car has 133k on it cause it would ping at around 3k on decel, so i swapped injectors out to try and alleviate the issue, but me and steven could not get the ping to go away. It would pop up randomly, but i think when the car was hot towards the end of the runs it was triggering more.

He was only able to advance the timing by how much i cant remember i wanna say 5*, it was well under what he said the normal amount is when he tunes z's. He also had to run my car a little richer than normal, i wanna say 12.8, but my understanding is that 13 is okay for our cars.

Im leaning towards the Knock sensor harness giving me trouble and causing my car to detect knock on decel around 2600-3000, but i dont really know, havent really found anyone with an issue like mine on this forum. It will put the car into high det map when it pings also and i can only clear that when i shut off the car.

Other than that if i keep the car out of decel around 3k it runs pretty good. I just feel like im missing some power somewhere, be it issues internally or electronically. I think the issue with the knock sensor is sporadic, but i dont wanna tear into the plenum before i find out if anyone has had this problem or not.



Im still nooby at the tuning side of things and if anyone has any insight i would appreciate it very much.

 

My 05 de put down 221.9 HP and I forgot the trq..15% 255hp and 240ish trq... Your numbers are above average for a de... Yes 12.8 Afr is optimal for our cars... Post up your dyno chart so we can have a look... I don't know prt shops rep but all I can say is my Tuner said your car can make more power but it will lack drivability and other turners only care about high HP numbers and not drivability... Maybe this is your problem...

 

Here is a picture of the dyno graph how we left it, i had to get him to email me a picture because i lost my hard copy.

PRT is pretty good though, i think most if not all the z's and g's in dfw use him.

He said he had to be pretty conservative with my car because it didnt seem to like alot of timing.

 

that is around normal for your car, my car (08 HR) on the same dyno hit 286 hp

 

Okay awesome, i was having a hard time finding where my car is at because of the translation from mustang to dynojet. That's good to know. As for the knock sensor on decel im thinking it was just bad gas, shitty winter blend i bet. Who knows. If worse comes to worse i will replace the whole damn sensor/harness.

My next step is cams and long tubes or shortys i havent decided yet. Would like to keep my gatos.

 

long tube will get you the most without tearing into motor... rumor mill has it that motordyne is going to make some. mustangs average 10-11% lower than dynojet, but remember it is just a number. if you want to see on a dynojet, call adm performance in lewisville.... they are mostly a chevy shop but i imagine they will let you do a couple pulls

 

Thats what i have heard and i was trying to decide if i should wait for the MD longtubes or not. i may wait a few months though and see the reviews.

Funny enough i work next to a classic muscle shop that has a dynojet, about 10 steps to my right out the door, i may go there but cause of what you said i dunno if i need to :P. I probably will for a baseline before the headers and cams though.

Thanks for the info i appreciate it!

 

What is MD claiming? 2hp for 2 grand? Cats,tune and gears is best na bang or buck . Knock sensor would pull timing and lose power.. Take it back to Tuner and he can log a run and see what is going on

 

We logged it and it would only pull timing on decel around 2.5k-3k, it wont ping on accel or anything it only seems to "knock" on decel in that spot which confused the hell out of me and him.

After it pulled timing it would be in high det and we could only clear it by restarting the car.

 

you gotta pay to play, but when i changed from cats and gemini exhaust to art and tdx2 combo i gained 12 hp after retune

 

Did you go from HFCs or Stock cats to ART pipes?

 

i had the kinetix hfc's

 

Then thats that's a nice gain indeed.

 

A VQ and most if not all modern engines can't ping on decel since the ECM cuts fuel. You must have a bad sensor if you're registering knock with no throttle input...

 

Holy chit thats what i was looking for, thank you so much..

Well i say i am going to replace the sensor too but its not throwing a code and it seemed to be working correctly on accel, I am just going to try the sub harness first.

 

Not true.

I was pinging like a **** on deceleration. Letting off around 6k I would get the loudest pings I've ever heard. Pre-ignition from drinking oil.

Mine is a rev-up, though. The cure was one step colder NGK Iridium's.

 

More commonly known as 'shift knock' -- the half second or so when the ECM is still dumping fuel when you let off. Still not pinging during actual decel.