I just ordered the Diablo Pred. When I get the handheld tuner, do I need to download the most recent version (if it's not already on, of course) from the Diablo website before I do any tuning with it??

 

Just plug it in and use the standard tune they have or modify it yourself. I didnt download anything when I had mine.

 

What all does the standard tune adjust??? Just A/F??

 

It adjusts air/fuel ratio, and spark timing.

 

I wish Diablo provided details on their performance tune ....meaning, how far they advance the spark timing ect.... I also wish they provided more detail on what the updates are.

Does anyone know how much the Diablo tune advances the timing?

 

i havent really messed around with mine but i think it goes up to 13 advanced. if you have a automatic measure your tires to get the the best shifts if you have a diablo then you know what im talking about. for downloads i think you have to have the data cable and if you do have the data cable get a custom dyno tune and compare it to the diablo updated versions. when i first got my hands on my diablo i was literally at the track in line to make my run and i put the tune in and forgot to change my parameters for my gears and my car shifted at 5500 but i still ran a 13.5 at 102. when i was stock i always ran a 13.5 at 103 so the tune is pretty good even though i wasnt redlining.

i dont know what the diablo tune does but you can modify the diablo tune thats what i meant by up to 13 advanced.

 

I actually went to radio shack the other day and got the serial cable and power adapter so I could download the newest tune from Diablo, which I did yesterday, but it doesn't give any detail on what the updated tune is. I guess the best thing to do is give them a call or send them an e-mail. I also would like to ask them about advancing the timing within the diablo tune already installed. I'm just afraid to mess around with it too much cause I don't want to make my engine go BOOM! ha ha

 

Not to call bs, but a 13.5 STOCK, with an auto is VERY hard to believe. Sorry, just want to know how you pulled that off. Sorry to hijack... :angel7:

 

Mabye he's talkin 1/8 mile???

 

FYI: I finally recieved and installed the Diablo tune, with the change for my gear swap, turned off the rear O2's and trac control. I noticed a good diiference in HP (s.o.t.p. feel) gain after the install, i think. I'd like to get it on the dyno now to see how much she's pushin. BTW, I have some Steeda MIL eliminators if anyone wants to buy them. I'll let'em go for $30 plus shipping.

 

That should be specified by the tuner/retailer that you ordered it from. The amount of timing advance depends on the fuel that you should have specified when you ordered it. Some people have 91 octane available while others have 93. The higher the octane, the more advance you can handle. Most of these devices have the advance set at 14 degrees while stock is 10.

 

Thanks for the info MT#1. I actually bought it used from another guy that lives near me in CA so I'm assuming when he bought it he specified what grade fuel we have in California, plus the guys had pretty much the same mods as me and didn't have a custom tune from diablo...so far so good.

Another question. I purchased the serial cable and power adapter so I could download the latest tune from Diablo....how do I get info on what that updated tune actually includes? They just give a brief description on their website "revision to support new calibrations".

 

Sorry can't help you there. You are now seeing the downside of buying a used tuner. You need to contact Diablo. I have heard that Diablo does not support second party sales. In other words, only the original registered owner is entitled to upgrades etc... Let us know how you make out.

 

sorry to cut in like this but here goes my answer.....


yes it is. with stock horsepower and stock gears i ran a 13.6 after i got the 3.73 i ran 13.5 now that i have the tuner i dunno what my car will run i did have the predator tune but i didnt change my gear setting. here are my time slips from 20 mar 05 in cecil county md. i am car 60 my first run i forgo to turn overdrive off thats why i only went 100. i only made 2 runs that night tire pressure at 20 my first run and 22 psi for my second pass. launched between 1000 and 1500. oh yeah i made my passes with bald *** nitto 555 none drag radial 245 45. i now have 275 40. im hitting the track between the 14- 16th i should hit a 13.3

 

i just got the revised tune this weekend. at first, my car was acting wierd, the shifts were jerky. (automatic tranny). but now it runs fine, i dont really see a difference between this tune and the one it came with before the revision.

stupid ? time:
what are the o2's , what do they do/how do they function, and why turn them off?

:newbie:

 

Bucky:

You Mustang (and mine too) is equipped with 4 O2 sensors aka oxygen sensors. Two are located before each of your cats, and two are located after each cat/s. The forward O2's are critically important to the operation of your car. They monitor the air fuel ratio and send a voltage signal to the car's computer. The voltage signal is between 0 - 1 as I recall. This signal tells the car how much fuel to add based on the air fuel ratio and keeps your car "tuned" properly.

The second set of O2 sensors are less critical, as they are located after the cats and monitor the performance of the cat converters. They help the car stay emissions compliant, but really are not involved in any active decision making loop that I can think of.

When guys remove their cats, they don't need these sensors anymore. By shutting down these O2 sensors, that annoying SES light won't activate anymore. It's important to keep that light off if it is needlessly on incase you really have a problem.

Hope that helps.

 

i have a steeda cat back, and i have never had any lights come on (since i left the cats on), so i guess i dont need tot turn mine off.

thansk for the informative reply, you guys are great!

 

bucky, I just installed the latest Diablo tune as well and I don't see any difference either other than my gas mileage going back down to crap. I'm hoping it was just my driving and not something the tune did cause I'm not sure how much longer I can afford $2.75 a gallon for Premium gas here in california.

I sure would like to know what each of the updated tunes consist of. I e-mailed Diablo and asked them just that and I got some fluff response back basically saying that they are constantly working to improve each tune and the latest one is the best so far. No details. Oh well, I tried.

Just 2 quick questions: It seems since I installed the Diablo Predator the engine fan comes on a lot more and my car is running cooler. Is this the concept that if your car runs cooler it's not strained as much and will result in better performance???

Are any of you guys running a 180 or 160 degree thermometer? If so what is the benefit?

Thanks.

 

The only time you would probably need to turn them off is when you change the mid-pipes from: stock to 2 cats or to O/R pipe

 

about that tune.... (revised one)..

i noticed some gas mileage dropping too. i figured it was because i have been puting the car through its paces trying to notice a difference between this tune and the previous. so far, i really dont notice too much, maybe a little, very little get up and go. my fan hasn't kicked on yet.

if i notice the gas mileage going to crap in a hat after a couple weeks normal driving, i'm going to see if i can re-install the original tune it came with.

my gas mileage went from 215-230 miles a tank to
175-200 miles a tank.


and thanks to everyone whom answered my noobie ? about the o2's lol.

 

175-200 out of a tank of gas! Ouch, you must have had your foot in it pretty good. I usually get 260 miles out of a tank, but when I had the previous tune installed I was getting 290, now that the new tune is installed I'm getting 240-260 depending on how I drive....I'll give it a couple more tanks of gas and then maybe e-mail Diablo and ask them what's going on.

 

oops, i just realized that was a type lol.

the actuals are more like:
315-330 before
275-300 after new "improved" tune.

anything under 300 is pretty unacceptable to me lol.

 

Damn, that's pretty good gas mileage.....do you do a lot of freeway driving? I saw a thread the other day on a stang site, not sure if it was on this website, but it was asking people about gas mileage and some guys are getting like 175-200 out of a tank. That would get very expensive!

I kinda wish I would have just left everything alone and used the tune that the predator came with. Oh well.

 

Damn!! no kidding, Iam gettin just over 235 miles but I also got 4:10s installed? also depends how I drive too

 

no, it's only a 10 minute commute to work.

i drive it about 4 times a week, around town, running errands, and to and from work.

i do get on the gas sometimes ( i like to go fast) but i notice the needle at the end of the day going way down, so i dont do it that much anymore.

my friend has a yellow 01 gt, manual, only performance mod is some different mufflers. he couldn't believe if when i told him i average around 300 per tank of gas, he says he averages around 245-260.

my car is modded with 3.90's, steeda cat back, and CAI.

guess i am lucky with my v8's, i have a 4.6 cougar xr7 that i have always gotten at least 300 out of.

 

Yeah, your are lucky getting that kind of mileage out of your stang. It's just so damn hard to keep your foot out of the gas though! ha ha

 

I run a 180 degree thermostat,I didn't notice any difference how the car runs and the temp gauge doesnt read much lower than with the original stat installed. I will probably keep the 180 stat installed. I have a hypertech tuner and they recommend 93 octane and also offer a optional 160 degree stat they sell. My car will ping slightly under load with 92 octane fuel from some stations but doesnt ping with amoco or bp fuel. I have thought about replacing the spark plugs with one heat range cooler plug,anyone have a opinion on that?

 

This is a reply to your question from 2005-04-15 13:55

CATEGORY: Predator
QUESTION: [i recently installed the most up to date tune for my 01 gt mustang. since then, my fan kicks on a lot more, and my gas mileage has dropped from the range of 300-330 miles per tank to 185-215 per tank. driving conditions are not different, and i am still using premiuim fuel. no gas leaks, and nothing out of the ordinary is going on with the car. it is in perfect running order.

what is going on?]

------------------------------------------------------------

ANSWER:
Dear aaron,

Adjust your fan settings so they do not turn on as much. Do you have a different thermostat? Also Gas milage varies from vehicle to vehicle. Even the fan settings may have the vehicle run more rpms than needed this will bring down the gas milage as well.


Thank you for your interest in DiabloSport!
Stay tuned,
Cole Stevens, a proud member of the DiabloSport Support Team

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Do not reply to this email, you will not receive a response.
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Bucky, let me know how adjusting the fan works out cause I have the same problem as you with regards to the latest tune.

When you go in and start adjusting settings within the predator I think it saves the adjustments you made, but in order to install the adjustments do you have to restore the original tune and then re-install the diablo tune with the adjustments?

 

Wurd.

Nice numbers bro.