What settings for timing and fuel are you using on your Diablo Predator?
- Thread starter 3.8L_of_Pain
- Start date
triggz
Founding Member
Whoa, first off- all you people who added fuel you are WASTING fuel and horsepower!
I leaned out 6% to 4k, and 4% beyond and achieved a very nice A/F on a dyno. (The power loss is due to backing off the timing completely to see if it was gaining anything, it was at 4% on the first pass).
I obviously picked up some power with the fuel adjustments, since my peak hp didnt change by removing the timing advance (you can see where timing was helping though)
I leaned out 6% to 4k, and 4% beyond and achieved a very nice A/F on a dyno. (The power loss is due to backing off the timing completely to see if it was gaining anything, it was at 4% on the first pass).
I obviously picked up some power with the fuel adjustments, since my peak hp didnt change by removing the timing advance (you can see where timing was helping though)
340.29m/s
New Member
Has anyone else had a dyno while using the predator? I have a feeling that adding fuel down low is ok but up top people will be running extremely rich.
jstreet0204
Active Member
All cars are different. Unless you hook your car up to a wideband, I wouldn't mess with the fuel settings, otherwise you are shooting in the dark. Unless you've made modifications to the fuel system itself (MAF, injectors, etc) The EEC will do a fairly good job keeping it in range under WOT. Once you hook it up to a wideband you can dial it in closer.340.29m/s said:
triggz
Founding Member
Yes, that is generally the procedure. Tuners often adjust the timing to the point that pinging just vanishes, and then back it off another degree.DeathMetal said:
After all of these posts, I don't think we have any definite conclusions on optimal timing and fuel settings for the Predator. There are many opinions, but I don't think most of them are backed up by conclusive evidence. We need to get to the bottom of this and not depend on anecdotal evidence!
BTW, I posed this question to Diablosport. They said the Predator is provided with a default performance tune and changing fuel and timing was not necessary. Although I am very happy with the Predator, I was not satisfied with this response.
Tylerb59
Banned
3.8L_of_Pain said:
Yea, but what are they changing to make their tune ...performance? Without advancing the timing ...
I advanced my spark +4 in low / high and riched my low WOT fuel by like 3. I was looking at my dyno sheets and I'm pretty lean in the low band and it evens out well enough. I didn't mess with the high band WOT fuel.
I messed with my advance a little. I noticed you guys were advancing +4 high and low. I did that and it sounds fine, so I went +4.5 and it still sounds fine. Could I keep going up until it pings and then back it up a little? Or should I just leave it alone. I basically want to advance +.5 at a time until it misfires then back it up .5 Does that sound bad? Oh yea, I'm using 93 octane too BTW.
triggz
Founding Member
3.8L_of_Pain said:
The richer A/F is stock.
My timing as advanced 6% currently, no pinging on 93. I would like to find out what these percentages equate to in degrees..
...I'm with you there triggz. It would be nice knowing for sure if 4% advanced is the same as 4* advanced like with the Steeda T/A. Even more so, how much is the timing advanced by Diablo when the Sport tune is installed. I imagine it has been advanced, just how much is the question. It certainly doesn't make sense to run the factory 10* timing and call it a Sport tune, same goes for the fuel adjustments. I’m curious because I’m using what I guess would be called the standard Sport tune from Diablo. I ordered from partshopper and either failed to fill out a form for my current mods, or there wasn’t one to fill out. So, it’s the Sport tune right out of the box for my make and model year.triggz said:
Another thing of confusion for me. Those of you using the predator to adjust a rich fuel condition, are you running cats in your mid-pipe? Seems that after I installed my prochamber without cats, plus the MAF to Intake mods, it created more of a rich fuel condition. I don’t want to run too rich and surely don’t want to run too lean.
Would someone who has had more than a week and a half to play around with this programmer be willing to help out and provide timing/fuel settings that would at least be a decent starting point to tinker with?
Thanks,
-Cale
Q's Stang
Member
The percentage value is of what your stock timing is. i.e. let's say your stock timing is set to 10* and you add 4.5% on the Predator. Well that's just .45* so now your timing is to 10.45*. You will only get a total of 1* advance. I have my Steeda T/A set to 13*and my Predator to 10% advance of my stock setting of 10*. So my new stock timing should be 11*. Read this
triggs i bet you would gain a decent amount of torque if added some more fuel to the bottom end...
i tune my camaro, and i just order a predator today for the stang.
torque likes to be on the rich side and hp lean(i think someone mention this earlier)
i shoot for around 12.5 for peak torque then lean it out to around 12.8-13.1 as the hp goes up...
also has any done a datalog of the stock tune and one of the predator performance tune to see how much timing it adds?
i tune my camaro, and i just order a predator today for the stang.
torque likes to be on the rich side and hp lean(i think someone mention this earlier)
i shoot for around 12.5 for peak torque then lean it out to around 12.8-13.1 as the hp goes up...
also has any done a datalog of the stock tune and one of the predator performance tune to see how much timing it adds?
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