Is keydiver right for me????

[bsbllfit7]

Hello all i am upgrading my car and want to upgrade my ecu and tune it. I am wanting it to be a daily driver and something that i can rally around town in from time to time. I dont want to do too much of my own tuning so im thinking the keydiver chip would be best for me. Im looking to throw in an evo 3 16g, 660 injectors and 190lph fuel pump. I have all necessary bolt on mods to accomodate this (upgraded bov, full exhaust, intake,boost gauge) Will a stage 3 chip from dsmchips do these things for me? I have a logger so i can log but dont want to do too much of this. Also i will be getting a wideband but not right now. Lemme know if this will be a good thing for my car?

 

[habitatguy187]

Can't go wrong with keydiver unless you want instant timing control.

 

[matthewdesigns]

His chips are great. I really like mine, been using one for about a year and a half, and his customer service is outstanding. For a car that you don't want to try to wring every last drop of power out of it's hard to beat. Drop it in and mash the go pedal

 

[the_mork]

I have no personal experience with keydiver chips but I hear they are great.

The only thing that I have to throw in here is that you really shouldn't be scared of tuning because it isn't particularly difficult to get into and becomes quite fun. Becoming a good tuner takes time but most of that time is spent playing in your car.

 

[LTUDSM]

Hello all i am upgrading my car and want to upgrade my ecu and tune it. I am wanting it to be a daily driver and something that i can rally around town in from time to time. I dont want to do too much of my own tuning so im thinking the keydiver chip would be best for me. Im looking to throw in an evo 3 16g, 660 injectors and 190lph fuel pump. I have all necessary bolt on mods to accomodate this (upgraded bov, full exhaust, intake,boost gauge) Will a stage 3 chip from dsmchips do these things for me? I have a logger so i can log but dont want to do too much of this. Also i will be getting a wideband but not right now. Lemme know if this will be a good thing for my car?

you might want to grab an AFC to fine tune your Chip,because Jeff is not 100%accuratte.But he burns the chips really close......

 

[caliboy23]

I've had a couple of Jeff's chips now. The first one was for my big 16G with 650cc injectors. And now for the T70 with 880cc injectors. Not 1 single complaint. I've never had a single problem with Jeff's chips, or his customer service. And especially since your mods are SO incredibly common. I think your setup is similar or exactly the same as about 3/5 of the people on this forum.

You won't be disapointed

 

[bsbllfit7]

alright and for now im throwing in a 14b with 750's and the 190. Should i get the chip burned for that but have the boost set to like 14 or 15 and then monitor with boost gauge and logs? I want to be able to throw in the evo 3 without having to reburn a chip!

 

[habitatguy187]

You can run 20psi with that setup as long as your cylinder temps aren't too high.

 

[matthewdesigns]

Use a logger to monitor your timing, and have the chip programmed to display knocksum on your factory boost gauge, and buy a wideband as well. An afc can be handy, but is not always necessary. I use one with my chip depending on how hard I'm pushing the setup.

The chip does not care how much boost pressure you run. What it does is control the larger injectors (among other things), which are what allow you to push more air through the motor. Bigger injectors and pumps allow you to keep enough fuel in the cylinders to avoid knock and running lean. Try to start thinking of airflow in lb/min rather than boost in psi, since airflow and rpm are the values the ECU uses to keep your motor happy A certain psi on a small turbo won't yield the same airflow from a larger one at the same psi, so airflow vs injector flow is really what's important.

 

[MY1GDSM]

To bad you don't have access to the State of Oregon DAS Motor Pool(they have a E85 pump in Salem)
you could run E85 and have Jeff do a dual image chip... even running only 20 psi on the 750's you'll be able to notice a huge difference over gas because how much more timing you can get away with E85
We need more stations out here in the NW

 

[bsbllfit7]

So will my chip be burned to allow a certain amount of psi though? cause i have the 14b now but want to throw in the evo3 soon. I know there is a massive amount of difference in cfm so i dont want the psi to be set so high on the chip. I would rather have it at 15-16 and then use the boost controller to get my way up to 20 or so

 

[the_mork]

PSI isn't generally controlled or tuned for in a cookie cutter tune. For example here is a fuel map (specifically from an evo probably a 9).

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Please ignore the dots it was the first image I found. Basically what you have is a spreadsheet with different RPM and load points. There are a lot of factors in load but a basic rule of interpreting it is that 100 load is equal to 1bar or ~14.5psi so 0 load is absolute vacuum, 100 load is ambient atmospheric pressure (0 psi), 200 load is about 14.5 psi above ambient conditions. So you see that you can mostly compensate for any boost pressure.

A 16g and a 14b are similar enough that there is very little difference from a tuning standpoint except for the peak flow which means that a tune for a 16g can really be used for a 14b but that a tune for a 14b may not be quite as good on a 16g but only because you might not tune the higher load areas that the 16g can reach that the 14b can't.

Now the real clincher is this, once you pass about 10psi you want to maintain the same target now matter how high you go. It goes a little bit like this, 0-70 load should point to a crusing AFR such as 14.7-15.3. 70-180 load should mostly point to an AFR of 12.5. >180 load should very quickly taper to low 11s, my personal target is 11.3 AFR. Timing matters too but is mostly a matter of RPM with some retard for higher load.

Short answer? Get your chip set up for your injectors and a 16g then run the 14b as much as you like. Chances are that there is minimal difference (or none at all) between Jeff's 14b and 16g tunes because he probably just runs the same tune for any TD05H turbo.