JDM Sam Custom Dyno Tune Results

[1moreMPH]

Nice, I was going to try the plug thing too but forgot to bring mine. I'll have to pop in the new NGKs this weekend; maybe street tune a little more first to lean out my top-end as well. Here are my dyno logs: http://www.mazdas247.com/forum/showpost.php?p=3307912&postcount=228

looks like you could lean it out a bit if you wanted...not too much though. from 3-4000 it gets a little rich. im real happy with these plugs, but ive also heard that the BKR7F's (i think that's right) work very well too. they are stock heat range...im debating on whether i want to drop those in instead of the ZFR7Fs since im only at 8psi.

if not, they'll be up for grabs if anyone wants them.

 

[JDM Sam]

No, run ZFR7F as they are gapped correctly already for you.
These are the correct plugs for your setup do not change them. You are tuned now and these will be the ones you should be using from this point out.

Stock heat range will be ZFR6F
ZFR7F-11 requires you to close the gap down as they are too wide.

BKR6/BKR7 is not the one to use b/c it is not the extended electrode.

 

[JDM Sam]

It detonated b/c of the air temps were very hot. His intercooler, although a FMIC, is not a very thick core. After the long drive here and dyno runs it was beyond heat soaked. It was tuned it to the most extreme temperatures, so when it will not have any hot temp tuning issues.

Also, the stock PCM has a 3000/4000 rpm switchpoint in where it kicks rich. On the street, it is based off TPS/MAF voltage readings. If you tune for one switch point vs the other one will ping while the other will be fine. You have to tune to a safe median of the 2. This is why if you floor the hell out of it from a stop it runs fine, but if you downshift sometimes it doesn't want to pick up untill after 4000. This is one reason why you should not use any piggyback for a built motor if you want all out driveability and performance.

As for the surge in power at 5200. That can be fixed better. If you retune it with the flashed PCM and the VTCS/VICS removed, it will be smoother.


The peak #s may look low, but if you try dynoing your car in 109 degree heat your car will be down on power as well. We did this all in 4th gear which is closer to 1:1 than 3rd is. The key is not having peak #s but having the power curve smooth. This is what makes a car feel fast on the street.

 

[JDM Sam]

Why did detonation come in at such low boost? I understand the long drive and 16 pulls damn!

I have a much larger turbo and J&S and at 13psi with 700lbs+ in passengers started to see some slight flickering in 3rd & 4th. Is that just because the little turbo is spooling at such low rpms?

You need to adjust the ignition timing advance.

 

[BOOSTR]

Nice work as usual JDM Sam. I like how that tune gives you a surge up top. I like to see the chart pattern and gain on 12+ psi dyno run with those paramaters.

What kind of plug is the ZFR7F-11?

 

[low_psi]

NGK, step cooler than stock. I run it when my MBC is installed

 

[JDM Sam]

NGK V-POWER
If you buy the Plain ZRF7F, without the -11 at the end, you will get a plug that is gapped already for you.

 

[low_psi]

Same plug just not gapped to .044?! Good to know.

 

[JDM Sam]

Yes, its gapped like its supposed to be.

 

[low_psi]

But I run a secret gap How do you think I get all that hp outta 8, 9 ,10psi... or whatever the car decides to hold...

 

[Matrix]

Hey Sam,

I looked up the ZFR7F plugs, and it says they're gapped at 0.039" but your website has them at 0.028-0.032"

Do you regap the ones you sell or something?

 

[1moreMPH]

Nice work as usual JDM Sam. I like how that tune gives you a surge up top. I like to see the chart pattern and gain on 12+ psi dyno run with those paramaters.

Yea the surge is very nice, and yet it's still a very smooth power delivery throughout the powerband at WOT. I would love to be able to stick it at 10-11psi daily, but as i said when we turned it up a notch it detonated. And when we re-timed it to compensate for the extra boost it was noticeably slower even at 10psi. I know he hell-like temps and the abuse we put it through on the dyno are the reason why, but better be safe than sorry in my mind, so we tuned it at the harshest conditions And now i know it won't get screwed down the road...

 

[JDM Sam]

Don't you wish this graph would have been legit?

 

[ChopstickHero]

I have the ZFR7F plugs and I regapped them to about 0.035" ... it's really hard to tell what you gap them too... even when using that tool.

damn Sam, those are nice numbers. I need somebody experienced like you to tune my car.

 

[1moreMPH]

Don't you wish this graph would have been legit?

um yes please. I still argue for that being a legit dyno run, you just gotta drive the car right. I think that one time Tony must have railed through 1st like she likes it, then hard on into 2nd, 3rd, and full out on 4th. I mean...it had to have happened, how would the dyno have registered that? She's just very temperamental and you gotta drive her right. it's real i swear. i thought i remembered that run being even higher than that...i thought we were grazing 200.

...and that post sounded very sexual.(braindead

 

[Pirana]

That looks great...good deal!!!!

 

[Speed3.5]

Sam, you guys should use the meth+water juice for those hot days since 90% of the year is hot there anyways.
How you guys breathe over there ?? Oxygen can's with you all the time , lol

 

[Greensleeper]

Another awesome tune by JDM Sam! Congrulations!

 

[SOCAL MSP]

try a daily high of 120 F.... thanks vegas

Dam!! thank god I live in good oh SAN DIEGO where its always 70 to 86 f and with an add of a bomb ass breeze from the beach
rolling with your windows down even at night
No snow ins, tornados,and all that other s***.....PRICELESS

 

[orng1]

Dam!! thank god I live in good oh SAN DIEGO where its always 70 to 86 f and with an add of a bomb ass breeze from the beach
rolling with your windows down even at night
No snow ins, tornados,and all that other s***.....PRICELESS

Hehe that's what I'm talking about. I live about 10min from Long Beach. It's nice and cool here, well not that cool but cooler than a lot of places.