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Old 03-06-2015, 02:22 AM   #1
jonbonazza
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What a dyno tune can do for you.

I have gone through a couple different etuners (who shall remain unnamed) before I moved out here to Cali and gained access to a number of quality dyno tuners.

I decided to take it to Church (hah) as I track the care regularly (in fact, I track it more than I actually drive it on the street), and everyone I know who tracks their car swears by Church.

Sean went above and beyond the call of duty for me. I told him that I didn't want a dyno queen, I wanted power and torque curves that matched my usage of the car. He spent all of the next 3 hours fine tuning each part of the curve to make sure he extracted all of the power and torque possible in the places I needed it most. Sometimes this meant sacrificing in other places, of course, but thus is the nature of the beast.

When the car was first put on the dyno with the latest etune, the power was abysimal...In fact, with a full exhaust, I was only making a few hp over stock. Just flashing his base tune I went up to 188hp (for reference a stock frs runs about 175hp on his dynopack dyno). After much fine tuning, he was able to get the car up to just under 192hp on 91 octane. Afterwards, he generated a 93 octane map based on the 91 octane map he just did and even with the car pulling timing all over the place (I was still running 91 octane gas, after all) I was still able to reach 194hp. With the right fuel, I think I should be able to reach 196hp with that tune.

I guess I should also mention my current setup:
- FT86SF Catted UEL header
- Motiv OP
- Invidia catted FP
- Invidia N1 cat-back

I am very happy with these numbers, especially since I still have BOTH cats. I just ordered a different cat-back (the N1 is a great cat-back, but it's way too loud for me) and I hope to go fully catless in the near future, so I have no doubt that I can break the 200whp mark.

Anyway, enough of me yapping, here is the dyno plot (red=etune, blue=91, orange=93):
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Old 03-06-2015, 02:26 AM   #2
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btw, max deltas are 26hp and 16ft/lb
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Old 03-06-2015, 03:08 AM   #3
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Isn't there a basically stock 200 HP car running E85?
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Old 03-07-2015, 04:55 PM   #4
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Quote:
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Isn't there a basically stock 200 HP car running E85?
Unfortunately, we aren't all so fortunate to have e85 stations conveniently nearby.
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Old 03-10-2015, 04:56 PM   #5
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Aren't those numbers at the hub?? Not at the wheel right??
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Old 03-14-2015, 04:12 PM   #6
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Quote:
Originally Posted by nunonuna View Post
Aren't those numbers at the hub?? Not at the wheel right??
Um... what? I don't see why there would be a difference in power at the hub verses with the wheels on. The reason power at the crank is different than power at the wheel is because some power is lost when transferring it through the drive train to the wheels.
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Old 03-14-2015, 10:27 PM   #7
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Quote:
Originally Posted by jonbonazza View Post
Um... what? I don't see why there would be a difference in power at the hub verses with the wheels on. The reason power at the crank is different than power at the wheel is because some power is lost when transferring it through the drive train to the wheels.
As far as I know it makes difference.
Wheels & tires are rotating mass which would be around 40 lbs. each. I think dynapak is known to read higher than dynojet.
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Old 03-14-2015, 10:30 PM   #8
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Quote:
Originally Posted by nunonuna View Post
As far as I know it makes difference.
Wheels & tires are rotating mass which would be around 40 lbs. each. I think dynapak is known to read higher than dynojet.
Hmm it would affect the speed, yes, but horspower and torque should be independent if that. If I am wrong here (and i may very well be), i would say that measuring at the hub is a more accurate measure then, as there are less variables to take into account.

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Old 03-14-2015, 10:45 PM   #9
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You gained 10%. Doesn't matter what numbers you use (wheel vs hub) as long as the gains are repeatable.
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Old 03-14-2015, 11:53 PM   #10
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You gained 10%. Doesn't matter what numbers you use (wheel vs hub) as long as the gains are repeatable.
This.

Delta is what matters, not the absolute number.
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