Went to the Dyno Jet this afternoon

[MPFab]

I'll have a vid up shortly.
After dynoing the other night on a Mustang dyno, I wanted to verify the 8% difference between the two.
It still holds true!


Has anyone made more hp/tq on pump gas?

Video here:http://youtu.be/kOzgjOP1j0U

 

[Luv2xlr8]

Does Forza count? Lol

Great numbers especially for a 1.4L.

 

[Preloader]

What mods do you have besides 3" exhaust and tune?

Is it Trifecta tuned?

Those numbers are impressive. I find it hard that you don't have more than an exhaust and a tune.

 

[MPFab]

What mods do you have besides 3" exhaust and tune?

Is it Trifecta tuned?

Those numbers are impressive. I find it hard that you don't have more than an exhaust and a tune.

Mods are listed here: http://www.sonicownersforum.com/for...gine-discussion/8058-dyno-graphs-tonight.html

 

[Preloader]

Vince must be getting better at his tunes. When did you get it?

I can't imagine hard charge tubes making that much of a jump in power. Do you run the car on the dyno? Any special technique to pull the most power?

Again, I'm very impressed with those numbers. That's like 25% more hp and 60% more tq than stock.

 

[MPFab]

Vince must be getting better at his tunes. When did you get it?

I can't imagine hard charge tubes making that much of a jump in power. Do you run the car on the dyno? Any special technique to pull the most power?

Again, I'm very impressed with those numbers. That's like 25% more hp and 60% more tq than stock.

I did hard charge pipes and ported the intake mani at the same time. Net gain was about 11whp.
Vince may infact be getting better at tuning. I like to think my parts are just better..

I was able to log it using VCM Scanner and it looks like there is still a good bit of power left on the table. The wasn't any knock, timing was low and AFR is supper rich up top. IDCs were MUCH lower than I expected them to be at this power level. GM must have changed something in 2013, based on what the general concensus is regarding IDCs for 2012 Sonics. Plenty of duty cycle left.

There are no tricks to get good numbers on the dyno. I put the peddle down about 200rpm before I hit the sample button..that's it.

I've picked up right at 60whp and 100wtq with my mods. That's more like 45% more powah , and 75% more tq!!:banana:

 

[Preloader]

Even better....

I applied my math using stock power as wheel instead of crank, dropped the ball.

 

[MPFab]

Pre, I would expect that your red pill on E85 is pretty nasty. Ever dyno it?

 

[Preloader]

I dyno'd on e85 before the race clutch and red pill tune..... 171hp/213tq. But Vince saw my logs from that day and said it was way off. I've come a long way since then. When work slows, I'll try to get a current dyno before the big turbo upgrade.

But yeah, it feels damn fast now and Vince has my tune dialed in with as much timing as it can take after a series of logs and updates. I sure hope I'm close to the 200whp mark.

I've got some feedback about the differences between e85 and 91 now that I have my flexfuel working:

91: smoother throttle response and clutch engagement from stop, but violent sudden peak power at about 3,200 when boost spools up, causing the tires to chirp when it hits in first..... Then falls a little flat towards the top rpm

e85: sensitive throttle and launch, hard to finesse it to not peel out, but power band is much more linear, doesn't break tires suddenly during WOT like 91, but definitely stronger and pulls faster all the way to rev limiter if you're not keeping an eye on the tach

 

[Preloader]

Maybe it's time for a build thread, I was going to ask a question there bit couldn't find it, so I'll ask here:

What's next? I'm pretty sure you are at the limits of the stock turbo. Do you have plans to take it further?

More power is accessible with more boost, but that's not necessarily a wise or reliable approach with all things else being stock.

 

[MPFab]

Maybe it's time for a build thread, I was going to ask a question there bit couldn't find it, so I'll ask here:

What's next? I'm pretty sure you are at the limits of the stock turbo. Do you have plans to take it further?

More power is accessible with more boost, but that's not necessarily a wise or reliable approach with all things else being stock.

Based on the logs I saw Fri. while at the dyno, I feel like just tweaking the tune would get me to 200+whp on 93octane.
I have no interest in raising the boost. At peak torque I'm seeing 25psi with that slowly decaying to 20ish around 6,000rpm. (ZERO KNOCK!:banana
The gains will come from increasing timing and leaning out the fuel curve past 5,500rpm. It drops into the mid 10s past that and peak timing is LOW. I'm hoping I can get Vince on board to make the tweaks I need. I sent a log in once I was told everthing looked good. Apparently everything looked GREAT.
After seeing how conservative the tune actually is, I feel like getting another 12-15whp is quite possible.
After that who knows. I do not want break this thing, so that's most likely it.
I have a 600hp Evo that keeps me plenty entertained when I need a quick "ludicrous speed" fix.

 

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Did you tune your WG with a handheld pump? Or just go off a boost gauge or an ultragauge?

 

[MPFab]

Did you tune your WG with a handheld pump? Or just go off a boost gauge or an ultragauge?

I haven't messed with the WG at all. What ever boost curve is commanded by the tune is what it makes.
The boost readings were from the dyno's pressure sensor that was tapped into the intake manifold. I don't even have a gauge in the car.

What kind of pressure are you seeing on E-85?

 

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21 peak. But Vince says its because its reaching optimal tq output without needing more. On 91 is see a peak of high 22s.

 

[MPFab]

21 peak. But Vince says its because its reaching optimal tq output without needing more. On 91 is see a peak of high 22s.

That's interesting that the boost would be lower on E-85... although have you considered that it might be a function of lower EGTs on corn gas because of it's cooling properties? I friend of mine noted a 100deg reduction in EGT(don't remember if it was "C" or "F") from just swapping to E-85.
If the turbo is infact maxed out, then a change in EGT could potentially raise or lower boost output depending on the delta of the temp.

 

[Preloader]

But interestingly there should be more exhaust volume, considering the the higher amounts of e85 needed to create the same explosion energy. I always thought that that would compensate for the lower EGT properties. But now that I think about it Temperature is what dictates a gas's volume and density. So you may have a valid point.

 

[MPFab]

From my experience with E-85 in the Evo, there is a noticeable difference in spool up(2-300 rpm) that people attribute the the density of the E-85. I'm no scientist so I can't say whether that's a valid explanation or not, but it does spool up better.
Have you noticed any of this in the Sonic?

 

[Preloader]

Absolutely. Like I said, with 91, it suddenly hits full spool at about 3.5k and comes on so dramatically that the tires slip in 1st.

With e85, the spooling is more linear, earlier and while it doesnt peak so dramatically that it breaks traction mid-WOT like 91, it is noticeably more powerful across the entire tach..... Not to mention it swings the needle from 5k to the limiter at 6.5k faster than the stock tach can keep up.

Look at my e85 dyno again, remembering that this is stock clutch, blue pill and admittedly (quoting Vince) maladjusted tune.

Notice how the hp platforms and continues to ever slightly rise? Not showing any signs of dropping until the limiter drops boost. I'm gonna quote yours right below for an easy comparison.

 

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My magic seems to happen between 3 and 4k, while your happens between 3.5 and 4.5k. I'd attribute that to the differences between e85 and 91.

 

[MPFab]

I don't think yours is a great graph for comparison. It was obviously not optimal, and though my graph drops off, you have to consider than my peak power at 4600 is 20+whp more than what you're producing at that rpm. That's why yours look flatter and peaks latter. You do make about 8-10 more than me past 5.5K, but I think if I can get my AFR out of the low 10s there, I'll match your output up top...atleast based on this graph.