You better!

Joking

 

haha the sharks are circling

 

Thanksgiving???? me thought it was Columbus weekend....

 

What's that?

 

Lol US vs Canada

 

Man on the evo forums guys just throw up the dyno sheet and done. Too much suspense and procedure going on in this place : P

 

Yea I kno. I checked there website. They claim their pulley and tune on the str will gain 55hp. For 799 for the tune and their pulley is 150 which is pretty cheap. Years ago they told me they can tune str's

 

On the turbo'd Mark III's specifically, the upgrade consisted of:

1. fitting stock 7M-GTE maf sensor to maf housing from a V8 Lexus which flowed much more air for the same sensor output

2. fitting 550cc injectors which flow much more fuel for the same duty cycle

3. optionally fitting a rising rate fuel pressure regulator

You are basically tricking the system into thinking that it is metering the stock air/fuel quantities when you are really feeding it massive increases. No tune required because the component selection was worked out by someone with regular access to a dyno.

 

I did a bit of research. Seems that Columbus day is not celebrated in Canada because we know that Columbus didn't discover the new world, the Vikings did several centuries earlier. Much like Canadians, modern Scandinavians are far too polite to make a big stink about it, so we smile, nod and say 'that's nice'.

Seems also the many stores in the US hold giant Columbus Day sales in retail oulets. This is to reenact Columbus's act of suddenly showing up and taking everything he wanted as though it was his own.

Haven't figured out why beds and mattresses seem to be featured in these sales. Maybe it's to put emphasis on what was done to the indigenous people after the arrival of the Spanish fleet?

Canadians celebrate Thanksgiving at the actual end of the harvest. If we waited till US Thanksgiving, we be eating snow and not food from the fields and gardens.

So, assuming Jake survived his turkey induced stupor, I'm sure he'll be posting the analysis of his results shortly. Raw numbers can some times be misleading. Gotta make sure it's apples/apples.

 

Yes, I don't understand our love of Mattress sales on Columbus Day.

 

Ok guys, my apologies for keeping you all waiting, the Thanksgiving day long weekend really had me sidelined,

So on Friday evening, I returned to the dynamotorsports dynpack dyno, running the same 91 shell V-power, along with near-identical temperature and weather conditions. Same 30 minute drive over with a short cool down prior to the runs.
In terms of peak numbers, the eurocharged tune gained 7.1hp, and 4lb-ft of torque.

If you look closer at the dyno chart, and examine gains at other parts of the powerband, you'll find gains between 10-15lb-ft of torque in a few spots, as well as 10-15hp along the entire run.

This roughly 10-15hp gain is visible and consistent across the whole powerband,

So there you have it folks, not a wild gain, but that was somewhat to be expected. If you look beyond the peak figures, you will see there is a small bump across the whole powerband.

Moving beyond just peak numbers and WOT performance,

Here are some of my observations with the tune over a week now. I've had a chance over the course of a week to drive and really feel out what the tune did for driveability,

I'm not going to bore you guys with the details, but it seems like there has been a small but noted improvement across most driving conditions for me, particularly in the mid-range under throttle. The tune might be taking advantage of the 3lb pulley, as I feel more lively performance from my usual 1,800rpm - 3,200rpm blasts,

I have also noticed much less gurgling/back-firing/popping from my exhaust on deceleration / engine-braking,

On the third pull with the updated tune, we got some pinging around 5,000rpm briefly. Never had the motor ping before, and this may be due to more aggressive timing/whatever. I am going to be stepping up from Shell 91 V-power I usually pump, to sunoco ultra-94, to help guard against detonation. It's possible the ECU might be able to take advantage of the extra octane.

Following clip from dyno with the tune:



Overall, I feel the tune has demonstrated to make more power, maybe not as much as some may have hoped, but about what was reasonably expected,

I have picked up on some small changes in response and performance, particularly in the mid-range, as well as a slightly stronger pull to redline,

Further good news is when it comes to time to tuning around more hardcore mods such as twin-screw upgrade, I can count on Jerry and the eurocharged software to do it.

This is that extra little bit for the STR, and I had a lot of fun over the last week dyno'ing it, testing, and driving it.

edit:
Little bonus video of me vs modded SRT4, this was from thursday with my tune done.

 

Thank-you, thank-you, thank-you!

 

Thanks for all your hard work on this project, GT42R, including that first-class documentation. Like you, I'm kinda disappointed, had hoped to hear something more like 20+ HP. I don't think ECU tuning is going to be on my "must do" list for much longer.

 

Well that was a bit anticlimactic...

 

+1 . Nothing better than hard data!

Cheers!

 

I wouldn't have expected anything else to be honest, but don't you have any a/f ratios measured?

You can advance the timing a little in these cars, which for a stock car would yield the most hp. But once you start increasing the boost/heat you are altering where the peak pressures lies during combustion, so at a certain point you even need to retard ignition (as the combustion process goes quicker due to the boost/heat) to gain more power. So an ECU tune should be customized for the mods one has, and here I would say you have still got a good gain. Do you know how much timing they advanced, and how much they changed the a/f ratio?

Very good that they can alter these ECU’s, that’s another positive here.

 

Thanks for posting.

Would be good to see what they can do with a TS

 

Not too shabby - 7.1 rwhp achieved. How much did you pay for this tune? If its around $800 USD then that's a pretty good bang for the buck. Speed costs money, right?

Now we know of a reputable ECU tune with gains that are dyno proven. I had realistic expectations for you because our cars are supercharged, not turbo'd. Turbo cars love ECU tunes lol.

Thank you for being the forum's guinea pig, and thank you for your wonderful documentation. If I didn't have my car listed for sale, I would get the same tune.

By the way, nice SRT4 kill. Those are pesky little foukers and they humble their opponents lol (nothing like getting humbled by an Dodge Neon). I've killed one too on the highway once

 

What makes me scratch my head is stock STRs dyno in the 330whp range and with the mods you are at less than that. Granted I think those were a dynojet, but that still seems like a huge difference.

 

No two dynos will ever put out the same numbers. They are just good for measuring gains, if any. Also they are good for acquiring data while under throttle.