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-   -   Ecutek Tune for 3.6R (Powha! brought to you by Visconti Tuning) (http://legacygt.com/forums/showthread.php?t=204846)

Perscitus 04-02-2013 08:24 AM

Ecutek Tune for EZ36D 3.6R
 
3 Attachment(s)
It's alive! After a full day of dyno runs and off the dyno fuel and ignition map smoothing, we have an ECUtek tune for the 3.6R. Much respect to John Visconti of Visconti Tuning for spending 4+ hours tuning the engine from scratch. The man has the patience of a saint.

Below is a summary of what we ended up with as the base map for a 3.6R with a CBE and a fairly stock intake (AEM DryFlow drop-in filter, milkjug delete, HKS funnel). Modest gains, as we should expect for a NA motor, but some good stuff nonetheless. Especially the low-end torque.

REVISED **: 231wHP (286 bHP) / 252 ft lb wTQ (331 ft lb bTQ)
OLD *: 231 wHP (277bHP) / 267 ft lb TQ (332 ft lb bTQ)
Redline limit raised to 6.75K just for fun.

* - assuming an avg. AWD/AT combo drivetrain loss of 20%
(likely a bit conservative, should be closer to 23%, but I don't want to inflate the #s)

** - actual losses seem closer to 23-25% for 3.6R H6/5EAT combo
and the wTQ figures in the dyno runs below are inflated due to torque converter amplification prior to lock-up. With that the revised bHP numbers are above.

The biggest gains John was able to get for us (surprisingly, even to him) are down-low.
Between 2500-3300RPM. Throughout that range HP shot up by 10-15, torque by about 20.
Its practical and fun since this is the ideal range for the H6 under most driving conditions.

Most of the gains were achieved through modified cam timing.

Right after this, there is a strange dip in torque @ 3000 John couldn't smooth out (no matter what he tried) - perhaps a function of the AT torque converter. He might try again next time with updated ECUtek software (coming soon) that will give him some additional features and controls.

And finally more modest (but still consistant) gains from 3500 - 5200/5400 (new peak) and on beyond 6000 (where both HP and torque level and then drop off). As-is, there is not much more to squeeze out of the engine.

John optimized the fuel maps (leaned out, flattened), adjusted cam and ignition timing (more aggressive), removed load limiters, deleted the speed limiter, optimized fuel injection. Disabled some DTCs, raised the REV limiter to 6,750RPM (just for kicks).

Butt-dyno impressions on the drive home... Sure, its not a 2.5GT but this thing can MOVE! The car feels lighter, more nimble. Throttle response is much improved. Power is smooth and comes on stronger than before. Pulls hard from 1.5K - 3.5K. Much stronger @ 2K than stock. With traction control off, the rear gets understeer happy and wants to come loose under hard acceleration. Overall I'm very happy with the results. A proper 'Stage 1' for the NA H6.

Crappy cell phone pics/video and dyno plot coming soon!

Cost? $150 for dyno time (call it my contribution for the 3.6R brethrens out there) + an extra $150 for the custom tune!

At this price, I think the gains are well worth the cost. John might charge more now that he's developed the baseline for the H6 motor (its his and Ecutek's IP now) but I can't imagine getting a reflash from him in NY or CT would be significantly more.

Give him a shout, ask away on FB, etc.

Update: Dyno run plot for two late-tune runs.

1st (in green) before John optimized the cam timing.
2nd (in red) closer to the final tune, post cam timing tweaks.

Notice the low-end power and torque boost and the dip I wrote about?
With the cam and ignition timing tweaks, he was able to pickup some power and torque throughout the RPM range.

I dont have a pic of the final tune #s but they are v close to the red run here.
For baseline stock whp was closer to 204-206. Baseline tq arround 198.

sschmelcke 04-02-2013 08:40 AM

Only 300 bucks!!!! I'm in

GTEASER 04-02-2013 08:47 AM

Nice work man!!!! Glad to see you 3.6 guys are able to play around a bit with the powah!!

ItalianLegacy 04-02-2013 08:48 AM

now to add boost and tune :)

sschmelcke 04-02-2013 08:49 AM

what gas did you get tuned on? 87 or 93?

Perscitus 04-02-2013 08:52 AM

This was with 93. Map is safe to run with 89 as well.
When John has more time, he'll develop a 87 map for us too.
And then using the CC stalk, we will be able to switch between 87 and 93 maps (at ignition).

If you meet up with him in CT, maybe fill up with 87 and see if he can tune to that using the map he developed on mine as base.

sschmelcke 04-02-2013 08:54 AM

i only fill up with 87. i found no difference with 93 especially when the car isnt designed to take advantage of it

ItalianLegacy 04-02-2013 08:57 AM

I crave more POWAAAHHH!!

Perscitus 04-02-2013 09:00 AM

Quote:

Originally Posted by sschmelcke (Post 4370309)
i only fill up with 87. i found no difference with 93 especially when the car isnt designed to take advantage of it

Me too. I only put 93 in there so that the lower octane rating wouldn't be a limiting factor during the tune. Our compression ratio is high enough for a 6 cylinder that its a bit safer to run 89 during the summer months. Still, with the stock ECU I got the best milage and performance with 87. I'll fill her up with 87 after this tank is gone and see if I get knock or any issues. John thinks we should be fine.

sschmelcke 04-02-2013 09:03 AM

if you speak to him soon see if he can give you a final price. my birthday is coming up in May so Id like to take a trip down. let us know how the mileage is with the tune

MN3.6R 04-02-2013 09:07 AM

:eek: MUST HAVE NOW

feesh 04-02-2013 09:36 AM

Quote:

Originally Posted by MN3.6R (Post 4370324)
:eek: MUST HAVE NOW

What this guy said. $300 total? Is there any other equipment to buy?

MN3.6R 04-02-2013 09:40 AM

Also I am wondering, are these numbers to the wheel or crank? I thought I saw somewhere that these cars lose almost 100hp at the wheels? I'm not trying to squash the great news, just trying to figure it out. 20hp and 21 ft-lbs of torque for $300 is great either way.

Rutchard 04-02-2013 09:44 AM

Tuning on 93 then going back to 89 or 87 oct sounds like a recipe for disaster. Now if you're switching between maps okay, but I sure wouldn't run anything lower octane than what I was tuned on.

eckseleven 04-02-2013 09:52 AM

Quote:

Originally Posted by MN3.6R (Post 4370379)
Also I am wondering, are these numbers to the wheel or crank? I thought I saw somewhere that these cars lose almost 100hp at the wheels? I'm not trying to squash the great news, just trying to figure it out. 20hp and 21 ft-lbs of torque for $300 is great either way.

I'm guessing they are estimated at-crank power.


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