Slopeslider

I was at the track a few weekends back and my right cat developed a noticeable rattle. I ended up replacing the OEM cats with the SpeedTech 200 Cell X-pipe cats. They nicely compliment my Fabspeed MaxFlow exhaust and FabSpeed CF Comp intake. The car sounds amazing and really pulls over 4K. That said, I'm not super happy with the throttle response, especially below 4K. Now that the car is breathing better, I would think a ECU flash would be a logical next step in maximizing / complementing these mods. I've searched and everything seems to be as clear as mud on the benefit of an ECU tune and which one would be the best for my application. Anyone here with similar exhaust / intake mods that has also flashed their ECU? Did it make a noticeable improvement in throttle response? Which tune did you settle on?

• Evomsit
• VRTuned
• Softronic
• GIAC
• ECU Tuning Group
• Other

joe-1972

I was suggested to go with VR Tuned... from what my car did on her base line run recently I am inclined to do so in the future...

http://www.vrtuned.com/shop/ecu-tuni...meoek5r2crn294
Comes in a nice little kit to use... $700

Slopeslider

Joe can you elaborate?

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Hardback

Good question, no recent feedback on ecu tunes. Considering you have fabspeed components why not ask them who should tune. Not happy
with low rpm response below4k is typical of our flat 6 engines, above is where magic happens. My 200 cel cats have made me add a little more throttle leaving in 1st but after that no issue. Not sure how far you want to go to have tq in lower rpm but regearing will do it.

Flat6 Innovations

Have you performed a handover since these items were installed? The adaptive needs to be cleared after these items are changed.

That said, don't settle for a generic tune. I see nothing but problems for these, as the "tuners" generally don't understand how an engine even works.

Find someone local with a chassis dyno, that can do live tuning, not generic file sending, hoping the changes will optimize your engine. I am dealing with one of these problem children now, and I've been working on the tune for a week, and still can't nail it.

Slopeslider

Jake I did disconnect the battery for about an hour to reset the ECU to facilitate adaptation to the new cats. I'll certainly look into having a dyno live tunning. I'm in Savannah. Do you have any recommendations?

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Flat6 Innovations

Disconnecting for an hour won't do it..find someone with an Autologic or PIWIS.

Or do a hard reset, which I don't prefer as much.

I don't know of any live tuners in savannah, but someone has to have the capability.

Torontoworker

Whats a hard reset?

alpine003

I'm gonna offer up my $.02 and say Softronic. They've been in the business one of the longest, has great communication/support, it's DIY at the comfort of your home withouth having to remove and ship ecu, you can return it to stock map whenever you want, you can run basic version of Durametric off their cable, and most importantly, a lot of race cars(aka Pirelli cup, Grand Am, SCCA, etc) run their tune and they are always working closely with teams to further R&D.

Btw, I'm in no way affiliated with them.

gnat

I would suggest looking into them closely before giving them your money. I haven't used them so have no direct knowledge, but I did some research awhile back when I got into it with them on another board about a piggyback solution they are reselling for a different car. There seem to be more than a few unhappy customers and they (VR) don't seem to take kindly to having their products questioned.

Personally I prefer to work with people that are willing to take the time explain their product (sans the proprietary details of course) and my limited interaction with VR and research on them doesn't indicate they are someone I'd like doing business with.

YMMV though so all I'm suggesting is that you make sure you are well informed first.

alpine003

Vivid Racing's latest joint partnership/venture was with Softronics to launch their "VR tuned" series. That has since ended for one reason or another. I won't speculate but can guess it wasn't on favorable terms.

So basically what you are probably getting with VR tuned are the Softronics maps without the Softronics support in case you decide to change something in the future.

You can formulate your own conclusions from there...

joe-1972

Joe can you elaborate?


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I had a baseline pull done on my car to see what she was doing and was mildly surprised... I have an air intake system, headers, no cats crossover pipes, and B&B mufflers. She put down 303 hp to the ground and I can't remember the torque number. She was dropping off early on the power... someplace around 6500/6750 but pulled strong overall.
It was plain to see on the graph that she could use some more "umph in the midrange and some more fuel in the upper revs.
She would defined benefit for a little cpu magic!
I will try to scan the dyno sheet tomorrow at work and post it for you.

FLY996

I'm using the Revo tune but I agree with Jake...find a local P-Car specialist and work with what they can dyno tune for you.

Tbred911

FVD has what you need. They only do Porsches. I'm having a modified file sent to me given my existing list of mods and am doing runs on a dynapack chassis dyno and sharing these results with FVD so they can look at AF ratio and power number for further tweaks if required.

Tbred911

303 WHP is amazing. 3.4 or 3.6. Is this with a tune?