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Discussion Starter #1
I'm going to have my V performance tuned using either LS2-edit or HP Tuners software, both of which have packages for the 4.4L supercharged Northstar engine. My local speed shop is familiar with both of these tuners but they focus mainly on Vettes and have never done a V. Therefore all of the performance parameters will have to be dyno-derived. Although this isn't a big problem, I'd feel better if we weren't starting the process from scratch.

Has anyone ever had their V performance tuned? Does anyone know of a reliable source for the maximized tuning parameters for a V? Once a standarized set of parameters is developed they can be electronically shared and easily uploaded to other V's at minimal cost. So this is something that can benefit all V owners.

As you may know, GM does a factory stock tuning that is very conservative. By maximizing a myriad of engine and transmission characteristics, the horsepower output at the rear wheels can be typically increased by 10%.

I've been to D3's website and quite frankly can't understand what it is that they do or are planning on selling. Their dyno readouts look more like they pertain to a base XLR rather than a V. But perhaps I'm not looking in the right place. Does anyone know specifically what they are planning on doing for the V in terms of performance tuning?

Chuck
 
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Bob here, what do you mean by tweaking, do you think you got more than 20 HP out of their setup, and how much did they charge? I bet it was a big number.
Lund Cadillac in Phoenix does performance tuning. I had given up on volant and had them do my intake and they 'tweaked' the EPM. I doubt they would give techincal detail to a private party but they might talk to your tuner.

http://www.lundcadillac.com/customcars.cfm
 

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Discussion Starter #4
A typical full-blown dyno performance tune costs about $500. It's based on the specific characteristics of your own car and covers probably 40 to 50 parameters on both the engine performance module (EPM) and and the vehicle performance module (VPM). If you purchase your own tuning software license (so, for example, you can reload the stock tune yourself before taking your car in for service and then reload back your performance tune afterwards) that's about another $500. For a grand you get 40-50 additional hp output, which is not bad considering the cost of other performance upgrades. A CAI, for example, might give you only 10-15 hp and that alone costs $500.

Jetboyphx - What did Lund do in terms of tuning upgrades? Did they dyno your car? Do you know which parameters they modified (e.g. air/fuel mixture, timing, transmission shift points, etc.)? Do you know what software they used?
 

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A typical full-blown dyno performance tune costs about $500. It's based on the specific characteristics of your own car and covers probably 40 to 50 parameters on both the engine performance module (EPM) and and the vehicle performance module (VPM). If you purchase your own tuning software license (so, for example, you can reload the stock tune yourself before taking your car in for service and then reload back your performance tune afterwards) that's about another $500. For a grand you get 40-50 additional hp output, which is not bad considering the cost of other performance upgrades. A CAI, for example, might give you only 10-15 hp and that alone costs $500.

Jetboyphx - What did Lund do in terms of tuning upgrades? Did they dyno your car? Do you know which parameters they modified (e.g. air/fuel mixture, timing, transmission shift points, etc.)? Do you know what software they used?
They have a map developed for this application with their exhaust. They don't dyno each car. They have three dealerships in the Phoenix area and if they have their own dyno it is at the old bodyshop for the south Scottsdale location but they may be using the dyno at Billy Boat's. The installed list on their airkit with the remap is $850 and easily negotiable. I did not ask the price for a unique dyno tune as I didn't want to tune it to a point where I had drivability issues. I know the air/fuel is modified and the shift points may be slightly modified but not drastically. With the airkit and their exhaust they state I should be at 26-30 hp over stock and it is a noticable difference.
 
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