DOD Cam Swap (formerly known as Preliminary Feedback On New Era G8GT Cam in an LS4)
06-22-2010, 12:11 PM
#43
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let us know what kind of numbers it pulls. We're going to get that wideband on his car shortly, we'll be able to see what the deal is. I'm betting it's running lean, however I haven't had a chance to even look at the tune so who knows.
06-23-2010, 11:40 AM
#44
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The car is at the exhaust shop getting the cutout installed, and they are adjusting the crossover because that stupid noisy flex pipe is hitting the transmission. I'll shoot another exhaust vid with the cutout open when I get a chance.
Everyone has their own definition of what is streetable, but I think this cam is very streetable. I have plenty of torque at 1200 RPM to putz around parking lots, and by 1400-1500 RPM everything has calmed down. I'm still working on the DOD settings to get it to go into DOD as often as it used to, but it drives fine with 4 cylinders.
Here's the skinny on fuel injectors: The LS1/LS6 injectors are the tallest, and have a different connector. The LS3, LS4 and LS7 all have the "shortie" injectors and newer style connector. The LS2 (and I believe LSA, LS9, etc.) injectors have the same connector as our's, but are somewhere in between as far as size goes. So, I have two options:
1) Get LS2 injectors and an LS2 fuel rail, mod the alternator bracket some more, and unbend the fuel rail inlet to get the system to mate to my fuel line. These are probably just enough bigger than mine to keep me from burning my injectors up. I'm figuring about $100 plus a good bit of wrestling.
2) Get LS3 injectors, which will bolt right in. They flow about 42lbs/hr at WOT, which is bigger than I need but probably not too big. The LS3 makes about the same peak horsepower that I am hoping for from my combo, and it idles and drives fine. This will run me about $250 for a used set, $350 for a new set.
Final comment: Livernois Motorsports charges way too much for dyno time. Right off the bat, they want $750+ to do the tuning themselves! When I finally got him to tell me about dyno time, they quoted me $300-$500 if I do my own tuning! Insane...
Everyone has their own definition of what is streetable, but I think this cam is very streetable. I have plenty of torque at 1200 RPM to putz around parking lots, and by 1400-1500 RPM everything has calmed down. I'm still working on the DOD settings to get it to go into DOD as often as it used to, but it drives fine with 4 cylinders.
Here's the skinny on fuel injectors: The LS1/LS6 injectors are the tallest, and have a different connector. The LS3, LS4 and LS7 all have the "shortie" injectors and newer style connector. The LS2 (and I believe LSA, LS9, etc.) injectors have the same connector as our's, but are somewhere in between as far as size goes. So, I have two options:
1) Get LS2 injectors and an LS2 fuel rail, mod the alternator bracket some more, and unbend the fuel rail inlet to get the system to mate to my fuel line. These are probably just enough bigger than mine to keep me from burning my injectors up. I'm figuring about $100 plus a good bit of wrestling.
2) Get LS3 injectors, which will bolt right in. They flow about 42lbs/hr at WOT, which is bigger than I need but probably not too big. The LS3 makes about the same peak horsepower that I am hoping for from my combo, and it idles and drives fine. This will run me about $250 for a used set, $350 for a new set.
Final comment: Livernois Motorsports charges way too much for dyno time. Right off the bat, they want $750+ to do the tuning themselves! When I finally got him to tell me about dyno time, they quoted me $300-$500 if I do my own tuning! Insane...
06-23-2010, 03:45 PM
#45
Thank you
Regards,
Rick LeBlanc
Livernois Motorsports
06-23-2010, 04:07 PM
#46
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We are the busiest we've ever been and the dyno is currently 2-3 weeks out. As I look into the shop now, there are 34 cars (mostly 2010 Camaro, C5/C6 Vette, and G8's) having work performed that will have to be dyno tuned.
Thank you
Regards,
Rick LeBlanc
Livernois Motorsports
Thank you
Regards,
Rick LeBlanc
Livernois Motorsports
06-23-2010, 08:33 PM
#49
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For those who do their own tuning, I'll suggest using the Airboy road dyno spreadsheet. It provides results similar to a Mustang dyno (heart breaker to people who have Dynojet plots).
The theory behind this is that you log data during an acceleration run, enter specific data about your vehicle (frontal area, coefficient of drag, gear ratio, final drive ratio, tire size, weight) and about the weather (temperature, altitude) into a spreadsheet, and it spits out a dyno chart based on real world loading of the vehicle under on-road conditions.
For accuracy, you need a level road, and realistic weight information. As a tuning tool, the accuracy is not that important, as long as you use consistent data, you can see the effect that timing differences make on the torque and power curves.
I lost most of my logs when switching laptops, but here's a plot from a first gear run - WOT only from around 4,000, so not a complete plot. If I remember correctly, it was slightly uphill, before the magnaflow was installed. This plot is based on data from a 5.545 sec 0 to 60 run, so not too much of an uphill.
The theory behind this is that you log data during an acceleration run, enter specific data about your vehicle (frontal area, coefficient of drag, gear ratio, final drive ratio, tire size, weight) and about the weather (temperature, altitude) into a spreadsheet, and it spits out a dyno chart based on real world loading of the vehicle under on-road conditions.
For accuracy, you need a level road, and realistic weight information. As a tuning tool, the accuracy is not that important, as long as you use consistent data, you can see the effect that timing differences make on the torque and power curves.
I lost most of my logs when switching laptops, but here's a plot from a first gear run - WOT only from around 4,000, so not a complete plot. If I remember correctly, it was slightly uphill, before the magnaflow was installed. This plot is based on data from a 5.545 sec 0 to 60 run, so not too much of an uphill.
06-24-2010, 01:08 AM
#51
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dayum ans i thought it was kinda high around me.. speed inc quoted me 350 for a basic tune and a place called benchmark tunning quoted me 400 but they do all the tuning no matter how long it takes.
06-24-2010, 02:31 PM
#54
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lol 
06-24-2010, 11:02 PM
#57
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Just because someone charges more than someone else for a specialized service doesn't make it too much. You are paying for one of the best tuners in the country to tune your car, and to make certain its right.
It's sorta like price shopping a surgeon in my opinion. surgeon A is expensive, but does fantastic work and has an extremely high success rate (0 patient deaths/injuries in 5+ years) but he's more expensive than surgeon B who does pretty good work (2 patient deaths/injuries in 3 years). You know what I'm doing? saving up my money to go to the best surgeon... The tune is the #1 most important item on a car, yet its the thing people cheap out the most on and almost always go on pricing alone... I know, because I've been that guy...
06-24-2010, 11:10 PM
#59
I don't know how many of you have seen our facility, but you don't stay in business being the cheapest in the market. We have a 36,000 sq. ft. facility with 16 hoists, 2 chassis dynos, and engine dyno, full machine shop with multiple CNC's, Engine build facility, Head Flow/Development center, and retail showroom. It's expensive just to keep the lights on. We do a lot of product development and testing and this helps us to manufacture quality products. We sell shortblocks, rotating assemblies, and CNC heads to shops all over the world and private label for these shops. We even supply several of the vendors on this and various other sites with these products and most of the general public has no idea that they are buying "X" vendors heads or engine and they are actually produced by us.
Just a few photos...
Regards,
Rick LeBlanc
Livernois Motorsports
