Atlanta Club Lounge

[HufferSS]

Originally Posted by DarkFox1

So.. if I do a cam I have to do a stall.. any of yall done that?

I don't want to feel like i'm driving through sand.. or start getting 14mpg. (I already feel like I'm driving through sand.. but I don't want to rev it to 2800 rpm just to start rolling.. that's absurd.)

never driven a stalled car before unfortunately. Videos of it on youtube look... painful.

Changing the cam does not require changing the converter. It depends greatly on what you put in for a cam...milder ones work fine with a stock stall.

Stalls don't work like you describe...a 4k stall does not have to rev to 4k in order to start moving....the 4k rpm is the flash rating of the converter. It's complicated but just know that 3k to even 3500 stalls are very streetable and after a few weeks you won't even notice them...it will feel normal.

[DarkFox1]

Originally Posted by Southern Comfort

Hey DarkFox1,

I would be shocked if "any" worthy performance cam swap maintains or increases mpg. Maybe if you radically changed your driving style you could improve mileage over today's cam. Think about what performance cam does. It opens bigger, longer or both. Result is more air into the cylinder and more air requires more gasoline. There goes your mpg.

Loosen up the converter and less mpg follows.

There a couple of different ways to get into the 12s. Improve drive train/traction or build more power. Otherwise a lot of weight has to go.
Padre suggested a couple of things that dont require heavy engine mods, CAI, gear, tires.
I know they are not as sexy as a thumping cam or FI, but they will get the job done and without killing mpg.

I don't really understand how this car can be getting such poor mileage as it is..

my 4th gen got 20 with me ragging on it.

this car being as gentle as somone like me can be? 17.

The difference? well the 4th gen had highway gears (2.73 gu2) and a 4 speed auto.. this car has.. ??? gears and a 6 speed auto.

weight is a factor too I'm sure, but this thing has like 400 tings to improve fuel economy.. 6 gears, PROBABLY a ~3.07 rearend, VVT, AFM.. is GM moving backward?

I think I may be able to get SOME fuel economy back by getting rid of the nannies tbh.. I'm not used to them, and my foot won't accept them. As soon as AFM comes on I rev out of it.. the constant accelerate/coast nature of my driving is probably hurting it.

with Torque management and AFM my truck got 14.8mpg. Without TM and lightened up AFM my truck gets 16.

I want to change the power. The L99 makes what like ~310whp stock? Gotta do better than that.

[Southern Comfort]

Originally Posted by DarkFox1

I don't really understand how this car can be getting such poor mileage as it is..

my 4th gen got 20 with me ragging on it.

this car being as gentle as somone like me can be? 17.

The difference? well the 4th gen had highway gears (2.73 gu2) and a 4 speed auto.. this car has.. ??? gears and a 6 speed auto.

weight is a factor too I'm sure, but this thing has like 400 tings to improve fuel economy.. 6 gears, PROBABLY a ~3.07 rearend, VVT, AFM.. is GM moving backward?

I think I may be able to get SOME fuel economy back by getting rid of the nannies tbh.. I'm not used to them, and my foot won't accept them. As soon as AFM comes on I rev out of it.. the constant accelerate/coast nature of my driving is probably hurting it.

with Torque management and AFM my truck got 14.8mpg. Without TM and lightened up AFM my truck gets 16.

I want to change the power. The L99 makes what like ~310whp stock? Gotta do better than that.

AFM - I have no experience with this - mine was tuned out before I got the car. So does it activate when you drive around in Sport mode?
L99 ships with something like a 3.27 gear. Check our Wiki to confirm.
How are you measuring mileage to compare these cars' mpg?

[4SFEDSS]

I have a 3400 stall and drive it everyday. The first couple days
it felt weird but I don't even notice it know. This MPG you speak
of I know nothing about. I use MPT (mile per tank), which is about
150.

[JLE58]

Originally Posted by 4SFEDSS

I have a 3400 stall and drive it everyday. The first couple days
it felt weird but I don't even notice it know. This MPG you speak
of I know nothing about. I use MPT (mile per tank), which is about
150.

Correct a little larger stall like this you it will feel alittle different but you get used to it rather fast and dont even notice it.

[Southern Comfort]

Originally Posted by JLE58

Correct a little larger stall like this you it will feel alittle different but you get used to it rather fast and dont even notice it.

I suppose if these lockup then it would support better hwy mileage.

[DarkFox1]

Originally Posted by 4SFEDSS

I have a 3400 stall and drive it everyday. The first couple days
it felt weird but I don't even notice it know. This MPG you speak
of I know nothing about. I use MPT (mile per tank), which is about
150.

if I only get 150 miles a tank I'll be filling up every 2 days. I got my car 4/18 with 25 miles on it. It's now 5/10 and I have over 3100.

I calculated mileage on the 4th gen by the gallons used/miles per tank. I calculate mileage on this car with the car's fuel economy tab in the info center.

10 gallons used to get me 200 miles in the 4th gen. In this car it takes 13-16 gallons to get 200 miles.

AFM seems to come on when the car thinks you're at a consistent speed. The problem is with the nuances of the road, as soon as it kicks in you lose sufficient power to maintain speed, and have to accelrate, making it turn right back off. It seems to come on most often at slower speeds, that's when it's the most noticable anyway. I don't know if it comes on other times, but you can watch the HUD and as soon as it kicks in I drop3-5mph and it's a real struggle to get them back.

[JLE58]

Correct lock up is nice and all these converters are lock up to me lock up is better than over drive as far as street driving. On a l99 a converter and tires are going to be the best bang for the buck for a car that's going to see the track. A good converter, tires, bolt on's and a little nitrous and you have a good 11 sec camaro for just a little money.

[DarkFox1]

Wow.. looking at the Fbody gathering website.. $44 to register your car.. I thought it was cheaper than that. (actually, they've stopped registration at this point.. so $50 at the "gate.")

[CamaroKid300]

Originally Posted by DarkFox1

Wow.. looking at the Fbody gathering website.. $44 to register your car.. I thought it was cheaper than that. (actually, they've stopped registration at this point.. so $50 at the "gate.")

yep.

[ken53007]

thats only if you want to park with us and enter the car show...you can still hand out with us just wont be able to enter the show

[ken53007]

might want to look at procharger to man see what chris will install and tune

[DarkFox1]

was looking at other people's numbers. People are squeezing big cams into these L99s and doing Ls3 conversions and still barely topping the 400whp range, and NOT topping 400wtq.

http://**************************-cama...ers-video.html

boost seems to be the only way to beat these motors into producing some tangible power.

Still not sold on the turbo kit. It's pricey, and frankly the location of the turbo concerns me for a daily driver all-weather car like mine is. Unless there's ice on the roads I'm takin it. Flooding.. snowing.. my car is the ups man of vehicles... and I think the turbo's location is a little concerning for that, and a number of other reasons.

Was looking at the TVS2300 stage 1. about $6500 plus install (probably $2k to install..).. a heavy pill to swallow since it has to be done all at once, but n/a these motors can't seem to do it without sacrificing something.

[ken53007]

Originally Posted by DarkFox1

was looking at other people's numbers. People are squeezing big cams into these L99s and doing Ls3 conversions and still barely topping the 400whp range, and NOT topping 400wtq.

http://**************************-cama...ers-video.html

boost seems to be the only way to beat these motors into producing some tangible power.

Still not sold on the turbo kit. It's pricey, and frankly the location of the turbo concerns me for a daily driver all-weather car like mine is. Unless there's ice on the roads I'm takin it. Flooding.. snowing.. my car is the ups man of vehicles... and I think the turbo's location is a little concerning for that, and a number of other reasons.

Was looking at the TVS2300 stage 1. about $6500 plus install (probably $2k to install..).. a heavy pill to swallow since it has to be done all at once, but n/a these motors can't seem to do it without sacrificing something.

The procharger should be cheaper than the turbo kit