For those of you with 430+rwhp . . .
04-28-2011, 10:55 PM
#21
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I can get 20 mpg on highway trips but most of my driving is more city type (too much traffic and too many red lights). When I hit the highway, it's only for a couple miles and not with a light foot. I average around 12 mpg now, compared to the 17 I think I was getting when the car was stock.
04-28-2011, 11:28 PM
#22
I can get 20 mpg on highway trips but most of my driving is more city type (too much traffic and too many red lights). When I hit the highway, it's only for a couple miles and not with a light foot. I average around 12 mpg now, compared to the 17 I think I was getting when the car was stock.
Ps. Whisler, love the truck.
04-29-2011, 11:50 AM
#33
I get about 18mpg mixed now with a good dose of highway mixed in with 10mph traffic. So if I could get that type of power and have about the same mpg, I'd be a happy camper. Given the weight of the car, it wont be nearly as fun as our lighter vehicles, but should satisfy my DD needs.
04-29-2011, 07:48 PM
#38
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I can get 20 mpg on highway trips but most of my driving is more city type (too much traffic and too many red lights). When I hit the highway, it's only for a couple miles and not with a light foot. I average around 12 mpg now, compared to the 17 I think I was getting when the car was stock.
04-29-2011, 08:05 PM
#39
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I made 505 rwhp and 426 ftlbs. I designed my own cam and ported a set of
heads. With a victor jr. Manifold. I get 14.5 city and
23-25 hwy. Stock bottom end with a nine inch in the car
heads. With a victor jr. Manifold. I get 14.5 city and
23-25 hwy. Stock bottom end with a nine inch in the car
04-30-2011, 11:00 AM
#40
One issue with a turbo is lack of under hood space. It can be done, but depending on the installer's skill/knowledge level (and funding), reliable results can be elusive. There have been a couple of really good examples of butchery on here.
IMHO, a ProCharger should have the same sort of results without the exhaust plumbing hassles. There are some excellent examples of installations on here and the "other" forum.
Economy is better with a turbo or a centrifugal blower.
There's more than a single reason, though, that folks (and the factories like GM, Ford, etc.) choose the positive displacement superchargers as the boost delivery method.
A (very) mildly-cammed LS7 will do the trick. Mine is making a touch under 505 rwhp and 491 rwtq, but more importantly, it makes 380 lbs/ft at ~1800, which produces bigger grins at lesser TPS readings.
Most recent mileage on a 220 mile trip with about 180 of it being highway (cruise) miles and the rest being in heavy traffic, was 20.47. Longer trips with more cruise miles usually yield just over 22 mpg. These are calculated figures, not DIC readings.
Of course, a few trips through the gears under heavy throttle reduce these figures by about 22-25%.
Remembering back (more than a few years) when I was a GM service tech, the Z28 302 Camaro had a close to 1 hp/cu. in. (advertised), but in street trim and similarly equipped, in the average situation, a 327/275 or 350/295 was it's equal. On the track, it could be a different story. But how often are you on the track?
To get to your hp goals in a smaller cube motor, you will have to make some sacrifices, but as with any combo, a good tune can help to somewhat offset the negative effects of the mods.
IMHO, a ProCharger should have the same sort of results without the exhaust plumbing hassles. There are some excellent examples of installations on here and the "other" forum.
Economy is better with a turbo or a centrifugal blower.
There's more than a single reason, though, that folks (and the factories like GM, Ford, etc.) choose the positive displacement superchargers as the boost delivery method.
Most recent mileage on a 220 mile trip with about 180 of it being highway (cruise) miles and the rest being in heavy traffic, was 20.47. Longer trips with more cruise miles usually yield just over 22 mpg. These are calculated figures, not DIC readings.
Of course, a few trips through the gears under heavy throttle reduce these figures by about 22-25%.
Remembering back (more than a few years) when I was a GM service tech, the Z28 302 Camaro had a close to 1 hp/cu. in. (advertised), but in street trim and similarly equipped, in the average situation, a 327/275 or 350/295 was it's equal. On the track, it could be a different story. But how often are you on the track?
To get to your hp goals in a smaller cube motor, you will have to make some sacrifices, but as with any combo, a good tune can help to somewhat offset the negative effects of the mods.