Re: 383 build for daily driver. Power/fuel mileage
[Re: HYPER8oSoNic]
#1025462
07/04/11 10:15 AM
07/04/11 10:15 AM
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Joined: Jan 2003
Posts: 28,067 Irving, TX
feets
Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,067
Irving, TX
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A 528 solid cam is not going to be very street friendly in a pump gas 383. It surely won't get decent mileage. Talk to the cam grinders. They can come up with a better and more modern grind than that old MP stick.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: 383 build for daily driver. Power/fuel mileage
[Re: Mr.Yuck]
#1025463
07/04/11 01:27 PM
07/04/11 01:27 PM
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Joined: Mar 2003
Posts: 4,924 Tri-Cities, Washington
VITC_GTX
OP
master
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OP
master
Joined: Mar 2003
Posts: 4,924
Tri-Cities, Washington
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I have to say that I am confused. I never would have thought a solid cam with that much lift and duration would work well at all for my needs. I have a 284/484 cam in my 440 and it has no vacuum and a very choppy idle and poor fuel mileage. I guess I just don't understand cams well enough... I was thinking something a little less money on the pistons as well. Any others have cam/piston suggestions?
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Re: 383 build for daily driver. Power/fuel mileage
[Re: VITC_GTX]
#1025464
07/04/11 01:38 PM
07/04/11 01:38 PM
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Joined: Nov 2008
Posts: 1,565 tennessee
pushbutton
pro stock
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pro stock
Joined: Nov 2008
Posts: 1,565
tennessee
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Quote:
I have to say that I am confused. I never would have thought a solid cam with that much lift and duration would work well at all for my needs. I have a 284/484 cam in my 440 and it has no vacuum and a very choppy idle and poor fuel mileage. I guess I just don't understand cams well enough...
I was thinking something a little less money on the pistons as well.
Comp XE-268
Any others have cam/piston suggestions?
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Re: 383 build for daily driver. Power/fuel mileage
[Re: VITC_GTX]
#1025466
07/04/11 01:58 PM
07/04/11 01:58 PM
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Joined: Nov 2004
Posts: 843 Suffolk,VA
ireland383
super stock
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super stock
Joined: Nov 2004
Posts: 843
Suffolk,VA
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Quote:
Looking to rebuild the 383 for my ’71 SSP. I want this car to be a daily driver with A/C so pump gas, good vacuum and decent fuel mileage is a must (I know not to expect much on fuel mileage but I would like to get 15+ mph if possible). In fact, I don’t want too much horsepower (is that possible?) because if I have it I will want to use it!!! Heads will be stock 906's.
Thinking of a stock-ish engine build but was hoping to take advantage of newer technology. What do you suggest for a decent build (pistons, cam, carb & manifold)?
If your running HP manifolds you might run the Comps 275DEH like i'm using 235/482 it pulls 12" of vacuum at idle with power brakes. Use the KB400 pistons, mill the heads .030 to get you around 84cc. Maybe a 670 street avenger carb (i'm using a 3310 750), you should be pretty happy and still get decent mileage if you keep your foot out of it . I'm running 3.91's now, you might want to use 3.55's or less for mileage.
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Re: 383 build for daily driver. Power/fuel mileage
[Re: ireland383]
#1025467
07/04/11 02:11 PM
07/04/11 02:11 PM
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Joined: Oct 2005
Posts: 1,305 Lakewood, Colorado
herkamer
pro stock
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pro stock
Joined: Oct 2005
Posts: 1,305
Lakewood, Colorado
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Fuel economy = short duration, low lift cam and small carburetor. I have a Crower 267/271 cam in my 383 which is close to the stock 4 bbl cam which is good for performance but not for economy. Look at their Baja Beast or maybe the Mileage Compu-pro cam. 250ish duration (200 at .050),.420ish lift and 112 centerline. I would go with a 500 cfm 4bbl for the ultimate in mileage. When gas wasn't garbage, a friend of mine could get 20 mpg highway out of a 440 with that combination.
Matt 69 Dart Swinger 340 83 W350, Megasquirted with 46RH Old news: 72 Demon street/race mobile Latest: 70 Duster backhalf car and even more
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Re: 383 build for daily driver. Power/fuel mileage
[Re: herkamer]
#1025469
07/04/11 03:13 PM
07/04/11 03:13 PM
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Joined: Nov 2006
Posts: 1,456 oklahoma
forphorty
pro stock
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pro stock
Joined: Nov 2006
Posts: 1,456
oklahoma
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Quote:
Fuel economy = short duration, low lift cam and small carburetor. I have a Crower 267/271 cam in my 383 which is close to the stock 4 bbl cam which is good for performance but not for economy. Look at their Baja Beast or maybe the Mileage Compu-pro cam. 250ish duration (200 at .050),.420ish lift and 112 centerline. I would go with a 500 cfm 4bbl for the ultimate in mileage. When gas wasn't garbage, a friend of mine could get 20 mpg highway out of a 440 with that combination.
If fuel economy is more important than performance, this sounds like very good advice. Probably have very nice low end response too.
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Re: 383 build for daily driver. Power/fuel mileage
[Re: VITC_GTX]
#1025470
07/04/11 09:26 PM
07/04/11 09:26 PM
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Joined: Jan 2003
Posts: 24,562 Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
I have to say that I am confused. I never would have thought a solid cam with that much lift and duration would work well at all for my needs. I have a 284/484 cam in my 440 and it has no vacuum and a very choppy idle and poor fuel mileage. I guess I just don't understand cams well enough...
I was thinking something a little less money on the pistons as well.
Any others have cam/piston suggestions?
284/484 cam is awful for anything but racing. The 528 solid is way more mild. Solid doesn't = Race. I'd think a well tuned 383 w/ a 528 solid with Mani's or headers and 3.23's would get at least 16 probaly more... That said If mpg's is what you are after I'd call a cam guy and have a cam made for your application
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