MasterBoondocker
nw lower Meeeechigan, TN and FL
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Joined: 10/11/2003
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My concern for me and a Bud is for a Mopar cam ... but the grind specs for a Chevy or Ford should be about the same.
My concern is lower rpm torque and fuel econ ..... what specs have you used and had success with ? .... who would be a good cam grinder to contact ?
There are a couple of cams on-line with specs like the following.......
Valve lift ... 420/443, duration @ 050 ... 204/214, overlap .... 112.
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JohnnyT
Goshen New York
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Joined: 07/15/2003
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Moved from class A forum
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northshore
northshore
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Joined: 02/23/2004
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just as an idea, check out Edlebrock they used to make a whole system for motors, heads, intake manifold, carb/Inj, cam, lifters the whole works, you pick the items to accomplish what you want, ie low end power/torg economy etc. I am pretty sure they make them for small and big block mopar,gm,and ford.
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bill h
el segundo
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Joined: 08/02/2001
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MasterBoondocker wrote:My concern for me and a Bud is for a Mopar cam ... but the grind specs for a Chevy or Ford should be about the same.
My concern is lower rpm torque and fuel econ ..... what specs have you used and had success with ? .... who would be a good cam grinder to contact ?
There are a couple of cams on-line with specs like the following.......
Valve lift ... 420/443, duration @ 050 ... 204/214, overlap .... 112.
The 204/214 you mention is pretty good. I have used it in several engines for towing in BB Chevs and Olds with great satisfaction. Presently using 204/209 roller in a 502 with a torque curve that is almost too flat to call it a curve. Peak torque is at 2800 RPM, pretty much where I drive.
Bill and Susan
84 Barth 30 tag powered by ht502/Thorley, Gear Vendors OD
Siamese Calvin and Airedale Hobbes
4WD Toyota toad
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sum1
So-Cal
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Joined: 11/07/2005
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I'm not too keen on the lift numbers any more, but when I was, I remember giving the cam about 2° of advance to get LOTS of out of the ground grunt. Unfortunately it was murder on gas milage.
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MasterBoondocker
nw lower Meeeechigan, TN and FL
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Joined: 10/11/2003
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THX Guys ...
ns .... You have had experience with Eddy ? ... the little recent contact I have had has not been "good". The specifics are this ... I contacted them on both the SP2P and Streetmaster intakes to get some "tech" on those. They said they didn't know anything and what little they "said" was that the two intakes were outdated and "junk". They said to consider the Performer. BUTTT .. the Performer is nothing more than a alum version of a stock intake manifold.
The Streetmaster and SP2P is a whole different style of intake ....... specifically done-up to enhance/increase fuel econ back in the mid-late 70's.
My opinion of all this ? .... very VERY bad customer service. OK ...I can see them not wanting to REtool-up for a motor that has not been put in a production vehicle in 30 years(Mopar Big-Block)... but tell-me the proper intake to use - even it means buying a used one. Their cams? .... are for fuel-econ ?? ... I thought their packages were for street/strip applications.
bh - on that cam ...what diff have you seen from the OEM one to that one?
s1 - have you tried and tested running the cam straight-up and with that 2 degree advance? How much did it "murder" the mpg?
BTW .... I did not go out today and just filled UP my daily-driver yesterday ....
It was just announced on the news that fuel prices went UP 30 cents per gallon late this afternoon !!
Bottom line ... on this Class A build-up .... max fuel econ is a major concern.
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bill h
el segundo
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MasterBoondocker wrote:THX Guys ...
bh - on that cam ...what diff have you seen from the OEM one to that one?
Bottom line ... on this Class A build-up .... max fuel econ is a major concern.
After putting a 204/214 and a Performer in an Olds tow car, I climbed Chiriaco Summit way faster than before pulling the same boat. Don't have the figures memorized, but it was a stunning improvement. The towing mileage was about the same, maybe not as good. The mileage loss is likely due to my use of the increased performance. If I were looking for better mileage, I would look at a cam with 195/205 or so.
With a heavy load, you are not going to see much mileage improvement. Buy a vacuum gage and stay as high as you can.
Forget the SP2P. It was a gimmick. The Streetmaster was a decent manifold for low rpm use.
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Jim83Itasca
La Quinta Calif
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Joined: 09/16/2003
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Bill, The 195/205 is what the "Stock 454" has in it now.....
I would use the Lunati cam at 204/213 @0.50 cuz those "Voodoo cams" are nice.
Jim
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sum1
So-Cal
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MasterBoondocker wrote:s1 - have you tried and tested running the cam straight-up and with that 2 degree advance? How much did it "murder" the mpg? Yes, but my short term comparisons were for grunt and not for milage. Unfortunately, I have no hard numbers to share but I remember an obvious difference. I will say, however, that that 4X PU pulled the front wheels off the ground at each shift and could easily drag other trucks up and out of deep holes.
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timmac
Las Vegas
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Joined: 03/20/2006
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A fuel inject system would give you the best MPG increase, different cams and performance manifolds on heavy RV's wont do much for MPG increase, but will increase torque, most stock cams and manifolds are good for fuel MPG and average HP/Torque..
Put your $$$$$ into a fuel inject system over the cam/manifold, a good exhaust system will be great also..
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