rebuilding my 93 F-150 4x4, auto with 5.8, hydraulic cam engine 33in tires, 3:55 gears, adding headers, good exhaust with converter, cold air intake, maybe a computer upgrade if i can find one, and this is a speed density system. seems to be alot of contriversy on cam selection, i've narrowed it down to 2 cams but if any one has a better choice feel free to suggest. the most popular grind specs are as follows

<table summary="" cellpadding="1" cellspacing="1" border="1"><tbody><tr><td>Intake / Exhaust</td> <td>204/214</td> </tr> <tr> <td>*.050 Intake / Exhaust</td> <td>.448/.472</td> </tr> <tr> <td>Lobe Sep.</td> <td>112</td> </tr> <tr> <td>Firing Order</td> <td>351W
</td></tr></tbody></table>
i would like to run the following grind if it would work with little or no additional upgrades

Cam Lift (Int./Exh.):.295/.310
Valve Lift (Int./Exh.):.474/.498
.050" Duration (Int./Exh.): 214/224
C/L Angle: 112

i'm trying to get the largest cam that will work with a basicly stock engine, .020 over bored, stock speed density f/i system, truck is a daily driver, tows about 4000 lbs of lawn equipment and trailer 3 times a week and needs to pass emissions. i know if not sure a smaller grind is safer but i'm trying to get this at it best the first time. any help appreciated.

 

Well the lobe separation of 112 is not gonna make the SD system happy...

 

my mistake, the smaller cam has a 114 lobe separation, so i guess the lobe separation being higher is more important as long as the lift and duration is kept reasonable, would one of these grinds work better

Valve Lift (Int./Exh.):.474/.498
.050" Duration (Int./Exh.): 214/224
C/L Angle: 114

or

Valve Lift (Int./Exh.):.478/.485
.050" Duration (Int./Exh.): 214/224
C/L Angle: 114

their almost the same exept the lift

 

www.camcraftcams.com

Jones Cams

Bulet Cams

Forget the big cams companies… call one of these guys.

 

The engine will run with those cams but there's not a snowballs chance in hell it'll pass emissions.. you need a cam with 114LSA(not the same as centerline) and no more than 205 intake duration.

 

thanks for the info Conanski, thats what i needed to learn about, i'm old school, give my a carburetor engine with a simple distributor and no computer and i can make it sing, kinda dating myself here, finding out that computer control is a whole other animal. so would a grind like this work ok.

<table summary="" cellpadding="1" cellspacing="1" border="1"><tbody><tr><td>Intake / Exhaust *.050 </td> <td>204/214</td> </tr> <tr> <td>Intake / Exhaust</td> <td>.448/.472</td> </tr> <tr> <td>Lobe Sep.</td> <td>114</td></tr></tbody></table>
or should i reduce the duration a little more? it HAS to pass emissions unfortunately i'm in a county surrounded by counties with emission standards, the truck was passing very clean i might add with one cylinder at 60 lbs and so much blow by oil dripped from the air box, way past time for a rebuild.

 

Yeah that should work, FWIW my go-to cam for this motor is the Crane 444232 with 1.7 rockers, it produces a stock like idle which is what you need for emissions but also produces strong low rpm torque.

 

yea i found it, but forgot about 1.7 rockers. that will put its lift right where i'm looking for. i am finding it for around $230 for cam and lifters set does that sound about right, its twice the price of many but thats ok if it gives everything i'm looking for.

 

Unfortunately, you're in handcuffs on the cam (SD and emissions)...........your hard efforts regrettably won't yield the performance gains possible.....

..I personally put cams and headers way down on the list of things I invest in to build hp and torque.........

 

any gain in using a stock 92/93 302HO roller cam in the speed density f/i 351w, i have everything to make the change over except the distributor gear.

 

my current hyd flat tappet cam has these 3 numbers stamped on the end of it, 112237; 270628; 270528. any ideas of how to get the specs on this cam, these are the only numbers, stamped or cast that i can find.

 

Yes more intake lift and duration means it'll make more HP.

 

How much power will it add to a stock 1995 5.8 of you add the 1.7 rockers and the suggested cam? Is there another cam that will give it good drive ability and a little lope at idle?

 

Not a hugh amount because the heads, intake and exhaust are also holding it back but it'll be noticable.

No.. those things are mutually exclusive.

 

Right now it has true 2.5 duals but if I put gt40 heads on I'll prolly put a set of headers on too. This is also a speed density motor