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Better? Camshaft for a Fuel Inj. 300 six

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BIG 6 farmer
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Better? Camshaft for a Fuel Inj. 300 six

Post #1 by BIG 6 farmer » Mon Mar 04, 2013 12:30 am

I know this has been hashed over before. Im looking @ 150 Econolines to hit the road with. Got to go have some fun. Got my eye on an 88, or a 91. Both low mile 300 sixes. One has an Auto trans, the other a stick (5 speed?) Both bare bones. Plan to pull a small Camper, or Motorcycle Trailer. Of course i plan to mess with it, do up grades for maximum Torque & Fuel mileage. Exhaust upgrades, slight aero improvements. My ? is, would a Camshaft change be worth it for these gains? What are the proven favorites ? :thumbup: OR would just advancing the Cam Gear, with the Stock Cam give me most of what i ask ? :hmmm:
83 F 150 SB 4x4 300 six NP 4speed - - 1950 IHC L162 (1&1/2 ton?) - 87 & 88 T-Bird Turbo Coupes - 2000 Triumph Tiger , 76 Honda GL 1000 , & other toys and parts (& junk) -

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80broncoman
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Re: Better? Camshaft for a Fuel Inj. 300 six

Post #2 by 80broncoman » Mon Mar 04, 2013 5:47 pm

BIG 6 farmer wrote:I know this has been hashed over before. Im looking @ 150 Econolines to hit the road with. Got to go have some fun. Got my eye on an 88, or a 91. Both low mile 300 sixes. One has an Auto trans, the other a stick (5 speed?) Both bare bones. Plan to pull a small Camper, or Motorcycle Trailer. Of course i plan to mess with it, do up grades for maximum Torque & Fuel mileage. Exhaust upgrades, slight aero improvements. My ? is, would a Camshaft change be worth it for these gains? What are the proven favorites ? :thumbup: OR would just advancing the Cam Gear, with the Stock Cam give me most of what i ask ? :hmmm:


If you just happen to have the engine apart then yes, I might go for a different cam. If Not I leave the stock one in there.
If you go to higher ratio rocker I HIGHLY reccomend you change out the fibre OEM timing gear set for metal gears.

Now At what specific RPM(or RPM range) are you wanting to see either a Perfomance OR MPG increase?
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80 bronco FUV (farm utility vehicle)300 T-18 3.50s EFI head, offy C dual plenum, 500 edel carb, 1.7 roller rockers, Crane 260 cam EFI Exh

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Re: Better? Camshaft for a Fuel Inj. 300 six

Post #3 by 82F100 » Mon Mar 04, 2013 7:28 pm

Just saw that Comp Cams has a Xtreme Energy EFI cam it is listed in the sbf section of their catalog.It had caugjt my eye while checking on a cam.Though they are listed for the bent 8 boys only I have the 262 in the motor for my pinto and I thinkbthe 268 made 1 hp per cu. In. In a 200 using mikes aluminum head.
300's make good truck motors....not race motors

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Re: Better? Camshaft for a Fuel Inj. 300 six

Post #4 by StrangeRanger » Mon Mar 04, 2013 7:51 pm

Except that he ants better midrange and an increase in fuel economy not more HP.

Take a look at Crower 19211. Then compare it to a stock cam with 1.75: Ch**y rockers. There's precious little difference.

As to the phenolic timing gear, you can change it now or you can change it later but if you go to a cam with higher lift at the valve and therefore higher spring pressures you WILL have to change it and sooner rather than later. Best to do one teardown instead of two.
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82F100
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Re: Better? Camshaft for a Fuel Inj. 300 six

Post #5 by 82F100 » Tue Mar 05, 2013 12:23 am

Strange, I understand that, the lower duration cams are for torgue and throttle response.
here's the extreme energy 250 cam
http://www.jegs.com/i/Comp-Cams/249/31- ... oreDetails
300's make good truck motors....not race motors

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THE FRENCHTOWN FLYER
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Re: Better? Camshaft for a Fuel Inj. 300 six

Post #6 by THE FRENCHTOWN FLYER » Tue Mar 05, 2013 1:40 pm

StrangeRanger wrote:Take a look at Crower 19211. Then compare it to a stock cam with 1.75: Ch**y rockers. There's precious little difference.



That is correct. The Crower cam adds roughly .050 lift to the stock lift while keeping the opening and closing events the same. I built a 240 with one of these cams and it runs great. It was accidentally over-revved past 6000 once with no damage, using the recommended Crower spring set.

A stock cam with 10% more lift from the Chevy rocked arms (1.61 vs 1.75) does essentially the same thing.
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Re: Better? Camshaft for a Fuel Inj. 300 six

Post #7 by BIG 6 farmer » Wed Mar 06, 2013 7:56 pm

Thanks Guys ! So nice to mix it up with like minded Gents. One Econoline has 34,000 mi. The other 78,000? Dont want to wrench much on Van (at first). Kinda leaning to just an Alum. Gear set, advanced a bit. Lookin for the sweet spot to be @ 1500- 2500? rpm. I do like my Elgin Cam (like an Isky Mile-a-more) in my Truck. Helped my Buddy with his 93 Blazer 350 Engine. Did some grinding on the swirl port heads, (during overhaul). Put a Comp. Cams Extreme Energy? 252? Dur., and a spacer under the TBI. All stock other wise. Thing feels like a 400 sbc. pulls nice from idle to 4000. Find the short Dur. Camshafts to be a very good fit in a Truck. Have noticed they tend to be a bit noisier. Told my Buddy with the Chevy, his valves are noisier cause they are working faster. (very slight noise) That was the trade off for the better torque. :D
83 F 150 SB 4x4 300 six NP 4speed - - 1950 IHC L162 (1&1/2 ton?) - 87 & 88 T-Bird Turbo Coupes - 2000 Triumph Tiger , 76 Honda GL 1000 , & other toys and parts (& junk) -

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