E303 in a 351w - Ford Bronco Forum
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post #1 of 21 (permalink) Old 03-13-2017, 07:58 AM Thread Starter
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E303 in a 351w

I've had one in mine for a while and haven't been happy with it just looking for anyone's feedback on it .
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post #2 of 21 (permalink) Old 03-13-2017, 08:14 AM
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I know quite a few guys have used that cam..what specifically aren't you happy with?
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post #3 of 21 (permalink) Old 03-13-2017, 11:37 AM
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I ran that cam for about 10 years. I was happy with it, but it kinda sucked to tow with specially on hills.

But power, had lots of it.

What is it that you're unhappy with?
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post #4 of 21 (permalink) Old 03-13-2017, 03:17 PM
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I've put a few Ecam's in mustangs and like them. Seems there might would be a few better options for a 4wd and towing. What you unhappy with??

1989 Bronco project rig
1994 Mustang Cobra Pace Car #365 of 1000
1997 Mustang GT DD
2002 F-150 Crew Cab FX4 6" lift and 35's
1978 f-150 Ranger 2wd project demon
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post #5 of 21 (permalink) Old 03-13-2017, 04:55 PM Thread Starter
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I've had it in my lighting for about a year and just disappointed in the lack of low end and seems to be a pig gas mileage wise . I prolly shouldn't be disappointed I should have known it wouldn't have much down low . I used it since I wasn't reusing stock cam. I'm debating pulling the timing cover off and advancing it 2-4 degrees and seeing how that helped.
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post #6 of 21 (permalink) Old 03-13-2017, 08:23 PM
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Have you tried running it at 13 degrees before TDC?
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post #7 of 21 (permalink) Old 03-14-2017, 07:58 AM Thread Starter
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Yea and did not notice much difference. Wondering if any of you ran it in your broncos or f150's. like I said I am pondering pulling off timing covering and advancing it 4 degrees to bring back some low end. I need to be able to do some towing . I've also considered removing it for the stock ho mustang roller cam I was thinking that would work better for low end.
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post #8 of 21 (permalink) Old 03-15-2017, 08:12 AM Thread Starter
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Sackman what was the test of your combo? Did you install the e cam dot to dot or was it advanced at all? This thing also seems to just be a pig on gas, I ran a larger flat taller cam in my previous motor before it spun a bearing and it got way better fuel mileage I chalked it up to the e303 just being a poor choice
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post #9 of 21 (permalink) Old 03-15-2017, 12:15 PM
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Originally Posted by Bill88stang View Post
Sackman what was the test of your combo?
Bored .030
Heads shaved to 59cc's
Fully Balanced rotating assembly
3 inch full exhaust
Timed at 13 BTC

I believe I was pushing 300 HP, and at least 350 ft lbs of torque, however I never had it tested. I did 0-60 in 8 secs though

UHKBV_JcIjU
https://youtu.be/UHKBV_JcIjU

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Originally Posted by Bill88stang View Post
Did you install the e cam dot to dot or was it advanced at all?
Dot to dot

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Originally Posted by Bill88stang View Post
This thing also seems to just be a pig on gas, I ran a larger flat taller cam in my previous motor before it spun a bearing and it got way better fuel mileage I chalked it up to the e303 just being a poor choice
Yeah, they're all pigs lol, but we love to drive 'em!! I remember only checking the mileage one time. 250 mile trip towing a trailer full of wood. I got 12 MPG's and was happy with it.
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Last edited by sackman9975; 03-15-2017 at 09:45 PM.
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post #10 of 21 (permalink) Old 03-15-2017, 09:18 PM
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Originally Posted by sackman9975 View Post
Bored .030
Heads shaved to 59cc's
Fully Balanced rotating assembly
3 inch full exhaust
Timed at 13 BTC

I believe I was pushing 300 HP, and at least 350 ft lbs of torque, however I never had it tested. I did 0-60 in 8 secs though
Hey Sack, what were your gears and tire size for that run? Kinda impressive for a DD BKO.
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post #11 of 21 (permalink) Old 03-15-2017, 09:19 PM
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Hey Sack, what were your gears and tire size for that run? Kinda impressive for a DD BKO.
3.55 gears, 31x10.50 tires
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post #12 of 21 (permalink) Old 03-15-2017, 09:36 PM
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3.55 gears, 31x10.50 tires
Last question: Did you have to tune, or, was the MAF okay with the cam?

I just looked up the specs. 110* LSA for the E cam. Just wondering if the, stock, MAF can cope with something that close, or, not.

Thanks,
Eric
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post #13 of 21 (permalink) Old 03-15-2017, 09:40 PM
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Originally Posted by silver70 View Post
Last question: Did you have to tune, or, was the MAF okay with the cam?

I just looked up the specs. 110* LSA for the E cam. Just wondering if the, stock, MAF can cope with something that close, or, not.

Thanks,
Eric
Lol..... no tune.....no MAF either. Speed Density on my old 95. They said it wouldn't work......

That cam specs says only works with MAF, but I proved that wrong.

Question for you: is my video working that I posted? Showing on my phone "the plugin not supported"
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post #14 of 21 (permalink) Old 03-15-2017, 10:03 PM
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Originally Posted by sackman9975 View Post
Lol..... no tune.....no MAF either. Speed Density on my old 95. They said it wouldn't work......

That cam specs says only works with MAF, but I proved that wrong.

Question for you: is my video working that I posted? Showing on my phone "the plugin not supported"
Okay.... that just makes it friggin' cool. Seriously? SD?! That's a very dicey cam for SD. This new point begs another question: Any CEL's or codes? There's gotta be something. In all technical reasoning, your truck should run lean with that cam on stock SD fuel maps. I mean, it apparently doesn't, but..... how?

Also, yes, the video works fine for me. I enjoyed every second of it.
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post #15 of 21 (permalink) Old 03-15-2017, 10:10 PM
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Okay.... that just makes it friggin' cool. Seriously? SD?! That's a very dicey cam for SD. This new point begs another question: Any CEL's or codes? There's gotta be something. In all technical reasoning, your truck should run lean with that cam on stock SD fuel maps. I mean, it apparently doesn't, but..... how?

Also, yes, the video works fine for me. I enjoyed every second of it.
No CEL's or codes either
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post #16 of 21 (permalink) Old 03-19-2017, 11:08 AM Thread Starter
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Have a vid of it idling? You still currently run this cam? Stock converter too? What about injectors ?
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post #17 of 21 (permalink) Old 03-19-2017, 11:08 AM Thread Starter
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What's your compression also?
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post #18 of 21 (permalink) Old 03-19-2017, 11:36 AM
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Originally Posted by Bill88stang View Post
Have a vid of it idling? You still currently run this cam? Stock converter too? What about injectors ?
Video is link in my signature. See below

Sold the truck to guy at work. Stock converter, stock injecctors too.

Engine builder said compression was at 9.2 :1
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post #19 of 21 (permalink) Old 03-19-2017, 01:23 PM Thread Starter
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Can't believe it idled that well speed density wise I would never have luck like that. Haven't driven mine in almost 2 years since my e4od died in my 94 lightning. Been searching for a decent priced used one since .
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post #20 of 21 (permalink) Old 03-19-2017, 08:48 PM
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Can't believe it idled that well speed density wise I would never have luck like that. Haven't driven mine in almost 2 years since my e4od died in my 94 lightning. Been searching for a decent priced used one since .
I'm wondering if it's a roller 5.8L. The ramp rates on roller cams are more aggressive than flat tappet and could be responsible for developing enough vacuum to keep the MAP sensor happy. Just a theory.

Hey sackman, was that 351W a roller motor?
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