e303 cam with 1.7 roller rockers on stock block and heads

mellemel · Dec 28, 2007

I have a 1991 mustang lx I bought that has 1.7 roller rockers in it. I want to put the e303 cam in it. I have heard that it will have piston to valve clearances. is this true. I want to put the biggest cam i can in it without changing the rockers. thanks

PUNISHER RACING · Dec 28, 2007

don't go much over .540 the 1.7's will add .034 of lift go from there

Rick James · Dec 28, 2007

I have the E-cam and scorpion 1.73 rockers and dont have any probs.Get a better cam tho becuse mine runs out of steam by 52-5300 rpm.

PUNISHER RACING · Dec 28, 2007

an E cam will pull to 6500 all day sounds like bad corresponding parts

5spd GT · Dec 28, 2007

The added lift is not an issue for piston to valve clearance.

If you are going to add 1.7:1 ratio rockers with the E cam, you need to invest in new springs, or you could have piston to valve clearance problems.

black50 · Dec 28, 2007

have E303 cam for-sale, installing anderson b-31 if your interested seems to be in good conditions min wear low miles can email you picks of the cam if interested, I had an e303 with x303 gt-40 heads Ford Racing 1.6 rockers with stock pistons didn't have any problems, that cam is only like a .498 lift good street cam, and some would argue a turbo cam as well, anyone with knowledge of replacing aftermarket Clutch Quardrant, with firewall adjuster.. any info would be a big help, being 6'4 I pulled the drivers seat out of I could fit under the dash and work comfortablely, I see the stock cable self adjuster connected to the clutch pedal, not understanding how this upr three quadrant hooks up, is disconnecting the cable from the clutch fork nessecary, or can I do it from the pedal to hook up the firewall adjuster?

Rick James · Dec 28, 2007

Punisher,Ford list the e-cam as a low to mid range cam,maybe your confused with the f -cam???????????Its carbed with a dual plane/650 dp and lightly ported and rebuilt iron gt-40s with anderson hi rev valve springs with 4-10 gears.

Fast63 · Dec 29, 2007

PUNISHER RACING said:
an E cam will pull to 6500 all day sounds like bad corresponding parts

ANY cam will pull 6500 all day.

That is achieved by having valvesprings that are overly stiff for the application. The E cam really does run out of steam by 52-5300. Even if it pulls 6500 all day, you would go faster shifting around 5500.

5spd GT · Dec 29, 2007

A camshaft's rpm capability is also determined by the intake tract, from the MAF to the cylinder heads.

Larger heads and above, will increase the rpm capability of the same camshaft over a combination with smaller top-end parts.

There is no one place where a camshaft will quit on all engines.

PUNISHER RACING · Dec 30, 2007

Nope, no confusion here!

montyd · Feb 11, 2008

the e 303 cam is good to run with stock set up? i'm going to get an intake also but dont know which one yet

Fast63 · Feb 12, 2008

montyd said:
the e 303 cam is good to run with stock set up? i'm going to get an intake also but dont know which one yet

I would just use the stock cam with stock heads and an aftermarket intake.

e303 cam with 1.7 roller rockers on stock block and heads

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