Where on the rpm curve Don? Each set up is unique -- I had an exhaust limited set up on mine, and the E cam was an absolute dog down low (which is where it lived on the street). When it was modeled for my custom, the model indicated we lost about 15 HP at peak, but gained 40-80 ft-lbs of torque from off idle to 3000 rpm. That was with a swap from an E to a custom that has very mild specs - kind of like a stocker on steroids.

So -- it's not as simple as asking 'how much will I lose'.....my car is a MUCH better all around performer and MUCH more fun to drive on the street with the cam swap.

 

I had ported E7s (flowed really well, better than ps), stock HO cam with 1.7s, cobra intake, 19 lb injectors, off road h, shorty headers made 273 rwhp/308rwtq. Went to Crower 15511 with 24s and made 278 rwhp/305rwtq. Then changed to longtubes and gained 8 rwtq with no change in hp. With GT40x heads you will probably lose more than 5 hp peak...who cares at 5400 rpms. I have a e303 on my AFR 165/331 combo with cats and it makes a lot of torque...360 rwtq peak at 3800....350 from 3300 to 4200. My other 302 combos peaked a couple hundred higher. I have 4.10s and end up at 2300 rpm cruising (.63 ratio in 5th) making 270 rwtq at 2500 rpm...21-23 mpg depending on traffic during my 50 mile commute. I was thinking about advancing the cam 4 degrees to try and pull that 270 on down to cruising rpm which is more like 240 now. I shift at less than 3000 in normal driving. I would still probably make the same peak rwhp with 4 deg advance.

 

was thinking about advancing the cam 4 degrees to try and pull that 270 on down to cruising rpm which is more like 240 now. I shift at less than 3000 in normal driving. I would still probably make the same peak rwhp with 4 deg advance.

I have the E-cam in my coupe,which I have set @ 4* advanced,with ported E-7's,ported stock upper/lower,equal shorties,AOD,and 3:73's(along with alot of other mods!).I have'nt gotten it on the dyno yet(I'm waiting till I put my GT-40's,and better intake on),but it has plenty of torque down low with that setting on the cam,and on the top end too(shifting manually at around 4500 at the most on the street).I can get into the throttle fairly heavy even at lower RPM's,and see the nose lift.

 

I'm interested in low end RPM , exclusively for the street. I'm thinking this would be an over all improvement though trying to quantify it. Ford rates this motor at 340 HP, unknown torque. My guess would be 10-15 peak HP loss in a range I'm seldom in, and a small increase in low end torque.

 

If you want low RPM torque, you'll probably get more out of the HO cam than the E. The E moves the torque peak upward somewhat. The HO cam isn't that hot under about 2500 rpm, when you hit that point you can definitely feel the cam "come on" to the power band. I've never driven an E cam car, but I've heard they "come on" somewhat later. If you really want gobs of low end torque, the Explorer cam is awesome but they run out of steam by 4800 or so. I run one in my car, works well in a 2 ton land yacht with an AOD.

 

Don - I suspect you'll see a significant improvement in bottom end with the switch. But if you don't want to guess at it -- have Buddy Rawls model the set up for you. Then you can KNOW what's going to happen, instead of having folks guess at it with you.

 

Don't be so coy, Michael. You know you enjoy the everyday guessing games here.


However, I agree.

 

I wonder where how low in the rpm band tmoss gets decent torque with the stock cam advanced 4 degrees?

 

What stall you running hardy?

 

Stock at the present time,but I'm getting a 24-2800 in the VERY near future!:rofl:

 

On all my dyno sheets from several head cam combos a couple things stand out.

1-longtubes make more torque in the usable range...2000 to 3000 rpm. At 2500 longtubes made about 20 more torque and it had a slope to it not flat like shorties.
2-stock w/1.7s, crower 15511, e303 all made about the same fairly crappy torque in that range with shorty headers...about 250 rwtq from 2000 to 2800.
3-my new 331 makes a little more torque at 2500 rpm but my friend's c6 stock vette makes peak hp at about 6000, 350 peak torque at 4000 and is still at 320 at 2000 rpm...no wonder he gets 30 mpg on highway. How do he do it man? variable cam timing? of course it is a 6 liter weighing 3150 lbs.

It's hard for me to remember that far back but I think my stock 93GT drove the best for a daily driver. Additional mods seem to always come with a slight headache whether it was noise, overheating, losing coolant, etc. Now after all the time and money I am almost satisfied....:rofl:

 

I bought an 88 5.0 HO with Gt40 heads flat top Pistons and an E303 cam in it to put in my truck but I had to put stock manifolds back on it and my stock EFI set up but with the Cam I can't hardly get it to do into gear with out it dying (automatic) it's mainly reverse that kills it but sometimes drive will also what could a person do to fix that I've been told bigger stall converter but I don't know how big

 

Glad you used the search button apparently, but no need to bring back a 14 y/o thread. I'd turn the idle screw on the throttle body for starters, and verify what your timing is at. If you're running this set up in a truck with a speed density system you might need to turn down the fuel pressure, or get a chip done.

 

Apr 25, 2008