Hydraulic Roller Camshaft

[Dwight]

I'm running a small block, but

the last time I made a lot of changes I called Keith and asked him what I needed.

I told him my Cobra was a street car but I did not want to be embarrassed at the street light by a Corvette.

I wanted hp but I needed a motor that would let me cruise at low rpms.

I bought the heads and cam from him. Ordered a few other parts from Summit.

It's the best motor I've every owned. Cruise at low rpm without a trailer hitch jerk. 402 rear wheel hp and 416 tq. All most as fast as a big block.

I love it.

So I strongly recommend that you call Keith Craft and discuss what you want in a motor / Cobra.

The Custom Comp cam was cheaper from KC that any other source. The Brodix heads are bad to the bone.

Dwight

[RodKnock]

Way too small for a 527, even way too small for a 482. Ask an expert like KC, but when shopping for my 482, a 23x/24x is/was a small cam with an LSA of 112. 24x/25x is/was a medium-sized cam and a 25x/26x would be a large cam. Again for a 482. With the 527 I would be tempted to go with the 25x/26x cam. My hydraulic roller, which has a duration of 245/252 and lift of .631/.650 seems just about spot on, maybe I could have gone a little bigger. A very docile cam.

Anything over .650 lift is big, IMHO. FWB's cam is big, but ask the FE experts. Not me.

[RestoCreations]

Thanks! I have asked several expert FE builders thus far and they are going to get back to me in the near future. I thought there might be a few resident experts on the forum as well and that is why i posted this question here in the FE section where they would most likely lurk.

Small block strokers and big block strokers are different animals. While i have built several small block engines, this is my first FE motor.

So, for those with 427 FE based strokers, what cam are you using and with what compression ratio?
Do you like it? Would you change anything about it?

My car will be used on the street. I am used to using cams in small blocks that have a durations of around 240 max with a 10:1 compression ratio, but for the most part i have used cams with duration in the 220s. I guess i dont fully understand why i can use a 218/218 duration cam in a 302 and turn 6,000 rpm all day long, yet according to what i am hearing, the same duration cam will go flat several thousand rpms before in a FE stroker. Ive used low duration cams in 427 chevrolets-222/226 and they turn all the way to 6500 with stock cast heads without issue.

This engine will have around 10.2:1-10.5:1 compression ratio. I spent a small fortune on the big bore aluminum shelby block and i purchased 72cc edelbrock aluminum heads to go with it. I will only use this car for street use but i still dont want to use a cam that will not pull hard off the line to 6,500rpm. I dont care about spinning the engine past 6500 and i could care less how fast the car is above about 70mph. Due to this being a 527 stroker motor, i dont see why there would be any issues with torque.
My last replica was around 2400 pds with a 331 stroker with 185cc AFR heads and a 228/236 duration camshaft on a 110 lobe seperation(330 at the rear wheels) I used a real dyno . The car was probably the scariest thing i have ever driven. I assume this engine will have around 150-200 more horsepower at the wheels and due to the weight of the car, most of it will not be useable.

[olddog]

Originally Posted by RestoCreations

My car will be used on the street. I am used to using cams in small blocks that have a durations of around 240 max with a 10:1 compression ratio, but for the most part i have used cams with duration in the 220s. I guess i dont fully understand why i can use a 218/218 duration cam in a 302 and turn 6,000 rpm all day long, yet according to what i am hearing, the same duration cam will go flat several thousand rpms before in a FE stroker. Ive used low duration cams in 427 chevrolets-222/226 and they turn all the way to 6500 with stock cast heads without issue.

This engine will have around 10.2:1-10.5:1 compression ratio. I spent a small fortune on the big bore aluminum shelby block and i purchased 72cc edelbrock aluminum heads to go with it. I will only use this car for street use but i still dont want to use a cam that will not pull hard off the line to 6,500rpm. I dont care about spinning the engine past 6500 and i could care less how fast the car is above about 70mph. Due to this being a 527 stroker motor, i dont see why there would be any issues with torque.
My last replica was around 2400 pds with a 331 stroker with 185cc AFR heads and a 228/236 duration camshaft on a 110 lobe seperation(330 at the rear wheels) I used a real dyno . The car was probably the scariest thing i have ever driven. I assume this engine will have around 150-200 more horsepower at the wheels and due to the weight of the car, most of it will not be useable.

I have not owned a BB since the early 1980's, and never had anything that big.

1) I wouldn't want to spin that long stroke monster over 6K. It will live a lot longer if you target no more than 5500.

2) I may get flamed, but high duration cams is a crutch for poor flowing heads. The first FE was 331 cid. Ford did all the head development for the 427. Edel may have improved over the original Ford work, but getting enough flow for 527 cid through FE heads is not easy.