I am putting a 4.500 bore 4.000 stroke 6.385 rod with 11.1 comp. afr 315cnc heads, edelbrock 454r intake with 1050 dominator, 4000 stall, turbo 350 trans, 29" tall tire 4.56 gear in a 3550 lb car. Looking for a solid roller for street/strip car. I will shift at 7000 ?

UD Harold - Wolfplace need cam recommendation

mb69ss,

What sort of valve lift are you comfortable with? A good daily driver is the Lunati 502A4LUN, 287/295 at .020, 256/264 at .050, .660"/.660" gross valve lift, and 110 LSA. In a heavier car, with 3.9 rear and 3000 SS, the owner could drive it 125 miles to the strip, run some 11-teens, and drive it back, same size engine.
You could run any cam up to the 502A8LUN with your combo. The 502A8 is 296/308 at .020, 265/276 at .050, .710"/.710" gross valve lift, and 108 LSA. Needless to say, it would be much faster on the strip, the 502A4 much more streetable.
There are several more choices in between.....

UDHarold

Thanks Harold, As far as valve lift i think the heads peak out at .700 lift, I am trying to put the car in the mid to low 10's if possible. I don't mind if it's on the radical side just want the most i can get out of it, whatever you recommend and i will order it up! Thanks, Mark.

mb69ss,

You will like the 502A7LUN, it's 292/300 at .020, 260/270 at .050, .685"/.685" gross(.660"/.660" net) valve lift and 108 LSA. This is a reliable piece, very torque-y with that 108 LSA. I put them in around 102° ATDC, +/- 1°. We run it a lot in 1/2 mile Asphalt Mods and Super Mods, as well as in bracket cars. It is as streetable as any 509 with a 4000 SS converter and 4.56s can be.
How fast it runs will depend upon how well you get your car to hook.....
Make sure to use a big, 250-gph+, fuel pump....

UDHarold

Hi Mark,
Lifters get there ok?

Only things I would change is I prefer a wider separation in 500+" engines.
They make so much low end I feel spreading the lobes is a good thing ;)
I'd like 110-112.
I'd opt for more lift. Those heads flow real good to .700+ so it would be nice to use a .420 type lobe.
Also, I think you will find those heads do not need the large spread most Rat heads do.
About 4 to 6 degrees more on the exhaust works real well unless you are planning nitrous.
This is assuming a decent exhaust system behind the heads.
Have Harold do a cam with a .420 lobe, 260/265 or so & put them lifters to work :D

Hi Mike, Lifters are great, That sounds good and hopefully Harold will reply with his thoughts. Hey Mike would i benefit from a 4.250 crank making a 540 because my engine builder said this combo with the 4.000 stroke would be better because the big bore is there plenty of torque and now you can gain topend with a little more rpm ... True? Mind you small tire street/strip car.

Originally posted by mb69ss:
Hi Mike, Lifters are great, That sounds good and hopefully Harold will reply with his thoughts. Hey Mike would i benefit from a 4.250 crank making a 540 because my engine builder said this combo with the 4.000 stroke would be better because the big bore is there plenty of torque and now you can gain topend with a little more rpm ... True? Mind you small tire street/strip car. =
The great too much power debate :D
Small tire street/strip,,, hmmm if you can hook it up the bigger engine is going to run better period. It's a free 30-40 HP by even a conservative estimate.
It will make more power but again making it work can be "interesting" ,,,,
I would have built the 540 from scratch but that's just me, I like HP.
That said, I have been tryin to talk a customer into a 377 instead of a 400 for his alcohol modified because I can't see him getting it off the corner with the 400 at 2500lbs but we shall see as he has decided on the 400.
The good thing is it's always cool when someone complains of too much power to an engine builder :D

Thanks Harold, i guess i was still sleeping this morning when i overlooked your post, Mark.

Mark,

I have another cam that might interest you.
It is the Lunati 502A6LUN, 287/295 at .020, 259/267 at .050, .731/.731 gross valve lift with .710/.710 net lift, and 110 LSA. We can make it on 112 LSA if you wish, and I have this family of profiles every 2°, starting at 251 on a SBC core, up to eventually 277, 281, and 285.
The 281 and 285 are both over 200° at .200"---These cams aren't slouches!!!
They have an excellent 10-year racing history, but I have not used them very much on the street. Their parts such as springs live all year, even in 8000-rpm SBC Late Models and Sprints.

UDHarold

UDHarold,

Any sold rollers on the way?

lynchgss,

First will be the VooDoo solid rollers--The hydraulic rollers are about ready to launch now...
The solids range from 231 at .050, .3700" lobe lift, to a 285/293 at .020, 255/263 at .050, .4000"/.4000" lobe lift monster.
All these have very gentle(for rollers) opening and closing ramps. We are just now preparing to dyno-test them, this will take about a month.
In my Super-K racing series, I already have new masters for the 288/296 and 310/318, measured at .016". 255/263 and 277/285 at .050, all lobe lifts .4164".
One customer has already bought 4 of the 310/318s for 540 bracket cars. The .200 durations are about 199/207. The 288/296's .200 numbers are 180/187---The original UD 288/296 is 176/183 at .200, same aproximate lobe lift.
Later, I will have Super-K profiles from 245 at .050 to at least 291 at .050, all with .4164 lobe lift.
I am also working on .441, .456, .485, .510-.515, .530, and .556 families, all drag cams.
Oval families are .4164, .430, and .447 groups.
All families have 6 or more profiles in them.
I also have 3 or 4 .842 solid lifter families, and all this is besides the VooDoo concept, which includes hydraulics, hydraulic rollers, solid rollers, and solid flat tappets. They will be introduced in that order, and the hydraulics are available now.
I've really been busy the past 2 years, and we're working on getting masters made.

UDHarold

BTW, I have had a .556"/.530" BBC(54mm core) running for about a year now. Dynamics are OK with 1.8 rockers on the intake, 1.000" valve lift. How does 314 at .020, 282 at .050 sound to you?

UDHarold,

I know you have been to busy to keep track of my 288/296, But I can't wate to see how much more power and tourqe your new solid roller cam's will put out!
Well got to get up at 4:00am, so I'll see ya latter.
Goodnight

Harold, where would you install the 502A6 at assuming a 110 LSA, My guess would be 104? Would i have to change springs every year?

mb69ss,

Yes, I'd put it in around 104° ATDC, give or take a degree.
As far as the springs, I'd check them every winter. It all depends on how high you take the engine. Our SBC Sprint and LMs could run the usual 4 races every weekend, turning 8100, and change springs in the fall. Of course any over-revving should cause you to check the springs out.
We have run some of this series in 540 Off-Shore boat engines, and they run about full-open for an hour or so. I do not believe the springs would last the usual 400 hours that Mercury wants....
Of course that would be a LOT of 1/4 mile runs...

UDHarold