Three questions:
1) How did you manage to use the stock retainers with dual springs?
b) What is your lifter preload with the smaller base circle cam and stock pushrods?
III) How did you manage to find the . for your decimal point, but not anywhere else in the whole post?
Looks to me like your signature sums it all up pretty well....

 

Back on topic, the smallest cam should offer the most power under the curve, based on its VE's.
If all the information in your signature is correct, I would ask why you would change cams for any of the ones that were listed? The 232/234 cam would stand to make the greatest power increase, but is far from an area under the curve cam. In my honest opinion, you would get everything you want and more out of a good set of heads. I know that wasn't what your post was about, but that would boost your DCR and give you a major enhancement to your area under the curve, and still add power all over the place. Just installing a pair of stock (unmilled) LS6 heads with a .040 thick head gasket will suffice, and shouldn't cost you much more than the cam would. That setup should add at least 20 hp at peak, and possibly even more torque on the low end. If your budget allows more than that (ported 5.3 heads, or stepping up to an aftermarket casting) you stand to gain even more.

What LSA is your cam ground on, and how much advance is ground in?

 

112lsa +2

 

Whew, PatrickG. I thought you were going to give out the secret cam specs for free!!

 

The more I read about cams, the more I learn . . . .



and sometime I am even more confused

I think I will just tell the engine builder what I do, and what I want the car to do. Then let him do his work.

Tending to lean with the GMPP Grand AM Cup & Speed World GT cam #88958606
239/251 570/570 106 LSA to a 105 as below.

"For best torque, install the intake centerline 105 for best power install at 107."

and the GMPP LS6 Heads #88958622 also the Grand AM & Speed World GT Heads

 

Not sure how this cam falls into a thread about best area under the curve. Just look at the overlap on this cam. It was designed as a competition RACE cam, not an area under the curve street cam running low compression stock heads.

 

I guess that may be part of my challange Patrick. So much differnt info. Personally I dont car about street use, or once once the cage is finished and the heads & cam are selected.

I look at many many dyno graphs, engine builds, "Tech rules for racing" and I go

 

That ICL is about the best for Area Under the Curve, without chopping the power too much on the big end. 62cc heads and .040 thick gaskets would get you a DCR of 8.73:1, and really bring that cam to life across the board, without compromising valve clearance. Subtracting .013 from the head gaskets and .012 from the deck should still leave you with safe margins.

 

i have the 228/232 .588/.595 110+4.. It is a good cam. Wish i had it on a 112 though

but here is my dyno graph

 

Why would you prefer 112? That would probably only hurt you down low, with little to gain up top. That cam just needs some more compression. A 62cc chamber with .040 gaskets, and a 109* ICL would better balance your VE's and make more power across the board.

 

that is exactly it. being cut on a 106 ICL made it very hard to tune.. Have some tuning issues! I may put thinner head gaskets on to bump the DCR a bit

 

torch your car sounds great

 

That's one sweet graph

 

thanks man!

 

LOL! That's funny. That cam has no place in a thread about power under the curve.

 

haha ^^^^ what he said!! I like my XE-R 224/228 .581/.588 110+2 LSA great power under the curve and pulls hard.

 

Not trying to hi jack your thread but if you get any of these grinded with the LSK lobes would that help as far as area under the curve?

 

If you have heads that support the additional lift.

 

Not sure how this cam falls into a thread about best area under the curve. Just look at the overlap on this cam. It was designed as a competition RACE cam, not an area under the curve street cam running low compression stock heads.



Patrick,
Does the combination of DCR AND SCR affect the amount of overlap you choose in the cams you recommend? Looks like you like to make appx 8.5 DCR?
Or what max DCR are you comfortable with on pump gas? How much overlap goes with that DCR?

 

Just curious but, I have an LS1 car with all boltons except a stall(next week) and I street race mustangs all the time. We are even for about 4 seconds on the freeway(342 gear) before I pull away. I want heads and cam that will jump away and keep pulling. It is a TransAm conv. but I do not want to wait until 6000 rpm to pass. Been looking at 5.3 heads for a little compression and maybe a medium size cam(rough idle preferred) , but not sure. A lot of the shops say big cam , but do not want to wait for really high rpms before power. Installing a 3600 Yank And a 150 shot soon, but not sure about heads and cam. Any help would be greatly appreciated. Thanks.