need some cam imput options:

this is going to be a tow/low end tq
ly6/6.0
5.5k truck weight / 4wd truck/ 6l90e/ 4:10's/

my DD, 6.2/ bolts ons with the following cam/ pulls good , but lacks low end.
206/216
.553/.553
113/117


truck will have full bolts/ e-water pump/ will prob work and mill heads to get 10.5 CR/ dont want to run FI or anything higger than 4.10 at the end.

any cam specs for powerband on low rpm?

 

I would call up Comp Cams and ask them as they are very helpful and have been around quite a while.

 

@Summitracing is on here and could give you some direction. Very surprised the 206 216 115+2 is lacking low end on a 6.2L. Sounds like a tuning issue. But if that's not suiting you on a 6.2L then maybe the Summit 8727R1 200/205 113+4 in the 6.0L will. With a 29* IVC it's smaller than I'd normally recommend for anything larger than 5.3L but it'll be a stump puller right off idle in a 6.0L.

 

call texas speed and ask them. since they make cames for trucks and have all the dyno sheets and anything you might need.
summit will just be a guy behind a computer reading about what you ask them, while hes on his 9-5 shift.
texas speed guys actually make, test, and use their products.

 

Maybe, if you're calling their sales line. But @Summitracing is also a sponsor on here and the account they use is monitored by a select couple of valvetrain specialists. TSP doesn't share how much advance is ground into the camshaft, nor do they provide the .006" values as reference points to really give a better picture of the characteristics. Dyno sheets @ WOT are nice but they don't tell you the full answer of how it's really going to behave in the vehicle.

 

Search around the internet and you will find wide LSA cams are not great for low end torque. I have the Texas Speed stage 1 truck cam (208/214, .550/.550, 112 LSA) and it makes some good low end torque. I haven't had the stock cam for several years, so it difficult to remember how the stock cam performed. The Texas Speed stage 1 makes good torque 1900 rpm and up, above 2300 rpm and it will pull my 6000lb trailer up any hill. Summit also has some good choices, SUM-8727R1 (200/205, .550/.550, 113 LSA) or the stage 1 high lift (209/217, .550/.550, 112 LSA), which is very close to the Texas Speed stage 1. Honestly that 200/205 cam from Summit looks interesting with the .550 lift and short duration.

 

OP,

We're in line with @68Formula. If you're after low-end torque and want something easy to get along with the SUM-8727R1 would be a good fit. With specs of .550/.550, 200/205, 113+4 with -23* overlap it's a bit on the small side of what we'd typically recommend for a 6.0. However, from what you're describing you're after it fits the bill. It'll just have a hint of an idle to it and will be easy to tune. With its 29* IVC it'll have great off-idle torque on out through the mid-range. With budget-friendly LS6-style springs, you can run it out to 6,000+ rpm. The 4.10 gears and planned 10.5:1 compression will certainly help with low-end grunt and towing. Added compression is a gain in hp/tq across the entire range.

Reducing the head gasket thickness is an easy way to get a .2-.3 compression bump. A .040" compressed thickness head gasket such as the Cometic CGT-C5751-040 would net you right near 10:1 in factory form. The added benefit is reducing the quench distance. Reducing quench into the optimal range creates a more efficient combustion cycle and reduces the chance of knock.

Something to keep in mind is what octane you plan on running and what kind of towing is planned for this truck. As a general guideline for trucks when towing, we typically find 10:1 static good for 87 and 10.5:1 good for 93. These are general guidelines we've seen. You can always pull timing to "keep it safe" but it's not good to constantly pull timing if static is too high.

Seeing this is an LY6 you'll have to delete the VVT to run any aftermarket 3-bolt cam such as our Pro LS lineup. We have VVT delete kits to help with that.

From your potato chip eat'n Mountain Dew drink'n 9-5er

On the weekends you'll find me in this office



Joe with Summit Racing

 

Your octane requirements are best found using dynamic compression vs static. You can find a calculator on line, I think Keith Black has/had one.

the amount of timing you use has a big influence of octane requirements too.

an LY5 has 9.9X and is fine on 87