BryanPendleton

I am coming to grips with the reality that I will never gather enough data, knowledge and understanding that I would be able to spec my heads and cam solution. That said I am looking for tested heads/cam combinations (ie. dyno charts) for a 346ci LS (stock short block) that will output 350+ ft-lbs of torque from 3000 RPM all the way through 6000 RPM. Application is a C5 6MT used for HPDE track days (not drag racing, but road racing) and street driving. Prefer to keep the engine speeds to no higher than just over 6000 rpm, as well as keeping the valve lift to a minimum to maximize reliability and longevity of the motor.

Predator-Z has graciously offered a reverse-split solution to me, but I am concerned about the aggressiveness of the cams with lifts over .6". That said I am looking for tested/proven solutions and figured I can pick from that what I feel is best for my application.

Thank you,

Bryan

wildcamaro

iTrader: (15)

Any mild cam will get you 350+ torque, you may have it already...some of the newer 600 lift cams aren't an issue because they are designed in order to avoid fly cutting (ptv) problems due to the valve timing events...I know the tick performance cams are good at that...

BryanPendleton

<Morpheous Voice>Show Me.</Morpheous Voice>

I am not talking peak. Any mild cam will not yield 350+ ft-lbs from 3000 to 6000 rpm as many dyno charts I have seen with heads and cams miss the mark. Now I will agree that it's no tall order but as mentioned above "show me".

Most of the h/c that meet this goal are laying down around 400 wtq and 400+whp PEAK, but as stated, I don't care about peak, I want the solid torque powerband of 350+wtq from 3k-6k.

BryanPendleton

Here is an example of what I'm looking for:
http://www.toquez06.com/dyno.html
This gentlemen meet my goal with an AFR head and LG G5X1E cam.

wildcamaro

iTrader: (15)

Oh my bad I didn't realize you were talking under the curve power as most people are all a out peak power...have you ever had your car dynoed? Just curious where you're at

BryanPendleton

Plan to soon. Currently with Dynatech longtubes, mystery exhaust and Callaway honker is waiting for install, then plan to tune.

BigBirdLS1

Predator-Z already gave you a solution...and don't worry about the lift as much as there are cam lobes that are very easy on the valve train.

ds98formula

iTrader: (3)

Lots of cams can do that for you. I have the si5 and 350+tq from 3200rpms to 5600rpms

BryanPendleton

I like to shop around and see what all my options are before commiting thousands. And I worry about lift because more lift mean higher spring loads which means more friction and wear. Higher lift means more fatigue wear on the valve springs. With the engine seeing hours upon hours of abuse on the race track, I prefer to keep it as mild as possible to maximize longevity.

I am sure there are lots of tried and true solutions and I look forward to seeing some posted.

BryanPendleton

Too narrow, looking for 3000-6000rpm

squirlNUTZ

What a out the Asa cam? It will be close to 350@3,000 and with some 1.8 rocker arms it would be. One of the flattest curves still to this day. Damian on this board had some experience with this cam and 1.8 rocker arms but I can't find the thread.
But, this one is close
https://ls1tech.com/forums/dynamometer-results-comparisons/608044-asa-cam-226-236-525-110-lsa-dyno-s.html

BryanPendleton

Some impressive output for just a cam only. Just shy of the output I am looking for but still amazing for just a cam. I wonder how that cam pairs with aftermarket heads?

squirlNUTZ

The Asa cam was designed for sealed racing class. It has an outstanding torque curve and paired with stock or milled ported or not ls6 heads and 1.8-1.85 you would be over 350 torque at 3,000 rpm and it would pull to 6,500 or better. The fuel cut off in the class was 6,500 I think. This camshaft was designed for what you want I think. Easy on valve springs, ( most use yellow ls6) and makes great power. Loves nitrous too!
226/236 .525/.525 @ 110 with 1.7
226/236 .556/.556 @ 110 with 1.8
226/226 .571/.571 @ 110 with 1.85 rocker arms

BryanPendleton

Would love to see some dynos with the 1.8 rockers or 1.85 rockers.

redbird555

iTrader: (14)

I agree with the others, in this day and age a .600 lift cam is nothing to be afraid of. Many people DD them, with a good quality beehive and a mild ish lobe you will have many trouble free miles.

I think your torque could can be achieved, why not get with Martin at tick and talk? His sns stage 2 puts out very stout tq numbers

ds98formula

iTrader: (3)

That is cam only I am sure any set of heads should get you the extra couple hundred rpms.

R6cowboy

iTrader: (3)

I have a 346c.i. LS1 heads/cam combo in a C5 M6 which makes 350+ ft lbs from ~3000 rpm to 6400 rpm with a somewhat mild cam. 375wtq @ 6000rpm. Makes 400whp @ 5200 rpm and 425+whp from 5800 to 6600 rpm. Motor also uses stock LS6 intake manifold, stock LS1 tb, stock LS2 maf, 1.75" long tube headers. Also has stock drivetrain exception for an LS7 clutch. This was on a Dynojet 224.

Kinda sounds like what you're looking for...?

BryanPendleton

Absolutely! Got dyno plots? What are the H/C details?

BryanPendleton

Not taking chances or gambling, I want to know what I am getting.

BryanPendleton

Thanks, I will add Martin to my list of builders/shops that I am calling.

Materials may have improved. Quality control tightened, but at the end of the day, more lift means more spring load which is more wear and tear and fatigue in the valve train. If all the car was used for was the street, I wouldn't hesitate to install aggressive lift cams, but with half-hour sessions of aggressive driving under lateral G's in excess of 1G, I prefer a more conservative build.