VLS1

Hi guys, just typed up my post and lost everything as it timed out, so I will keep it short! New member from Australia and looking for some camshaft advice mostly at this stage.

Will keep it brief and stick to the basics for now.

Stock unopened LS1, will be putting together the combo from home, and I definitely do not want to fly-cut pistons.

Car weight is around 3000lb without driver.

Will be running FAST 92, PRC as-cast 225 cathedral heads, upgraded valvetrain components, approx 10.9:1 static comp, 1.75" tri-y headers into 2.5" twin exhaust, @4500rpm stall, TH400 3spd, and 3.7 gears in the rear.

Custom fuel system, and happy to upgrade injectors if required.

Would like strong torque from 3500rpm, and hoping for 450+ rwhp with good power right through to around 7000rpm shift speed. Idle quality and peak HP figures are not important, but I would still want to be able to drive it to and from the track, which is mostly highway cruising and the car won't see daily driving in heavy traffic either. Hoping to see this thing go close to 130mph trap speed, but that might be asking a bit much.

Looked at a few off the shelf cams in the 232-237 @ 0.050" range and 112-114LSA? But anyway, looking for any thoughts/advice as there seems to be a lot of knowledge amongst forum members here, and it has been a few years now since I was last in the game of engines/racing and all that.

Any thoughts would be great, thanks guys!

PREDATOR-Z

240/248 .609/.615 110+2 lsa

VLS1

Thanks for the recommendation, would you get away with that duration without running into P/V clearance issues?

VLS1

Also, would you suggest a comp xer style lobe?

VLS1

Just crunching some numbers Predator-Z, I come up with 24 degrees overlap. Not too excessive?

PREDATOR-Z

Do you want to drag or go play the fiddle?
That is max effort, yes xer lobes, you did say race right?
And once one sees a cam this size, you do not ask about ptvc, you simply measure. It 'should' fit a stock LS1/LS6 block. If you take a close look you'll see that it is 2 degree smaller than a Trex on the intake side, that is all

VLS1

Yeah correct. I read a lot about different options, seen motors smash valves before and owned cars with cams this size and larger in the past. Looking to do something a bit different, i.e. Go fast without an idle that sounds like the world is about to end.

I have also seen LS1's pull some very sub par figures with big cams back when I worked for a tuning shop years ago. I would much rather see a torque curve similar to this www.ls1tech.com/forums/showthread.php?t=1601398 and then possibly spray it later on down the track once the car is sorted and consistent.

sabersaw30

iTrader: (10)

It is hard to go 130 n/a. You need more cubes.

VLS1

True, I have run 11.70's previously @115mph from memory, with only 350rwhp out of a 355 cube donk in a car weighing around 3400+lb... That was only with doing half a dozen passes, and the thing didn't 60ft all that well really, but still that was street trim and the car was soon sold. The new car should come in under 3000lb really, but I am only guesstimating at this stage.