[ZLRob]

Originally Posted by 18.2SS.1LE

What kind of gains are you attributing to the LT1's increased intake duration and lift? We're not talking about large cams here, as ZL14EVA posted his LS9 OE spec cam picked up 4 mph in the 1/4. I don't think you'd see a drivability difference with the stock duration the car came with from the factory. The LS2 being naturally aspirated is a different animal. These boost applications need help getting the extra exhaust out of the cylinder as there's a hell of a lot more to move than an NA car.

Here's a dyno of a FBO X Port ZL1 with the stock cam but meth as it doesn't have the lobe for the fuel system. I don't think the stock LT4 cam is the limiting factor but fueling sure is.

My argument here is if OP is going to put a cam in for more fuel (and power) but wants stock drivability and reliability, there are limitless better options than a stock LT1 cam spec. The whole goal is more horsepower, why not make it more efficiently in the process?

I understand where you're going as far as argument sake is concerned, and I agree, there are cams out there that make more power than LT1/4 specs. That I'll never negate. I've had this argument endlessly at this point with so many others. Not everyone wants to go all out on their internals builds though and not everyone wants to go through the hassle of measure this for pushrods, remove old valve springs, install new ones, run these lifters, degree this cam, and then you're going to need to replace this stuff sooner rather than later even if it's set up correctly because it is harder on the valve train, valve springs lifters etc. not to mention power levels past the mid 800's start requiring driveshaft changes, and even transmission internal upgrades (which just based on our interactions I'm pretty sure he's not looking to get into). He's looking for a solution that is easier to deal with that runs mostly stock stuff and if his upper limit is 850 RWHP with a Procharged set up, I'd say that's pretty darn solid.

If LT4 cam makes 850 full effort using meth without E85 I wonder what it would make full effort with E85 and no meth if it was produced with a 32% lobe.

LT1 with lobe will definitely make 850 full effort with E85. I gotta wonder what it would make with meth on gasoline. That is an experiment someone else would have to take on though because it's not one I'm willing to do myself.