Setup right now is stock bottom end ls1 with a tsp torque v2, yells terra 1.8 rockers, fast 102/102 intake and throttle body, and some ported 5.3 heads that were milled .020 and had larger(stock ls1 valves installed) by a local shop. Car made 467 through a m6 and strange s60 and the shop that did the heads feels it would make even more with a better cam. Wondering what you guys would suggest that would fit and work well with those heads without flycutting. Unfortunately I don't have any flow numbers on these heads but I assume they do pretty well considering the dyno numbers. I have been eyeballin a btr stage 4, but don't know if it will fit, probably should just give a cam guru a call(pat g, martin @tick, or Geoff @eps). Also going to be putting a built 4l80e and fti 4k stall in it and hoping to do some bracket racing once I get the chassis and suspension sorted out eventually. Let me know what you guys think, look forward to the suggestions.

 

I used to run that exact head and cam but with a LS6 intake. Who did the 5.3 heads?

 

Local shop in Ocala Florida. BRC performance, they're hand ported, didn't trust them really at first until I saw the dyno numbers, obviously they changed my mind a bit, lol.

 

Problem is if you go bigger, you run the risk of having to flycut. If that's okay with you, go bigger cam, pull the heads and mill them more so you can get to the highest compression you fuel will allow. You already have a damn stout combo as is, but I agree a bigger cam would make it more powerfull.

 

That kind of hp it should run 10s.
What does it run?

 

Waiting to pull the 6 speed out as the clutch and hydraulics are on there way out and the power just blows right through the clutch. Hoping the 4l80 and fti 4k stall will work well with my power and 3.73 gears. I've also added a ssra and put a straight 4 inch tube in between the 104mm lid and 102mm tb(when I dynoed it had the stock maf in place) also switching from pacesetter 1 3/4 headers to tsp 1 7/8 headers. Still prefer not to flycut but I figured there was still room for a healthy bump in cam size, maybe I was wrong....

 

You have 467hp now, how much Hp do you really think you are going to gain V Dollars you are going to spend changing the cam.
My guess 10-15hp at most

 

For the cost of a cam and headers I would think some well ported 243s would be money better spent.
1 3/4 is plenty of primary diameter for stock displacement, bigger may make a bigger hp number but I doubt will go any faster.

Which bring me back to the how fast is it now question.

 

470 rwhp LS1 is just badass. Those heads are really working!! My partner makes 484 rwhp and that's with high dollar mast heads up top. Props to you but it sounds like you ready to move up to a stroker LOL.

 

I already got the headers bc the pacesetters were rusting down at the collector. Got the tsp headers when they had a sale going on anyways so it was no big deal. I was just seeing what was out there to make some more power, I Will probably do a flowmaster 4 inch merge collector at the end of the y-pipe and a 4 inch bullet dumped before the axle and ditch the 3 inch cooker catback.

 

If you do go with a different camshaft, make sure the lobe design is appropriate for the 1.8 roller rockers and that the spring being used is optimized for the added ramp speed the 1.8 ratio rocker will generate. Not to mention the higher moment of inertia the roller rocker is stuck with.

I do things a bit differently than most when it comes to roller rockers, but I guess that's just because I've seen some pretty bad valve train combinations that had valve float a la carte when using roller rockers.

I do agree with some of the other comments that a cam swap alone will not net you much gain. Possibly 8-12rwhp and maybe another 15rwhp if you go large enough. This will most likely require fly-cutting and if you're going to fly-cut, you may as well mill the heads to the max and go for the gusto.

 

Martin, do you think things could be dangerous the way it sits with the torquer v. And 1.8 rockers, I got the car this way so I don't mind changing it if it's wrong

 

I've seen some XER/LSL/LSK lobed camshafts have issues with 1.7 ratio rockers, let alone 1.8 ratio.

With that said, if it has sufficient spring pressure, adequate sized push rods and a good lifter it will do just fine. Just not my choice in lobe design for those rockers.

 

Ok, if I were to put a set of stock rockers back on there what came would you recommend? Would I be able to run one of your sns torquemax stage 3 cams? Really like the numbers I've seen them put down

 

If you installed stock rockers you could easily run our SNS Stage 3 camshaft, but with your heads being milled .020" and having a 2.0" intake valve installed your valve drop is no longer stock.

To use the SNS Stage 3 in a stock bottom end engine safely you would need an un-milled cylinder head, stock thickness head gasket and stock diameter valves.

You will have to fly-cut if you wanted to run the SNS Stage 3 in your engine.

 

OP, if you're going to spend all the time and money to change out the cam for minimal gains, why not have Martin do you up a custom cam? Like I said before, if you're going to do this, go ***** deep into it and get your money's worth. Pull those heads, mill the **** out of them, run 12:1 compression, and have a nasty *** custom cam that will really shine with that combination.

 

Martin, what do you think I could get away with if I switched back to stock rockers. I figured I'd be able to still run something pretty healthy sized considering I'm running a tv2 with 1.8 rockers and no issues.

 

Don't want to pull the heads back off of this engine, eventually it will be getting a stroker anyways, so no need for me to rip this one all back apart. A cam swap wouldn't take me too long though.

 

I would not personally chance running a SNS Stage 3 with heads that are already milled .020" and the valve drop has been modified further by installing a larger intake valve.

I would not feel comfortable with you running it.

There is no other cam IMO that will fit and fit safely that will be worth while changing to and even if you did jam a SNS Stage 3 in there with your current combo minus the 1.8 rockers you'd still only gain 10-15rwhp. If even that much...

If you want a substantial gain in power you'll have to do a substantial amount of work/modifications.

 

Alrighty then