_LS1_

iTrader: (1)

Okay so I'm getting ready to do my cam swap, and I've been doing research trying to find out what I'll have to do with my heads. I've got stock LS1 heads, and I've got a fairly big cam (236/242 .580/.590 on a 112 lsa). I've got a set of duel titanium springs good enough for .600 lift. I'm kinda wondering if this set up is going to work without head porting, or if I'm going to have to port the heads?

Any advice?

Chelsea.

NemeSS

iTrader: (127)

how much powr u want? max effort? what other supporting mods are alredy on car?

Sales2@Texas-speed

iTrader: (5)

With that duration you'll likely need all of the valve drop you can get (piston to valve clearance) depending on what those lobes are like. You'll want either a Stage 1 ported GM casting (stock valve size for better clearance) or one of the aftermarket castings that give you better clearance. We offer the Stage 1 LS6's that would accommodate that camshaft without any changes to the bottom end of the motor, as well as the PRC 215 head (aftermarket casting) that will be even better if they're in your budget!

Let us know if we can help with your combo!

_LS1_

iTrader: (1)

I've got an 85mm TB & Intake manifold, & headers, and a 3000RPM stall. I've got a GM hot cam currently & I'm just not happy with the performance. I've got the valve springs, lifters, & RR to swap when I do that swap, I've also got a set of 36# injectors on their way in.

_LS1_

iTrader: (1)

should I just swap to an LS6 intake as well?

NemeSS

iTrader: (127)

u can upgrde to a stock set of ls2 243 or 799 heads. bolting on stock set of these heads will increase your scr. and a slight mill wil raise it even more.
even in stock form they will wake up the car with that cam.
u will need appropriate springs, pushrods,adj.timing chain, new head gaskets.
a vj and mill would compliment the heads even more. if u gonna take the heads off and dont the $ for ported heads, they are better option than reusing stock ls1.

_LS1_

iTrader: (1)

I've got a better set of timing chain & gears on the car already, upgraded the water pump, oil pump and all that other lovely stuff. I bought a set of MLS Stock head gaskets from speed inc, I also bought a set of REV duel titanium valve springs, seats, retainers, and keepers good for .600 lift. The pushrods I don't have though.. Those springs will work right?

NemeSS

iTrader: (127)

its quite a more steps than just sliding the cam in place and bolting stuff down,
the new head gaskets will raise or lower scr, affect quench, and i machine relieves to the psitons anyways and always verify quench,scr,dcr, pr length
so i never have any ptv clearnace probs. or sewing machine sound.
i would recommend the springs be checked at machine shop for open and seat pressure coil bind,etc., and when degreeing cam, verify correct specs. if using 1.7 rockers multiply that times the cam lobe lift for valve lift number.

WSsick

iTrader: (13)

youre gonna want a ported FAST intake and TB combo to help that big cam breathe.

_LS1_

iTrader: (1)

I have an 85mm TB & Intake setup already, I'm gonna need more?

NemeSS

iTrader: (127)

i have oem ls6 intake with bbk 85mm tb and car makes around 490rw. with bigger engine and bigger cam. will the fast make it better, sure. do i need it. not for the street. nah.
if u got the regular ls1, upgrade to ls6 intake is a good choice.

Paint_It_Black

iTrader: (1)

Bad idea. You sink the valves enough and you effectively shorten the length of the throat and cost the head flow and thus power. I doubt the OP wants to trade convenience for power potential.

Sales2@Texas-speed

iTrader: (5)

^^We do not sink the valves on the Stage 1 LS6's. These get the better valve drop, as compared to a Stage 2 or whatever ported casting, from stock valve size and minimal milling (clean-up only).