k5383

iTrader: (10)

I've been a gen 1 guy for the past 4 years so some of my questions might be a little obvious. I also appologize for the long post...

I'm wanting to start building towards a cam swap, right now my car is a full exhaust, lid, 4.10s, monster stage 3 car. It's my daily driver so I don't want to kill its drive-ability.

That being said, here is my "build" list.

MS3 cam: Will this be too radical?
Either keeping my 241 heads or purchase 243 heads. I'm very good friends with a machinist, so I can have them ported and get the springs swapped over real easy. Are there any other heads that are comparable? and affordable?

LS6 intake
water pump
oil pump/o ring?
timing chain
gaskets
head bolts
cam springs

I'm planning on purchasing the TSP kit which comes with springs, pushrods etc.


I have read several threads about needing new headgaskets/bolts, to me that makes me assume that the heads come out of the car. Is this a requirement? Because I've also read several things about pressurizing the chambers and swapping valve springs one at a time, thus NOT removing the heads?

Is there really anything more difficult/different to this than a gen 1 cam swap?

Thanks a ton guys, I'm a noob to LSX stuff

k5383

iTrader: (10)

Doing some more research on 5.3 heads, from what I've read the 799 casting is the same as 243 heads?

garygnu

you can pressurize the chambers to swap springs.the ms3 will work ,but you will need a good tuner.what stall are you running?A4 or M6?

k5383

iTrader: (10)

M6, thanks for your input.

I've got to find someone local to tune it, norris moved

SWEET98SS

iTrader: (8)

You can use dowel rods to hold the lifters up so you don't have to take the heads off. Check ls1howto for the cam swap writeup. I just did a cam swap with my stock 853 heads and I have 405 rwhp and 387 rwtq. Heads will get you closer to 430 to 480 give or take depending on the heads

SOMbitch

iTrader: (8)

Wow a lot ???'s

MS3 is weak on the bottom but you have gears so that is yor call. I would tend to go a little smaller like a TR Raptor that will be a better DD but be real close peak to a MS3...

243's are the best bang 4 buck head on these motors so if you go OEM heads get these. As somebody else stated 799's are the same casting.

If you don't swap heads you don't need head bolts and gaskets. You can change springs by getting a fitting that screws in spark plug holes and pressureizes the valves and keeps them from dropping OR just rotate that cylinder to TDC and the piston will keep the valve up...

You parts list looks good but if you keep your heads you don't need bolts /HG gaskets. Add a water pump gasket and a pulley bolt. BTW I reused my stock water pump. They are easy to change later if they go bad... I asume you already have headers if they have EGR you will need EGR block off plates for the LS6 IM. If you don't have headers buy them before you do this other stuff or are pissing i the wind. Oh.... get the obvious fluids.....


HAVE FUN WITH IT

k5383

iTrader: (10)

TR raptor, I'm assuming that thunder racing raptor? You know any specs on it? I went to their website but they didn't list a raptor.

SOMbitch

iTrader: (8)

It is there here is what they say....


Thunder Racing Custom Camshaft
" RapTR" - 236/242 - .615/.615 - 111 lsa 3000-6800 RPM Power Band. Great mid-range & high RPM power. Requires computer tuning, 3600 converter on autos, 4.10's or greater depending on transmission. Works very well with nitrous and proper tuning. Due to the fast ramp rate of this camshaft, the use of 1.8 rockers is not recommended. Due to the extreme nature of this camshaft, piston to valve clearance must be verified when using modified cylinder heads.


Just scroll down on this page>>>>http://www.thunderracing.com/catalog...&vid=3&pcid=51

It is slightly smaller than the MS3 but will have much better low/mid power because of lobe design but VERY close up top if any loss....

99Bluz28

iTrader: (35)

Take a look at the EPS cams.
http://www.engpwrsys.com/index.php?act=viewCat&catId=16

k5383

iTrader: (10)

wow...i read that page earlier... I dont know how I missed it...haha

So if 799 are the same casting what makes 243 any better? After they were cast were they machined different? Or is it simply to show they were cast in a different place than the 243?

I ask because I have a line on a rather cheap set of 799s.

SOMbitch

iTrader: (8)

They are same unless the 243's came off a LS6 vette so get them. The vette heads have lighter hollow intake valves and sodium filled exhaust valves...

k5383

iTrader: (10)

Ah, well these are bare heads. So I'll be building them up with whatever i feel/learn is best.