LostCauseZ06

iTrader: (4)

ok everyone.. i just had a valve spring break in my 2002 Z06 and i am going to build a new motor for it (it was off warranty so i have to pay for it all).


Currently i am thinking about going with a 408 stroker.. iron block, Patriot stage 3 fully assembled heads, and some nitrous....

my question is i have NO idea where to start as far as valvetrain... what are some good combos for cam size and such?? it needs to be somewhat streetable and reliable but mainly im looking for all out power.

the goals for the car is i want to be around 500 RWHP - 550 RWHP naturally aspirated... then add some nitrous on top of that. it will have full long tubes and vararam intake.

i mainly need opinions on heads and camshafts... i would like to go solid roller so that i can rev the motor to the moon but what else do i need to go solid? just different lifters/pushrods??

also rotating assemblies... what are good brands??? is it better to just get pieces at a time or to just get a whole rotating assembly kit ??

777

iTrader: (21)

Did the valve spring mess up the entire engine? Anyhow pm VINCE on here. He makes right at 550rwhp N/A and a LOT more on spray. He has a 408 with some heads from futral. Also has a custom grind cam from futral (it's big).

strokedls1

iTrader: (1)

If you want to do a solid roller you need, bigger springs with heads machined to clear them. You also need lifters, pushrods, and adjustable rockers. Not a cheap coversion from hydralic. You will need a better intake like the fast 90mm or a carb style intake with an elbow. The patriot heads won't make that kind of power. I would say afr 225's would be a better choice. If you do all of these things you will be at the power level you want. Remember that you are going to need a good clutch and a tranny buildup and rearend work with a 408 on spray. It can get really expensive fast especially if you are not doing your own labor.

777

iTrader: (21)

If you do the stuff strokedls1 said I see no reason why you wouldn't be able to get 600+rwhp out of a 408 N/A

LostCauseZ06

iTrader: (4)

i actually disagree... i have a buddy with patriot stage 3 heads that are ported and he put down right around 500 RWHP on a stock bottom end stock cubed heads/cam only car...

as for the spring screwing the whole motor... yes

spring/sucked valve/snapped valve/melted piston/shattered piston/rod through cylinder wall.

so far its a total loss.. the head is really messed up, the connecting rod is bent to hell. the crank is most likely damaged, the cylinder wall is non existent (seriously there is only half the sleave left in it....)

pewter 01 SS

iTrader: (5)

you should also look into LME, i just got my 408ci from them, still breaking it in but as soon as I get dyno #'s I'll post them up.. I went with afr 225's heads think their better then the patriots.. anyways call bryan at LME theyll help you out.

777

iTrader: (21)

I can count on 1 hand the amount of people running a 346ci heads/cam car that have 500RWHP. They most certainly aren't using patriot heads.

LostCauseZ06

iTrader: (4)

would you like a dyno graph?? i can surely get you one

LostCauseZ06

iTrader: (4)

if i remember right he was 488 RWHP, he was 660 on a 150 TNT shot.. i could be a bit off but i know im pretty close.. ill get actual numbers for you.. and possibly a dyno graph..

~JOSHUA

iTrader: (92)

I'd keep an aluminum block. Why add 100lbs to your car for no real reason. There's nothing wrong with an LS1,2,or 6 block holding that power and it's not much more expensive.

777

iTrader: (21)

Tell me his complete list of mods and give me a dyno graph. I still find it hard to believe. People are usually very happy to get over 450 or right around there.

LostCauseZ06

iTrader: (4)

oops my bad!!!! i apologize.. it was 440 RWHP on his motor.. heads/cam only with full bolt on.

777

iTrader: (21)

That's cool, and believable. What cam does he have.

LostCauseZ06

iTrader: (4)

its a 240 246 608 613 with 110 LS

777

iTrader: (21)

Here are a couple of the big stock cubed powerhouses.

Jason99T/A (sponsor) - 505rwhp 418rwtq
348ci forged shortblock, Thunder Racing ported 5.3l heads, Cam Motion 246/250 110lsa hyd. roller cam, Moser 12-bolt (4.56/spool)

TTPMatt (sponsor) - 505rwhp 436rwtq
TTP Stage 4R Heads/Cam Package
10.9:1 C/R on 93 pump gas
LSX 90mm Intake
NW 90mm Throttle Body
Kooks 1 3/4" to 1 7/8" Stepped LTs
3 x 2 1/2" X-Pipe through Dynomax UltraFlo Mufflers

This is through a 9", 35 spline axles, spool.

FutralMotorsports (sponsor) - 550 rwhp 448 rwtq Runs a HUGE solid roller cam and race gas.

777

iTrader: (21)

that's a big cam. He should be making a lot more, like 475rwhp with some better heads.

CRZY747

How many miles did you have on your car when you blew the motor ??? do you beat the **** out of it or what ???

LostCauseZ06

iTrader: (4)

yeah it lopes pretty good.. hes a damn cool guy.

so is it worth it to go with a solid roller ?? this is now my project car. im actually doing bodywork/full chassis build up while im doing the engine so no worries about beefing up everything else up.

i just really need some suggestions as to a somewhat streetable cam. where would you guys go if you were in my shoes?? im set on a stroker motor.. id like a 408 but anything else would work as well.. opinions??

NOSjohn

iTrader: (9)

Vararam CAI for a big cube small block?

My choice - SDPC for a LS2 402...with your choice of cam. Something along the lines of around 236/240...maybe.

LostCauseZ06

iTrader: (4)

there was 72,000 i bought the car for VERY cheap and it ran very well. LS6 valvesprings are BAD BAD news... they get brittle and break very easily.... check out Z06vette.com and read the COUNTLESS stories of broken springs and full motor replacements under GM warranty... just so happens i got a bad one