LSGunZ28

iTrader: (8)

Is that honestly all? It isnt more harsh on the valvetrain? isnt noisier? or anything? Just price??

LSGunZ28

iTrader: (8)

In this case, forget solid rollers. would this work with the cam I was gonna run?

Im forgeting all my automotive knowledge, me not working on cars since december.

99blancoSS

iTrader: (115)

Well I have to be honest I'm cornfused now..LOL
I thought you were thinking about the caddys but then decided to stay with the ls7's?

Whats springs are you going to run? what lobes on the cam? There is a lot to matching it all up.

Stang's Bane

iTrader: (22)

That is where it is all at. The whole thing is a system. From the cam lobe to the valve tip. It all has to work together. It needs to be as light as possible but rigid at the same time.

LSGunZ28

iTrader: (8)

The springs are PRC double springs, theyre beefy

They come on the PRC 5.3 heads stg 2.5

Lemme try n list everything

Whatever TSP PRC 5.3 stg 2. heads come with thats what I have.

Although I was just checking my valves and Im very confused

the PRC heads have 2.02 int and 1.575 exh valves, he told me to make sure I dont have the 2.04, because it can either have 2.04 and 2.02. So I measured them..

I keep measuring mine and these are the measurments Im getting..

1.600" exh and 2.18" int...

2.18" is a Huuugeeee size, I dont get why Im getting this measurement.

could TSP actually accidentally installed this valve on their 5.3 heads??

I measured it 6 times, I got a lowest reading of 2.16 and I turned the valve and got 2.18... then every time 2.18. I even wiped off carbon to see if that was the difference...

no, 2.18" again.. wtf??

This is what I had before, stock 90k mile Ls1 with brand new Tv3 cam(now damaged) and 5.3 heads... this is the engine I had with caddy lifters

Now I have a 402, 238/244 cam, and reusing those 5.3 heads... This is the engine I wanna use my Ls7 lifters on because of bad experiences with caddy lifters

So the Caddy lifters are what I had in my old engine, LS1.. The caddy lifter collapsed which caused my engine to get damaged. WHich is NOW why im going with a 402 instead.. and Im NOW gonna use the LS7s, vs the Caddy lifters, which , like I mentioned I had in my old LS1....the only thing Im reusing from the old LS1, and thats being transferred to the 402 is my oil pan and 5.3 heads, Im replaceing a couple valves, the cam, maybe the rockers to the Harland sharps... I may use my pushrods, depending on if I need to. I have the 7.400"

my heads arent milled, but I am gonna run a slightly thinner gasket than before...

LSGunZ28

iTrader: (8)

helppp on the last commenttt..

99blancoSS

iTrader: (115)

Need to know the cam specs, not just duration. lift and lobes is important info your missing

LSGunZ28

iTrader: (8)

Ok hold on...

and also disregard that comment about valve size.

Im stupid. its 2.018", not 2.18"

but the exh is 1.600"

LSGunZ28

iTrader: (8)

238/244 .615"/.612" 113lsa +2
3017r/3038r Hr113+2

LSGunZ28

iTrader: (8)

238/244 .615/.612” 113LSA +2 advance (with 1.7 ratio rockers)
Comp XFI/XFI lobes
3017R/3038R HR113LSA +2 advance (111 installed intake centerline)


Cam Valve Events 0.006 0.050 0.200
Intake Duration - ID 288 238 159 3017R XFI lobe .615"
Exhaust Duration - ED 296 244 163 3038R XFI lobe .612"
Lobe Center Angle - LSA 113 113 113
Intake Centerline - ICL 111 111 111

Intake Valve opens - IVO 33 8 -31.5 BTDC (- indicates ATDC)
Intake Valve closes - IVC 75 50 10.5 ABDC
Exhaust Valve Opens - EVO 83 57 16.5 BBDC
Exhaust Valve Closes - EVC 33 7 -33.5 ATDC (- indicates BTDC)
Exhaust Centerline - ECL 115 115 115
Overlap 66 15 -65 degrees


• Static/Dynamic Compression with new cam: 11.17:1, 8.20:1
• Recommended springs: Patriot Extreme dual valve springs with Ti retainers.
• Recommended pushrods: 7.425”

LSGunZ28

iTrader: (8)

when I had the cam speced I told em my valves were 2.04 and 1.575

but Im afraid its 2.02 and 1.6

I hope that isnt a big enough dead for my cam to not work well.

Paint_It_Black

iTrader: (1)

it won't be

DrkPhx

iTrader: (15)

LSGunZ28 - I run the LS7 lifters on my setup. Cam is also ground on XFI lobes. I do have lightweight intake valves and the upgraded AFR dual springs with more pressure. The current shift points are set at 7200 rpms. I may bring it down to 6800 or so, but I will play around with it at the track. Otherwise there is no problem.

BTW - How are measuring the valves? Post a pic using a dial caliper and valve with the LCD showing the measurements.

LSGunZ28

iTrader: (8)

Are you still going to ask how I measured my valves after I corrected that it was 2.018" not 2.18" or did u miss that point?


I know how to use the dial caliper, for some reason I read it wrong. I havent used one since dec 2007. I havent been doing anything automotive since then. Im losing my touch. :-/

LSGunZ28

iTrader: (8)

.......

LSGunZ28

iTrader: (8)

I ordered a new oil pressure sending unit, LS7 rockers and 4 new intake valves and 2 new exhaust valves... and 4 lifter trays and bolts...

Haans249

iTrader: (24)

I hope you meant LS7 Lifters, and not rockers!

LSGunZ28

iTrader: (8)

LS7 lifters, yes...

Man the valve covers were expensive. Im gonna stick with original ones..

anyone wanna sell some for cheap?

LSGunZ28

iTrader: (8)

So tell me, when I go to rplace the few valves that may have been bent, should I take it to a professional, or can I do it myself?

Im replacing a few valves.. ALSo wtf is this crap I hear about the PRC dual springs breaking? why is everything defective?!

Stang's Bane

iTrader: (22)

Everything breaks. if more than 1 person is running something in the HP world, one of them is gong to break sooner or later.

If you don't want to worry about breakage, don't start it.