LSGunZ28

iTrader: (8)

From Texas speed

I have decided my combo for now...

I ordered my 402 with -10cc pistons and a .045" gasket for a compression ratio of 11.1 :1 , I could have gone with the .040" gasket but I didnt...since I dont want too much compression with the Torquer 3 cam and my 5.3 heads that Im reusing...

FAST 36# injectors

85mm maf SLP, since my old stocker delphi wasnt working

oil pan gasket for when I make a swap

New headbolts

Ill be getting anew crank bolt from my local auto shop, since I forgot to order it...


should this be all I need for a swap?

My goal is to achieve a driveable street car that will be seeing the track and dragstrip... I dont care if Im short of 500whp at the moment...

LSGunZ28

iTrader: (8)

Oh dear I must install heads and a cam, yet again...

Im gonna reinstall my old rockers vs the YTs I have now and reuse my caddy lifters. how do I set preload?

Also what engine break in procedures is mostly recommeneded by LS1 users, this will be my first 0 mileage engine Ill have, in any car Ive owned under my name. DDD

LSGunZ28

iTrader: (8)

oh and I just went with an eagle crank and rods, with upgraded rod bolts.

Honestly I wont be seeing over 650whp with this engine and thats if I choose to use nitrous. which I doubt...

xBROKEx

iTrader: (7)

you cant really set preload on sto rockers since they arent adjustable

LSGunZ28

iTrader: (8)

So should I resoak my lifters? and after that, just drop in the lifters and install my old rockers? and thats all??

Also where can I get new rocker pedistools(where the rockers sit on) I have brand new rockers, but dont wanna reuse my old pedistools(plus I think one is bent)

LSGunZ28

iTrader: (8)

.........

JonCR96Z

iTrader: (33)

Did you figure your DCR for the new setup or just the SCR. And as far as break in this link is the best I've ever seen. Motoman knows his ****.

http://www.mototuneusa.com/break_in_secrets.htm

LSGunZ28

iTrader: (8)

Just static CR, I dunno how to figure out Dynamic CR

JonCR96Z

iTrader: (33)

You have to download a DCR calculator. Well, I mean I'm sure you could just do the math. And you have to know the IVC on your cam. A search should get you both things fairly easily. Depending on what your DCR is you may want to run a thinner head gasket. 11.1:1 isn't that high and the added benefits of a lower quench height would help reduce detonation.

LSGunZ28

iTrader: (8)

Okay, thank you.

what is IVC?

JonCR96Z

iTrader: (33)

Intake Valve Closed timing. It's the point where the intake valve closes. Since the intake valve doesn't close until after the piston has already started the compression stroke, your DCR measures the amount of stroke left after the valve closes. Make sure you get the seat timing number (.006). I use the Pat Kelly DCR calc.

LSGunZ28

iTrader: (8)

But I dont know all the numbers

for example my heads are the 5.3 stage 2.5 heads, 862 casting

231/234 .643"/.598" 111 LSA cam

I think theyre 220cc total, but individual that will divide to 55cc per combustion chamber and that seems too low...

plus the piston to deck clearance, what is that? I put 0

and of course the ls2 stroker is a 4" x 4" bore and stroke making 402 cid

and going with -10cc valve relief pistons and .045" gaskets...

Im doing this @ work btw

JonCR96Z

iTrader: (33)

Ok, through some searching. I found that the IVC of your cam is 42.5 (it will vary based on cam grinding tolerances, but hopefully not that much) and the cc on those heads is somewhere in the ballpark of 63 (I couldn't find much info here, it would probably be best to cc them yourself). The 220 number is the volume of the intake port not the combustion chamber.

Piston to deck is the measurement of the piston and TDC in relation to the deck of the block. Most LS1s are in the -.005 to -.010 range. Negative numbers mean that the pistons come out of the hole (or above the block deck).

Using 4"x4", 63cc, .045 gasket, 4.01 basket bore, -.007 deck, and -10cc pistons I come up with 11.1 SCR, which is decent. Bad part is with the 42.5 IVC of the Torquer V.3 the DCR comes up to 10.18, which is way to much. Theres is no way that this will run on pump gas.

You need a bigger cam or a hook up on race gas. I would say the cam would probably be the better route. And if you're gonna have to get a cam it's best to get one custom ground for your application.

Someone please chime in if I did something wrong here. I've been known to let a few typos slide past me from time to time.

LSGunZ28

iTrader: (8)

Hey man I appreciate the time and effort you put in to this..

Im trying to stay as mild as possible with this cam, for driveability..... So what kind of duration and LSA cam am I looking at here ?

also should I go with a thinner or thicker gasket or is the .045" gasket just fine? I only have 91 octane here in CA...

and the deck I need to be looking at is on a LS2 stroker block...

and Im unsure about the head but it seems right. I have no tools to cc the heads.. well in cyl head rbld class we just filled it with a dyed liquid and measuered how much it would take with a flat plexiglass piece with a small hole and some clay to seal the corners and refill the beaker...

edit: nvm I see the 4x4 BxS you used for the deck

Patrick G

iTrader: (14)

That cam is usually +0 from TSP. If that's the case, then your DCR would be 8.45:1. If the cam is +2 advance, then your DCR would be 8.61. Well within what you can run on 91 octane.

LSGunZ28

iTrader: (8)

OK, thanks for clarifying that...

LSGunZ28

iTrader: (8)

I still would like people to chime in....

is it worth going with a thinnger gasket

what spark plugs to run and what to gap them at?

etc...

My stupid parts store doesnt have a crank bolt

edit: Also what clutch for my application. I posted in the maual trans section but the responses are minimal.. and Ihope TSP got me the right reluctor wheel for my car. Im sure he did... he knows its a camaro...

LSGunZ28

iTrader: (8)

spark plugsssss

sidewayz28

iTrader: (24)

didnt you just get through putting your motor back together or something? putting a cam in or something?

LSGunZ28

iTrader: (8)

you must have missed like 5 other threads I made after that...

some are in the gen III section...

anyways long story short

my reluctor wheel died after my head/cam, new exhaust setup AND after it was all tuned and ready to go..

Figured its a couple grand more, but I might as well go with a 402, and keep my old LS1 block and rebuild that later when I have more money...

maybe stroke it and put it in my suburban instead of that heavy 5.3 in there.