Spoolin

iTrader: (8)

dcr = Dynamic compression ratio
scr = static compression ratio (I believe)

I know a little bit about what they mean but I'll leave it to someone who knows more about it to explain it. But basically dcr is one of the most important things when building an engine. It takes into account of few variables that ultimetly determine your true cr.

PS if you don't wanna wait google it and read up on it.

ZR1 DREAMING

iTrader: (28)

I already answered that. 243s on an LQ4 with .040 gasket will be ~ 10.5:1.

iamkeniff

iTrader: (16)

but i thought it was IF i milled them

i'm sorry ZR1 DREAMING

that's a good enough compression for me.

can i go with a 7.4 push rod or would i have to get a shorter ones for either one of those cams?

Niff

TXsilverado

iTrader: (19)

do you know the dcr of the combo?

Tootall

iTrader: (79)

there's a few posts about this already . . . . another member here KB has the same if not a simlar setup.

He's running mid 12s on stock street tires.

iamkeniff

iTrader: (16)

HOLY POOP!
i just want 13s

Quik's post to KB:
well on a LQ4 you would be at 10.5 with 243s, if you would put on a set of 5.3s heads that would take the CR up around 10.9
i think those heads are 61cc

so .015 would get you down to that CC roughtly you can go .030 and take yourself down to 59cc roughly

i'll keep the heads stock because 10:5 is a good compression on a street motor right?
or do you think i should get it to 11:1?

Thanks

TXsilverado

iTrader: (19)

haha youll definately hit 13's if its set up right. ever thought of a smaller cam?

iamkeniff

iTrader: (16)

i was thinking about one of these two also:

230/224 .575/.563 111 LSA
or
224/224 .563/.563 114 LSA

like i said, i really don't know what cam to get, but i do know that i want a noticable idle and a good cam to go with my 3200 stall.

gears will be unknown because i'm going to run it on the stock 3:42s if i don't like it then i'll see how the 3:73s will do

tdrumm

iTrader: (18)

That would be dictated by the cam valve events.

iamkeniff

iTrader: (16)

ok, so basically pick the cam that i want and then decide what gaskets i want then find out the compression after you take what the cam/head gaskets/heads will give you then you decide to change gaskets or mill heads however much to reach what compression you want?
wow that was probably the STUPIDEST sounding sentence i've ever typed.

sorry if you don't understand what i'm talking about because i honestly don't either.