N2OMIKE

iTrader: (3)

want to sell the ac lines?
Oh and by the way nice build so far.

2XR95Z28

iTrader: (4)

What bracket are you talking about? lol i'm confused. As for the oil pressure sensor, how much you want man? throw me a PM.


As for selling the A/C lines shoot me an offer through a PM.

Thanks for the compliments guys!

ss.slp.ls1

iTrader: (36)

The little black metal braket thing that looks like a big cup holder that's on the passenger side of the engine bay.
I'll check to make sure I still have the sensor tonight.

2XR95Z28

iTrader: (4)

Oh ya, def forgot about that one haha. Will take that off next time i work on it, PM me if you find that sensor. Thanks!

Cross

iTrader: (10)

Wait so your saying that with the .028 to .026 Head Gasket on a STOCK bottom end it goes from 10.4:1 to 11.5:1?? Thats a 1.1 Point increase.

I ask this because in my 355 Build we got 10.8:1 Pistons and I told them I wanted to use the Impala Gasket as I wanted to be over 11:1 Compression. They told me I should be but frankly if this here is right it sounds like I would almost be at 12:1. Def not complaining as that would make me even happier. I just need some confirmation here.

I was about to request my LT4 Heads be milled a little to ensure I got to around 11.5:1 but if I am at 12:1 or right next to it then I am happy.

ss.slp.ls1

iTrader: (36)

He is running milled heads. I think that the combination of milled heads and a .026" head gasket is what will result in a 11.x:1 compression ratio. A 12:1 compression ratio is pretty radical for a street car. You'd probably be pinging on pump gas if you actually had a 12:1 compression ratio. I'm sure you are at or around the 11:1 CR you wanted.

Cross

iTrader: (10)

Well my plan was to use E85 shortly as I have 3 stations right around here but now I have no idea what to expect. Anyway I do not want to take away from this persons thread so I made one myself with more spec. information.

Sounds like you already covered it for me but it never hurts to ask.. well mot of the time lol.

Either way def like seeing the build, I can't say myself I am ready to lose my AC... but then I have a child and a wife and I want to be able to Daily Drive mine when i want with them in the car... here in the Desert that means AC is a must if I want them with me lol.

2XR95Z28

iTrader: (4)

Ya mine isn't My DD and i got t-tops so thats my A/C haha.

As for the compression ratio stuff, this is all stuff i have read on here and i know alot of it isn't true but from what i have gathered here i seem to think i should be around 11:1 - 11.5:1 I wish i could find out for sure though...

Cross

iTrader: (10)

Mines not supposed to be my Daily Driver. I have another toy I road course with that's supposed to be that but I keep playing with it too. (I am about to install Megasquirt and try reving to 8700RPM with it after the other changes I have in mind... not to mention I just picked up another Eaton M45 Super Charger... so much for daily driver)

ss.slp.ls1

iTrader: (36)

I don't like the way you said "try".

zigroid

iTrader: (22)

have you done any measurements? the numbers don't add up.

I have actual measurements on my engine. every single one of my pistons was in the hole more than .025" that everyone says is normal on a SBC/LT1. the furthest was .031", the shortest was .026". the average of the 8 was .028". my heads had a very very slight mill. one head had a 53.4cc chamber, the other had a 53.8cc chamber. using the stock LT1 8cc valve relief pistons and my mr gasket .026" thick head gaskets I calculated an average compression ratio of 10.87:1. lowest cylinder could be 10.7:1, highest cylinder could be 10.9:1. In order to get 12:1 on my setup my heads would have to be milled enough for the combustion chambers to be 46cc. that is a LOT of milling.

I would take a guess and say your compression ratio with milled heads will be a little over 11:1. you don't need E85 you should be able to run pump gas just fine.

Cross

iTrader: (10)

Yeah unfortunately I am not sure about the oiling system even shimmed... but we shall see. Good thing is these Mazda V6's are cheap I have 2 currently.

ninjai_ruken

More pics! lol

2XR95Z28

iTrader: (4)

I have never taken measurements as i am new to figuring out all this stuff like i said in the other thread, i am making all these statements off stuff i have found on here and i know you can only beleive some of this stuff but i fiigured if i've seen it multiple places from diff people it's gotta be somewhat near the truth. Sounds like you know your stuff and i give you props for that. Anyone else agree that i would be closer to 11:1? I just want to figure it out haha.

I'll get more as i work on stuff more and more parts come in. I just don't see the point of taking multiple pictures of the same thing haha. I try to get pics of everything i do and all new parts though, check later in a few days and i'll have pics of new parts coming in.

zigroid

iTrader: (22)

I have an excel spreadsheet that calculates static compression and dynamic compression ratio among some other things. it is a very helpful tool but there are also online calculators.

http://www.rbracing-rsr.com/compstaticcalc.html

try that one out.
bore: 4"
stroke: 3.48"
HG thickness: .026"
deck height (piston in hole): .025" (avg for LT1s/sbc)
piston top volume: 8cc
combustion chamber volume: 54cc (stock LT1)

I get 10.88:1. that is basically a stock LT1, unmilled heads, with mr gasket .026" head gaskets.

do you know how much your heads are milled? flat milled heads lose about 1cc of volume for every .006" milled. if you have a .015" cleanup you are down about 2.5cc from stock. put that in the calc and you get about 11.2:1 compression ratio. a .030" mill would be down 5cc from stock and that would give you about 11.6:1. you would need 47cc chambers to get about 12:1 c/r. that would require about .042" milled off your heads. thats quite a bit. If you have milled that much you will need to correct the intake manifold to fit the heads and block. it may fit, it may not. sometimes the intake to head seal isnt good enough and oil can get pulled in to the intake port. the engine pulls vacuum all the time so its always sucking something in. its also a pain to figure out why you are burning oil. easier to fix problems the first time than to have to tear it all back down.

2XR95Z28

iTrader: (4)

Alright well i've been trying to get ahold of the shop that did my heads to get an exact number on how much they took off the heads and once i know that i'll be able to know for sure. Thanks for the help though man, you def know your stuff

JoeliusZ28

iTrader: (2)

i thought you told me they took .030 off?

I took .020 off of mine and used impala gaskets.... the number in my sig was just a guess.

2XR95Z28

iTrader: (4)

I never got to talk to the guy who actually did the heads just the guy at the desk and he said that is what they normally take off so i'm not 100% positive yet. I gotta call this week and talk to the guy who did them and find out forsure.

2XR95Z28

iTrader: (4)

Plugs came in today, thanks Elliott's94Z!!!



Hoping some more stuff comes in in the next few days!

2XR95Z28

iTrader: (4)

UMI EGR Block off plates came in today, Thanks Herron Performance for hooking me up one again!