high compression

sharpie · Post by **sharpie** » Tue Jul 17, 2007 6:18 pm

twkdcd595;55536 wrote:e85 is pump gas and would handle 12:1 without a problem... would make some great power too.

this is true i put e85 in my car once to try and pass emissions and it ran awsome not one problem but it still didnt pass

stlsupra · Post by **stlsupra** » Tue Jul 17, 2007 8:04 pm

someone else mentioned running e85 and i got sidetracked but i remember wanting to further investigate that idea.

setup is
d16a6 block
a1 pistons
.027" hg (using this hg will net 12.5:1)
z6 head
havn't decided on stock or stage 1 cam that i have or just go stage 3

if i can tune to 93 i'd be ok with that but i wanted to know if other people were in the 12 c/r area.

JustRob · Post by **JustRob** » Tue Jul 17, 2007 8:10 pm

stlsupra;55577 wrote:someone else mentioned running e85 and i got sidetracked but i remember wanting to further investigate that idea.

setup is
d16a6 block
a1 pistons
.027" hg (using this hg will net 12.5:1)
z6 head
havn't decided on stock or stage 1 cam that i have or just go stage 3

if i can tune to 93 i'd be ok with that but i wanted to know if other people were in the 12 c/r area.

With those specs, your at 14.1:1.

And it may be dependent on what cam you use, but I'm sure you will need modifications to the head and a real good tune to use a Stage 3.

stlsupra · Post by **stlsupra** » Tue Jul 17, 2007 8:57 pm

SilverStreak;55579 wrote:With those specs, your at 14.1:1.

And it may be dependent on what cam you use, but I'm sure you will need modifications to the head and a real good tune to use a Stage 3.

using http://www.knology.net/~jediklc/dcalc.htm OR
http://www.c-speedracing.com/howto/comp ... mpcalc.php

i get 12.505984571299928:1 on both sites.

block is being bored out .5mm and i've read that the a1 pistons change the piston to deck height to .040

unless i'm doing something wrong????

JustRob · Post by **JustRob** » Tue Jul 17, 2007 9:24 pm

stlsupra;55587 wrote:using http://www.knology.net/~jediklc/dcalc.htm OR
http://www.c-speedracing.com/howto/comp ... mpcalc.php

i get 12.505984571299928:1 on both sites.

block is being bored out .5mm and i've read that the a1 pistons change the piston to deck height to .040

unless i'm doing something wrong????

I'm using Knology. Somehow I completely missed the piston-to-deck height portion. So, let me get the right...

Deck Height - Compression Height - Rod Length - (Stroke/2) = Piston Deck Clearance

So that means...

212-29-137-(90/2)=1

That means your compression ratio is 3.8:1 :dunno:

God I miss Zeal Autowerks.

stlsupra · Post by **stlsupra** » Wed Jul 18, 2007 12:58 am

SilverStreak;55590 wrote:I'm using Knology. Somehow I completely missed the piston-to-deck height portion. So, let me get the right...

Deck Height - Compression Height - Rod Length - (Stroke/2) = Piston Deck Clearance

So that means...

212-29-137-(90/2)=1

That means your compression ratio is 3.8:1 :dunno:

God I miss Zeal Autowerks.

my book says the stroke is 3.46" wich is 87.884mm formula doesn't say how it wants its numbers? but reading d-series i found a couple spots were people say the piston deck with A1 is .04 so since it was on the internet i believe it

thsmrtone1 · Post by **thsmrtone1** » Wed Jul 18, 2007 2:28 pm

SilverStreak;55590 wrote:God I miss Zeal Autowerks.

Meee Too

stlsupra · Post by **stlsupra** » Fri Jul 20, 2007 8:08 pm

UPS man left me a present today

twkdcd595 · Post by **twkdcd595** » Fri Jul 20, 2007 8:19 pm

nice dome tops... yeah I am thinking you will have a little more compression with those... :ohsnap2: