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Author Topic:   compression help
RONNIE
Gearhead

Posts: 115
From: MD
Registered: Jan 2003

posted 04-06-2003 08:23 AM     Click Here to See the Profile for RONNIE   Click Here to Email RONNIE     Edit/Delete Message   Reply w/Quote
IHAVE A 69 302 BORD .40 OVER WITH PERFORMER RPM HEADS,IT HAS STOCK CRANK AND RODS,I RECNLY INSTALL A SET OF KEITH BLACK .200 DOME PISTONS,WHEN I STARTED THE MOTOR I WAS GETTING WATER IN MY OIL,I WAS USEING FEL-PRO .40 HEADGASKET,AND NEVER HAD THIS PROBLEM BEFORE SO A FRIEND SAID TO DOUBLE UP ON THE GASKETS AND I DID AND STILL THE SAME PROBLEM.TO MAKE A LONG STORE SHORT THE PROBLEM WAS MY INTAKE WAS LEAKING WATER PROBLEM FIXED.WITH THE DOUBLE GASKETS WHAT IS MY CR.AND WILL IT GIVE ME MORE HORSEPOWER IF I USE ONE HEADGASKET AND WHAT BRAND OF GASKET DO I USE.

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V8 Thumper
Gearhead

Posts: 4377
From: Arizona
Registered: Dec 2001

posted 04-06-2003 10:20 AM     Click Here to See the Profile for V8 Thumper   Click Here to Email V8 Thumper     Edit/Delete Message   Reply w/Quote
Doubled up head gaskets??? NOT GOOD
Check out these guys: www.cometic.com
Here's a link to calculate your c/r:
https://mustangsandmore.com/ubb/CompressionRatio.html

------------------
1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9"

All Blue Oval, no blue bottle
http://mustangsandmore.50megs.com/V8Thumper.html

[This message has been edited by V8 Thumper (edited 04-06-2003).]

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V8 Thumper
Gearhead

Posts: 4377
From: Arizona
Registered: Dec 2001

posted 04-06-2003 10:41 AM     Click Here to See the Profile for V8 Thumper   Click Here to Email V8 Thumper     Edit/Delete Message   Reply w/Quote
Here's another one:
http://www.dragnbreath.com/dragnbreath/TechNotes.html
And yet some more good stuff:
http://www.speedomotive.com/auto_math_101.htm
More great reading:
http://www.speedomotive.com/Building%20Tips.htm

------------------
1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9"

All Blue Oval, no blue bottle
http://mustangsandmore.50megs.com/V8Thumper.html

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RONNIE
Gearhead

Posts: 115
From: MD
Registered: Jan 2003

posted 04-07-2003 06:17 AM     Click Here to See the Profile for RONNIE   Click Here to Email RONNIE     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by V8 Thumper:
[B]Here's another one:
http://www.dragnbreath.com/dragnbreath/TechNotes.html
And yet some more good stuff:
http://www.speedomotive.com/auto_math_101.htm
More great reading:
http://www.speedomotive.com/Building%20Tips.htm

[thanks for fast reply i will check out those sites ronnie. /B]


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RONNIE
Gearhead

Posts: 115
From: MD
Registered: Jan 2003

posted 04-10-2003 05:44 AM     Click Here to See the Profile for RONNIE   Click Here to Email RONNIE     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by RONNIE:

THANKS FOR THE DIFFERENT SITES TO CHECK OUT. BUT MY QUESTION IS WITH THE DOUBLE GASKETS WHAT IS MY CR.AND WILL IT GIVE ME MORE HORSEPOWER IF I USE ONE HEADGASKET AND WHAT BRAND OF GASKET DO I USE AND WHAT THICKES DO I USE? RONNIE

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69maverick
Moderator

Posts: 1455
From: Thomaston,CT.
Registered: Jan 2001

posted 04-10-2003 07:59 AM     Click Here to See the Profile for 69maverick   Click Here to Email 69maverick     Edit/Delete Message   Reply w/Quote
Your compression is lower with 2 HEAD GASKETS so you have less power = LESS H.P.

[This message has been edited by 69maverick (edited 04-10-2003).]

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Moneymaker
Administrator

Posts: 25883
From: Lyons, IL, USA
Registered: May 99

posted 04-10-2003 08:39 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Use single VIctor Reintz #3428SG head gaskets Ronnie.
YOu should gain about 2 points of compression and about 15-20 HP if all else is well.

------------------
Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com

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V8 Thumper
Gearhead

Posts: 4377
From: Arizona
Registered: Dec 2001

posted 04-10-2003 08:52 AM     Click Here to See the Profile for V8 Thumper   Click Here to Email V8 Thumper     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by RONNIE:
THANKS FOR THE DIFFERENT SITES TO CHECK OUT... BUT MY QUESTION IS WITH THE DOUBLE GASKETS WHAT IS MY CR.


That's what those 'different sites' are for... for you to calculate your c/r. Only you know what your combustion chamber volume is, how much volume your domed pistons displace, the compressed thickness of your gaskets, and of course bore and stroke. Use the formulas, plug in the numbers and there you go.

quote:
AND WILL IT GIVE ME MORE HORSEPOWER IF I USE ONE HEADGASKET AND WHAT BRAND OF GASKET DO I USE AND WHAT THICKES DO I USE?

Of course it'll give you 'more horsepower'... reducing the swept volume will raise the compression ratio. I don't know who recommended that you stack head gaskets, but that sounds like a recipe for catsrophe ! Head gasket failure just waiting to happen !
The thickness is your choice. You'll need to run a mock-up c/r calculation to see where you're at now, and change the compressed thickness variable to see different results. With domes, you can probably run a fairly thick gasket (.040+), but that too depends on your piston depth/deck height (also specified in one of the above links). I've already given you my choice for a gasket manufacturer. I'm not trying to be a pr*ck, but read through the links I posted. Not only will they answer your questions but you'll learn the how's and why's. Knowledge is good

------------------
1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9"

All Blue Oval, no blue bottle
http://mustangsandmore.50megs.com/V8Thumper.html

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V8 Thumper
Gearhead

Posts: 4377
From: Arizona
Registered: Dec 2001

posted 04-10-2003 08:59 AM     Click Here to See the Profile for V8 Thumper   Click Here to Email V8 Thumper     Edit/Delete Message   Reply w/Quote
Hey Alex, what steam hole pattern do those Victor gasets have? Early or late? Just curious

------------------
1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9"

All Blue Oval, no blue bottle
http://mustangsandmore.50megs.com/V8Thumper.html

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Moneymaker
Administrator

Posts: 25883
From: Lyons, IL, USA
Registered: May 99

posted 04-10-2003 09:00 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Cometic is great stuff! I use and highly recomend them. I probably turned most of the guys around here on to them.
Their products are more expensive and just not as readily available as the Victor.
The Victor head gaskets are available at ANY NAPA store or MMR.

------------------
Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com

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RONNIE
Gearhead

Posts: 115
From: MD
Registered: Jan 2003

posted 04-10-2003 06:36 PM     Click Here to See the Profile for RONNIE   Click Here to Email RONNIE     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by V8 Thumper:
[QUOTE]Originally posted by RONNIE:
[b] THANKS FOR THE DIFFERENT SITES TO CHECK OUT... BUT MY QUESTION IS WITH THE DOUBLE GASKETS WHAT IS MY CR.


That's what those 'different sites' are for... for you to calculate your c/r. Only you know what your combustion chamber volume is, how much volume your domed pistons displace, the compressed thickness of your gaskets, and of Hnumbers and there you go.

quote:
AND WILL IT GIVE ME MORE HORSEPOWER IF I USE ONE HEADGASKET AND WHAT BRAND OF GASKET DO I USE AND WHAT THICKES DO I USE?

Of course it'll give you 'more horsepower'... reducing the swept volume will raise the compression ratio. I don't know who recommended that you stack head gaskets, but that sounds like a recipe for catsrophe ! Head gasket failure just waiting to happen !
The thickness is your choice. You'll need to run a mock-up c/r calculation to see where you're at now, and change the compressed thickness variable to see different results. With domes, you can probably run a fairly thick gasket (.040+), but that too depends on your piston depth/deck height (also specified in one of the above links). I've already given you my choice for a gasket manufacturer. I'm not trying to be a pr*ck, but read through the links I posted. Not only will they answer your questions but you'll learn the how's and why's. Knowledge is good

[/B][/QUOTE]

COMPRESSION,I THINK IAM NOT ENTERING IT RIGHT.HELP ITS A STOCK 69 302 BORD .40 OVER . ALUMINUM RPM 60 CC HEADS WITH .200 DOME PISTONS THANKS RONNIE

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RONNIE
Gearhead

Posts: 115
From: MD
Registered: Jan 2003

posted 04-10-2003 07:25 PM     Click Here to See the Profile for RONNIE   Click Here to Email RONNIE     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Moneymaker:
Cometic is great stuff! I use and highly recomend them. I probably turned most of the guys around here on to them.
Their products are more expensive and just not as readily available as the Victor.
The Victor head gaskets are available at ANY NAPA store or MMR.



I JUST USED ONE OF THOSE SITES AND CAME UP WITH 10.1 WITH A .40 GASKET AND 9.1 WITH DOUBLE GASKETS DOES THAT SOUND RIGHT? THANKS FOR EVERYONES HELP. RONNIE P.S. IF YOU WANT TO SEE MORE OF MY CAR GO TO WWW.RONS.MUSTANGII.NET

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V8 Thumper
Gearhead

Posts: 4377
From: Arizona
Registered: Dec 2001

posted 04-10-2003 07:37 PM     Click Here to See the Profile for V8 Thumper   Click Here to Email V8 Thumper     Edit/Delete Message   Reply w/Quote
That's probably fairly close

------------------
1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9"

All Blue Oval, no blue bottle
http://mustangsandmore.50megs.com/V8Thumper.html

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MAV
Gearhead

Posts: 209
From: Macon,Georgia, U.S.A.
Registered: Mar 2002

posted 04-10-2003 10:33 PM     Click Here to See the Profile for MAV   Click Here to Email MAV     Edit/Delete Message   Reply w/Quote
Alex , I will be putting the 60cc Victor jr.
heads on my 308 .It has speedpro Hypereutectic Flat tops with four Valve releafs.The releafs are deeper,and wider than most aftermarket pistons I`ve seen. The thing is,I really don`t want to mill the heads because they will be on a 393w next year ,but I want to get the compression up as much as possible while they are on the 308 by using a thin gasket. I see that Fel-pro makes a "different" type gasket for use with Aluminum heads thats not supposed to brinnel (dent) the head like regular 1011-1 gaskets would. Does victor make a thin gasket that would suit my needs? Or do I need to call Cometic and fork out the big bucks ?

------------------
http://maverickgrabber.iwarp.com

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Capri
Gearhead

Posts: 1368
From: Lyons, ILL, USA
Registered: May 99

posted 04-11-2003 12:23 AM     Click Here to See the Profile for Capri   Click Here to Email Capri     Edit/Delete Message   Reply w/Quote
You will have to go with the Cometic gaskets for a thinner head gasket. As far as I can see, the Victor, and the Fel-pro gaskets will compress to about .048 to .050. You can also try Flat Out gaskets. www.flatoutgaskets.com They make quality products. I dont know for sure what sizes or pricing they have though. We have just done some testing for them. Try to get with Mark. Tell him we sent you and what you might need. If he can help, he will.

------------------
Tony Denysenko
O-P/SA 5302 IHRA Stock Eliminator
H-I/FA 3302 NHRA Stock Eliminator
MoneyMaker Racing

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Moneymaker
Administrator

Posts: 25883
From: Lyons, IL, USA
Registered: May 99

posted 04-11-2003 09:27 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by V8 Thumper:
Hey Alex, what steam hole pattern do those Victor gasets have? Early or late? Just curious


Both.

------------------
Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com

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V8 Thumper
Gearhead

Posts: 4377
From: Arizona
Registered: Dec 2001

posted 04-11-2003 06:25 PM     Click Here to See the Profile for V8 Thumper   Click Here to Email V8 Thumper     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Moneymaker:
Both.



Really now

That's good to know

------------------
1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9"

All Blue Oval, no blue bottle
http://mustangsandmore.50megs.com/V8Thumper.html

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