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Author Topic:   how much compression?
MrWesson22
Gearhead

Posts: 1280
From: Dacula, GA
Registered: Sep 2000

posted 11-23-2001 11:58 PM     Click Here to See the Profile for MrWesson22   Click Here to Email MrWesson22     Edit/Delete Message   Reply w/Quote
I'm thinking about milling my heads for more compression. How much CR can I get away with on 93 octane with 70 4V heads with this cam...

282/288 adv dur 244/[email protected]" 108LSA

If I committed to using octane boost, how much compression could I run? How much extra hp/tq would this be worth over the pump gas CR? Thanks.

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Neal
Member #723
[email protected] AIM: MrWesson22

69 Gulfstream Aqua Grande
351C/Toploader 4sp

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MrXerox
Gearhead

Posts: 348
From: Oklahoma City, Oklahoma
Registered: Nov 2000

posted 11-24-2001 03:17 AM     Click Here to See the Profile for MrXerox   Click Here to Email MrXerox     Edit/Delete Message   Reply w/Quote
I would suggest running around the same profile ground on a 110LSA if this is a street car. I ran a 108 with close to 11:1 on my 71 quench headed 4V motor and having to put octane boost in every fill up is a pain in the arse. The roller 244/[email protected] .623/.623 110LSA cam I run now is awesome for the street and since your car is a stick, the slightly bigger profile will work perfect for you.

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MrWesson22
Gearhead

Posts: 1280
From: Dacula, GA
Registered: Sep 2000

posted 11-24-2001 10:17 AM     Click Here to See the Profile for MrWesson22   Click Here to Email MrWesson22     Edit/Delete Message   Reply w/Quote
It's going to be 80% strip, 20% street.

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Neal
Member #723
[email protected] AIM: MrWesson22

69 Gulfstream Aqua Grande
351C/Toploader 4sp

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Moneymaker
Administrator

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

posted 11-24-2001 01:15 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
The tighter the LS the more cylinder pressure. With a 112 or 114 LS you can have 12.5 to 1 compression and still run on pump gas.

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Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00 & '01
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link

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MrWesson22
Gearhead

Posts: 1280
From: Dacula, GA
Registered: Sep 2000

posted 11-24-2001 11:57 PM     Click Here to See the Profile for MrWesson22   Click Here to Email MrWesson22     Edit/Delete Message   Reply w/Quote
So how much can I run with this cam?

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Neal
Member #723
[email protected] AIM: MrWesson22

69 Gulfstream Aqua Grande
351C/Toploader 4sp

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7DMACH1
Gearhead

Posts: 2359
From: PHILA. PA.
Registered: Feb 2001

posted 11-25-2001 12:55 AM     Click Here to See the Profile for 7DMACH1   Click Here to Email 7DMACH1     Edit/Delete Message   Reply w/Quote
I WOULD SAY 9.5 TO 10.0.

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RAY . FLY THE FLAG, SHOW THE WORLD WE ARE PROUD AMERICANS!70 MACH 1 351C NOW 408 STROKER 4SPD.
86 MERCURY CAPRI 5.0 RUNS 12.86 @107 1.65 60 ft.
2001 LINCOLN LS V8 1997 MUSTANG
SHOW THE WORLD, LIGHT A CANDLE.
http://www.geocities.com/slariviere/7DMach1.html

[This message has been edited by 7DMACH1 (edited 11-25-2001).]

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Moneymaker
Administrator

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

posted 11-25-2001 01:22 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
11 to 1 with 93 octane and no more than 34 degrees of timing should work.

------------------
Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00 & '01
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link

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