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12-31-2002, 01:33 PM
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CC Member
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Join Date: Mar 2002
Location: Dallas,
Posts: 31
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Not Ranked
I need more compression.
I have a 351w and have a 10-1 compression ratio. I would like to have it at about 14/1. What options do I have and what do they cost?
__________________
Mark A. Monroe
Fubar
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12-31-2002, 01:39 PM
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CC Member
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Join Date: Aug 1999
Cobra Make, Engine:
Posts: 2,888
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Not Ranked
$600 for a set of domed pistons.
With 14-1 compressiopn you only have one option., $5.00 a gallon race gas. 
Hope this helps.
Cranky  |
12-31-2002, 01:47 PM
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CC Member
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Join Date: Dec 2001
Location: Castalia,
Oh
Cobra Make, Engine: EM cobra, 450 inch sbc running a best ET of 9.14..so far..ALL MOTOR...approx 800 horse.............ERA with 482 FE..All Aluminum Engine
Posts: 1,395
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Not Ranked
Better know what your piston to valve clearance is before you go buying parts.....
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Jack
XSSIVE .....
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12-31-2002, 02:01 PM
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CC Member
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Join Date: Aug 2000
Location: Chicago,
IL
Cobra Make, Engine: ERA 454 S.O.
Posts: 1,684
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Not Ranked
Is this for the street or track? High comp. motors tend to run hot on the street, not reccomended. You will also need to change the cam.
__________________
Jeff
“If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough horsepower.”
Mark Donahue
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12-31-2002, 02:02 PM
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CC Member
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Join Date: Sep 2002
Location: Fort Worth,
TX
Cobra Make, Engine: Superformance Roush 427
Posts: 436
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Not Ranked
Fubar, Are you going to make the Austin Trip in February ?? db
__________________
Don Barnes
Driving Instructor
texasdrivingexperience.com
Texas Motor Speedway
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12-31-2002, 02:12 PM
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CC Member
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Join Date: Jun 2001
Location: Washington DC Metro (Virginia),
VA
Cobra Make, Engine: Classic Roadsters, Tweaked 351W, T-5Z, CRII Tech Support Team.
Posts: 1,895
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Not Ranked
You do have another option.
Leave the CR alone, fill the tank with Premium, and enjoy the ride.
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12-31-2002, 02:21 PM
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CC Member
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Join Date: Mar 2001
Cobra Make, Engine: ERA 427SC w/428 & Richmond 5-speed Car 611.
Posts: 525
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Not Ranked
I have read through various DVSFII posts that most of the Gasholes could increase the compression by merly sitting atop the carb. after a night of raki and Steak & Lubes' finest foods.
That should boost compression right off the gage and may require O-ring heads similar to those of the booster rockets on the shuttle.
__________________
...."they say I'm crazy, but it takes all of my time."
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12-31-2002, 02:47 PM
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I'm a bonehead!
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Join Date: Jan 2002
Location: VA/DE/MD,
Posts: 129
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Not Ranked
assuming your internals can handle it, you could increase compression rather simply by installing some form of supercharger. Probably wouldn't even need to be much of one at that. Maybe from a 3.8 T-Bird?
I'd also be wondering why you would like to do this. Maybe there's another way to get to where you want to be than drastic increases in compression.
__________________
They serve also who stand and wait
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12-31-2002, 03:30 PM
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CC Member
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Join Date: Dec 2001
Location: Olympia/Lacey,
WA
Cobra Make, Engine: West Coast. 514 / 6 speed Richmond overdrive
Posts: 1,981
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Not Ranked
I'll go along with Jeb
Supercharger. And $5.00 per gallon race fuel 
__________________
James Madison, father of the Constitution, said, "If Tyranny and Oppression come to this land, it will be in the guise of fighting a foreign enemy." He also said, "No nation could preserve its freedom in the midst of continual warfare..."
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http://www.standdown.net/index.htm
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12-31-2002, 04:00 PM
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The Royal Rhubarb
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Join Date: Sep 1999
Location: Tioga,
Tx
Cobra Make, Engine: ERA #495,427SO, Stroked
Posts: 973
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Not Ranked
Fubar
I'm running a 13:1 compression
I've never had a over heating problem!!
Just keep up with you timming and everything will be great!! 
The Royal Rhubarb 
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Life is GOOD!!
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12-31-2002, 04:41 PM
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CC Member
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Join Date: Mar 2002
Location: Dallas,
Posts: 31
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Not Ranked
Thanks for the help.
Thanks for the advice you guys. I have been told that I need new pistons (by Norwood) He recommened J&E's at 150 each. Kinda pricey but it's nice to know you got the good stuff.
__________________
Mark A. Monroe
Fubar
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12-31-2002, 04:49 PM
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CC Member
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Join Date: Aug 2000
Location: Chicago,
IL
Cobra Make, Engine: ERA 454 S.O.
Posts: 1,684
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Not Ranked
Shop around. $150 / piston is way too much.
__________________
Jeff
“If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough horsepower.”
Mark Donahue
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