specs of e303 cam w/ 1.72(1.71) r.r

9

91lxntch

Member

Sep 27, 2003

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altoona,p.a

Apr 27, 2005

#1

• Apr 27, 2005

• #1

does anyone know the specs of an e303 cam with using the 1.72 or 1.71 roller rocker's its 220/220--498/498 w/ 1.6

 

Grn92LX

Fidanza Man!

Founding Member

Jan 14, 2001

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New York

Apr 27, 2005

#2

• Apr 27, 2005

• #2

Add about .030" to the specs using a 1.7

 

MrKwik

Founding Member

Jan 29, 2000

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Kansas City, Kansas

Apr 27, 2005

#3

• Apr 27, 2005

• #3

The cobra 1.72's will bring it to about .535.

 

T

TbonesBlack92GT

New Member

Apr 19, 2005

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Apr 27, 2005

#4

• Apr 27, 2005

• #4

MrKwik is correct. .535 lift using 1.72 rockers (.498 divided by 1.6 x 1.72)

 

9

91lxntch

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Sep 27, 2003

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altoona,p.a

Apr 27, 2005

#5

• Apr 27, 2005

• #5

well im trying to decide wether to switch cams or just change rockers...does anyone know if the duration will change and if so what? also what would be the rpm range now its like 2-6k

 

T

TbonesBlack92GT

New Member

Apr 19, 2005

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Apr 27, 2005

#6

• Apr 27, 2005

• #6

Some articles have stated 2-4 degree increase in duration due to the increased time the valves are off of the seat.

You might consider testing a valve spring or two to make sure that they can handle the increased lift. It made enough of a difference on my 72 Nova w/383 a few years back and I lost performance until they were upgraded (of course that was a Chevy, live and learn).

 

Michael Yount

Mustang Master

Apr 10, 2002

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Charlotte, NC

Apr 27, 2005

#7

• Apr 27, 2005

• #7

I couldn't tell any difference at all when mine had an E cam in it between 1.6's and 1.7's.