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

[91lxntch]

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]

Add about .030" to the specs using a 1.7

 

[MrKwik]

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

 

[TbonesBlack92GT]

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

 

[91lxntch]

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

 

[TbonesBlack92GT]

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]

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