which rockers

myslo50

Member

Jun 12, 2006

247

3

18

ohio

Sep 7, 2006

#1

• Sep 7, 2006

• #1

i know by putting 1.7rr on a stock cam will increase the lift to 480, will the idle still stay the same or will it be a little choppy. will it be worth putting thoes rockers on my car will there be a noticeable difference.

is there any special mods i got to do if i buy the for install. like shims,longer pushrods,will the springs bind up, taller valve covers?

and who has them on a stock cam and if u like them?

 

myslo50

Member

Jun 12, 2006

247

3

18

ohio

Sep 7, 2006

#2

• Sep 7, 2006

• #2

anyone?

 

Strype

Cuthbert catcher

Founding Member

May 11, 1999

61

34

104

Huntsvegas, AL

Sep 7, 2006

#3

• Sep 7, 2006

• #3

I've only heard...

I've heard that they add only 5hp or so

 

eagleautosports

New Member

Jul 7, 2006

139

0

0

Mebane NC

Sep 7, 2006

#4

• Sep 7, 2006

• #4

They won't change the idle quality because it doesn't increase the duration, only the net valve lift. It'll pick up only so much power because of the heads. If you're planning on more mods later on, you can go with them as long as any cam you get has the ratio on consideration.

 

afast93stang

Founding Member

Jan 6, 2002

1,407

4

39

North Texas

Sep 7, 2006

#5

• Sep 7, 2006

• #5

When I did my 1.7 Cobras it did have a slightly different sound to it. To the average person on the street it wont sound significantly different.

 

willys1

Active Member

Dec 2, 2003

1,004

1

36

New Jersey

Sep 7, 2006

#6

• Sep 7, 2006

• #6

I have 1.7 RR's with Thumper heads and a stock cam. Idles the same just gives you more breathing up top! I wouldnt do it on stock heads though.

 

R

ratrapp2

New Member

Jun 24, 2005

121

0

0

Sep 8, 2006

#7

• Sep 8, 2006

• #7

i just put a set of 1.72s on my car with a b cam.my stock valve covers hit on the sides and i had to buy a set of fms valve covers to clear them.you might have to shim them if you have too much lifter preload but on my gt-40x heads they were fine.stock cobra rockers might clear because they are slighty more narrow than most aftermarket rockers.my cars sounds a little different but i felt alot more power because cam lift went from .480 to .515.i think it's worth the effort,especially if you have a stock cam.

 

T

Topdowncruise

New Member

Apr 7, 2005

207

0

0

Canada

Sep 9, 2006

#8

• Sep 9, 2006

• #8

I believe they do increase duration slightly so your idle may change a bit.

 

eagleautosports

New Member

Jul 7, 2006

139

0

0

Mebane NC

Sep 10, 2006

#9

• Sep 10, 2006

• #9

The rockers increase lift only, it doesn't add degrees. I've been to UTI and have studied valvetrain dynamics and the increase in power is fromt he additional lift.

 

8

8950HO

New Member

Mar 31, 2005

658

2

0

Sep 10, 2006

#10

• Sep 10, 2006

• #10

Crane Cams tech department said adding 1.7 rockers would provide the effect of adding an extra 1 or 2 degrees of duration to the cam on a stock 5.0L.

 

T

Topdowncruise

New Member

Apr 7, 2005

207

0

0

Canada

Sep 10, 2006

#11

• Sep 10, 2006

• #11

8950HO said:

Crane Cams tech department said adding 1.7 rockers would provide the effect of adding an extra 1 or 2 degrees of duration to the cam on a stock 5.0L.

Click to expand...

The Comp Cams guy told me the same thing when I got my cam.The guys from Crane and Comp Cams obviously don't study at UTI.

 

sawbones25

Founding Member

May 29, 2001

1,318

1

38

Virginia

Sep 10, 2006

#12

• Sep 10, 2006

• #12

There were no idle changes when I put 1.7's on some ported E7's.

 

mob

the guy who hits on his mom

20+ Year Stangneter

Oct 3, 2003

2,566

136

104

Dallas, TX

Sep 10, 2006

#13

• Sep 10, 2006

• #13

Wont the higher lift only come into play as the rpms go up? Im sure you wont notice a difference, and idle wont change. If you have aftermarket heads, cam, or valve springs, its a nice little mod to upgrade your engine, I wouldnt expect feeling a gain.

 

eagleautosports

New Member

Jul 7, 2006

139

0

0

Mebane NC

Sep 11, 2006

#14

• Sep 11, 2006

• #14

One to two degrees wouldn't make enough of a difference to have a real seat of the pants feel. I don't claim to know everything so it's cool guys. Besides, UTI wasn't all that great anyway so I wouldn't be surprised to have been misled by them. They only want your money and boy howdy did they get it.

 

352Ford2

New Member

Oct 12, 2005

393

0

0

Seattle,WA

Sep 11, 2006

#15

• Sep 11, 2006

• #15

http://www.compcams.com/Community/Articles/Details.asp?ID=153327675

read this