1.7 Rockers with E303 cam???

J

jimilane

Founding Member

Aug 20, 2001

158

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17

Raleigh, N.C.

Aug 13, 2005

#1

• Aug 13, 2005

• #1

I have a set of 1.7 roller rockers.
The stamped rockers on one head are worn and need replacing.

You guys think the stock (NEW) springs will hold up to the extra lift...somewhere around .530 lift???

Well.....I think probably not.....but is anyone running an E303 with 1.7s on stock heads with stock springs...??

Jim

 

stang8urimport

Autozone Junkie

Founding Member

Jun 21, 2002

1,499

12

59

Daytona Beach, FL

Aug 13, 2005

#2

• Aug 13, 2005

• #2

If you like valve float and spring binding, GO FOR IT!!!

 

J

jimilane

Founding Member

Aug 20, 2001

158

0

17

Raleigh, N.C.

Aug 14, 2005

#3

• Aug 14, 2005

• #3

I didn't think it would be a good idea. But I wanted to see if anyone had tried it. I bet it wouldn't idle very well. But I wonder how close the vavles are getting to the pistons...???

I'm going to get some 1.6 roller rockers Monday.

I put some stock rockers off another engine on tomight thought. I got rid of most of the problems. Just one rocker is ticking now.

It seems that if a set of rockers gets worn in with the stock cam pretty good...changing the cam to an E303 makes the valves run on different parts of the rocker...then there is a little ridge and the rockers will tick.

Amazing find...

 

D

Dangerfield23

New Member

Aug 14, 2005

18

0

0

El Dorado, Arkansas

Aug 14, 2005

#4

• Aug 14, 2005

• #4

I'm running an E303 in mine, and I have a set of 289 heads on it. I would definitely recommend heavy duty valve springs. I have double springs, and I had to get some good roller rockers because I was breaking the stock rockers in half.

 

S

spchernandez

New Member

Jun 18, 2005

28

0

0

Aug 14, 2005

#5

• Aug 14, 2005

• #5

i am running a E303 cam and the Cobra energizers 1.7 roller rockers and heavy duty springs from Crane Cams, and the stang is running strong, no valve floating and i have flat top pistons too and there is enough clearance to run the cam and roller rockers

 

J

jimilane

Founding Member

Aug 20, 2001

158

0

17

Raleigh, N.C.

Aug 15, 2005

#6

• Aug 15, 2005

• #6

Dangerfield23 said:

I'm running an E303 in mine, and I have a set of 289 heads on it. I would definitely recommend heavy duty valve springs. I have double springs, and I had to get some good roller rockers because I was breaking the stock rockers in half.

Click to expand...

That's interesting.......where were the rockers breaking exactly. Were they cracking at the bottom where the pivot is? I just want to know where to look.
I have the stock spring on there right now, so cracking one might not happen to me right now, but I guess I might have to put some more stuff on the engine it looks like.

Thanks for the INFO!!!

Jim

 

R

racerraj

Founding Member

Dec 17, 2001

493

32

39

Dickson, TN

Aug 15, 2005

#7

• Aug 15, 2005

• #7

You are going to want better than stock springs even with the 1.6 ratio and the E-Cam.

 

T

TheSlowLX

New Member

Jul 7, 2004

44

0

0

Aug 15, 2005

#8

• Aug 15, 2005

• #8

Im running crane 1.7rr's and the e-303 with stock springs. Have had this for more than a year and seems to be working fine.

 

jbj454

New Member

May 10, 2005

44

0

0

Aug 15, 2005

#9

• Aug 15, 2005

• #9

!

I'm running GT40 heads with the springs that came on them, with E303 cam and Cobra 1.7rr Car runs good. I also have a stock bottom end.

 

J

jaradt2006

New Member

Nov 2, 2010

4

0

0

harlan ky

Nov 2, 2010

#10

• Nov 2, 2010

• #10

ive got a 91 lx non roller 302 ive got a 520 lift cam in it along with 289 heads that have been shaved 14 thousands i am wanting to run 1.7 roller rockers will it work or do i need to stick with my 1.6

 

G

grainboy

Member

Feb 2, 2006

140

0

17

Goodyear, AZ

Nov 2, 2010

#11

• Nov 2, 2010

• #11

I swapped 1.6 for 1.7 comp roller tip rockers, and could not tell any difference at all. plus I had to get longer pushrods to get the rocker centered on the valve. I ended up putting the stock 1.6's back on.