Cam / Rockers / IC ??

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Oct 10, 2004 | 03:27 AM

#41

macho_mike21

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From: Bloomington-Normal, IL 1997 SE

Quote:

Originally Posted by Rogue

Quote:

Originally Posted by 2000SilverBullet

Rogue - why did you go with the 1.6 ratio ?? What head work would be required to go to 1.7 ratio ?

The 1.9'* were way to much lift with the cam, so it was either back to stock size or get 1.7 adjustables and stage 2 heads (at least stage 2 required for the combo). didnt have the money for the heads so I got the 1.6. If you do rockers you should do the springs, retainers, and rods anyway, the only additional thing you would need with a cam is the timing chain and the cost of the cam/timing chain is about the same as rockers.

We changed the cam in my car without taking out the engine. It IS possible for the 00 year and I would assume for at least the 96-99.

You drop the passenger side of the engine cradle enough to slide the cam out the wheel well.

its not fun (seen a walkthrough online for a GP). Alot easier if you have a lift.

Oct 10, 2004 | 03:41 AM

#42

2000SilverBullet

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2000SilverBullet is on a distinguished road

Quote:

the only additional thing you would need with a cam is the timing chain and the cost of the cam/timing chain is about the same as rockers

Didn't you change your lifters.
You always need to have new lifters with new cams. :o

...and that 1.9 rocker must be real hard on cam shaft and other components wear. The 1.7 would be a better compromise.
Why would you need head work with the 1.7 and not the 1.9 rockers?
As long as your total lift is less than .550" ,,,,,,,,,with the 105 springs and mild cam you wouldn't be over that even with 1.7 ratio. Would you?

Oct 10, 2004 | 08:09 AM

#43

Rogue

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From: Westerville, Ohio 2000 Black SSEi

Quote:

Originally Posted by 2000SilverBullet

Quote:

the only additional thing you would need with a cam is the timing chain and the cost of the cam/timing chain is about the same as rockers

I did not change the lifters. the roller lifters in our cars are not as prone to wearing the cam. I did use the OR rods to help keep the lifters pumpped up and it was not critical that we change them. When I go stage 3 stuff I will end up changing them. The stage 1 cam + 1.7 is fine but the lift of the stage 1X combined with the 1.7 is too much for stock heads.

Oct 10, 2004 | 11:48 AM

#44

2000SilverBullet

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Quote:

By properly machining the heads to handle increased valve lifts, we are able to prevent oil seal and valve guide damage that can be caused by cams with gross valve lifts in excess of .525".

Found that in the INTENSION literature. So .525" lift is the max without headwork. They must machine the spring seats.