CHANGING INTAKE ROCKERS>>>>

Reply Subscribe

Thread Tools

Search this Thread

Jan 24, 2002 | 07:55 AM

maticam

Thread Starter

Racer

Joined: Oct 2001

Posts: 339

Likes: 0

From: Harrington delaware

CHANGING INTAKE ROCKERS>>>>

WOULD THERE BE ANY GAIN IN PERFORMANCE BY DOING THIS??? I HAVE BEEN TOLD I WOULD GET 26 hp AND SOME TORQUE??? DON'T SOUND LIKE THAT WOULD HAPPEN >>> WHAT DO YOU THINK>>>

Jan 24, 2002 | 09:08 AM

nevrenuf

Melting Slicks

Joined: Aug 1999

Posts: 2,540

Likes: 2

From: Milwaukee WI

LS1Edit Guru

Cruise-In I Veteran

Cruise-In II Veteran

Cruise-In III Veteran

Re: CHANGING INTAKE ROCKERS>>>> (maticam)

I'm not too sure about the 26hp claim but you would pickup noticeable power. I am assuming you are referring to a rocker arm change to a 1.8:1 ratio versus the stock 1.7:1 rockers. In making this change, you will increase net valve lift by 5.8% or approximately .030" on a stock cam. Duration will not be affected. You will likely want to do both the intake and exhaust rockers.. especially if you have relatively stock exhaust (i.e. no headers)...

Jan 24, 2002 | 09:42 AM

maticam

Thread Starter

Racer

Joined: Oct 2001

Posts: 339

Likes: 0

From: Harrington delaware

Re: CHANGING INTAKE ROCKERS>>>> (nevrenuf)

How much do a set of 1.8 cost>>> i was told about $700.00

Jan 24, 2002 | 11:24 AM

Redvette_22

Le Mans Master

Joined: Jul 1999

Posts: 5,005

Likes: 38

From: jackson nj

Re: CHANGING INTAKE ROCKERS>>>> (maticam)

If you plan to keep the "stock" style rockers, contact SLP as they now have in stock the stock rocker custom made in a 1.85 ratio. HOWEVER, make sure you have the proper piston to valve clearance before doing this change. Otherwise you will have an unexpected result !

Jan 24, 2002 | 11:27 AM

maticam

Thread Starter

Racer

Joined: Oct 2001

Posts: 339

Likes: 0

From: Harrington delaware

Re: CHANGING INTAKE ROCKERS>>>> (Red98C5)

My engine is stock >>>> do i still have to check??

Jan 24, 2002 | 11:29 AM

TLewis4095

Le Mans Master

Joined: Aug 2001

Posts: 8,145

Likes: 1

From: Bradenton FLORIDA

Re: CHANGING INTAKE ROCKERS>>>> (maticam)

Check the forum mall....I think around $500-600 for the entire kit. It includes springs, (you need stronger springs) keepers, intake & exhaust rockers, etc.

Changeing out the springs with the heads on is a little tricky...you will need an air compressor and the adaptor to connect the air hose through the spark plug hole . This keeps the vaves from dropping as you release the keepers.

Jan 24, 2002 | 11:34 AM

TLewis4095

Le Mans Master

Joined: Aug 2001

Posts: 8,145

Likes: 1

From: Bradenton FLORIDA

Re: CHANGING INTAKE ROCKERS>>>> (maticam)

I'm pretty sure the 1.8's will be fine in any stock cam application...and the 1.85's should, but the concern is valve piston interferance at high RPM's if they float even a slight bit...crunch! :eek: Thus the stronger valve springs are a must! Again, verify with SLP or other manufacturer.