E-Tec 200 cylinder heads and rocker arms?
#1
Senior Member
Thread Starter
Join Date: Jun 2000
Location: Glenbeulah, WI
Posts: 599
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1988 Firbird
Engine: 406
Transmission: T-56
Axle/Gears: 4.10
E-Tec 200 cylinder heads and rocker arms?
I have just purchased a set of used E-TEC 200 cylinder heads and I need to know what rocker arms these heads are designed for. The heads have 1.45 diameter springs on them and the springs interfear with the stock rockers and the comp cams roller tipped rockers that I have. The interfearance is very small and it occurs between the top coil on the spring and the side of the pivot ball on the rocker. When I puch the spring back on the retainer to take up the clearance it no longer has interferance but when the engine is running I am sure the spring will move around enough to slightly hit the rocker. The springs and retainers are a matched set that are correctly installed, so that is not the problem. Does anyone know what rockers will give me the most rocker to valve spring clearance?
Thanks
Thanks
#2
Supreme Member
Join Date: Jul 1999
Location: Loveland, OH, US
Posts: 18,457
Likes: 0
Received 15 Likes
on
15 Posts
Car: 4
Engine: 6
Transmission: 5
Sounds to me like (a)your push rods are too short; and (b) you have the wrong retainers, since with the correct retainers, the top of the springs would be positively located.
What parts do you have (besides the heads)?
What parts do you have (besides the heads)?
#3
Supreme Member
Join Date: Aug 2002
Location: Mesa, AZ: Transplanted from Chicago, IL
Posts: 1,824
Likes: 0
Received 0 Likes
on
0 Posts
You might want to read this: https://www.thirdgen.org/techbb2/sho...hreadid=130868
I have E-Tec 170s with the Jegs extruded alluminum rockers, no probs. I am running Comp 987s @1.800"
I have E-Tec 170s with the Jegs extruded alluminum rockers, no probs. I am running Comp 987s @1.800"
#4
Supreme Member
Join Date: Apr 2003
Location: Bonner Springs, KS
Posts: 1,751
Likes: 0
Received 4 Likes
on
4 Posts
Car: 1995 Corvette
Engine: LT1
Transmission: 6 spd Manual
Axle/Gears: Dana 44, 3:45:1
I have E-Tec 200 Cylinder heads on my GTA... When I built the motor, I measured valve train geometry and determined that I needed a 0.1" longer than stock pushrod (what edelbrock said, but I wasn't gonna spend all that money without checking, plus it was a good learning experience).. So that's 0.100" longer than the stock roller lifter pushrod (which is shorter than your standard hydraulic flat-tappet sbc pushrod)...
Oh, I had crane roller rockers on there for quite a while with no interference (aluminum 1.6 ratio, not the gold ones), but I went back to the stock rockers (don't shoot me.. ) because they were too noisy... Someday I'll get some comp steels.
Oh, I had crane roller rockers on there for quite a while with no interference (aluminum 1.6 ratio, not the gold ones), but I went back to the stock rockers (don't shoot me.. ) because they were too noisy... Someday I'll get some comp steels.
Last edited by thirdgen88; 03-29-2004 at 01:53 PM.
Thread
Thread Starter
Forum
Replies
Last Post
ambainb
Camaros for Sale
11
04-25-2016 09:21 PM
NinjaNife
Tech / General Engine
27
08-23-2015 11:49 AM