Summit 1.7 roller rockers
Thread Starter
Le Mans Master
Joined: Jun 2002
Posts: 8,352
Likes: 103
From: In the pit, trying to love someone.
Summit 1.7 roller rockers
http://store.summitracing.com/partde...0&autoview=sku
Anyone running these? They look like a good value, I was just wondering if anyone has tried them before I bought a set.
Anyone running these? They look like a good value, I was just wondering if anyone has tried them before I bought a set.
Last edited by Mike94ZLT1; Oct 8, 2008 at 10:00 PM.
Pro
Joined: Aug 2007
Posts: 619
Likes: 1
From: ATLANTA GA
I dont understand the point of the RR's Ive seen a few of them break off the ball socket right where the pushrod puts all the force to. it seems the stock ones hold up to the pressures of a high lift cam.
Thread Starter
Le Mans Master
Joined: Jun 2002
Posts: 8,352
Likes: 103
From: In the pit, trying to love someone.
I have harland sharp modified stock rockers in my car and while they seem to work fine, I read somewhere, actually Tony Mamo said it, that on higher lift cams they can wear out the valve guides. I figured I could easily get $200-$250 for my HS modified rockers and for $100-$150 more I could upgrade to something I wouldn't have to worry about.
Safety Car
Joined: Apr 2007
Posts: 3,582
Likes: 137
From: SoCal CA
http://store.summitracing.com/partde...0&autoview=sku
Anyone running these? They look like a good value, I was just wondering if anyone has tried them before I bought a set.
Anyone running these? They look like a good value, I was just wondering if anyone has tried them before I bought a set.
Thread Starter
Le Mans Master
Joined: Jun 2002
Posts: 8,352
Likes: 103
From: In the pit, trying to love someone.
I had those on my h/c package. Theyre made by Scorpion, all the same without the warranty. They broke on me in about a month. One fully broke and two more cracked. Spring press and rod length was ok so I called Scorpion and they said they had some "design" problelms. I said forget that and went with Harland Sharps. No problems yet, happy so far.
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Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Once you change anything on the motor, even the stock rockers are not bolt on anymore. Having said that, the Yella Terra are bolt in (not fully adjustable) but you need to set the wipe then measure for the pushrod length. Harland Sharp will be the same method of installation as will the Summit rockers in the first post. Here is how to set the wipe (at least one method). Installation consists of:
1. Set wipe pattern (geometry)
2. Set lifter preload (pushrod length)
Link to setting wipe pattern
1. Set wipe pattern (geometry)
2. Set lifter preload (pushrod length)
Link to setting wipe pattern
Safety Car
Joined: Apr 2007
Posts: 3,582
Likes: 137
From: SoCal CA
The Sharps offer either full or non adjustable. Theyre only a few dollars in difference. Theyre really beefy rockers, I think youll be happy with them.
Last edited by C5Natie; Oct 13, 2008 at 12:56 PM.
Racer
Joined: Dec 2005
Posts: 426
Likes: 0
From: Northern Virginia
The shaft rockers certainly are one impressive and stable design. I don't know any others in their price range that use this set up.
When I first got them they were newly redesigned and a lot of comments were out there on the old ones being too heavy. The opinions have since changed a little on them and a lot more people are running them now.
I wouldn't hesitate to get them again if you couldn't guess... either those or the crane.
Last edited by dmiz0420; Oct 13, 2008 at 03:21 PM.
