1.7 Rockers
Posting Guru
Joined: Dec 1999
Posts: 1,903
Likes: 2
From: Copley, OH
I disagree completely. The high lift rockers function approximately the same as putting in a mild RV cam. They increase torque throughout the stock RPM range without really adding any RPM on top end. Figure about 5-7 ft-lbs throughout the entire RPM range of your engine.
Since the 1.7s are full roller rockers, they will decrease side loading on the valve stems and guides. The higher lift will work the valve springs a bit harder but nothing to worry about/
Since the 1.7s are full roller rockers, they will decrease side loading on the valve stems and guides. The higher lift will work the valve springs a bit harder but nothing to worry about/
New User
Joined: Dec 2003
Posts: 15
Likes: 0
1.7 rockers
I had installed a set of these on my 5.0 with a stock roller cam. They will increase the valve lift of a stock cam about 0.030". I'm sure they were worth a few HP and ftlbs torque, but you will need a dyno run to see it. My seat-o-pants meter felt no change in power.
I later went with a crane compucam and 1.6 ford racing rockers, and felt a good increase in thrust with the seat-o-pants meter.
I later went with a crane compucam and 1.6 ford racing rockers, and felt a good increase in thrust with the seat-o-pants meter.
Posting Guru
Joined: Dec 1999
Posts: 1,903
Likes: 2
From: Copley, OH
But the roller tips eliminate virtually all of the side load on the valve stems that you get from a normal rocker; therefore there's less wear on the guides. The geometry from the rocker pivot point to valve is identical to stock, the difference is all on the pushrod end of the rocker. It is shorter, operates at a slghtly greater mechanical disadvantage and causes greater lift for the same cam input.
Trending Topics
Thread Starter
|
Junior User
Joined: Dec 1999
Posts: 62
Likes: 0
From: Gothenburg Sweden
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Posting Guru
Joined: Dec 1999
Posts: 1,903
Likes: 2
From: Copley, OH
5-7 ft-lbs. across the board is "not much" of a gain? That's not just a peak number, that's throughout the complete RPM range of the engine. Where else are you going to pick up that kind of performance gain with a relatively simple and inexpensive bolt-on?
Senior User
Joined: Aug 2003
Posts: 207
Likes: 0
From: Chicagoland
It's not THAT easy to do, escpecially if you have a late model car/truck. I had to remove one of my valve covers to get out a tap I dropped into it (don't ask), and I had to remove the coil pack, upper intake, heater hoses, and all kinds of other crap just to get them off. took me about two hours to tear down and replace. It's not very hard, just time consuming.
Thread
Thread Starter
Forum
Replies
Last Post
derbydad276
335 Series- 5.8/351M, 6.6/400, 351 Cleveland
2
Mar 13, 2014 07:55 PM
cjben
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
4
Mar 15, 2009 12:20 PM
lmd91343
1987 - 1996 F150 & Larger F-Series Trucks
3
May 5, 2008 08:55 AM
460rollback
Performance & General Engine Building
19
Nov 21, 2003 07:49 AM
