View Poll Results: yella terra or harland sharp
yella terra
96
51.89%
harland sharp
89
48.11%
Voters: 185. You may not vote on this poll
yella terra vs. harland sharp..
Originally Posted by Jimbo'sZO6
The new lightweight YT's just bolt right in, no shimming necessary! New Era has them for a great price, under $400, mine have been on since January and no problems whatsoever, and they really did quiet down the valve train.
Jimbo
Jimbo
Perhaps it was only because of the AFR heads?
i already asked one person on the board but does anyone have any before and after dyno numbers to prove a gain revving up to 6k rpm ? (i hate to run over 6) thanks! if less than 5 hp under 6k it wouldnt be worth the cost for me.
TECH Enthusiast
Joined: Jul 2003
Posts: 507
Likes: 2
From: Ankeny, IA
I know this is an old thread, but since I've owned the old style YT's and the Harlands I figured I'd chime in. After installing my TFS heads with the YT's (which I had for years) I took the car to the dyno in Chicago and found that my new heads netted nothing over the old Absolute Speed 241 castings. After a thread in the dyno section on what could be the problem, geometry problems were the main consensus. So after a very generous offer from Mike at TEA I purchased a set of used HS rockers from him. The switch was immediately apparent. The low RPM surging and bucking that I had attributed to the 112 LSA cam (I had been running a 114) was almost completely eliminated. The car felt much smoother in the upper RPM's. I haven't taken the car back to the dyno to see where the power is at, but if nothing else drivability is much improved.
On the flip side the Harlands are not as easy to install and don't feel as solid in construction. I may have been able to shim the YT's to get them to work on my setup, but in the end I'm happy with the Harlands. No headaches, just installed them and they worked as advertised.
On the flip side the Harlands are not as easy to install and don't feel as solid in construction. I may have been able to shim the YT's to get them to work on my setup, but in the end I'm happy with the Harlands. No headaches, just installed them and they worked as advertised.
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I have read of a couple of people who had issues with the Yella Terra's on TFS heads, not sure why but they all switched to the HS and corrected their problems. Seems to be specific to these heads only though as everyone else seems to have had a lot of success with the YT's.
It sounds like incorrect lifter preload, and poor rocker swipe patten in being used as pros and cons compairing these rockers. Witch is a poor argument, I dont know if the YT and HS install at differnt specs. But If you read the YT instructions they come with rocker stand shims, and it walks you thu setting them up. I've also noticed 1st hand they alot sound quiter under the hood.
Originally Posted by studderin
It sounds like incorrect lifter preload, and poor rocker swipe patten in being used as pros and cons compairing these rockers. Witch is a poor argument, I dont know if the YT and HS install at differnt specs. But If you read the YT instructions they come with rocker stand shims, and it walks you thu setting them up. I've also noticed 1st hand they alot sound quiter under the hood.
So let me understand this. There are two different Yella Terras on the market, an older version, which is heavier, and the new version which is lighter. I just want to make sure everyone is talking about the same thing and not comparing apples to oranges with the YT's. I'm guessing the newer, lighter ones are the preferred choice.
