Aluminum cylinder heads

-
Can I send you a private message?
B3RE said:
My point is, I haven't ground on a rocker arm in at least 15 years, including the PRW stainless rockers. I have used dozens of sets on in-house builds, and sold many more sets to customers without issue, including on E-street heads. Why? Because, as was mentioned previously, correcting geometry eliminates symptoms of poor geometry, such as fitment interference, or excessive sweep. Just because the rocker does or doesn't clear the parts around it is not an indicator of whether the rocker is good or bad.

Frankly, the Harland Sharp and Mancini rockers you are promoting are some of the worst when it comes to its design engineering. I've made corrections to many sets for customers, but haven't used them, or any copies of them, for quite a few years. There are better choices for the money.

In summary, you say there was something wrong with the rockers, and I say there was something wrong with the stand location in the cylinder head, regardless of the roller rocker arms used. Imagine having the benefits mentioned in the tech articles, if the shafts had been relocated.
Click to expand...
 
B3RE said:
My point is, I haven't ground on a rocker arm in at least 15 years, including the PRW stainless rockers. I have used dozens of sets on in-house builds, and sold many more sets to customers without issue, including on E-street heads. Why? Because, as was mentioned previously, correcting geometry eliminates symptoms of poor geometry, such as fitment interference, or excessive sweep. Just because the rocker does or doesn't clear the parts around it is not an indicator of whether the rocker is good or bad.

Frankly, the Harland Sharp and Mancini rockers you are promoting are some of the worst when it comes to its design engineering. I've made corrections to many sets for customers, but haven't used them, or any copies of them, for quite a few years. There are better choices for the money.

In summary, you say there was something wrong with the rockers, and I say there was something wrong with the stand location in the cylinder head, regardless of the roller rocker arms used. Imagine having the benefits mentioned in the tech articles, if the shafts had been relocated.
Click to expand...
The rockers I am using are bushed. They're not the needle bearing type. What are the design problems with the Mancini and Harland Sharp rockers?. I've never had an issue out of the Mancini rockers yet. I don't claim to be a genius when it comes to the ins and outs of rocker geometry. I just install everything , check the spring height, set the rockers up til they're properly proportioned on the tip of the valve. Make sure the pushrods are of correct length. Check coil bind and seat pressure. Is there something I'm over looking?.
 
SuperStock426 said:
The rockers I am using are bushed. They're not the needle bearing type. What are the design problems with the Mancini and Harland Sharp rockers?. I've never had an issue out of the Mancini rockers yet. I don't claim to be a genius when it comes to the ins and outs of rocker geometry. I just install everything , check the spring height, set the rockers up til they're properly proportioned on the tip of the valve. Make sure the pushrods are of correct length. Check coil bind and seat pressure. Is there something I'm over looking?.
Click to expand...
I would have to say yes. If you read through the tech articles IQ52 linked to, it will be apparent what real geometry is. Roller position is mostly meaningless.
 
B3RE said:
I would have to say yes. If you read through the tech articles IQ52 linked to, it will be apparent what real geometry is. Roller position is mostly meaningless.
Click to expand...
I've read parts 1 and 2.. Interesting.. I'll finish the rest of the articles tomorrow.
 
You must log in or register to reply here.
-

Back
Top