|
|
|
|
Original Message
|
| RE. R vs. U |
| By Mike McQuesten - 11/10/2002 6:40:06 PM; IP 63.191.225.29 |
It would be wise for you to search this forum for past discussions/threads that address your question specifically, i.e., C6AE-R vs. -U-, vs. C8AE-H, D2TE-AA, etc. Your question is a good one and has been asked numerous times.
But here's the basics as for differences between the -U- and -R- head:
The C6AE-R is very similar to "early" Non emission FE heads from '58 into '67 including the vaunted C8OE-N CJ head. The -R- head has the tall intake runners and a high-exit exhaust port(5/16" higher than the -U- head. An advantage the -R- head has over the early heads is that they are cast with the bosses that allow a person to run either the "GT, '66-'68 or Improved Performance(IP) '69, exhaust manifolds or they can be drilled/tapped to accept the much better CJ exhaust manifolds.
The C6AE-U head is in the same category as C7AE/A, C8AE-H, D2TE-AA head. They have a short intake runner and a low-exit exhaust port.
My opinion is that the -U- head and its ilk are fine heads for all around street performance where low end torque is desirable for hauling heavy vehicles, i.e., pick ups/trucks etc. The -R- head and its equivalents are better for higher performance |
|
|
This thread, so far...
|
|
|
|
Post A Response
|
|
|
|
|
|