|
|
|
|
Original Message
|
| RE: Intake manifold suggestions |
| By Dave Shoe - 03/06/2001 1:46:23 AM; IP 216.243.158.49 |
The early intakes may port match, but the low-riser design of the early intake has circuitous and small runners and is just plain stuffy. The old-technology "low rise" intake approaches the head at such a low angle they really DO use the lower portion of the head's port.
The CJ intake is a MR design and it tends to ignore the lower part of the CJ port because the air shot comes from a higher angle and would have to kink a bit if it went down to use the bottom of the head.
You might find a smidgen of a gain in the lower plane of the CJ intake if you brought the manifold port down, but the upper plane has no use for the bottom of the CJ head and would probably just be more turbulent and restrictive if it had access to the lower part of the head's port.
The CJ intake DOES use the entire runner of the head, just not the lower 3/8" of the first half inch or so. Not a perfect marriage, but it sure runs like it is.
One version of the Blue Thunder does have CJ sized runners (sorta like a CJ intake on steroids) and it works really well with CJ heads, but that's a rare exception.
A good-performing single plane intake (i.e.: raised runner type, not the low crap) shouldn't be looking at the bottom 3/8" of the CJ port at all, as all these runners should "straight-shot" into the head without having to "kneel" as it enters.
The CJ iron intake will blow the doors off many aluminum intakes.
To be honest, I have no real concept of air flow technology. This is just my opinion.
Shoe. |
|
|
This thread, so far...
|
|
|
|
Post A Response
|
|
|
|
|
|