HEADER DESIGN PROGRAM

General Engine Specifications
Total Number Of Cylinders in the Engine: 6
Cylinder Bore Diameter 3.800 in.
Stroke Length 3.400 in.

Engine Performance Specifications
Compression Ratio 8.5
Peak Engine Horsepower Measured at the Flywheel 170
Engine RPM at Peak Horsepower 3500
Performance Factor (See Table) 5

Exhaust System Characteristics
Exhaust Port Length in Cylinder Head 2.48 in.
No. of Collected Primary Pipes in One header 3

Calculated Values
Primary Pipe Inside Diameter 1.23 in.
Primary Pipe Length 48.5 in.
Collector Inside Diameter 1.80 in.
Collector Length 14.2 in.
Engine Displacement 231.4 cu. in.

Don't you series one guys have diffrent length exhaust ports?

what do you mean by different length?

If i'm thinking right the two outer exhaust ports are symmetric and the inner port is off center. Wouldn't that inner port be longer than the other two?
If it is than the center primary would have to make up for that.
Right?

Dame the HP peak will be at the top of the rpm band.

We have equal distance exhaust ports, unlike the series II. Our Valves are I E I E I E compared to yours where its like I E I E E I or so.

primary pipe length of over 4 feet?!?!?

That'* backwards.

hehe yeah, ours are the off sequenced ports. Which is why our headers have one that reaches way out . Dame did some measurements, he'll probably pop in here in a few.

Alright cool.
Cause that would suc to have all that money spent on them and have 1 primary throw off the scavanging.
cams/rockers/headers you guys are gonna be flying.

That'* backwards depending on what you're looking at, head or header.

I also said Like.

The series II is nice for modding because there'* an american market thanks to GP'*.