Quote:
Originally Posted by myillwillinc
headers are here!!!!these are the before pics. then tomarrow i'll get them under the car to measure what i need to do to modify them...
|
Ditto... Your old FRPP's came in over here a couple days ago. I had to port out the insides a bit on the driver side pipe (#4 & #6 cyls) but they look great. I went and stuck my finger down all the pipes and found that the dump for #4 was less than half the size it should be since it merged with the #6 pipe. there was enough interference in the flow path to cause a pretty big power hit. I just took a carbide bit on a dremel and removed the excess. I'll bet all FRPP driver side headers are like this, so if anyone wants detailed pics, let me know.
Oddly enough the #4 and #6 cylinders are the ones I've also seen the most rod breakage on... wonder why.
In any case, the stock iron manifolds do NOT suffer from the same interference fitting as the FRPP shorties so in a head to head comparison if you don't fix the tubes up in the FRPP's I think the stockers will outperform them. After the fix, there should be a little benefit on the shortie side from a pure flow perspective.