Roush 200 heads

[HotRoddin]

Originally Posted by NOTCH306

96@ .200
103@ .300
163@ .400
193@ .500
212@ .600
216@ .650
Exhaust
134@ .200
211@ .300
234@ .400
236@ .500
241@ .600
242@ .650

This stuff is crazy because some how i lost freakin 37 cfm at .600 on the intake and i really didn't do much of anything to them. after i was coming up with these numbers i thought maybe my orginal flow was high for some reason so i email world and yes they were a little high but by only like 5 cfm no big deal. but at the same time i picked up 76 cfm on the exhaust thats crazy. my intrustor said to me i've been doing this a long time and it just doesn't make any sense that the work done on that intake port would hurt that thing at all. maybe he doesn't know what he is talking about i don't know. i am putting my car back on the dyno here soon to see what happens hopefully that will tell the story. you have to figure though that everything involved in that flow with greatly change when fuel is added into the mix. i will keep you guys posted.
Brian

That makes very little sense ... the last readings really look like you switched the intake and exhaust numbers ????

From everything i've read about these heads, doing almost precisely what you did (a little valve guide work and some general clean up), will increase the out of the box flow numbers about 5 to 10%

Almost like something wasn't right with the bench the last test ?

Keep us posted, i'm interested to see how this plays out.

Rod