Just curious if anyone ever flowed ls6 heads square port closed chamber 2.19 1.88.
I have a set worked and just curious what they might have been stock.

The 990's or 188's were flowed by CHP and it's in their database if you can find it. Since they changed the online format, I can't seem to find squat there anymore.

Hope this site helps??

http://www.users.interport.net/s/r/srweiss/tablehdc.htm#BBChevy

pdq67

990's Intake / Exh
Lift
100 200 300 400 500 600
69/53 125/103 183/140 233/176 264/198 292/204


188 intake / exhaust
Lift
100 200 300 400 500 600 700
65/45 128/90 188/131 233/170 259/188 291/195 313/200

hope this helps,, I am sure there is some give / take here.