Quote:
Originally Posted by form74
I picked up at least 2 tenths by changing to 3 inch exhaust than 2 1/2 from the mufflers than to the tail pipes which were 2 1/2 then I switched out the tail pipes to 3 inch and picked up another 1 tenth.
|
Your mufflers are 3 inch in and out then???? Or 2 1/2 in and out with necked down pipes
I run 3 inch to the mufflers necked down to 2 1/2. With 2 1/2 full tails…..
I have mandrel bent new tails 2 1/2 to install
__________________
 1973 Firebird Navajo Orange w/shaker,1973 400/461,1972 Intake SD CNC'd,1977 Q-Jet 800 CFM w/ Cliffs Kit,Tanks Inc PA4 255 Walbro intank pump ,-8an feed/return,RobbMc Regulator,RobbMc 40 micron filter,253 CFM 6x-8's w/H.S 1:5 Roller Rockers,SD Stump Puller H/R Cam 230/236 @.050 112 lobe separation 565/.570 lift,Crower Solid Rollers,28150 Hedman Headers,3" exhaust,full tailpipes,350 Turbo,9.5" 3200 Converter,3:42 gear,8.5 posi,C/E slide-alinks,Koni adj frt shocks,Best 12.18@110.55 Lookin for 11's
Last edited by cnc; 11-10-2021 at 08:35 AM.
|