Blower Cam
04-08-2016, 10:42 AM
#13
TECH Apprentice
That 2.5 upper and 10% OD is going to put you into the 20 PSI range (if it doesn't slip) and your exhaust being restrictive will make that number go UP not down. I run a 10% OD lower and a 3.3 upper and am in the 10-11 PSI range. My cam is a 219/234 on a 118+6 from BTR and I made 518 RWHP.
04-08-2016, 11:21 AM
#15
That 2.5 upper and 10% OD is going to put you into the 20 PSI range (if it doesn't slip) and your exhaust being restrictive will make that number go UP not down. I run a 10% OD lower and a 3.3 upper and am in the 10-11 PSI range. My cam is a 219/234 on a 118+6 from BTR and I made 518 RWHP.
wow 20psi!! maybe ill swap the stock lower balancer back. would it be better to go to a 4 inch exhaust? or true 3 inch duals? since I already have headers
04-08-2016, 12:49 PM
#17
TECH Apprentice
As far as the exhaust is concerned, both flow about the same with (2) 3 inch pipes having about 10% more total flow area. It is probably more of preference and packaging that would dictate an answer. I think a single 4 is likely a lot easier to fit.
04-08-2016, 01:08 PM
#19
TECH Apprentice
04-08-2016, 02:19 PM
#20
The stock damper should drop you back 2-3 psi, but will still be north of 15 PSI.
As far as the exhaust is concerned, both flow about the same with (2) 3 inch pipes having about 10% more total flow area. It is probably more of preference and packaging that would dictate an answer. I think a single 4 is likely a lot easier to fit.
As far as the exhaust is concerned, both flow about the same with (2) 3 inch pipes having about 10% more total flow area. It is probably more of preference and packaging that would dictate an answer. I think a single 4 is likely a lot easier to fit.
So is it better on take the 3 inch off the Y pipe and straight to a 4inch exhaust straight back? And thanks for the advice. Also would a 4 inch intake be enough to feed the blower?