2.5" duals vs single 4"
#1
2.5" duals vs single 4"
As some of you know I'm gathering parts to make a decent little lq9 NA setup. Already have 1 7/8 headers to 2.5" true duals, x pipe, to dual borla pro xs. Will this setup flow well enough for 450whp or do I just need to step up to single 4" and be done?
#4
On The Tree
iTrader: (3)
I've got a regular cab Lq9, 243 heads, and a 230's cam putting down mid 400's on low timing (nitrous tune). I'm running the Kooks 1-7/8's headers into there 3" Y-Pipe now. I've been thinking about swapping out the 3" intermediate pipe to 4" or running dual 3" with an X-pipe. Still unsure if the gains are worth the cost and extra weight...
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#8
It's honesty not as loud as I would hope for it to be. It's way louder inside than it is outside even with the borlas cuz it's dumped. With my magnaflows my wife said you couldn't even hear my truck on the track (which is pretty cool at the same time also)
#9
Formerly ScreamingL
if you plan to grow into exhaust
i did a 1 7/8 into a 3" y pipe into a single 4" exhaust dumped before axle
no restriction on a 6.0....thru a 4000 stall it made 470 rwhp sae same setup uses dual 4" into single 4" feeding the 102mm tb....single 4" showed to be a restriction
i did a 1 7/8 into a 3" y pipe into a single 4" exhaust dumped before axle
no restriction on a 6.0....thru a 4000 stall it made 470 rwhp sae same setup uses dual 4" into single 4" feeding the 102mm tb....single 4" showed to be a restriction
#10
if you plan to grow into exhaust
i did a 1 7/8 into a 3" y pipe into a single 4" exhaust dumped before axle
no restriction on a 6.0....thru a 4000 stall it made 470 rwhp sae same setup uses dual 4" into single 4" feeding the 102mm tb....single 4" showed to be a restriction
i did a 1 7/8 into a 3" y pipe into a single 4" exhaust dumped before axle
no restriction on a 6.0....thru a 4000 stall it made 470 rwhp sae same setup uses dual 4" into single 4" feeding the 102mm tb....single 4" showed to be a restriction