rednose RNS10S Donating Members 2,229 Member For: 18y 5m 14d Gender: Male Posted 11/11/13 01:19 AM Share Posted 11/11/13 01:19 AM Twin 2.5 is a restriction at 460hp?Is that engine hp or rwhp?Im at over 560 rwhp and I've seen the twin 2.5 go over 620 rwhp on the Autotech dyno, that car went mid 10 @ 138MPH.How much of a restiction can it be? Link to comment Share on other sites More sharing options...
P_BA_XR6 Member 271 Member For: 16y 7m 29d Gender: Male Location: Castle Hill Posted 11/11/13 08:20 AM Author Share Posted 11/11/13 08:20 AM Look my car still making over 600hp on twin 2.5s. It not efficient once past 460hp as it would be with a twin 3 or 4 in . It would preform better with the larger exhaust as there is more flow. I personally wouldn't worry to much if your car makes it with twin 2.5 but if your starting fresh May aswell go to 4 in or 3.5 in or twin 3 so your prepared for larger hp. I would be more concerned when you have a built motor and pushing the boost through it. Link to comment Share on other sites More sharing options...
P_BA_XR6 Member 271 Member For: 16y 7m 29d Gender: Male Location: Castle Hill Posted 11/11/13 08:21 AM Author Share Posted 11/11/13 08:21 AM Like I said its rough calculation Link to comment Share on other sites More sharing options...
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