While deciding on 2.5 or 3 inch track system, I called corsa and got some interesting info I didn't know, figured I'd share.
The hp/tq ratings on their web site are for the 2.5" system 15/20 and that's at the wheels.
The 2.5 & the 3 inch system are the same diameter ... this I didn't know. The 2.5 inch is just the 3 inch with a 2.5 inch coupling so it'll bolt to the stock cats, I thought it was 2.5 inches for the whole system, doh.
So as he told me, technically there's no difference in the hp/tq between the 2.5 or 3 inch, the difference is in whether you cat delete or go RT. He said 3 inch RTs could yield about 6hp at the wheels, but that this change is more about temp & sound, so as he put it - if you want to upgrade in stages, doing the 2.5 inch gives you the 3 inch Corsa Track and using 2.5" RTs guestimate half the yield for fun, so 3hp more instead of the 3 inch 6hp.
He also said that this swap would lower side sill temps by 120-150 degrees! Wow, that's almost reason enough to wap right there.
Anyway, thought I'd share the info. It's helped me decide to go forward with my staged plan, Corsa Track with the 2.5 inch coupling (15hp gain), then if I want more sound & even less heat, upgrade to the 2.5 RTs (3hp more).
Dave.
03 SRT
The hp/tq ratings on their web site are for the 2.5" system 15/20 and that's at the wheels.
The 2.5 & the 3 inch system are the same diameter ... this I didn't know. The 2.5 inch is just the 3 inch with a 2.5 inch coupling so it'll bolt to the stock cats, I thought it was 2.5 inches for the whole system, doh.
So as he told me, technically there's no difference in the hp/tq between the 2.5 or 3 inch, the difference is in whether you cat delete or go RT. He said 3 inch RTs could yield about 6hp at the wheels, but that this change is more about temp & sound, so as he put it - if you want to upgrade in stages, doing the 2.5 inch gives you the 3 inch Corsa Track and using 2.5" RTs guestimate half the yield for fun, so 3hp more instead of the 3 inch 6hp.
He also said that this swap would lower side sill temps by 120-150 degrees! Wow, that's almost reason enough to wap right there.
Anyway, thought I'd share the info. It's helped me decide to go forward with my staged plan, Corsa Track with the 2.5 inch coupling (15hp gain), then if I want more sound & even less heat, upgrade to the 2.5 RTs (3hp more).
Dave.
03 SRT