RGS Corsa Silencers

[Paul Marx]

I was hoping to improve performance by drilling those 4 holes in a set of not real tidy Lamfrancie seamed mufflers and then that bigger outlet size was mentioned, this was maybe 20 years ago on one of the forums back then. I think 32mm dia to 38mm but don't quote me. My mufflers were the smaller outlet size. Get your tape measures out and confirm this, easy fix.

 

[Laverdalothar]

The power-restriction is not the size of the outlet of the muffler I believe. My Jota has 32mm outlets and puts out 110HP and equal torque. Even the 3-1 Exhaust I have on the SFC 1000 has just something like 35 mm (and that is a single outlet compared to 2 x 32mm f.e.). It still produced 105 HP with original Engine, unopened (compared to 95 roughly with the original Exhaust). I even had an original RGS exhaust system on it and it still produced with the same configuration something like 94HP. So - I don't think the size of the outlet does influence the Power really much. The torque-curves though were totally different (and also the power curve on the 3-1 system, built by SR-Racing)...

If you want to free up power and especially torque (!!) on an RGS Corsa or 1000 SFC, forget the original system. It is made for controlling emissions and not for optimal power.

 

[Vince]

Me liky, Speed Holes.