Quote:
Originally Posted by morris
For a general running report:
- The car pulls very well once you get over 4000rpm but feels a little 'normal' up to that point. I think this may be a point of view thing and the inaccuracy of my backside dyno rather than anything to do with actual performance, I just expected to be a little scared, and wasn't. I think the swap to a 3 litre M50 stroker or something generally more hefty in the engine dept needs to move up the todo list
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Hi Ian,
whilst pondering the design of my 'standard' BMW 328i exhaust system got me wondering why it is so complex. Why is one header to cat pipe 45mm diameter and the other 50mm? Why is there a crossover after the cats on a straight six engine? Clearly BMW have put a lot of design effort into this exhaust system. I guess performance, emission and sound are all factors they have to consider.
I'm wondering if your custom built 6 into 1 header and single bore Jetex cat is affecting your torque below 4000rpm?
Just food for thought and research on a cold winters night
all the best, Peter