Today I ran into an interesting debate on a turbo diesel forum. One member is trying to a custom exhaust manifold for his triple turbocharged setup ...
The debate is about weather or not pulse tuning will help improve the spool of the larger third turbocharger ... the turbo in question is a larger Holset VGT turbo with a non divided exhaust housing ...
This debate can be found here and it reminded me of a previous test done by full race on a turbo Civic of theres where they did a back to back dyno comparison of a log style exhaust manifold vs a ramhorn equal length manifold ...
Those results are here:
If you look closely at the results , you can see that the log style manifold (solid line) makes slightly more power before 4000 rpms while the equal length manifold makes much more peak power from starting from 5000 rpms upwards...
Considering this turbo diesel is a high boost, low rpm (3200) setup, I agree with the guy that's saying just run the simplest log style you can build and it will be fine... on this application pulse tuning is overkill and you won't ever get to a point where you utilize it...
Posted by Horsepower Calculator via gmail 
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