Merge collectors

[Pedigo Perf]

Originally Posted by chassis1

You bring up a very good point with this question. Look at the stocker intake manifolds, do they have the same runner length?? NO!! so when the header builder like Calvin ask you to stagger jet, you ask him why?? Well thats why. Different cylinders will appreciate different tube lengths. Especially in a step header, stagger the steps and watch it pick up power!! The easiest way to see this is with your EGTs on the dyno.... well then again, everybody doesnt dyno...

Carry on.....

Maximizing each cylinders potential is what the fastest engines are best at. The dual plane intake and short/long intake runner ports create a real challenge to this goal. We have been stagger jetting, varying the lash and timing to compensate, as well as having multiple pattern cams of late. Cylinder specific tuned headers has been on my mind, and even suggested as a "cure" for the runner issues several years ago to me by a person who's opinion I respect.

Sneaking up on advancing these combos and with all the R&D that has been exhausted (pardon the pun) over the years, I can't begin to imagine the potential curve balls that await header tube per cylinder tuning. Anybody want to spend a month on the dyno with a header fabricator? That's out of my budget.