Quote:
Originally Posted by darcane
A reasonable estimation for runner length was developed by empirical testing by Chrysler in the 50's. Simplified version is:
N x L = 84,000
N is the tuned engine rpm
L is the length in inches from the opening of the runner to the valve head.
Assuming you have another 2" from port to valve, that gives you 18" for your stock intake manifold. The above equation puts you at a torque peak of 4700rpm based on my assumption. Which probably isn't too far off, Wikipedia puts the peak torque of the Honda Fit's L15A1 engine at 4800rpm
Adding 4" puts you at overall runner length of 22" which gives a peak torque at about 3800rpm.
Adding 10" puts you at overall runner length of 28" which gives a peak torque at about 3000rpm.
Keep in mind this is simplified, but it should be good enough for an estimate. |
With all the description I still don't know what that translates into in the drivers seat, the looking at the geo manifold I wonder what that car feels like? are the tires going to squeal off the line now? Will the auto trans shift late? I assume it will feel a bit choke on the high end, will it affect shifting under a full throttle run (like will it never shift)?
Judging buy the craftsmanship of the people posting, I don't think anyone here is BSing in the least, Im headed to shop to look at how long I can make it using the factory upper.