Quote:
Originally Posted by mr2good
Im just curious if you dynoed before the port job and after the port job? Cause to get the proper flow and to know if you actually improved it instead of hurting it, it should be wetflow bench tested right? Alot of peoploe port there stuff and actually hurt it instead of doing good. I think DART heads is the one who pioneered wetflow bench testing cause they found out just doing a flowbench test wasnt accurate enough. Anyone can hog out a head and increase volume, but if it doesnt flow right its not going to help at all Not saying youre doing it wrong or anything just wondering if you actually dynoed before an after to seee the real results?
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Fair questions.
Best result to date is 215.8 bhp using precisely the methods employed here but i didnt build the engine , i just did the heads so ive no way to know whether it was set up correctly or not.
Im expecting to see a fair bit more than this shortly once ive tested a few other things that are currently in the pipeline.
Worst result was 207bhp again, i only did the heads (done to the same spec as the 215.8 heads) and i do know the exhaust system was well below par being a mismatch of pipes and bends etc which couldnt have helped.
Ive never been an advocate of the "hog out" method, indeed, i think i did say at the start that i wasnt going to make them bigger.
Id rather stay with the stock-ish sizes and alter the shape.
Ive actually destroyed two cylinder heads ( on purpose) to test out the results of making them bigger and i gained precisely squat in terms of flow by doing so.
I built my own flowtest bench so id have less guesswork and more hard data to rely on, otherwise i can tell you, id not have put this article up for scrutiny.
The wet flowbench- yeah thats a bit beyond me at the present and since the FE heads arent in any way a race quality item, i dont think going to that extreme is going to get us much on a street engine, but i may be wrong.
Race or drag heads sure, theyre after every last ounce of power so it makes it worthwhile for those guys.