December 19, 2007 - Time for a fun job.
The engine just isn't performing the way it should. At higher rpm, it's choking off. So it's time to replace the Racing Beat header (designed for a 110 hp car) with one a little more robust.
I had a very interesting conversation with an E Production racer, and he shared his header specifications with me. Yes, I know, they should be scientifically matched to my cams and port lengths and everything else. But an E Production Miata is the closest thing out there to my car, so I figured I'd take advantage of their knowledge base and see if uncorking the exhaust does anything at all. If so, I'll make another with a little more specificity.
31" primaries with a 1.75" tube size, right then. The first step is to get a collector. These are expensive - but a bit of searching turned up this beauty. Edelbrock makes merge collectors with 1.75" inlets for only $90 or so, street price. Sure, they're not as pretty as the $300+ units, but I can cope with that. Especially when it turns out the $90 price is for a pair!
Nice. Now all I need to do is figure out how to stuff all those big pipes underhood. The EP guys gave me some ideas there as well...
tags: header |
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