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Original Message
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| RE: 390 will not rev!! |
| By Gerry Proctor - 05/13/2004 6:36:01 AM; IP 207.133.188.254 |
I think you're wasting your money by dumping it into a set of rockers. That's not going to solve your problem. Thinking the mechanics of this, you'd have to assume that the iron rockers are flexing. How would they do that?
It's probably a tuning issue and everyone who has done significant modifications has had that problem. But what it is that's limiting you is the hard part.
Does the engine just not rev beyond the 5700rpm or does the power just noticeably fall off? It it quits reving, then you'd likely be looking at a valve control problem. With a hydraulic stick, it could be lifter pump up. It could also be a valve spring installed height problem.
If it continues to rev, just not pull hard past that rpm then you'd have to look at the ignition as well as the fuel system. It could be something as simple as too much advance. It could also be a matter of the float level or *gasp* the throttle not reaching full open position. How about the plugs? With that much squeeze your plugs may be too hot.
Most of the time, this kind of problem can be solved without spending money on expensive parts. It sounds like you've already spent enough on the parts side and need to work on the tuneup side. |
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