[68 TT]

Originally Posted by bojak

68TT thanks for the info. I've read about getting the TBI pressures correct for better effectiveness but that is past my level of mechanical ability, at least for now. I do have a question though. My assumption is that going to an after market unit like a Holley or an edelbrock would address the pressure needing to be adjusted. Is that a correct assumption or would the new unit need adjustment as well? In terms of dollars spent with a goal of fuel efficiency being more important than track performance is the better solution to tune the TBI I got or go replacement? Any input on this would be great.

Don't waste your money on the aftermarket TBI unit if you are after MPG. The only reason for one is to increase air flow into the engine. Their higher CFM rating will make gas mileage worse.

An adjustable fuel pressure regulator is an easy install but you will also need a fuel pressue gauge adapter to know where you are at as the stock TBI system has no test port. Put the adapter on first and see what your stock fuel pressure is at as a baseline. After you know your starting pressure you can install the AFPR and not be completely lost as to where you are pressure wise. It is always good to limit the variables when making changes like this so finding a problem is as easy as possible.
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