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fredscarryall · 06-17-2018, 01:14 AM

The rebuilt tbi runs a lot better now. I think my bushings on the throttle shaft were a little worn out even with my low miles.The tbi was prone to this when I worked at a chevy dealership in the early 90s. It has Better throttle response, starts up a lot faster and idles smoother. With the 3 lbs of fuel pressure increase I notice a slight power increase. I would recommend removing the tbi internal fuel regulator and putting in an external one with a Manuel gauge just because it’s a lot easier and quicker to adjust. Whenever I rebuild my bottom end I want to do a 496 also. Are you planning on Boring out your tbi to 54 mm and having tbiparts rebuild it.

06-17-2018, 01:14 AM	#131
fredscarryall Registered User Join Date: Feb 2010 Location: gresham oregon Posts: 806	Re: Fastfreddys 454ss The rebuilt tbi runs a lot better now. I think my bushings on the throttle shaft were a little worn out even with my low miles.The tbi was prone to this when I worked at a chevy dealership in the early 90s. It has Better throttle response, starts up a lot faster and idles smoother. With the 3 lbs of fuel pressure increase I notice a slight power increase. I would recommend removing the tbi internal fuel regulator and putting in an external one with a Manuel gauge just because it’s a lot easier and quicker to adjust. Whenever I rebuild my bottom end I want to do a 496 also. Are you planning on Boring out your tbi to 54 mm and having tbiparts rebuild it.