The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - How much is too much lift for Cathedral port heads.

Ziegelsteinfaust · 01-29-2022, 10:19 PM

I have 4.88 gears, and run 32" tires. So I can afford to loose some tq if it gives me some faster rpm gain. Typical cruise rpm is 3000.

Depending on what lsa/duration magic a fuel injection system will easily tolerate. Since this will be my first fuel injection project. I don't want to set the bar to high. Depending on Holley vs factory computer which is a better all in option when I start going for the expensive items. I want to run a 110lsa which should be smooth enough for fuel injection, and not limit realistic rpm capabilities.

01-29-2022, 10:19 PM	#4
Ziegelsteinfaust Registered User Join Date: Dec 2012 Location: Temple City Posts: 3,666	Re: How much is too much lift for Cathedral port heads. I have 4.88 gears, and run 32" tires. So I can afford to loose some tq if it gives me some faster rpm gain. Typical cruise rpm is 3000. Depending on what lsa/duration magic a fuel injection system will easily tolerate. Since this will be my first fuel injection project. I don't want to set the bar to high. Depending on Holley vs factory computer which is a better all in option when I start going for the expensive items. I want to run a 110lsa which should be smooth enough for fuel injection, and not limit realistic rpm capabilities.