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rfmaster · 09-13-2010, 04:03 PM

a good summary from my friend TT.

I also would like to add that Vortec heads can handle about 32 to 34 deg of timing at WOT whereas swirl heads commonly used on LO5 make peak power with about 20 deg at WOT - that's a huge difference! So just swapping from swirls to vortec heads timing tables must be up updated to take advantage of vortec flow capability. Vortec head chamber design stems from famed LT1 development minus reverse cooling.

//RF

09-13-2010, 04:03 PM	#1
rfmaster Registered User Join Date: Oct 2003 Location: OC CA Posts: 1,374	Re: TBI perfomance options??? a good summary from my friend TT. I also would like to add that Vortec heads can handle about 32 to 34 deg of timing at WOT whereas swirl heads commonly used on LO5 make peak power with about 20 deg at WOT - that's a huge difference! So just swapping from swirls to vortec heads timing tables must be up updated to take advantage of vortec flow capability. Vortec head chamber design stems from famed LT1 development minus reverse cooling. //RF __________________ "The Beast" 1975 Chevrolet C20 longbed 350/700R4! with 3inch body lift Dual Flowmasters Super 40's! TBI retrofit completed (2007-07-29) New 383CID (+030) 08-304-8 9.5:1CR x36,005 (2012-12-17)