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Alan Roehrich · 06-22-2007, 10:38 PM

For the 69 ZL-1, NHRA lists the Holley R-4296A. Holley lists the R-4296 as an 850 double pumper. Shows a 0.025 primary squirter and a 0.035 secondary squirter, and a 4150 series, with metering blocks front and rear. Shows it to have 1.750 throttle blades and 1.562 venturis. Same carb is listed for the 69 L-88.

The ZL-1 is rated at 445HP by NHRA, and the L-88 at 440HP.

I will say I've seen several carbs for sale listed as L-88 and ZL-1 carbs that ARE vacuum secondary.

Supposedly at least some of the ZL-1 cars were delivered with the R-4346A carb that came of the L-72 427-425HP cars, and the carbs had to be swapped before they could race.

Alan Roehrich

Bring "AA" classes to NHRA Stock Eliminator!

06-22-2007, 10:38 PM	#2
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,118 Likes: 1,573 Liked 1,836 Times in 417 Posts	For the 69 ZL-1, NHRA lists the Holley R-4296A. Holley lists the R-4296 as an 850 double pumper. Shows a 0.025 primary squirter and a 0.035 secondary squirter, and a 4150 series, with metering blocks front and rear. Shows it to have 1.750 throttle blades and 1.562 venturis. Same carb is listed for the 69 L-88. The ZL-1 is rated at 445HP by NHRA, and the L-88 at 440HP. I will say I've seen several carbs for sale listed as L-88 and ZL-1 carbs that ARE vacuum secondary. Supposedly at least some of the ZL-1 cars were delivered with the R-4346A carb that came of the L-72 427-425HP cars, and the carbs had to be swapped before they could race. Alan Roehrich Bring "AA" classes to NHRA Stock Eliminator! __________________ Alan Roehrich 212A G/S