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1/7/2010 - Charts and Guides

TCI Stall Speed Ratings

This chart from TCI shows stall speed ratings for its converters based on camshaft and rear-axle gear ratios. While the chart is based on TCI's series of converters, the specifications are good general guidelines for those types of converters regardless of manufacturer.

(Chart courtesy of TCI)

TCI Torque Converter Series	Adv. Camshaft Duration	Rear Gear Ratio	Engine Characteristics	Expected RPM	Stall Speeds
				Small Block	Big Block
Sizzler	Stock to 260 degrees	Stock to 3.23	Smooth Idle	1,500 to 1,700	1,000 to 1,900
Saturday Night Special	Stock to 265 degrees	Stock to 3.23	Smooth Idle stock comp. ratio	1,600 to 1,800	1,800 to 2,000
Breakaway	265 degrees to 280 degrees	3.00 to 3.73	Fair Idle mild modification	2,400 to 2,600	2,600 to 2,800
Streetfighter	280 degrees to 300 degrees	3.55 to 4.56	Rough Idle large fuel system raised comp. ratio	3,000 to 3,500	3,400 to 3,800
Super Streetfighter	280 degrees to 310 degrees	3.73 to 4.88	Rough Idle large fuel system raised comp. ratio top end power	3,500 to 4,000	3,800 to 4,200