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don R · 01-20-2012, 01:39 AM

When I shifted my small block on the stop I had to add 200rpm to 4400. My big block does not mind 4200. It sounds like you have enough power for 4200. watch the stop rpm, if it varies a lot check for vacuum leaks. Don't ask.

01-20-2012, 01:39 AM	#18
don R Member Join Date: Dec 2005 Location: Illinois Posts: 109 Likes: 0 Liked 0 Times in 0 Posts	Re: Shift on time or RPM When I shifted my small block on the stop I had to add 200rpm to 4400. My big block does not mind 4200. It sounds like you have enough power for 4200. watch the stop rpm, if it varies a lot check for vacuum leaks. Don't ask.