How much Overlap?
Thread Starter
6th Gear
Joined: Oct 2022
Posts: 6
Likes: 2
How much Overlap?
For a Gen V lt1 N/A what would be considered to much overlap for a daily driver? At what point does to much overlap cause drivability issues?
For example cams like TSP VVT-3 vs TSP EL-C7.
For example cams like TSP VVT-3 vs TSP EL-C7.
Last edited by NvAzn; Jan 5, 2023 at 02:35 PM. Reason: wording
Race Director
Joined: Mar 2001
Posts: 19,965
Likes: 6,770
From: Bonneville Salt Flats
In a general sense, apart from electronic controls and other mods, it should be in the ballpark with about any other similarly configured V/8 for any given cam specs (of course, more than simply overlap makes a difference). However, I've found personal tolerance of "driveability" issues varies considerably. Perhaps, those selling the specific cams you are looking at can give you some feedback... or better yet, allow you to "ride along" (having videos) in cars with their products. All the best, in any event. 
Burning Brakes
Joined: Oct 2014
Posts: 1,057
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Maybe too much fun
Instructor
Joined: Sep 2000
Posts: 137
Likes: 44
From: Brunswick NY
My cam has 4.5 degrees of overlap (231/242 116 LSA) I’m Procharged with 10.5:1 compression. I don’t drive the car much but it’s pretty docile to me relatively speaking. The sound is intoxicating for sure.
Drifting
Joined: Jun 2021
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If your doing a cam, you're tuning it anyway.
Burning Brakes
Joined: Sep 2022
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From: MSP
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Pro
Joined: Oct 2021
Posts: 703
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From: Central TX
I chose the TSP Stage 2 over Stage 3 on my M7 Z51 because I wanted to be closer to stock like drivability for my street car. It still has a good lope to it but it's only mildly worse than stock at slow speed. It's definitely more cold natured but once warmed up, it's not bad at all. Mine is locked out so no VVT and it barely lost any torque down low over stock but is much stronger above 3k and carries the torque much further out.
Being a manual helps me as it does have some surging way down low when moving very slowly in a low gear in a parking lot. But, it's not bad at all.
231/235, .645"/.635", 116 LSA
Being a manual helps me as it does have some surging way down low when moving very slowly in a low gear in a parking lot. But, it's not bad at all.
231/235, .645"/.635", 116 LSA