Serpentine system with smog
Thread Starter
Heel & Toe
Joined: Feb 2024
Posts: 18
Likes: 3
From: Southern California
Serpentine system with smog
Is the only option for switching a California 1981 Corvette from v-belt to serpentine and retain the smog pump, pulling a system off an old late 80s to early 90s
Camaro/Firebird or buying new from GM? I've contacted March Performance and CVF Racing and neither one makes a system that works with the smog pump.
Thanks
Ken
Camaro/Firebird or buying new from GM? I've contacted March Performance and CVF Racing and neither one makes a system that works with the smog pump.
Thanks
Ken
Race Director
Joined: May 2006
Posts: 18,740
Likes: 2,583
Is the only option for switching a California 1981 Corvette from v-belt to serpentine and retain the smog pump, pulling a system off an old late 80s to early 90s
Camaro/Firebird or buying new from GM? I've contacted March Performance and CVF Racing and neither one makes a system that works with the smog pump.
Thanks
Ken
Camaro/Firebird or buying new from GM? I've contacted March Performance and CVF Racing and neither one makes a system that works with the smog pump.
Thanks
Ken
Thread Starter
Heel & Toe
Joined: Feb 2024
Posts: 18
Likes: 3
From: Southern California
Race Director
Joined: May 2006
Posts: 18,740
Likes: 2,583
This was the GM one I was referring too. https://www.summitracing.com/parts/NAL-19435736
Thread Starter
Heel & Toe
Joined: Feb 2024
Posts: 18
Likes: 3
From: Southern California
Well, the description on the GM performance site for this kit mentions it coming with the "Secondary air injector pump bracket". I'm thinking
that's the smog pump bracket, therefore assuming the system incorporates it. I haven't talked to anybody at GM performance to confirm.
This link has a list that mentions it. https://www.gmperformancemotor.com/parts/19435736.html
that's the smog pump bracket, therefore assuming the system incorporates it. I haven't talked to anybody at GM performance to confirm.
This link has a list that mentions it. https://www.gmperformancemotor.com/parts/19435736.html
Drifting
Joined: Jun 2025
Posts: 1,728
Likes: 600
1981 C3 has a "short vette" pump, Not Long, Not short
Seems that KIT 19435746 includes GM 19201601 Water Pump. Pretty sure that's a LONG pump, and extends much farther forward than your OE C3 pump does.
Seems KIT also includes a new, large diameter Main drive Serp pulley; which also extends much farther forward than OE C3 pulley.
You'll likely find that Serp pulley will interfere with your C3 frame's front crossmember; nearest that Serp pulley.
Also, pump 19201601 is Reverse-ROTATION; your OE clockwise rotation fan blade Cannot work with that, Moreover, the fan blde will also be pushed farther into OE shroud and will Not work efficiently when fan blade isn't properly positioned in relation to shroud opening's "Lip".
Seems KIT also includes a new, large diameter Main drive Serp pulley; which also extends much farther forward than OE C3 pulley.
You'll likely find that Serp pulley will interfere with your C3 frame's front crossmember; nearest that Serp pulley.
Also, pump 19201601 is Reverse-ROTATION; your OE clockwise rotation fan blade Cannot work with that, Moreover, the fan blde will also be pushed farther into OE shroud and will Not work efficiently when fan blade isn't properly positioned in relation to shroud opening's "Lip".
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
