Corvette C1 & Corvette C2 1953 through 1967

notched carbs on tri-power setup why?

Old 10-27-2008, 09:52 PM
Thread Starter
Join Date: Oct 2008
Posts: 1
Default notched carbs on tri-power setup why?

Hi Guys,

I'm new to the forum and posting for my father in law who's "internet challenged".

He was making a deal for the correctly-dated tri-power setup for his 435hp big block '67 roadster. When we saw the parts in person, he noticedthe carbs have been "notched" at the top. Basically a squared-U shapednotch about 3/8" to 1/2" was cut out of the top of each carb'souter body.

I was there but didn't have a camera. I've tried to show it in this random pic from the web. The red lines show the notches. I don't remember which side of the carb had the notch, but each carb had it, only one side, the same side on each.
Name:  holley20tripower20restoration-1.jpg
Views: 9
Size:  15.5 KB

The notch did not look factory because it looked unevenly cut and not exactly the same depth on each, but very close.

Does anyone know if the notchesare factory, or if not, why it would have been done? Is there an old hot-rodder advantage to doing this?

thanks for your help.
Old 10-28-2008, 08:15 PM
Senior Member
Join Date: Jul 2005
Location: Central North Carolina
Posts: 2,105
Default RE: notched carbs on tri-power setup why?

If it helps, I remember some printed (early Xerox) owner-aftermarket "bulletin" that was circulated at GM performance car shows and sports car meets and autcorsses and such in the late 60s that addressed this. It had something to do with pressure/flow equalization at off throttle an owner mod involvoing notching the carbs with a small space that was supposed to do something to driveability off throttle or something. I think I remember it right but frankly I recall it was interesting but unimportant to me at the time I'd didn't own a tri-carb vette although I owned a tri-carb Healey so I paid a bit of attention.

Sorry that I can't remember more. It's been forty years of thereabouts.
Related Topics
Thread Starter
Last Post
Corvette C1 & Corvette C2
01-02-2009 09:24 PM
Corvette C3 Forum
09-11-2008 07:41 PM
Corvette C3 Forum
02-27-2008 09:09 PM
General Tech
08-06-2007 07:32 PM
Parts/Other Sales
05-19-2007 10:43 PM

Thread Tools
Search this Thread
Quick Reply: notched carbs on tri-power setup why?

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.