TRI POWER experts-Please help.
Thread Starter
Instructor
Joined: Dec 2001
Posts: 150
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From: Montreal Quebec
TRI POWER experts-Please help.
Are there any differences....any differences at all.....between the 67 427/435 TRI POWER carbs I have.....and 68 or 69 427/435 TRI POWER carbs....thanks for the help.
Rick.
Rick.
Team Owner
Joined: Oct 2000
Posts: 38,897
Likes: 1,926
From: Washington Michigan
The front and rear carbs are all the same for 67-8-9 435's, but the center carbs are different; 67's used R3660A (3902355), and '68 used R4055A (3925517) early and R4055-1A (3940929) late, and '69 also used the R4055-1A. 
Le Mans Master
Joined: Aug 2009
Posts: 5,474
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From: Houston Texas
St. Jude Donor '10-'12-'13
John, I hope I am not wearing you out here? What physical differences were there on the later center carbs?
Thread Starter
Instructor
Joined: Dec 2001
Posts: 150
Likes: 0
From: Montreal Quebec
Thank you for taking the time to post a reply. I'm sorry I was not more clear.....aside from the numbers difference....of which I was aware, and which was the reason for my question....are there any physical differences in the 67, 68 and 69 center carbs of 435 horse Corvette carbs....thanks for the help.
Rick.
Rick.
Le Mans Master
Joined: Aug 2009
Posts: 5,474
Likes: 16
From: Houston Texas
St. Jude Donor '10-'12-'13
Thank you for taking the time to post a reply. I'm sorry I was not more clear.....aside from the numbers difference....of which I was aware, and which was the reason for my question....are there any physical differences in the 67, 68 and 69 center carbs of 435 horse Corvette carbs....thanks for the help.
Rick.
Rick.
Race Director
Joined: Nov 2002
Posts: 12,142
Likes: 54
From: Taylor Michigan
They looked the Same
Up until a few months ago I had 3 complete sets with intakes and a extra new center carb....They all looked the same to me except the date codes but each set matching each other....The new one is a Holley replacement carb and I presume without the GM numbers and letters on the air horn...its still in its Holley box for L71`s
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Michael S. Palmer
Team Owner
Joined: Oct 2000
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From: Washington Michigan
Thread Starter
Instructor
Joined: Dec 2001
Posts: 150
Likes: 0
From: Montreal Quebec
Thanks John,
I very much appreciate your taking the time to provide this information. Would you think it worthwhile to modify the 67 center carb to the specs of the 69 center carb? Thanks again for the help.
Rick.
I very much appreciate your taking the time to provide this information. Would you think it worthwhile to modify the 67 center carb to the specs of the 69 center carb? Thanks again for the help.
Rick.
Le Mans Master
Joined: Aug 2009
Posts: 5,474
Likes: 16
From: Houston Texas
St. Jude Donor '10-'12-'13
Intermediate
Joined: Feb 2009
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Depends on your engine specs with respect to jet size, power valve, accel pump cam, and squirter size. Also sec carb spring choice.
Might want to read this post for some addt'l info.
http://forums.corvetteforum.com/engi...potential.html
Might want to read this post for some addt'l info.
http://forums.corvetteforum.com/engi...potential.html
Team Owner
Joined: Oct 2000
Posts: 38,897
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From: Washington Michigan
