The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 02-18-2016, 12:00 AM   #1
ekneen
Registered User
 
Join Date: Jan 2016
Location: Somerville, MA
Posts: 28
Tri Power a '77 Chevy 454

I'm currently working on my mutt of a 1969 K10 running a 1977 454. In the carb category, I have the quadrajet it came with that could use a good rebuilding and on the other hand a GM header and holley tri-power carb off of a '69 Corvette 427.

Anyone here have experience running a tri-power on a big block? Thoughts on tri-power vs q-jet? Given the truck is a mutt I could care less about numbers matching, stock, etc.
ekneen is offline   Reply With Quote
Old 02-18-2016, 03:15 AM   #2
andrewmp6
Registered User
 
Join Date: Jan 2009
Location: Louisville,Ky
Posts: 5,811
Re: Tri Power a '77 Chevy 454

If its a daily driver i would run one carb sized to the needs of the engine,If its a more a toy i would run 2 4 barrels on a tunnel ram if you got the room.
andrewmp6 is offline   Reply With Quote
Old 02-18-2016, 11:40 AM   #3
77 ChevySport
Registered User
 
Join Date: Oct 2010
Location: Central, IL
Posts: 201
Re: Tri Power a '77 Chevy 454

Quote:
Originally Posted by ekneen View Post
I'm currently working on my mutt of a 1969 K10 running a 1977 454. In the carb category, I have the quadrajet it came with that could use a good rebuilding and on the other hand a GM header and holley tri-power carb off of a '69 Corvette 427.

Anyone here have experience running a tri-power on a big block? Thoughts on tri-power vs q-jet? Given the truck is a mutt I could care less about numbers matching, stock, etc.
ekneen:Just a word of caution>67-69 3x2 Int. Manifolds came 2 ways. Round Ports(Which I suspect you got) and Rectingular Ports for the High Horse engines which will not work with your heads. I would keep the Quadrajet for drivablity and less leaks. (All Holleys leak in good time)JMHO-Larry
77 ChevySport is offline   Reply With Quote
Old 02-18-2016, 11:47 AM   #4
truckin 79
Registered User
 
Join Date: Jun 2014
Location: CO
Posts: 727
Re: Tri Power a '77 Chevy 454

I read a article a long time ago that tested 4 barrel vs tripower and the 4 barrel out performed the tripower every time. Tripower is the coolest looking set up IMO but for less headache a 4 barrel is the way to go.
__________________
79 Chevy 2wd BIG10 350 TH400
truckin 79 is offline   Reply With Quote
Old 02-18-2016, 01:36 PM   #5
Tom
driving is in my blood
 
Tom's Avatar
 
Join Date: Dec 1999
Location: Mesa AZ
Posts: 5,687
Re: Tri Power a '77 Chevy 454

tri-power on a 4wd?
__________________
-78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle.
-98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes.
-02 Suburban 4x4: leveled front
-CBR600F4i, CBR600RR, CBR1000RR, and standup skis
DISCLAIMER: I cant spell for the life of me.
Tom is offline   Reply With Quote
Old 02-18-2016, 10:33 PM   #6
ekneen
Registered User
 
Join Date: Jan 2016
Location: Somerville, MA
Posts: 28
Re: Tri Power a '77 Chevy 454

Quote:
Originally Posted by 77 ChevySport View Post
ekneen:Just a word of caution>67-69 3x2 Int. Manifolds came 2 ways. Round Ports(Which I suspect you got) and Rectingular Ports for the High Horse engines which will not work with your heads. I would keep the Quadrajet for drivablity and less leaks. (All Holleys leak in good time)JMHO-Larry
Thanks for the word of caution. I should have started there. Port mismatch indeed. Qjet it is!
ekneen is offline   Reply With Quote
Old 02-19-2016, 10:19 AM   #7
slotard
Registered User
 
Join Date: Nov 2014
Location: Alameda, CA
Posts: 877
Re: Tri Power a '77 Chevy 454

I don't know how much a stock smog dog truck engine would take advantage of that much carb either. I'd much rather have a tiny bit less potential but easy to start and tune than a race engine in a truck.
__________________
1973 C20, 350/350
slotard is offline   Reply With Quote
Old 02-19-2016, 05:09 PM   #8
1968vetL-71
Junior Member
 
1968vetL-71's Avatar
 
Join Date: Jun 2004
Location: Murfreesboro, Tn
Posts: 1,092
Re: Tri Power a '77 Chevy 454

If I read that right u only have 1 tri-power carb?
If that's the case, u will not like buying the other 2 and the intake. Better off selling it in eBay to a corvette guy and staying with the 4bl.

A 67-69 L-68 or L-71 tri-power setup when tuned correctly is a thing of beauty. Problem is guys back in the day didn't know how to tune properly and most setups were removed in favor of a simplified 4 barrel.
__________________
1969 impala conv 427 #s loaded. dad bought new
1969 "Judge" RA-3, rare warwick blue/white, #'s
1968 vet convertible #s 427/435 tripower (sold)
1968 belair 2door post #s 427/385
1936 ford 5w coupe dads 1st car
1969 camaro ss (17,xxx) miles

Wanted: 69-72 suburban project, 69 camaro convertible. also any big block cars. 69-70 gto judge project.
1968vetL-71 is offline   Reply With Quote
Reply

Bookmarks

Tags
454, k10, tri power, tri-power

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 02:02 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com