john mann

Hi, i really would like to run my advanced vacuum on our 67 442 car, it has the l69 tri carb on it, works great, i have the advanced vacuum plugged off, is there anybody out there that can tell me where the hay to plug this in at ??? the last unit i had years ago had the correct olds carbs on it, the center lets just say on the pass side front just a little bit below the bowl at a angle is where it was plugged in and worked just fine, the problem here is i have the parts place carbs, the center doesn't give that provision, so again where to put it, and where did the factory put it ?? any info would be great, thanks john...............

classicmuscle442

Factory spot was on the center carb as you described. Do the parts place carbs have the low backside vacuum ports?

oldcutlass

If your running the stock timing settings, you can just hook it to manifold vacuum and readjust your idle speed accordingly. The engine will idle better and run cooler with the extra timing.

john mann

ok, its great to know, i bought my carbs in 2010 they have made some changes to them, i guess they took the numbers of the end carbs plus some other things that iam not sure of, on my center i just run my pvc valve, the end carbs had no vacuum source, i had to drill the bases out to get vacuum for my power brakes and transmission, thanks for your help john..

john mann

thanks for your response also olds cutlass !! john..........

66-3X2 442

There are no intake manifold vacuum source other than the port he described on the center carb..

66-3X2 442

I have not seen a set of the Parts Place carbs but I have a theory about them. Nothing about them are true OEM tri carbs. In a 66 tri carb,the center carb is smaller in the venturi or fuel bowl than the end carbs by 1/8". I think they are taking other years 2GC carbs and making end carbs and they are not correct as far as size. In other words all 3 carbs are the same size and shouldn't be. The air horn & bases are reproduced but the center section/fuel bowls are not. There were several different models that have a center section/fuel bowl that can be used to duplicate a center carb but as I said,the only correct end tri carb is larger and there not another carb with that size center section/fuel bowl to my knowledge. Another thing,the 66 Pontiac tri power doesn't use the vacuum port on the center cab like an Olds does. They get their vacuum advance from a hollow carb mounting stud.. My guess is they are using Pontiac bases to make the Olds carbs and there is no vacuum provision in the base.. The casting numbers in the center section/fuel bowl will tell if my theory is correct. The casting numbers are different than the carb part numbers. The Olds carb parts numbers are 7026055/7026056/7026057. I have 3 sets of OEM tri carbs that I can check the casting numbers. With a true Olds tri carb,all 3 bases are drilled for vacuum where as the Pontiac only have 2 bases drilled. You can't use the base vacuum for advance because it's unported vacuum and will maintain vacuum on the advance @ all times. You can drill the center carb in the boss to get a source for vacuum as the passage is there. If you do this,you will have to buy an Olds base to get the vacuum to the passage. It could be the base on your carb is already drilled,don't know because I haven't seen one of their bases. I sell a lot of repo Olds tri carb parts including made in the USA bases,not the Chinese units sold by the Parts Place. Does your center carb boss where the vacuum fitting should be look unmolested or does it look like it may be filled with something?

11971four4two

The parts place carbs are random cores they slapped repro bases and tops on. I had some and sent them back or sold down the river

Ignore the tag numbers as the are faked and easy to change

Real Tri Carb Fuel bowls will have casting numbers
7031575 with vacuum port to distributor on center carb
7029683 body of front and rear carbs These are special and specific ... Never had choke and made for tri carb Tripower OLDS Pontiac as far as I know LOL

11971four4two

HEY MISTER

I have several carbs and am thinking about taking the intake I purchased from you off my car
and the carbs and the xtra carbs , stop over again and buy some carbs!!!!
Thinking about something new.... Wink wink

john mann

66-3X2 442 i have to tell you the crap i had to go thru with these parts place carbs, i was talking with mike wasson from the Pontiac tri power team, real nice guy, he told me pretty much everything you have said above, i tore my end carbs down to nothing, sent them to them cuz the venturi size on the ends should be from the factory 1 5/16 the parts place ones were 1 3/16 so they bored them to that 1 5/16 the center is 1 3/16 from the factory, i cant say what these parts place ones are but iam thinking there that 1 3/16 the center carb had the only provision for vacuum so that's were i ran my pcv valve, i had to drill both my ends one for transmission and one for power brakes, the rear one is for my power brakes and my front one is for the transmission, no more parts place carbs for me very disappointing, i bought there back in 2010 there were 1200.00 bucks back then according to them they have taken off all the numbers on the bowls !! and are now over 1500.00 i don't care at the end of the day they are still KA KA to me, 11971four4two thanks for your info yes the 683 casts are for 1964-66 on gto and for our 1966 l69 casting ends were 997 for 63 previous, on weds iam going to go out to our building and take pics of my intake and post them here so you guys can see ok, hey i see your in Minnesota so are we, what all do you have here is my email address johnm442@frontiernet.net thanks to everybody who has replied for me on this website john......

john mann

brian, i just figured it out its you !!!!

11971four4two

Local


All the best
Prices will be HIGH

OLDSter Ralph

I am from Minnesota too

john mann

Awesome !! nice olds !! love the toros also !!~ 66 is my favorite !!

66-3X2 442

OK,that's what I figured. Are the ones Mike bored out the TPP carbs? If so,that's what they are doing,using regular regular 2GC carbs and making tri carb end carbs. I checked their website and they are using the same part # for both Olds and Pontiacs. That's not possible for correctness. They are doing the same thing for the center carb,using other model carbs and making them. In their pictures the center carbs do not have the bowl vent like the OEM carbs. I know Mike Wasson,very nice guy who has helped me a lot.

Run to Rund

Properly done, Tri-Carbs run well. Even with my sorry driving, my 66 has run 11.51 and 118.97 mph. Cobbled up and mismatched, who knows. I got my sets (one sold with #24, one set with #13, one on Rund, one spare) in the early to mid 1970s.

66-3X2 442

Glad to see you're admitting your driving is sorry but I still love you Dad.

john mann

66-3x2 442 i think you mean the parts place carbs, TPP ?? if so yes that's the one mike wasson and the tri power team did for me !

OLDSter Ralph

John is there any connection between you and Fluery & Mann ?

john mann

the best we have done with our olds is 13.34 at 100.44 uncorked with 331 cogs, finally this year were going to put some 373 in there hopefully it will give it some more ump !!

66-3X2 442

T (the)P(parts)P(place) =TPP OK,that was my theory,using other carbs to make tricarbs.

john mann

Gotcha ! and yes those were the ones they did !

john mann

OLDSter Ralph no iam all alone no brothers !!

11971four4two

66-3X2 442

As you probably know,the bowl vent is missing from the air horn and it looks like the boss is missing on the right rear of the base. Also there's an extra vacuum pipe on the rear of the base.

11971four4two

Why would need bowl vent??
IT does have the vacuum for the distributor All important today

66-3X2 442

I am talking correctness.

11971four4two

This pupil is contrary

66-3X2 442

OK,I guess anything that work is OK now.

11971four4two

For my application
1972 a body with 1966 tripe
There were a couple hurdles