2-barrel Roch Only Questions

[Stan Weiss]

Originally Posted by Mark Yacavone

Don, If you notice, the 2 bbl hp was last lowered in 2002. Many decades after Don Himes' 74 wagon. Also a few years after Danny's experiment. I would guess that someone with a 4 bbl car, had enough of that combo, after Bill Rink got through with it.
They will now run Q/SA and down.
An all out 2 bbl. combo will take a different gear, converter, headers, camshaft, and a different tune up.
With today's technology and available goodies, plus the fact that they've got Ray Charles checking carburetors now, I 'd say a Q/SA Ventura would go at least .5 under. I know it would with a stick.
Not a rocket ship, but should be easy to build, and fairly cheap ( in perspective, that is)

Originally Posted by oldskool

Wow ! So you think somebody ran a 2-barrel '74 Vent, and got NHRA to lower the hp factor. Any idea who that might have been, & how quick they ran ?

I also came up with some more 2-barrel questions. On the Class Racer Info site, the listings for the earlier model Pontiacs list the carb number or numbers, but there are no numbers given for the Venturi size.

So, can somebody here look up those numbers & determine what the venturi size was on 'em ?

http://www.classracerinfo.com/Engine...8&MAKE=Pontiac

http://www.classracerinfo.com/Engine...5&MAKE=Pontiac

http://www.classracerinfo.com/Engine...6&MAKE=Pontiac

http://www.classracerinfo.com/Engine...4&MAKE=Pontiac

http://www.classracerinfo.com/Engine...5&MAKE=Pontiac

http://www.classracerinfo.com/Engine...1&MAKE=Pontiac

http://www.classracerinfo.com/Engine...2&MAKE=Pontiac

http://www.classracerinfo.com/Engine...4&MAKE=Pontiac

http://www.classracerinfo.com/Engine...6&MAKE=Pontiac

http://www.classracerinfo.com/Engine...px?ENGINE=2057

http://www.classracerinfo.com/Engine...4&MAKE=Pontiac

http://www.classracerinfo.com/Engine...5&MAKE=Pontiac

http://www.classracerinfo.com/Engine...2&MAKE=Pontiac

OK. The '74-'76's have one of the 1.25 Venturi carbs, on a 400 engine. The '74 can also use the same #46 heads as the '74 350 engines used. So, might this engine have potential, if you could get the hp factor down some ?

http://www.classracerinfo.com/Engine...6&MAKE=Pontiac

http://www.classracerinfo.com/Engine...8&MAKE=Pontiac

http://www.classracerinfo.com/Engine...5&MAKE=Pontiac

The '74 can also be used in a Bird, as well as the A-bodies & most of the heavier bodies. So, how about this engine in a base model '74 Bird ?

http://www.classracerinfo.com/Engine...px?ENGINE=2086

It obviously wouldn't work at 255hp, since the Q-jet version is only 275hp. Question: How much would the 1.25V 2-barrel slow this engine down, from the Q-jet version, with both built to equal levels ?

At 225hp, a Bird could add a little weight & run P/SA, with a 13.45 index. So, anybody think a '74 1.25V 2-barrel 400 could run 13.45 or quicker ?

http://www.classracerinfo.com/NHRA_Classes.aspx

Stan

[oldskool]

Hey looks like I've already visited this subject.

Oh well, it seems that the same subjects keep coming up, over & over. They are argued about, then dropped, then later, somebody else will start another thread on exactly the same subject.

I suppose it happens on all car forums.

Some will say just "Do a search". But, I've found that on this site, it does absolutely no good to do a search. I've tried many times. Get mostly stuff that has absolutely nothing to do with the subject I'm lookin for.

Just noticed that the '74 2-barrel 400 also can use 88.9cc heads, as well as the 1.25" venturi carb. So, it can have a bigger carb & more compression than the '74 350. MIGHT be a better combo ? But, would need a lower hp factor, than 255, to really be a good combo.

http://www.classracerinfo.com/Engine...6&MAKE=Pontiac

[Mark Yacavone]

1.18 carb is the same size as the 305s ..Some of them are under 180 hp. In U/SA , a Pontiac would have to weigh 600+ pounds more, in the same class.. No thanks..
I didn't even mention the 302 FFFFFFords.

The big inch Pontiacs had a 1,250 carb, I believe. Same as the smog 350 Chevys.
The 69-70 350 Chevys have the big 1.375 carb. That's the one that the restricted circle burners use.
69 Chev 350 2v is good. The 70 is even better... 70 4 dr. Nova should run low 12's in N/SA, with no roll bar , belts ,and monkey suit requirements..
One of the best 2V deals is of the blue oval persuasion, but is stick shift only, and we now know it's harder to win with that extra pedal. ;-)