262 vs 267 sbc

[brian schuetta]

I have found a complete 262 in a Monza coupe as I have said on here before. Now for the second time in two weeks a 267 has come through Barney Moravits shop here in San Antonio. The owner will trade this one for a 1 piece crank 305 short block I have. I'm thinking about a IHRA Gt stock co.bo in an 83' Camaro. So that's why I'm asking which one?

[Adger Smith]

The one with the longer stroke & biggest carb.

[brian schuetta]

Then I guess it would be the 267. Funny about the 4 speed Malibu 267 I had a 4 speed 79' 305 that ran like a 267. That car was slow.

[George W]

The 267 cores are also a lil easier to find over the 262

[Billy Nees]

A 262 is basically a 305 with a smaller bore and stroke. If you're set on building a Monza, I would call it a 77 or 78 and put a 305 in it. I think that the extra cubes and stroke would more than offset the 9 HP difference. A Monza isn't an easy or cheap car to do correctly.
The 267 can be used in a 79-83 Malibu or Monte Carlo or 79-81 Camaro. Change some trim and facias on the Camaro and you can run a bunch of different 350s and 305s in it besides the 267(do you see where I'm going here?).
To answer the original question, IMHO, the carb on the 262 is easier to deal with than the Dual-jet on the 267. I think that the 81-83 267@ 150 HP(79-80 are higher) is softer than the 76 262@ 171 HP.
I would do an 81 Camaro with a 267 and find someone smarter than me to deal with the Dual-jet.

[brian schuetta]

The two cars that we have available are a 83' Camaro already setup for a 305 with a 12 bolt and 5.13s, metric 200 trans, etc or a 75 Camaro that is being raced with either my old 305 or a 350. The 83 ran I or J last and was just a 3 to 4 tenths under car. So one car would run in Gt with a 262 or 267 and the other would need a nose change at least and run a 267. Well it's raining for the third day here guess it's time to go get muddy in the junkyard!

[Billy Nees]

Originally Posted by brian schuetta

The two cars that we have available are a 83' Camaro already setup for a 305 with a 12 bolt and 5.13s, metric 200 trans, etc or a 75 Camaro that is being raced with either my old 305 or a 350. The 83 ran I or J last and was just a 3 to 4 tenths under car. So one car would run in Gt with a 262 or 267 and the other would need a nose change at least and run a 267. Well it's raining for the third day here guess it's time to go get muddy in the junkyard!

or you could call your 75 a 76 and run a 305 2V @180.

[brian schuetta]

That would work well and we actually ran it something like that up north but that's another story. Found a v8 Monza hatch back in the yard, missing carb and radiator. That's two v8 Monza's in two yards 10 miles apart.

[Billy Nees]

If they're solid cars, go for it. Monzas are cool!

[Dean Feiock]

Originally Posted by Billy Nees

I would do an 81 Camaro with a 267 and find someone smarter than me to deal with the Dual-jet.

So how does one work around the Dual Jet? Or should I ask how much HP can be made on a carb rated at 287 CFM?

It gets even more interesting if you convert apples to apples. Since a 2BL is flowed at 3 inches vacuum and a 4BL is flowed at 1.5 inches of vacuum, you need to multiply the 2BL CFM by roughly .707 to get a value you can directly compare to a 4BL carb.

So 287 X .707 = 203 CFM

Using a quick online CFM calculator:
267 CID, 5500 RPM, 80% VE........ would need about 350 CFM minimum