Some "Dime Rockets" for the 4TH! - Page 38

Billy Nees · 02-06-2014, 08:35 AM

Quote:

Originally Posted by joe huestis

Been looking at some of these U/SA combos such as the late 70's Camaro with the 305-2V and the 80's combos with the 267-2V . At 180 HP vs. 150 for the 267 is it worth carrying the extra 600 lbs. with the 305 ? Which is the better combination and what other chevy combos may be the way to go for U ?

Joe, IMHO, I think that it's a wash. Personally, I don't like towing around heavy cars. The 2G carb is a bunch easier to deal with that the Dual-Jet.
You could just do a Camaro and get both 78 and 81 facias and run both!

Dwight Southerland · 02-06-2014, 12:55 PM

'76 Chevelle is an interesting choice. With it you can run the 305 2bbl in U, but also have the option of 350 2bbl, 350 4bbl and 400 4bbl if you decide to make a career with the car. The '75 Chevy II 262 is another option for U.

Billy Nees · 02-06-2014, 01:30 PM

Quote:

Originally Posted by Dwight Southerland

The '75 Chevy II 262 is another option for U.

The thing that I don't like about the 75 262 is that it gets the small 2G(1.09vs.1.18). Now if NHRA would give it back all of the HP that the 76 motor has gotten on it well..........

Ron Middleton · 02-06-2014, 02:18 PM

Dwight,
I've been talking with Billy about such a combination as I have a near original 1976 Chevelle Laguna S3 in the shop now. Original 305 car

Dwight Southerland · 02-06-2014, 02:36 PM

Quote:

Originally Posted by Billy Nees

The thing that I don't like about the 75 262 is that it gets the small 2G(1.09vs.1.18). Now if NHRA would give it back all of the HP that the 76 motor has gotten on it well..........

?? '75 is 165 w/automatic, '76 is 171 w/automatic.

Billy Nees · 02-06-2014, 03:51 PM

Quote:

Originally Posted by Dwight Southerland

?? '75 is 165 w/automatic, '76 is 171 w/automatic.

I thought that there was more of a difference than that(what happens when you ASSume). The Nova was only available with 262 in 75 W/ small carb. I think that I'd rather have the 267 @ 150 HP if I had to take the 1.09 carb, even 165 is too much. 300 lbs. difference in U.

Mark Yacavone · 02-06-2014, 03:53 PM

Quote:

Originally Posted by joe huestis

Been looking at some of these U/SA combos such as the late 70's Camaro with the 305-2V and the 80's combos with the 267-2V . At 180 HP vs. 150 for the 267 is it worth carrying the extra 600 lbs. with the 305 ? Which is the better combination and what other chevy combos may be the way to go for U ?

Almost have to go with an 82 Monte 267...That's a lot of weight difference for sure.. Not quite in the Ford 302 range though.
For some reason though, the 1.21 Dual Jet doesn't seem to work as good as the 1.18 2GC ???

Dwight Southerland · 02-06-2014, 04:38 PM

Quote:

Originally Posted by Mark Yacavone

For some reason though, the 1.21 Dual Jet doesn't seem to work as good as the 1.18 2GC ???

It might have something to do with the 2GC having 1.686" throttle bores.

Mark Yacavone · 02-06-2014, 05:07 PM

Kinda what I was thinking...Not being an engineer, I don't know if one restriction in a carb over rides the other or vice versa..
Could have something to do with the booster/ venturi cluster being bigger in the Dual Jet...Seeing its part of the bowl casting, you are stuck with it.
Take a look at what some of the fast 4 GCs are using...

Dwight Southerland · 02-06-2014, 06:52 PM

Yes . . . what some are doing.

Back in the day of modifieds, they would use the body of a Holley list 4224 660 cfm carb fitted to an 850 double pumper base plate. The carb body would be reamed from the bottom to match the 1 3/4" size of the throttle bores. Voila! The new "blended" carb would flow in the 750-775 cfm range, but keep the small venturis for crisp throttle response and high quality fuel atomization for under 300 cu in engines. I suspect the difference between a 1.686"/1.093" carb and a 1.686"/1.186" carb would not be as great as one would fear.

02-06-2014, 12:55 PM	#372
Dwight Southerland VIP Member Join Date: Dec 2001 Location: Arkansas - In the middle of everything. Posts: 1,999 Likes: 64 Liked 772 Times in 192 Posts	Re: Some "Dime Rockets" for the 4TH! '76 Chevelle is an interesting choice. With it you can run the 305 2bbl in U, but also have the option of 350 2bbl, 350 4bbl and 400 4bbl if you decide to make a career with the car. The '75 Chevy II 262 is another option for U.

02-06-2014, 02:18 PM	#374
Ron Middleton Member Join Date: Jan 1970 Location: Jackson, Ms. Posts: 350 Likes: 183 Liked 12 Times in 4 Posts	Re: Some "Dime Rockets" for the 4TH! Dwight, I've been talking with Billy about such a combination as I have a near original 1976 Chevelle Laguna S3 in the shop now. Original 305 car __________________ #4892 J/SA. We are what we repeatedly do. Excellence then, is not an act, but a habit.” - Aristotle Last edited by Ron Middleton; 02-06-2014 at 02:18 PM. Reason: spelling

02-06-2014, 05:07 PM	#379
Mark Yacavone Veteran Member Join Date: Mar 2002 Location: Miles From Nowhere Posts: 7,807 Likes: 2,897 Liked 5,109 Times in 1,947 Posts	Re: Some "Dime Rockets" for the 4TH! Kinda what I was thinking...Not being an engineer, I don't know if one restriction in a carb over rides the other or vice versa.. Could have something to do with the booster/ venturi cluster being bigger in the Dual Jet...Seeing its part of the bowl casting, you are stuck with it. Take a look at what some of the fast 4 GCs are using... __________________ "We are lucky we don't get as much Government as we pay for." Will Rogers

02-06-2014, 06:52 PM	#380
Dwight Southerland VIP Member Join Date: Dec 2001 Location: Arkansas - In the middle of everything. Posts: 1,999 Likes: 64 Liked 772 Times in 192 Posts	Re: Some "Dime Rockets" for the 4TH! Yes . . . what some are doing. Back in the day of modifieds, they would use the body of a Holley list 4224 660 cfm carb fitted to an 850 double pumper base plate. The carb body would be reamed from the bottom to match the 1 3/4" size of the throttle bores. Voila! The new "blended" carb would flow in the 750-775 cfm range, but keep the small venturis for crisp throttle response and high quality fuel atomization for under 300 cu in engines. I suspect the difference between a 1.686"/1.093" carb and a 1.686"/1.186" carb would not be as great as one would fear.