66 230 rochester 1bbl dual carb linkage

[TJ's Chevy]

Originally Posted by papaws66

okay thanks. I thought it should, but couldn't find anywhere that it came with it. after looking in the reviews on speedwaymotors.com i found that it does come with a linkage, but the guy said it was junk.. hopefully he just doesn't know what he's doing and i can get it to work! and hopefully the exhaust will give the "wow" factor i want it to! some more power too! would it be beneficial to install a lump port kit? i've read that i could loose some low end torque with that, which i don't want to do..

The lump port kit is very helpful....as far as losing low end torque...you may loose a tiny bit, but your gain will make up for it. A "lump port head" which usually consists of- lump ports, 1.94 intake and 1.60 exhaust valves will in itself give an increase of 35+ hp...add a good cam and you add another 50+ hp. If your going to do lump ports...its well worth it to go to a slightly bigger intake valve...1.84 or the stock 1.72....that'll allow more flow which will give more power...and keeping the stock exhaust valve of 1.50 will keep your low end torque. The stock cam is a super low duration...advertised 230 degrees 196 @ .50 I believe, with .376 lift on a 114 or even a 116 lobe center...perrty much means you'll peak torque at 2500 rpm or less. So yes...lump ports will help...and more compression would to. LPG pistons are available from summit racing...something like $250 for a set of 6..and you'll get around 9:5:1 compression versus 8:5:1. Thus again...more power...if ya want...you can keep an eye pealed on my build thread. I'm hotroding a 292 I6....and in a few weeks my engine will be complete.

[papaws66]

Originally Posted by TJ's Chevy

The lump port kit is very helpful....as far as losing low end torque...you may loose a tiny bit, but your gain will make up for it. A "lump port head" which usually consists of- lump ports, 1.94 intake and 1.60 exhaust valves will in itself give an increase of 35+ hp...add a good cam and you add another 50+ hp. If your going to do lump ports...its well worth it to go to a slightly bigger intake valve...1.84 or the stock 1.72....that'll allow more flow which will give more power...and keeping the stock exhaust valve of 1.50 will keep your low end torque. The stock cam is a super low duration...advertised 230 degrees 196 @ .50 I believe, with .376 lift on a 114 or even a 116 lobe center...perrty much means you'll peak torque at 2500 rpm or less. So yes...lump ports will help...and more compression would to. LPG pistons are available from summit racing...something like $250 for a set of 6..and you'll get around 9:5:1 compression versus 8:5:1. Thus again...more power...if ya want...you can keep an eye pealed on my build thread. I'm hotroding a 292 I6....and in a few weeks my engine will be complete.

lots of great info! thanks!

[old cool]

Just curious. Did GM still use 230's in 1966? I thought the base engine was a 250 inline. That is true of my 66 GMC.

[papaws66]

Originally Posted by old cool

Just curious. Did GM still use 230's in 1966? I thought the base engine was a 250 inline. That is true of my 66 GMC.

my 230 is the stock engine. in 66 chevy had a 230 L6, 250 L6 and 292 L6 and various v8's (not sure what they are, as i don't care to have one in my truck.. lol)