Need a new carb for my '70 cst/10

[dr07]

have a 1970 CST/10. 350ci, bored 30 over, no ac, no pb, no ps.

I'm assuming that I don't have an electric choke being as there is no wire, but their is a rod coming up from the coil spring located on the intake manifold.

What type of Edelbrock carb do I need and what type/accessory choke to purchase?

Thanks in advance for any and all help.

[chevy72blu]

Since you want an Edelbrock..

Summit part # EDL-1405. 600 cfm, manual choke. $265. The 1406 has an electric choke if you want to convert it, but theres no reason to really. That rod is the mechanical choke- it is open when the motor is closed, and as the intake heats up, as does the coil attached to the rod. It expands, and closes the choke. Basically, theres not a damn thing wrong with the design and it will never break.

[ed2552]

I have heard nothing but trouble about Edelpuke carbs, get a holley or demon, they are much better

[chevy72blu]

Personally, I am a Holley guy, and advise strongly against Demons unless you personally enjoy troubleshooting and tuning. For a mild street driven motor, Edelbrocks work great and get good mileage( better than a Q-jet for most drivers due to the size of the primaries) out of the box.

A good ol Q-jet is hard to beat in terms of price and availibility. Hell, I have 2 laying around in my garage that I doubt I'll ever use.

This of course is all useless, as he didnt ask for any one's opinions

[ed2552]

Yeah, but everyone i know that has an Edelbrock hates it, it is more tuning than a Demon

[53lowdown]

Originally Posted by chevy72blu

Since you want an Edelbrock..

Summit part # EDL-1405. 600 cfm, manual choke. The 1406 has an electric choke if you want to convert it, but theres no reason to really.

I like the electric choke.. Had the manual initally and it was a pain especially in cooler weather trying to keep the engine running until it warmed up. Go with the 1406 with the electric choke. I added the electric choke to my 1405 and it works like a charm. All you need is a keyed 12v wire.

[ksbeatty]

I have had good luck with my Edelbrock. i prefer the Holly I use to have. But go with an electric choke it is easy to run a power wire and a ground from the fuse box.

[Steelawork'n]

I like the Holley with the manual choke. However, I have never had to use the choke for I live in an area with a mild climate. I tuned it in less than 5 minutes with a vacuum gauge and was off and running. Just make sure you get all the gas fittings and adapters for your intake.

Oh, you might just want to change to an aluminum intake. You'll be glad you did.

[ratpackv8sonly]

I got the stock Q-jet on my 383 stroker with the thermal choke and it works great. I had a Holly for a while but it didnt perform as well in town as my q-jet does as a daily driver.

[El Jay]

Originally Posted by chevy72blu

Since you want an Edelbrock..

Summit part # EDL-1405. 600 cfm, manual choke. $265. The 1406 has an electric choke if you want to convert it, but theres no reason to really. That rod is the mechanical choke- it is open when the motor is closed, and as the intake heats up, as does the coil attached to the rod. It expands, and closes the choke. Basically, theres not a damn thing wrong with the design and it will never break.

Actually, the choke is closed when the engine is cold. As the engine warms, the bi-metal spring opens the choke.

[dr07]

so far, I have gathered that I want a 1405, have a thermal choke, and need some plug offs and fittings.

good stuff guys, keep it coming.

[Billla]

This appears to be a stock Q-jet manifold, so a spread-bore carb is required. A 1405/1406 is a square-bore carb and will not fit without an adapter - which you don't want to use. You can do a manifold swap for "bling", but with an otherwise stock engine there's no performance benefit.

Your best option is likely an aftermarket new or overhauled Q-Jet, or one of the Holley 4175 Q-jet replacement carbs. IMHO, the 4175 is an often-overlooked carb - all the tuneability of a Holley but it bolts right on in place of the Q-Jet. I am frankly not a fan of Q-Jets for other than stock engines as in my opinion and experience they are very difficult to tune - especiallly for someone not familiar with them. Opinons differ.

As for the "brand wars", I'll make my standard comment that ANY carb that's working correctly, sized correctly and is correctly tuned will work perfectly. Holley Street Avengers and Edelbrock Performers are typically closest on a tune out of the box; Demons (even Road Demons) and "racing" Holleys are typically way off.

IMHO, electric chokes if adjusted correctly are trouble-free.

[imholte]

Billla why do you not want to use the adapter? I am curious since I have an 1406 and had to use an adapter to get it to fit. Any performance issues? It will be coming off when I rebuild the engine.

[Billla]

Using the adapter's not a big deal, but I have had difficulties getting them to seal :/ Buy brand-name vs. the parts store no-name cheapies...which are typically NOT flat (Spectre is the worst offender here - junk IMHO).

From a performance perspective, there could be some very, VERY small benefit as it acts as a spacer and so extends the runner length. I'd expect the flow disruption would outweigh any potential benefit such that it's a wash. OK as a short-term approach (makes perfect sense in your case) but problematic on a long-term daily-driver.

[mrein3]

When I built my 383 I went with all Edelbrock stuff. New 1406 carb, new 2101 intake. Then I purchased an adapter that did two things. It made the carb work on the intake and insulates the carb from the heat. Apparently some folks have had trouble with fuel boiling without the adapter.

I literally bolted the thing on there and did not touch it. It is running a tad rich but again, I heard that is common and can be tuned out. Some day.

As far as other brands, I had one bleeping Holly. I have heard on these pages that people have had LUCK with them but I never personally met somebody that doesn't proceed the work Holly with some bleeping comment. I called mine my Holly lawn sprinkler because it always leaked some where.

Quadrajets are good until the throttle shaft gets sloppy. All used ones have sloppy throttle shafts. You can get a new quadrajet for $400. Or a new 1406 that works out of the box for $200 + tax.

[chevy72blu]

Since he specifically asked for an Edel carb, I assumed he had a square bore intake. I should have made the connection to the choke rod, however.

Why not pick up a used Edel Performer RPM intake on evilBay at the time you do your swap? You'll pick up a few ponies, really improve the overall look of your motor, and make the vacuum fitting differences very strait forward. It will give you some breathing room if you ever decide to go with a better cam/heads, as well. That way, no more worries about the adapter or having to go with a 4175 (which looks pretty cheap, used, actually). Just throwing out some more ideas

[dr07]

Yeah, I forgot to mention that I had round not square.

[dr07]

Ok, bought the 1406. I got the adaptor plate. I now have 2 problems so far.

My throttle linkage is way too long now. Stock ones even after being screwed in full adjustment is still a few inches long.

There also seems to be a vacuum port on the back of my original q-jet. There is no place for this vacuum on the 1406. Where do I need to hook this line to?

Is there an adaptor kit/new rod that I didn't get?

Any help is appreciated.

[hensonjd]

Would the holly street avenger perform well on a stock 350?

[Indyuke]

Take the time to learn how to tune a q-jet, and put one on that has had a quality rebuild with new throttle shaft bushings. They've got a snappier throttle response than an Edelbrock and better mpg. I went from a Edelbrock 1406 back to the stock q-jet, and my fuel economy went from 14mpg to 17mpg. Plus at 750cfm, they flow more than the 1406, and will give the engine much more than it could ever use.

*Edit* oops. Sorry. I didn't read your last post. Schucks, Napa or Carquest has a throttle control kit. I forgot what place, it's been a couple of years. Or you could cut yours down and rethread it. Don't know about the vacuum port. On my q-jet it's the PCV tap. I've seen some guys even use them for their bake booster.

[LockDoc]

Originally Posted by ed2552

I have heard nothing but trouble about Edelpuke carbs, get a holley or demon, they are much better

I'm taking my Road Demon Jr. off... I'm tired of screwing with it. It was even sent back to the factory shortly after I got it because it ran way to rich. Now after you drive the car and it sits for a while it won't start because the engine is flooded...

LockDoc

[truckdude239]

go with Edelbrock, or a good reman4 bbl qjet. i installed a qjet on my 305 in ym 71 and it runs like a dream. hit the gas and it takes right off

[hvychve]

one barrel, convert your intake to a one barrel and save gas

I am partial to originality myself, a good built rochester is for me, I ran holleys and edelbrocks , have had em all with different characteristics in em each, still like the rochester quadrajet

[dr07]

Originally Posted by dr07

Ok, bought the 1406. I got the adaptor plate. I now have 2 problems so far.

My throttle linkage is way too long now. Stock ones even after being screwed in full adjustment is still a few inches long.

There also seems to be a vacuum port on the back of my original q-jet. There is no place for this vacuum on the 1406. Where do I need to hook this line to?

Is there an adaptor kit/new rod that I didn't get?

Any help is appreciated.

...back on topic....

[dr07]

Originally Posted by dr07

Ok, bought the 1406. I got the adaptor plate. I now have 2 problems so far.

My throttle linkage is way too long now. Stock ones even after being screwed in full adjustment is still a few inches long.

There also seems to be a vacuum port on the back of my original q-jet. There is no place for this vacuum on the 1406. Where do I need to hook this line to?

Is there an adaptor kit/new rod that I didn't get?

Any help is appreciated.

anyone?