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Old 05-17-2011, 04:40 PM   #1 (permalink)
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302 2 barrel intake manifold? 1969

I am new to building cars and naturally I have lots of questions one at the moment is what is a nice intake manifold to look into? What are gains I can get out of nice intakes, and what are some good ones for this particular engine?
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Old 05-17-2011, 06:03 PM   #2 (permalink)
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Re: 302 2 barrel intake manifold? 1969

a stock type 4 bbl intake with a small 4 bbl carb will add some performance, but to really make a show you need to match your intake, carb, heads and cam.
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Old 05-17-2011, 06:18 PM   #3 (permalink)
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Re: 302 2 barrel intake manifold? 1969

There are dozens of things to consider when buying an intake manifold. If you're running a stock low compression engine with mostly stock drivetrain and are only looking at an intake upgrade I'd say a Edlebrock Performer, not the Performer RPM.

You'll need a dual plane manifold that makes power in the idle to 5000 RPM range. Bigger is not better when it comes to intakes. A manifold designed for high RPM on a stock, or nearly stock engine will perform worse, not better.

If you're swapping cams, adding headers, higher compression, bigger carb, etc. the RPM would be the better choice. Look at the intakes advertised RPM range and use that as your guide. Keep in mind that an aluminum intake will shave off several pounds too which is always a good thing, not to mention easier on the back to install.

You'll also need a good four barrel carb. If you're stock, or mostly stock I'd say go with a Holley 600 CFM with vacuum secondaries. That carb will grow with you if additional upgrades are in the future and won't be too big for what you have now.

I hope this helps.

John
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Last edited by 65FalconLover; 05-17-2011 at 06:20 PM.
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Old 05-17-2011, 07:32 PM   #4 (permalink)
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Re: 302 2 barrel intake manifold? 1969

So what you guys are saying is that i should definetly switch it to a 4 barrel carb? I heard doing that will bog down the engine since it was made for the 2 barrel, or will tuning the engine after that, fix it?
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Old 05-17-2011, 08:02 PM   #5 (permalink)
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Re: 302 2 barrel intake manifold? 1969

Is your engine a stock 69 2bbl 302?

What car did it come in?

We need as much info as you can give us for us to lead you in the right direction.
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Old 05-17-2011, 08:51 PM   #6 (permalink)
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Re: 302 2 barrel intake manifold? 1969

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Originally Posted by Mckinnon View Post
So what you guys are saying is that i should definetly switch it to a 4 barrel carb? I heard doing that will bog down the engine since it was made for the 2 barrel, or will tuning the engine after that, fix it?
It'll make a little more power with a better intake and small 4 bbl carb but it's more of a "package" thing that makes the big changes. By that I mean having everything working together. An engine is basically an air pump, the more that comes in and is pumped out effeciently the more power it makes.

The intake I mentioned is designed for a low to mid modified motor. It would help to have a more free flowing exhaust - something along the lines of dual 2" or 2 1/4" pipe with performance mufflers and an open type air filter but those aren't required. A small 4 bbl carb set up may even increase your fuel mileage when you're not hot rodding it. Also, be sure your ignition system is in good working order.

Other than that you'd be fine with what you're talking about.
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Old 05-18-2011, 03:47 AM   #7 (permalink)
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Re: 302 2 barrel intake manifold? 1969

look into the autolite carbs too. Cheap and cheap to rebuild and super easy to tune.

Performer (or Performer RPM), 4v carb, headers and it should wake her up a bit. Add some gears and you will have some fun!
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Old 05-18-2011, 12:39 PM   #8 (permalink)
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Re: 302 2 barrel intake manifold? 1969

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Originally Posted by Mckinnon View Post
So what you guys are saying is that i should definetly switch it to a 4 barrel carb? I heard doing that will bog down the engine since it was made for the 2 barrel, or will tuning the engine after that, fix it?
Nobody said definetly . give the specs of the vehicle and power train. correct 4 barrel carb/intake wont make it bog
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Old 05-18-2011, 08:06 PM   #9 (permalink)
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Re: 302 2 barrel intake manifold? 1969

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Nobody said definetly . give the specs of the vehicle and power train. correct 4 barrel carb/intake wont make it bog
It is a stock 1969 torino, 2 barrel 302, and c4 tranny, it sounds good already, because its a nice old v8 but what can i do to give it an edge? Exuast im sure, but what are good ones out there?
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Old 05-18-2011, 09:17 PM   #10 (permalink)
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Re: 302 2 barrel intake manifold? 1969

Like an intake, exhaust design depends on several things too. Are you trying to keep the noise down, do you want it loud or something in between? Are you planning on a drive-in cruiser, weekend racer/street machine or all out performance?

It also depends on your motor plans, now or in the future. If you're talking middle-of-the-road street car you can get away with a pair of 2" pipes or maybe 2 1/4". If your plan is to build this thing for a lot more performance I'd say 2 1/2" pipe with manderal bends would be your best move. Like everything, pipe size and material is a cost thing.

I prefer MagnaFlow mufflers over Flowmaster but that's just my taste. They're stainless, lifetime warranty and sound nice without that raspy sound - more of a deep throaty sound.

There are tons of mufflers out there so if it's cost look around and also go by the local cruise nights and check out whats out there and see what sounds good to you. Ask questions, people love to talk about their set ups and will most likely fire them up so you can hear them.

John

PS: I buy almost everything through Summit Racing on-line. Great prices and fast shipping. Then just have someone install it or do it yourself.
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Last edited by 65FalconLover; 05-18-2011 at 09:22 PM.
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Old 05-19-2011, 04:06 AM   #11 (permalink)
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Re: 302 2 barrel intake manifold? 1969

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Originally Posted by 65FalconLover View Post
Like an intake, exhaust design depends on several things too. Are you trying to keep the noise down, do you want it loud or something in between? Are you planning on a drive-in cruiser, weekend racer/street machine or all out performance?

It also depends on your motor plans, now or in the future. If you're talking middle-of-the-road street car you can get away with a pair of 2" pipes or maybe 2 1/4". If your plan is to build this thing for a lot more performance I'd say 2 1/2" pipe with manderal bends would be your best move. Like everything, pipe size and material is a cost thing.

I prefer MagnaFlow mufflers over Flowmaster but that's just my taste. They're stainless, lifetime warranty and sound nice without that raspy sound - more of a deep throaty sound.

There are tons of mufflers out there so if it's cost look around and also go by the local cruise nights and check out whats out there and see what sounds good to you. Ask questions, people love to talk about their set ups and will most likely fire them up so you can hear them.

John

PS: I buy almost everything through Summit Racing on-line. Great prices and fast shipping. Then just have someone install it or do it yourself.
Okay cool! The thing around here though is everyone is a ricer, with they're ****ty honndas and acuras haha! So I don't have much to go listen to or to see what's up. But thank you for all the suggestions, you think I'd beset with the edelbrock performer intake? What are some 4 barrel carbs that I ciuld look into? Cause it has a two barrel on it now, I mean I'm just looking for some middle of the road stuff here, and to burn some rubber here and there, and to show the ricers what a real car sounds like! nothing major.
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Old 05-19-2011, 07:11 AM   #12 (permalink)
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Re: 302 2 barrel intake manifold? 1969

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Nobody said definetly . give the specs of the vehicle and power train. correct 4 barrel carb/intake wont make it bog
hey i know i have a lot of questions, so sorry, but how do change a 2 barrel to a 4 barrel? do i need some sort of bracket? or it bolts on right in place of it?
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Old 05-19-2011, 08:06 AM   #13 (permalink)
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Re: 302 2 barrel intake manifold? 1969

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hey i know i have a lot of questions, so sorry, but how do change a 2 barrel to a 4 barrel? do i need some sort of bracket? or it bolts on right in place of it?
you buy the intake manifold , gaskets and the carb . then open up the tool box and start working
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Old 05-19-2011, 08:43 AM   #14 (permalink)
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Re: 302 2 barrel intake manifold? 1969

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you buy the intake manifold , gaskets and the carb . then open up the tool box and start working
Ohh haha okay, see I wasn't sure if there was a difference cool thank you, will I have to tune the engine up after that? Also what kindof gains can I expect with this? Will there be a difference in soundany hp gains?,
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Old 05-19-2011, 10:10 AM   #15 (permalink)
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Re: 302 2 barrel intake manifold? 1969

I'd guess that with the intake I suggested and 4 bbl carb you might pick up 15-20 HP. Unless you change the exhaust you aren't going to hear any differences in sound.

The carb will require some tuning but most I've bought came pretty close from the manufacture. Most likely idle mixtures and maybe float level adjustments if it has adjustable floats, some don't.

Like I said below, a Holley 600 CFM (Model 4160) with vacuum secondaries would probably work good for you and it's big enough that if you add other goodies later it should keep up. Summit sells them for around $250 new.

You'll most likely need to do some playing around with the throttle linkage, fuel line and a couple other items but it's not difficult.

John
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