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 Carb and Intake Help - 72 Firebird 
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Post Carb and Intake Help - 72 Firebird
My brother-in-law got a 72 Firebird recently. We got it running, but there was something wrong with the carburetor. So, today we call Tennessee Speed Sport and they say they have a replacement carb. We go pick it up and come back home. Won't bolt up. So we call back and they tell us they have an adapter. Ok, so we go pick that up. Get back to the garage and bolt the adapter and carb on. The hood won't shut (the breather is not even on yet).

I guess we could get the 2bl Rochester rebuilt, but we were looking for a quick fix to get it on the road. I would really like to put a 4bl intake and carb on it, but someone told me it's not wise to swap manifolds on that old of an engine??

The car is a 350/350 automatic. You guys got any ideas for me?

(BY THE WAY DOES ANYONE ELSE THINK THE TEXT LOOKS DIFFERENT ON THIS SITE?? I DIDN'T DO ANYTHING, BUT SOMETHING IS DIFFERENT.)

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Mon Mar 02, 2009 9:13 pm
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I've bought rebuilt rochesters before. get the # off of it and ask the parts stores. I've had good luck w/them

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Mon Mar 02, 2009 9:41 pm
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Text looks the same to me, Trai.

I was wondering why you didn't just pick up a new 4 bbl carb and intake. I've never heard anything about not putting new bolt ons on an older engine. Seems like it would be OK as long as you re-gasket and everything OK.

When I first bought my truck, it had been sitting for two years and wouldn't start. I bought an Edelbrock manifold and Performer 600 carb and installed them along with plugs, wires, ECM, cap, coil, and rotor and drove it to Nashville every day for years. The engine had been replaced at one point and ended up nuking after a few years anyway, but no mushroom cloud appeared as soon as I turned the key or anything. Not exactly the same situation, but still.

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Mon Mar 02, 2009 9:49 pm
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Thanks guys any options on intake/carb for a low profile fit??

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Mon Mar 02, 2009 10:00 pm
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Any decent Edelbrock intake would do just fine. Hit Craigslist for one and then just get a replacement for the carb from O'Reilly's or if you have the $$$$ get the edelbrock or holley

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Mon Mar 02, 2009 11:39 pm
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5150 wrote:
Any decent Edelbrock intake would do just fine. Hit Craigslist for one and then just get a replacement for the carb from O'Reilly's or if you have the $$$$ get the edelbrock or holley


We got new Holly 2bl carb yesterday, but with the adapter the hood wouldn't close.

Found this intake and Carb on CL in White House. Gonna go look at it today.
http://nashville.craigslist.org/pts/1042626266.html

Found this too. Looks like it will bolt up, but it says it's for a dodge,chrysler,plymouth.

[web]http://nashville.craigslist.org/pts/1024037333.html[/web]

Also found this on Summit Racing. I know this will work, but hate to wait on shipping :happy: .
http://store.summitracing.com/partdetai ... toview=sku

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Tue Mar 03, 2009 8:08 am
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killthewabbit wrote:
I was wondering why you didn't just pick up a new 4 bbl carb and intake. I've never heard anything about not putting new bolt ons on an older engine. Seems like it would be OK as long as you re-gasket and everything OK.


That's what I thought too. Just looking for some more input than what I already had :happy: .

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Give these guys a call. I think their in your neck of the woods.
http://butlerperformance.com/

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Tue Mar 03, 2009 8:22 am
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Most of the time you can hit up the local auto zone/advance auto or whatever and they'll have stuff in stock for small block chevy. Carburetors won't be manufacturer specific, but I doubt they'll have an intake for your Pontiac in stock. You might wanna go ahead and order one.

If you do go with an Edelbrock (my personal favorite) make sure you get the fuel line kit for it. If not, you won't be able to use a drop-base air cleaner and you'll be right back in the same boat you're in now. Here's what the fuel line kit looks like:

Image

Here's a link to it on Summit's site:

http://store.summitracing.com/partdetail.asp?autofilter=1&part=EDL-8134&N=700+115&autoview=sku


Tue Mar 03, 2009 9:04 am
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Is it a 350 Chevy or 350 Pontiac (if there is such a thing)?

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Tue Mar 03, 2009 9:05 am
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Heck I don't know. I thought a 350 was "350". :mrgreen:

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Tue Mar 03, 2009 9:49 am
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I don't think they started interchanging engines between Chevy and Pontiac until the 80s. If it's a Pontiac, you'll need to keep that in mind if you ever have to get a new trans, since there's SBC th-350 bellhousings and BOP (Buick, Olds, Pontiac) bellhousings.

Here's what I found on wikipedia:

http://en.wikipedia.org/wiki/Pontiac_Trans-Am#Second_generation_.281970.E2.80.931981.29

According to that, they didn't put Chevy 350s in Firebirds. I don't know what the differences are, though.


Tue Mar 03, 2009 2:13 pm
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Thanks for the info. He went ahead and bought the replacement carb from summit racing listed above. I am 95% sure it's the right one.

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Good luck getting it from Summit. I had to send my 2 wheels back because they just kept giving me dates when it (other 2) was supposed to be shipped.

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Wed Mar 04, 2009 12:28 am
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thelonerife wrote:
Good luck getting it from Summit. I had to send my 2 wheels back because they just kept giving me dates when it (other 2) was supposed to be shipped.


Yeah, I hope we have better luck.

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Wed Mar 04, 2009 1:26 am
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I've always had pretty good luck from them. Hope you do too.

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Wed Mar 04, 2009 9:42 am
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Got the carb from Summit a few days ago. Installed it last night. The car idles fine, but when I give it gas it still sputters a little. I can get the RPM's up by feathering the gas. Any suggestions? New fuel pump? It almost acts like it's getting too much gas or running really rich.

Do these cars have catalytic converters? I had a 81 Monte Carlo in High School and the catalytic converter was stopped up and it would do something similar.

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Sat Mar 14, 2009 2:07 pm
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undo your exhaust and fire it up. I wouldn't run it too long

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Sat Mar 14, 2009 11:11 pm
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sounds like it may need adjusted ??

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Sat Mar 14, 2009 11:12 pm
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I'll watch the little DVD that came with it and give adjusting it a shot. Never messed with adjusting a carb before.

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Sat Mar 14, 2009 11:37 pm
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No on the catalytic converters. I don't think those were around until 75-76, but I could be wrong since I was 3 years old around then.

It's prolly the adjustment of the carb.

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Mon Mar 16, 2009 12:21 pm
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I agree about the cats. I don't think those came around till the mid-70's. It sounds like a tuning issue to me. If you were closer, I would help you out with tuning.

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Tue Mar 17, 2009 7:14 am
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Thanks guys. I am gonna give it a shot.

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Tue Mar 17, 2009 1:55 pm
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Cut the exhaust off from where they come into one pipe. Sounds and runs much better. Took it up and down the road a few times and really got on it. Still some popping in the carb though. Gonna try a new condenser, points, and possibly a coil. I think I am also gonna replace the fuel pump too. Wish I didn't have to do so much guesswork.

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I would look into either an HEI or an electronic conversion kit before messing with points distributors.

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Wed Mar 25, 2009 7:12 am
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i would also puta new fuel filter on the line if you haven't already

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Wed Mar 25, 2009 8:32 pm
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If you need help with the points let me know and I will come up and give you a hand if you want. I have a old grand prix with point and learn how to work with them and or replace them. But I will tell you that slick 68 has the right idea with the hei or conversion kit. I also have the tools to set the points let me know Ive been fooling with Pontiacs long before I stated playing with trucks.


Wed Mar 25, 2009 9:15 pm
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Thanks for the suggestions guys. Much appreciated.

I agree about the HEI and I will push him in that direction.

I went over this afternoon and started it and drove it up and down the road again. Really got into it. It popped one time, but nothing like before. Sounds bad### with these shortpipes on it. It's amazing how much this thing opened up after I cut that exhaust off. I am still gonna replace the points and condenser, and I suspect there's a fuel filter on this thing that needs changing pretty bad too.

Trey, let me know where you live and I'll slap some tags on this thing and drive it over, or you are more than welcome to stop by over here. It's hard to explain problems like this over the internet. I know people who have an ear for this could target it pretty quick in person.

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Thu Mar 26, 2009 12:39 am
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My grandfather always used to comment on timing when he heard a car popping, especially when it was off the gas. I wonder if your points and condenser and getting it timed right wouldn't fix that.

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Everything you regret doing eventually becomes a funny story you tell at parties. Everything you regret not doing is something you bottle inside and die wondering about.


Thu Mar 26, 2009 10:40 am
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killthewabbit wrote:
My grandfather always used to comment on timing when he heard a car popping, especially when it was off the gas. I wonder if your points and condenser and getting it timed right wouldn't fix that.


Maybe so. It's 100x better with the exhaust off, but I wanna get it perfect.

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Thu Mar 26, 2009 11:38 am
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Are your mufflers that restricted, or did you find catalytic converters under there?

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Everything you regret doing eventually becomes a funny story you tell at parties. Everything you regret not doing is something you bottle inside and die wondering about.


Thu Mar 26, 2009 12:09 pm
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No catalytic converter. It just felt restricted because it would idle fine but as soon as you gave it gas it was popping back through the carb. It was rusty anyway, so I just cut it off.

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Thu Mar 26, 2009 12:27 pm
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Hey Trai I just sent you a pm with my number. Just call me when you get a chance and will decide when where and how to do it.


Thu Mar 26, 2009 8:23 pm
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did you ever find out if its a pontiac engine? I have en edlbrock 4brl intake that i had on my 400 before it blew up.

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Sat Mar 28, 2009 1:26 am
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Trey,

Didn't get out today. Try and give you a call tomorrow if you are free.

Earl,
It's a 350, and I assume it's a Pontiac 350, but I don't know alot about stuff like that.

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Sat Mar 28, 2009 1:34 am
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if its a pontiac it huge valve covers will look all most the same size but the intake is wide plus the water pump takes up almost the hole front of the engine.

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Sat Mar 28, 2009 1:38 am
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Went over Trey's (Inherited71) tonight and he spent a couple hours checking it out. May have a stuck valve. Thanks Trey!

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Sat Mar 28, 2009 9:22 pm
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Ur welcome & that is a Pontiac Engine.


Sun Mar 29, 2009 8:54 am
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if its a Pontiac Engine and he decided he wants a 4brl let me know and Ill dig out the intake I have.

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