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Author
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Topic: 4300 carb combo
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craigber
Gearhead Posts: 125
From: Vancouver, Canada
Registered: Sep 2000
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posted 12-03-2005 03:33 PM
   
HII am wanting to possibly put a 4300 (I believe it is a 4300) on my 1965 289...what intake should i use if i also need to have EGR? carb tag autolite DOPF AG
A OH 25 or is this a bad idea?
thanks
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Jake11
Gearhead Posts: 207
From: Banning,Ca,USA
Registered: Oct 2005
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posted 12-03-2005 09:23 PM
Yes, bad. Those things either work good
or their terrible. Most are terrible. GM
designed it.
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craigber
Gearhead Posts: 125
From: Vancouver, Canada
Registered: Sep 2000
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posted 12-03-2005 11:25 PM
Hi
yeah i've heard the horror stories but some say they are really great if you get them right...i need to pass emissions so I think the 4100 is out...any other possibilities? can you make a 4100 work on an EGR plate?thanks
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Jake11
Gearhead Posts: 207
From: Banning,Ca,USA
Registered: Oct 2005
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posted 12-04-2005 01:51 AM
What's an EGR plate doing on a 65 289?
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Jake11
Gearhead Posts: 207
From: Banning,Ca,USA
Registered: Oct 2005
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posted 12-04-2005 01:55 AM
You could make the 4100 work ok, but the
smog tech would look at it and fail it right
away, at least here in CA.
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PONYMAN
Gearhead Posts: 398
From: Ardmore, Ok. USA
Registered: Jul 99
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posted 12-04-2005 09:53 AM
I have a 4300D on my 72 and it works wonderful. Of course it was rebuilt by Pony Carburetors, and they re-engineer them and take out most of the problems.
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craigber
Gearhead Posts: 125
From: Vancouver, Canada
Registered: Sep 2000
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posted 12-04-2005 11:34 AM
hi
the EGR plate is on the 65 289 cause its legally supposed to be a later 302...came that way and i like it!! I just want to continue making it look like it should but want it to go go go....they rarely open your hood here in Vancouver (unless you fail) but i have to meet late 70's emissions with the sniffer,,,no pass equals no insurance
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craigber
Gearhead Posts: 125
From: Vancouver, Canada
Registered: Sep 2000
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posted 12-04-2005 01:04 PM
HI
just want to add that i got this 4300 for a song and it looks to be in really good shape...also looks like the kinda carb that can be a monster with streetability...i have a 351C so i know what they can do....because it is EGR i can almost certainly use it and get thru smog...otherwise i would go with a 4100..any idea on how hard it would be to cut and adapt for an EGR plate? don't want to butcher a 4100 !!
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craigber
Gearhead Posts: 125
From: Vancouver, Canada
Registered: Sep 2000
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posted 12-04-2005 01:51 PM
ooops...brainfart....the 4100 should bolt right on cause the EGR plate does all the work....
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Jake11
Gearhead Posts: 207
From: Banning,Ca,USA
Registered: Oct 2005
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posted 12-04-2005 04:41 PM
Try it and see if runs ok. Only cost ya
a base gasket. But I remember the 4300
being a spreadbore. Been a while since I
got to play with one. They work great if
you have a "good one".
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68 S-code GT
Gearhead Posts: 3523
From: Sayreville, NJ, US
Registered: Mar 2000
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posted 12-05-2005 08:39 AM
quote:
Originally posted by Jake11:
You could make the 4100 work ok, but the
smog tech would look at it and fail it right
away, at least here in CA.
How can they fail something that would be original equipment just because its there? The 4300 has the square pattern and all like the 4100 and Holley?s etc? and will bolt right on. You might have a problem with the air cleaner fitting if you have an after market one. The 4300D is the spread bore type. [This message has been edited by 68 S-code GT (edited 12-05-2005).]
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craigber
Gearhead Posts: 125
From: Vancouver, Canada
Registered: Sep 2000
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posted 12-05-2005 01:33 PM
thanksI don't believe the 4300 ever showed up on a 289...but you might know better than me....this is a spreadbore as far as I can tell...secondaries are larger than primaries...and it is mechanical secondaries...i thought the 4300D was simply one with electric choke rather than exhaust heated....that's what my Chilton's says...
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Jake11
Gearhead Posts: 207
From: Banning,Ca,USA
Registered: Oct 2005
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posted 12-06-2005 03:19 AM
How could they fail it. It's called visual
inspection. In Ca. where I did actually do
smog tests on cars, you looked for out of
place parts. 4300's were used on 289's
starting in 67. He said his is a 65. A 4100
would have come on a 65. I don't really
know how the rules of smog are in Canada.
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68 S-code GT
Gearhead Posts: 3523
From: Sayreville, NJ, US
Registered: Mar 2000
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posted 12-06-2005 09:28 AM
quote:
Originally posted by Jake11:
You could make the 4100 work ok, but the
smog tech would look at it and fail it right
away, at least here in CA.
This is what you said! I take this as if his 65 had a 4100 then it would fail. [This message has been edited by 68 S-code GT (edited 12-06-2005).]
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craigber
Gearhead Posts: 125
From: Vancouver, Canada
Registered: Sep 2000
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posted 12-06-2005 11:36 AM
hithe smog guys up here aren't too savy but can't take a chance...if the 4300 showed up on 289s i should be ok..i doubt they would know...as long as it is a ford part and not an edelbrock they probably would take my word for it....up here if you have collector plates (which i don't have) and get in an accident, your insurance is void if they find any non-original stock part including headers! my neighbor has to keep his 351C 4V bone stock to keep it insured
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Jake11
Gearhead Posts: 207
From: Banning,Ca,USA
Registered: Oct 2005
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posted 12-06-2005 07:27 PM
You's guys have some strange laws, like
we do down here. Most all the older stuff
is exempt till you go to transfer title.
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Jake11
Gearhead Posts: 207
From: Banning,Ca,USA
Registered: Oct 2005
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posted 12-06-2005 07:35 PM
68-
He's got it recorded as a later 302. A 4100
was never stock on a 302, but a 4300 was. if
they don't open the hood to look, it would be
fine with either carb. If they look, it has
to have the model carb that supposed to come
on that motor. Here in Ca. they always look,
at everything.
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Moneymaker
Administrator Posts: 28191
From: Lyons, IL, USA
Registered: May 99
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posted 12-06-2005 09:54 PM
First off:
ALL 4300's use a Holley/Autolite 4100 bolt pattern.
Only the 4300 "D" or 4350 is a spread bore.
The standard 4300 is a uniform 4 hole.
Late 1967 289 NON Hipo 4v engines used the 4300.
Only 302 that used a 4300 was 1968.
Is that the engine you are claiming?
You could claim it as a 69 or 70 302 4v and use a Holley. That could solve all your problems. 
Any 4300 will bolt up where a 4150/4150 Holley or 4100 Autolite will.
A well rebuilt 4100 on a well tuned engine will pass 70's emissions with flying colors. It is far easier to tune and lean than any 4300.
They use Holley power valves.
------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First NHRA & IHRA 289 automatic Superstock Mustang in the TENS 06-99
First SS/MA in the TENS 04-03
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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craigber
Gearhead Posts: 125
From: Vancouver, Canada
Registered: Sep 2000
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posted 12-06-2005 11:21 PM
thanks for all the info...i am trying to sell/trade this 4300 to my neighbor with the 1970 Mach I....this would be correct for his 351-4V ....i am going to get a 4100 or trade him for one of his holleys...if i can pass the smog then no need to ever open the hood for an inspection!
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Jake11
Gearhead Posts: 207
From: Banning,Ca,USA
Registered: Oct 2005
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posted 12-07-2005 02:06 AM
I got a 4100 with a new power valve if you
want to borrow it.
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craigber
Gearhead Posts: 125
From: Vancouver, Canada
Registered: Sep 2000
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posted 12-07-2005 07:39 PM
hi
thanks...how much to "borrow" yoiur 4100? my neighbor is trying to find a 4100 to trade for my 4300 which is correct for his car...you want it?
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Jake11
Gearhead Posts: 207
From: Banning,Ca,USA
Registered: Oct 2005
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posted 12-08-2005 02:45 AM
If you got the correct main jets for it,
it's not a problem. I got it used, and some
body drilled out all the jets, pri&sec to
like 1/8". I tried to make it work till I
took a closer look and found it was re-jett
ed with a drill. I don't know where to get
jets to fit it. I got Holly jet's (surprize)
but their too small to fit. ?????????
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Jake11
Gearhead Posts: 207
From: Banning,Ca,USA
Registered: Oct 2005
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posted 12-08-2005 03:30 AM
Posted on the Ford carb site. Lookin for
the jets. If I can find the right ones, I'll
ship it , all you gotta do is pay shipping
and for beer of course! OK?
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