2 bbl swap. is it worth it?

As you may know im a bit...young....and i dont have that much money to pour into the motor. however if the carb on our 302 we have is an autolite 2100 (the 302 came out of a 70-73 F-something) and i have the resources to mill the manifold then why not? also the reason i didnt want to do a 302 swap is the time it takes and if i want a high performance car i can rebuild my cobra II. and the thing about getting an aftermarket manifold and cylinder head is the as above, money.

 

Lol I dont think you understood me. Even if you wanted to you CANT swap the intake on the 6 cylinder. Its not removable. But you can mill it down like you want. Im not telling you to buy the head, its Alot of money and the gain is not big at all for the money.

 

thanks for the info

one more bump in the road, i just got the car running prior to the wanted modification and i want to put a dual out header the only thing is my car is an A/C car and i'd have to remount the alternator in anouther location

 

Yes I do,the 390cfm holly 4 barrel was designed specifically for 4 an 6 cylinders & actually works great on small v8s..the carb comes in 3 different packages..(If your intrested I can get you the model numbers.)
I used this carb several times.years ago on my daughters capri/must.
with a 200 C.I.straight 6..worked great.! I now use it on a 330HP Must.
even though it gives up some mid to top end HP.the benifits on the street
far out way the top end HP loss..Throttle response is great,and thats what
you need 98% of time..(by the way NASCAR uses one of these models so don't think it's not a serious carb.also 4/6 cylinder road racers). you
can probably pick a rebuild one up for under $2OO..New ones are around
$400.

 

I have rebuilt plenty of Holleys. But a 200ci engine at 4,500( stock cam maxes out at this point.) only requires 221cfm. You can get that from almost any 2bbl. And if your worried about millage theres always the 5200 which is like a quadrajet 2bbl that came on pintos.

 

I am interested in how you mount a four barrel to the 200 " six...
care to explain?

 

This thread is comical if not interesting. Some of these people, as some have pointed out, haven't really looked at the head on their cars. The head and intake log on the small ford six are a one piece casting. If you are going to do any machining on the intake, make sure you take the head off of the engine first and make sure it is properly cleaned out before reinstalling it. I do believe that machining a larger opening in the intake log and using the proper adapter plate with the weber/holly 2v carb would be the best way to go. It is my understanding that these carbs come in various cfm ratings up to around the 350 cfm area. To realize the most benifit from these modifications I would recomend the cam and exhaust header up grade also. Good luck with your project.

 

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Hi Mav...Your absolutly right,it is hard to argue with physics,the engine is an air pump.Most engine builders use one or another formula for their carb
requirements at a given RPM and C.I.,but in reality for wide open running
exceeding that choice normally nets more HP..By installing the 390 the engine pulled much harder and gained about 300 RPM..Installing a header
and going to the next size exhaust pipe,another200-300 RPM was relized.
It behaved like a different engine..some of these figures might be out,but
it is the best I can remember,the changes where done back in 86..I have
never experimented with the 2bbl's so I can't say which is better I only
can share my experence with the 390..But it would be definiatly more cost efficent to use a 250/350 two bbl if the results would be the same.
The 390 cost about $200,machining/customizeing intake about $150.
exhaust changes about $300.at the time,probably more today.

 

HI Street,You forgot to mention that when you take the head off,check
for cracks.The Inline 6 clyinder heads with intigraded intake(especallythe
200 CI) tend to have them.How do I know?mine was cracked in several places.I pulled 3 heads at the wreckers before I found a good one.Every one I had to magnaflux.