Advise to do a low cost rebuild ec

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Hi I am interested in the cost of a rebuild of my 250in my '74 Comet.
2 approaches Iam thinking about
Rebuild the Motor basically stock, but would like to upgrade the ignition, to do away with the points.
It currently has a single barrel carb, so I would like to upgrade to a 2 barrell. I would like to put get a perfomance header and open up the exaust to boost performance. Is a new head needed or an adapter? and what carb would go with it?

The other scenario is for a big boost to performance, I talked to some guys a few months ago and they suggested a 3 carb set up for this application, what other upgrades would be needed along with this?

Is the 3 carb set up going to be a pain to keep tuned? I want better perfomance but reliablity and up to daily driving in various conditions.

I am open to suggestions as well

I got a new ( single barrell) carb ( I still have issues with the the Carb not starting the car and running right with changes in temperature.) I keep having to adjust the choke setting with wheather changes. Whats the best advise on setting the choke so I can get the car to start in cold weather and in hot weather?
 
well, i just noticed, I may have posted this in the worng catagory, my motor is a 250 Inline six, what makes it a " Big six?
 
The big sixes came out in 1964 or so. They are longer, taller, heavier and all featured detachable intakes. During the later sixties, capacity was increased from 240 to 200 by a stroker crank. There remained some overlap in production of the two capacities for several years. As an engine series, they found most favour in trucks, although fitment to passenger cars was an option through about 1970.

Your 250 was released for 1969 model year vehicles. Specifically, passenger cars. US made 250s always had an integrated manifold for intake, and a canted-down face for attaching the exhaust. They were somewhat shorter and lighter than the 240/300 design of motor.

Cheers, Adam.
 
howdy! glad you could find the site!

as for the points issue, i would recommend searching for topics on the Duraspark II upgrade, it uses all Ford parts so there shouldn't be any reliability issues at all
it's sometimes abbreviated as DS II or some variation on that, so make sure you do a couple different searches if you can't turn up anything

as for the tri-carb setup, one of our members once did a write up on the install and benefits of it
i believe the website where he has it written up is www.kastang.net just browse through and you should find it very easily



if it was me, i'd go with installing a larger carb (possibly a two-barrel, but that involves machinework which can be expensive), or possibly installing an Australian 250-2V head and intake, both are gonna be a bit expensive but they will be well worth it

good luck!
 
a duraspark is a simple drop in mod. let me know if you need one.

I would put a cam in (just something mild nothing extreme)

on the cheap you can get a rering/bearing kit for about $200 or so. give an at home hone job and off you go for a short block. I think I might have $500 in mine when it is all said and done (had the crank turned, picked up a cam form a member, arp rod bolts)

this can only really be done if your stock bore is in ok shape (no major wear or scoring)

toss some HSC pistons in there and get some compression if you need it.

if you take your time and properly set everything up you cna get it up and running for little cost (under $1000 with some performance goodies) put a header on there and really it would make for a cheap decent performer.
 
I have never done a rebuild before, I've done, Water pump install, ( on an old Dodge I had , Starters, Alternators, stuff like that, can anyone recommend a good How to for rebuilding a motor, is sit something a novice shoud /could tackle? Id need info on pulling the motor too.
Or am I best to have an experienced person do this?
 
One other thing, is there a fuel injection conversion available? and as alternative what do I need to convert form the 1bbl Carb, to a 2 bbl, and what 2 bbl is a good application
 
I have a spare dizzy sitting in a spare motor. I have one in my car right now too but I think it is coming out soon for the TFI dizzy if it works (will be going EFI then)

are you looking for a DSII setup?
 
HaleBopp, if you haven't done a rebuild yourself before, there are some considerations.

About the worst thing that can happen is to charge in blindly, thinking it's all pretty simple. We've had similar problems before with people; they seem to assume motor rebuilds are brain-dead exercises. Make it a priority to understand the relationship of every part in that driveline - there are no redundant bits!

After that, it is one of the easier motors to do a basic rebuild on, but being heavy and large-ish you need some space and a good stand/hoist. Also prominent is a decision on how you'll get the dismantled pieces away (and back) for specialised operations.

Regards, Adam.
 
yeah i agree completely addo, thats why I asked, i have no misconceptions about it being, a cake walk, not exactly like changing oil.
Last thing i want is to get it all torn apart, only find out I am in over my head. Or worse yet, "think" i did it right and find out the hard way when I am 1000 miles away from home.

Any recommendations on "how to books"
 
Hate to hijack the thread, but...

Turbo, are you selling that DS II or giving it away? Since Wilhelmus called it first, if he doesn't want it, would you be willing to part with it? :D

As for getting back to the main post here,
I like the idea of going to a 2 bbl carb - but if you're looking for a good boost, go with the three. The Australian heads are getting really rare, though I sure would love to get one :)
 
Anyone, , What 2 bbl Carb? What do I need to put it on? new Intake, Adapter for current? Is there a fuel injection set up available?
 
The link LaGrasta posted above is good for the Holley 5200 two barrel. Its a very inexpensive way to go and get good results. Its a progressive two barrel and gets better mileage and performance than the stock one barrel.

Another way to go is a Holley 350cfm two barrel that is available in any racing catalog. I think the easiest way to mount that is with the clifford carb adaptor. Just search for clifford. This is a non progressive two barrel that will give more power than the 5200. I don't know what mileage is like.

If hood clearance is an issue or you would like even more power, you could have the intake machined to mount either of those carbs directly. Plenty of people on this forum have done it. Search for something like "direct mount"

There is no bolt on efi kit. I think AzCoupe at www.classicinlines.com may be working on one to eventually sell but I don't know anything about it.
 
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