gonna build an NA 4.1L

XFlow_Fairlane

XFlow_Fairlane

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ok so I have a couple xflows laying around....and some parts....

I have a cain 4bbl intake
a set of 200 rods.

planning on some ACL pistons for the 250 crank and 200 rods.
a cam (prob a crow? but not sure which)
header (looking for a dual out)

as far as a carb/intake I could go 4bbl but not sure if that will be too much carb for a "street" motor (small like a 525 or smaller) but also have a stock 2bbl intake, 2bbl holley pattern intake and a 1v intake (along with EFI bits) I have toyed with the IDEA of building this motor so that it could MAYBE work with the stock EFI setup so I can go that route.
 
Is you Cain manifold for the first or second type of alloy head?

Crow have lots of profiles not specifically listed for the Ford crossflow six. Of what they do enumerate, the 14776 would work alright N/A, but could be a little harder to tame with EFI.
 
Probably. A lot of people find around 450CFM to be plenty unless you're really racing it.
 
Are you sure you're not just misreading the firing order? :lol:

If it mates up to the heads with injector notches, it's compatible with them. I'm not 100% sure that the flange (or possible water passages) didn't change between alloy heads I and II.
 
well that does me now good since the rest of the motor is 1000 miles away (literally!!)

Well looking around at carbs it looks like my options are:

500cfm 2bbl Road Demon (yeah just a fancy holley)
390cfm holley 4bbl
525 Road Demon 4bbl.

I think the 525 might be a little much for a sreet car but I am half tempted to give it a go (only money right?)

I am a little partial to the demon carbs since they are just a little more than a holley carb but a little bit better "quality" I would like to use the Cain intake if I can but have a feeling I might just end up with a plate on a stock intake if I go 2V. I guess now I need to find a cam for this screamer.
 
You'll get poor atomisation with the larger carbs. The only reason to upsize from something like 450, is if you can demonstrate it needs more fuel/air.
 
yeah I am aware of that and bogging issues that can come with too big of a carb. maybe I will start out with a 500cfm 2bbl and go from there. will be a fair weather ride so might just go right to a chokeless carb incase I want to boost it later on.

now a couple other questions....

the weak point on the xflow is the pushrods (for high RPM usage)?

I think I might be using the 200 rods in this motor with some ARP bolts in them.

I still need to pick a cam grind or two (I will prob get a couple sent up at the same time)
 
ok so my bottom end....

freshened crank and bearings
200 rods
250 crank
ACL swap pistons
zero deck block

now I have a bunch of xflow parts around now so I should have a couple selections for a head.....any one preferred for building a NA motor for petrol? I am thinking of a E85 motor maybe (like 12:1 compression) or a 10:1 compresison motor that can run on pump gas.

so for either route what should I be looking for in a cam on a stick shift car with say 3.73 gears in it and a weight around 2800#?

I do have a used aussie cam I was thinking of having reground stateside if I needed something way custom.
 
Im using the redline 4 barrel intake with a Edelbrock 500 4 barrel , turned sideways to fit into engine bay clearing the strut tower. The cam is a crow 14892 . The engine pulls hard and sounds awsome when the cam comes in , and the 4 barrell is suckin hard .Also using pacemaker headers , dont get hurricane headers there crap.
Dave
 
is there much work that can be done to a head on these? or is it just a simple cleaning around the valves and gasket matching? I have a head with two small cracks in it I was going to have repaired and figured I might just port it a little before hand if there is anything to gain.

Oversized valves?
 
depending on the type of head you have , i dont think thers much to be done on the heads .There a good head out of factory . Port matching and 3 angle seat job are a good start . You can go hard out on the head and fit flash stainless valves with undercut stems , but the list goes on and on .

cheers
Davo
 
so a basic clean up on the alloy head and I am pretty good to go then?

the one head I have a bare so since I need to replace th evalvetrain in it I was looking to upgrade (and build a hardcore head to have around)
 
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