xf inlet manifold - Ford Forums

philtas · 01-13-2007, 20:41

this is my first post hope someone can help, am looking for a inlet manifold to suit 86 xf that can take 2* 350 hollys as i have one allready or am i just wasting money do i just go for a bigger carb or up grade my jets, am getting help to build a new 6 from scratch from a mech friend with larger cam rebore ect am only new to this but am willing to learn.
thanks
phil

atec77 · 01-14-2007, 02:32

Quote:

Originally Posted by philtas

this is my first post hope someone can help, am looking for a inlet manifold to suit 86 xf that can take 2* 350 hollys as i have one allready or am i just wasting money do i just go for a bigger carb or up grade my jets, am getting help to build a new 6 from scratch from a mech friend with larger cam rebore ect am only new to this but am willing to learn.
thanks
phil

there used to be a manifold availible which supported the 4 barrel Holley , a much better choice .

philtas · 01-15-2007, 11:22

Thank you for you response and advise would you now were to start to get one from any web sites or members
thanks
philip

jas24zzk · 01-16-2007, 05:23

700 cfm on a 4.1 6pot...
you won't get any better performance from it..only fuel burn!

i used to have a 3 litre with triple webers that only totalled 360cfm, and that sucker pumped out 223kw at the fly!

it is so easy to over carb in search of performance! one 350 holley is MORE than enough for a mild 4.1

Cheers.
Jas

JACK BLACKER · 01-25-2008, 23:00

Quote:

Originally Posted by jas24zzk

700 cfm on a 4.1 6pot...
you won't get any better performance from it..only fuel burn!

i used to have a 3 litre with triple webers that only totalled 360cfm, and that sucker pumped out 223kw at the fly!

it is so easy to over carb in search of performance! one 350 holley is MORE than enough for a mild 4.1

Cheers.
Jas

what whould u define as mild, becasue i am thinkin of doing the same thing to my xf.
all help would be good
ty

libbys_xf · 01-28-2008, 05:22

if you have a highly worked crossflow then a 4bbl is the go, but until that point my experiences with 350 hollys can definatly start showing improvements over the webber,
a good cheap mod and will keep up with many mods u do on ya xf till u start getting cams over 214-215 dur @050 thou, thats what i would call a mild motor with cam specs smaller or around that.

JACK BLACKER · 01-31-2008, 03:44

Quote:

Originally Posted by libbys_xf

if you have a highly worked crossflow then a 4bbl is the go, but until that point my experiences with 350 hollys can definatly start showing improvements over the webber,
a good cheap mod and will keep up with many mods u do on ya xf till u start getting cams over 214-215 dur @050 thou, thats what i would call a mild motor with cam specs smaller or around that.

i was thinkin of a holley 3310S 750 CFM Four Barrel but im thinkin it may be a bit much. so if i went with another plan i had..which was to use two holley 350 carbs which would produce better results?
cheers

atec77 · 01-31-2008, 18:06

Quote:

Originally Posted by JACK BLACKER

i was thinkin of a holley 3310S 750 CFM Four Barrel but im thinkin it may be a bit much. so if i went with another plan i had..which was to use two holley 350 carbs which would produce better results?
cheers

I suggest a 350 or 500 holley 2 barell and adaptor on the std manifold in a suck it and see.

libbys_xf · 02-03-2008, 03:20

mate 2x350 is way to big mate, and a 750dp is not something u wack on a 250 crossflow mate, it would be like getting a bucket of fuel and pouring it down the carb lol.

what has been done to your 250crossflow? lol if close to standard just goa single 350 holley and get an after market manifold as stock manifolds flow poor with adapters.

JACK BLACKER · 02-04-2008, 01:16

Quote:

Originally Posted by libbys_xf

mate 2x350 is way to big mate, and a 750dp is not something u wack on a 250 crossflow mate, it would be like getting a bucket of fuel and pouring it down the carb lol.

what has been done to your 250crossflow? lol if close to standard just goa single 350 holley and get an after market manifold as stock manifolds flow poor with adapters.

could give me some advice on how to make it modified to handle wat i want, if at all possible
it has a performance cam, extractors, had headers done, block was completley redone
wat else needs to be done/changed before i can put wat i want on
cheers