xf inlet manifold - Page 2 - Ford Forums

libbys_xf · 02-04-2008, 03:22

you would not gotwin holleys at al lor a holley of that size and if you needed a 750dp you would never be able t odrive it on the street cos the engine would be so serious it wouldnt be practical at all, i have converted to efi now and dont run carbs use an aftermarket computer and is a much better option, mate u have to sit down and work out what u want before i could give u any sort of advice cos i dont know what u want, its acase of how long is a peice of string, if you want to get more info on this sort of thing visit xFords.com and once u work out what u want this engine to do post it up there and we should be able to offer some advice but man u can go really far with an engine depending how much money u have and how serious u want to go and waht aplication u are using this engine for eg street reged or race car,

JACK BLACKER · 02-05-2008, 00:42

done some serious research today and i need some advice between three carbs. 350, 500, both 2 barrel or a 465 4 barrel
bear in mind some mods already exist.
also wat i could do to increase take off speed as its a bit sluggish off the line
any help would be greatly appreciated

cheers

libbys_xf · 02-05-2008, 02:30

if you close to standard motor then u wont need to go above 350 holley and a decent aftermarket manifold. if you wont to increase take off speed then change to lower diff ratio. mate what has been done to your car??? and list al lthe mod u have done to the engine

JACK BLACKER · 02-06-2008, 01:01

i only hav a few mods done but yeh....
extractors
according to the gu i baught the car from a performace cam
twin au fans(not sure if this does much)
and the block was reconditioned
also all new parts basically nothin is too old

not really sure if this all does much but ne way

cheers

libbys_xf · 02-07-2008, 00:33

then if its only little mod work then u would put a 350 holley on nothing bigger, with an after market manifold like redline or something like that and a decent tune u will be set. u wont be making any big hp but u will be better than u are currently, try a differnt diff ratio and maybe a a t5 manual conversion, these mods are very common for the xfs and many people are doin g these mods them selves at home and prety cheaply, with a combo like that u will be alot quicker, but again with out major engine work u wont be crazily fast but u will be suprised how well your car will go with a few simple mods and a few conversions, im guessing u are currently auto? is so then maybe consider the t5 manual conversion, the web adress i gave you before will be able to give u advice on how to fit these things your self, this forum is good also but xfords.com is a forum just for xd-xe-xf's, so might be worth checking it out

JACK BLACKER · 02-07-2008, 02:58

i'm running a 5 speed rite now and i was thinkin about this all ova the past few days and i really want to get my car over 250kw if its possible
i would like to now how to get it there
i probably sound hell indecisive atm jst goin bak n fourth

cheers

libbys_xf · 02-07-2008, 04:41

to get that sort of hp out of a na motor u would really need your engine pulled down and taklen into a speedshop and let them go nuts and it would not really be a streetable motor,

if you want a big hp engine and to drive it on the street then u would probly best going a trubo crossflow. turbo wil lbe the easiest and cheapest way and your car would be more streetable than a serious n/a motor.
go talk to your local speed shop tel lthem what u wont and ask best way in which to do it.
with big hp u have to keep in mind alot of planning and designing is involved to get all the parts working well with each other.
if i were you and were serious about getting this hp then i would invest in efi and not carb then go turbo and a serious bottom end to handle the boost that you will be sticking into it.
keep in mind u would need after market ecu's and thats good money and plus all the machining and turbos, internal engine parts, manifolds and pipes and tubing and thsi is just the begining, u would be looking at least 10-12k on the setup. big hp costs big money.

JACK BLACKER · 02-07-2008, 22:43

if i were to lower it to a bit ova 200 kw
and i really want to keep the carb thing happenin
so any ideas?

cheers

JG41XYGS · 05-13-2008, 06:10

it all comes down to what you will use the car for , the amount of money you can spend.
maybe get onto ebay and looking at snort performance or call them : 0405522147 ask if they do turbo stuff for carb appications.
one kit they addvertise is for ea-au. 200-350 rwkw for about $5000.

other than that n/a mods and tuning would unlikely compare $ for $ on performance gains compared to forced induction.

i have an xf ute, 5t g/box, gas towing cam, 2 barrel holly manifold, 350. extractors. reco bottem end with ULP compression ratio friendly pistons. but with the lpg i'm thinking i could have gone for a bit higher.

however it performs quite well,enough power to pass/hills without any problems. not the sort of hp numbers you are chasing. but i towedmy 91 v8 LTD in a tandom trailer to get trans serviced. did a much better job of it than i first thoght it would.