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What kind of mods can u do to an EFI 250 crossflow 

 

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 Post subject: What kind of mods can u do to an EFI 250 crossflow
Posted: Sat Dec 30, 2006 11:22 am 
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I have a 250 crossflow EFI and iam looking at doing it up a little bit, what kind of exhaust would best suit me and any other little mods anyone may no. thanks
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Posted: Sat Dec 30, 2006 5:13 pm 
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2.5 echaust dude get a cam in her and put a k@n air filter on it

 

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Posted: Sat Dec 30, 2006 8:50 pm 
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Replace the motor with an XE carbi motor, do a little bit of bottom end work, do a heap of head work. put a massive lumpy cam in it & then stroke it. Put a 3 inch exhaust on it & you'll never look back. Trust me, it will sound awesome & go even better. I know from personal experiance! lol

 

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Posted: Sat Dec 30, 2006 10:38 pm 
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SleeperEL wrote:
then stroke it


you have to be kidding right?

 

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 Post subject: Re: What kind of mods can u do to an EFI 250 crossflow
Posted: Sat Dec 30, 2006 11:29 pm 
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XW Fairmont 302 wrote:
I have a 250 crossflow EFI and iam looking at doing it up a little bit, what kind of exhaust would best suit me and any other little mods anyone may no. thanks


You can go fairly silly (to a point) without a computer change here because they are a mass flow system. There mass flow sensor is pretty dodgy, the vane type, but they are adjustable. I am assuming it is an EEC IV from an XF, not an old Bosch Jetronic or something silly.

 

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Posted: Sat Dec 30, 2006 11:48 pm 
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It`s completely doable...more money than sense though...

If you have an EFI crossflow, you wont go far with a factory ECU...mild cam,E2 head cleaned up a little,shave for compression(9.3-1) Extractors, 2.1/4" exhaust, quality panel filter, not much more except keeping good tune, clean plugs and filters/oil, etc...outside of that you`ll wanna go aftermarket ECU for a heap of reasons.

Fitting a "stage 2" type cam/lifters aint much...$500 with new chain, spend $250-300 on cleaning the head up-nothing major,quick clean and valve lap, get it shaved, reassemble everything your self, assuming all is good you`d expect 140-150hp with an exhaust. box and diff ratio play a big part in the deal too...that`d keep me happy enuff... :wink: for a while

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Posted: Sun Dec 31, 2006 12:23 am 
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pick up a cheap 2nd hand xflow250 turbo kit :D
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Posted: Mon Jan 01, 2007 10:20 am 
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Yep...then try to find a cheap aftermarket ECU...make sure the engines in good shape first...nothing ends up cheap with turbo setups

JAIKAI
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Posted: Mon Jan 01, 2007 1:42 pm 
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put a 4.0L in it, i wish i did it to my old xf.

 

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Posted: Mon Jan 01, 2007 6:03 pm 
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Quote:
you have to be kidding right?

Whats wrong with stroking a 4.1?

 

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Posted: Mon Jan 01, 2007 6:43 pm 
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Its nearly at its limit anyway, stroking it would do nothing dude.. Same as 4litres, notice how nobody strokes them?

 

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Posted: Mon Jan 01, 2007 6:58 pm 
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idd say fit a EL 4.0 litre into it. although im unsure of the costs involved. althought there is a feir few poeple who have done it now.

 

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Posted: Mon Jan 01, 2007 7:35 pm 
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Well i thought i would mention it as my mate has an XF & the cam is that 'big' the motor had to be stroked. Dont ask me how it all works, im just going on what he had told me.

 

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Posted: Mon Jan 01, 2007 9:36 pm 
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SleeperEL wrote:
Quote:
you have to be kidding right?

Whats wrong with stroking a 4.1?


The ford 6's stroke is already horribly long. Making it longer has a lot of disadvantages and marginal advantages. Overall stroking the 6's is a relatively expensive and futile exercise.

Most of the serious 6's modify the bottom ends to try and get around the disadvantage of the already long stroke. Fitting the longer 200ci rods to the 250ci crank with hi-pin pistons improves the rod ratio to help get some more RPM out of them safely. ACL make a couple of special pistons just for this combo.

Personally I think their is a real case for destroking the I6 engines.

 

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Posted: Tue Jan 02, 2007 8:26 am 
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True...some ppl just say things without thinkin`...you can stroke a crossflow6, no question...you would`nt do it cause of a cam though, someones dreamin`...but for the money and time involved, you`d get a better result working up a 4.0 or a decent V8...both of which will fit...

I think ppl have lost the meaning of the original post...what exhaust and little mods can he do...? that rules out turbo or stroking the engine...

JAIKAI
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