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What can i do to a 250crossflow for drags and burnouts 

 

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 Post subject: What can i do to a 250crossflow for drags and burnouts
Posted: Thu Sep 08, 2005 7:12 pm 
Getting Side Ways
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Hi all
what i want to do is, Do up my xf 250 crossflow
i went in a burn out comp and finshed 3rd but it was still lacking power
i want 2 know what i can do to a carby motor? it doesn't if it lumpy a s**t it's doesnt have 2 b street legal it's for burnouts and drags thats it's only use. i was thinkin a crow cam part no. 14770 i have put a holley 350 2brl carby on it, i dont want 2 put a snail on it of any thing like that, what kind of roller rockers and lifters do i need for this and what bearings do i need for the bottem end, does any 1 know where i can get a surge tank round 1.5 lt tank under $200 thats just f**k.en nuts
help me do the XF 250 PROUD :lol:

 

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 Post subject: Re: What can i do to a 250crossflow for drags and burnouts
Posted: Thu Sep 08, 2005 7:24 pm 
Getting Side Ways
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efbignik wrote:
Hi all
what i want to do is, Do up my xf 250 crossflow
i went in a burn out comp and finshed 3rd but it was still lacking power
i want 2 know what i can do to a carby motor? it doesn't if it lumpy a s**t it's doesnt have 2 b street legal it's for burnouts and drags thats it's only use. i was thinkin a crow cam part no. 14770 i have put a holley 350 2brl carby on it, i dont want 2 put a snail on it of any thing like that, what kind of roller rockers and lifters do i need for this and what bearings do i need for the bottem end, does any 1 know where i can get a surge tank round 1.5 lt tank under $200 thats just f**k.en nuts
help me do the XF 250 PROUD :lol:

 

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Posted: Thu Sep 08, 2005 7:41 pm 
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You want roller rockers? How hard do you plan on revving the thing? What are your diff gears?
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Posted: Thu Sep 08, 2005 8:00 pm 
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the way you have said you want to go is the go, lol.

350 holley with a redline manifold and a good set of extractors and exhaust is your first step, dont worry about roller rockers and a huge cam, the 250 is a nice torquey engine that doesnt need to rev its tits off, get a cam to take advantage of the torque you have already got, something that works from 2000-5000 is perfect.

i would go for around a 3.5:1 diff, locked of cause :)

 

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Posted: Thu Sep 08, 2005 8:11 pm 
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i agree with yobbo,, thats basically whats in mine

350holley, redline manifold, extractors, zorst and a 1800-4800 cam... 9.8:1 comp... runs great.. all i need is a shorter diff and all is good..
nice torque and it revs smooth as


also if its for off street remove ALL the polution gear


-mitch

 

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Posted: Thu Sep 08, 2005 9:52 pm 
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mitchg911 wrote:
i agree with yobbo,, thats basically whats in mine

350holley, redline manifold, extractors, zorst and a 1800-4800 cam... 9.8:1 comp... runs great.. all i need is a shorter diff and all is good..
nice torque and it revs smooth as


also if its for off street remove ALL the polution gear


-mitch


The mods you mentioned were close to the TE cortina that my son had done before the V8 conversion and that with a 3.9 diff & the head of a injected mtr run a best of I think was either a 14.8 or 14.9

ghiaman

 

 

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Posted: Thu Sep 08, 2005 11:03 pm 
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xcabbi wrote:
You want roller rockers? How hard do you plan on revving the thing? What are your diff gears?


*what kind of rockers? where from? who makes the best? how much ?
* its got 2.92:1 LSD Diff
* Are the holly 350 a good carby ?
* i want Big Power i want 2 win my drags
*I want it to go as hard as it can i got some cash stashed a way for this so i want 2 make it like a dream 250xflow motor

 

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Posted: Thu Sep 08, 2005 11:55 pm 
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YOU WANNTED 2 SEE IT HERE IT IS

 

 

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 Post subject: Re: What can i do to a 250crossflow for drags and burnouts
Posted: Fri Sep 09, 2005 3:57 pm 
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efbignik wrote:
Hi all
what i want to do is, Do up my xf 250 crossflow
i went in a burn out comp and finshed 3rd but it was still lacking power
i want 2 know what i can do to a carby motor? it doesn't if it lumpy a s**t it's doesnt have 2 b street legal it's for burnouts and drags thats it's only use. i was thinkin a crow cam part no. 14770 i have put a holley 350 2brl carby on it, i dont want 2 put a snail on it of any thing like that, what kind of roller rockers and lifters do i need for this and what bearings do i need for the bottem end, does any 1 know where i can get a surge tank round 1.5 lt tank under $200 thats just f**k.en nuts
help me do the XF 250 PROUD :lol:
The rods are a weak link in the crossflow 250. Carby wise a 465cfm Holley 4 barrel will outdo the 350 anyday! but fuel wise you will know it. John Cain makes Cain manifolds or used to make them for the Xflow 250(Newcastle NSW).
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