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250 crossflow 

 

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 Post subject: 250 crossflow
Posted: Tue Jul 03, 2012 10:22 pm 
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Age: 23

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Joined: 21st Jun 2012

Ride: 1967 XR fairmont

Location: bendigo
VIC, Australia

i have a 250 crossflow has 2 barrel webber on it nothing special, what the mac power i can get this to pull? without a supercharger or a turbo, 270-277 bore and stroke? dont want insain power just a large improvement, has to be lumpy as possible though, ideas/know setups?
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 Post subject: Re: 250 crossflow
Posted: Wed Jul 04, 2012 1:42 am 
Getting Side Ways
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Joined: 18th Dec 2006

Ride: 93 ED sedan

Power: 161 rwkw

Location: Rockhampton
QLD, Australia

Lonnie wrote:
i have a 250 crossflow has 2 barrel webber on it nothing special, what the mac power i can get this to pull? without a supercharger or a turbo, 270-277 bore and stroke? dont want insain power just a large improvement, has to be lumpy as possible though, ideas/know setups?


There is heaps that can be done.....just depends on what you wanna spend?????

 

 

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 Post subject: Re: 250 crossflow
Posted: Wed Jul 04, 2012 6:14 am 
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Ride: 1991 eb1 fairmont

Location: townsville
QLD, Australia

c1 head, mild cam, headers+2.25" exhaust are a good start, also trim back the factory aircleaner housing into a sports.
mild cam = more usable power across the rev range, too lumpy = broken things and not very nice to drive on the street.(been there even snapped my cam)
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 Post subject: Re: 250 crossflow
Posted: Wed Jul 04, 2012 8:47 am 
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Ride: XH Ute / AU3 V8 Wagon

Location: Bris-Vegas
QLD, Australia

Don't waste the money on the 250, rip it out and stuff an AU 4.0l in there. Even stock with extractors, a 2 barrel carb and the XF dizzy setup it will sh!t all over a mild to tuff 250. And you will save a fortune. Don't believe me? Do some research and then do the sums.
Good luck.
8-)

 

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 Post subject: Re: 250 crossflow
Posted: Wed Jul 04, 2012 10:34 pm 
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Age: 23

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Joined: 21st Jun 2012

Ride: 1967 XR fairmont

Location: bendigo
VIC, Australia

iv got a tickford 6 ready i believe you, but i dont want ugly fuel injection, and if i run carbys on it and get caught i loose 3 demerit points, im on my Ps so i only get a total of 5 anyways, i have 1 year and a half off school and will be working full time, dont pay rent nothing, i got quoted 7000 for a 365hp crossflow setupm but id rather it be lump as all hell then screaming, so thats why im thinkin the 277 but dont know much about it
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 Post subject: Re: 250 crossflow
Posted: Thu Jul 05, 2012 10:44 am 
Getting Side Ways
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Age: 49

Posts: 6467

Joined: 18th Dec 2006

Ride: 93 ED sedan

Power: 161 rwkw

Location: Rockhampton
QLD, Australia

Lonnie wrote:
iv got a tickford 6 ready i believe you, but i dont want ugly fuel injection, and if i run carbys on it and get caught i loose 3 demerit points, im on my Ps so i only get a total of 5 anyways, i have 1 year and a half off school and will be working full time, dont pay rent nothing, i got quoted 7000 for a 365hp crossflow setupm but id rather it be lump as all hell then screaming, so thats why im thinkin the 277 but dont know much about it


Believe me, a 365hp, 250 xflow, will be very cranky.

 

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