How much boost can i run through a 205 block +1mm rebore?
25-10-2004, 12:56 PM
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How much boost can i run through a 205 block +1mm rebore?
Just a simple question, safe limit i can run, it also has oversized 4x4 pistons and the engine is about 9k old 
cheers, pete
cheers, pete
25-10-2004, 01:00 PM
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1 mm ? oversize pistons are either 0.25 or 0.50 i reckon that's in mm's
when u will hit full boost the crank will find its way to the tarmac and the pistons will fly trought the head in a figure of speech as the kind gent told me whilst i was on the phone with him.
as i assume its like reboring the block to 2.1 litres?
if not i am mistaken otherwise ignore it
when u will hit full boost the crank will find its way to the tarmac and the pistons will fly trought the head in a figure of speech as the kind gent told me whilst i was on the phone with him.
as i assume its like reboring the block to 2.1 litres?
if not i am mistaken otherwise ignore it
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25-10-2004, 01:05 PM
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Originally Posted by Rene
1 mm ? oversize pistons are either 0.25 or 0.50 i reckon that's in mm's
when u will hit full boost the crank will find its way to the tarmac and the pistons will fly trought the head in a figure of speech as the kind gent told me whilst i was on the phone with him.
as i assume its like reboring the block to 2.1 litres?
if not i am mistaken otherwise ignore it
when u will hit full boost the crank will find its way to the tarmac and the pistons will fly trought the head in a figure of speech as the kind gent told me whilst i was on the phone with him.
as i assume its like reboring the block to 2.1 litres?
if not i am mistaken otherwise ignore it
25-10-2004, 01:05 PM
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Originally Posted by ian m
i ran 2.4 bar no problems my mate also runs the same and that is + 1mm also
25-10-2004, 01:06 PM
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I wouldn't put much more than standard boost through a 1mm rebore on a 205block mate, there won't be very much strength left in it at all I'm affraid 
25-10-2004, 01:08 PM
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Originally Posted by ian m
i ran 2.4 bar no problems my mate also runs the same and that is + 1mm also
You must be one lucky bastard Ian!
25-10-2004, 01:09 PM
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Originally Posted by TIFF-C20WTH
Originally Posted by Jim Galbally
its a peice of string with a ruler next to it...
Ever heard of the expression "how long's a peice of string?" 
25-10-2004, 01:10 PM
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Originally Posted by Ian2wdsaffcos
Originally Posted by TIFF-C20WTH
Originally Posted by Jim Galbally
its a peice of string with a ruler next to it...
Ever heard of the expression "how long's a peice of string?"
25-10-2004, 01:11 PM
#20
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Originally Posted by Ian2wdsaffcos
Originally Posted by TIFF-C20WTH
Originally Posted by Jim Galbally
its a peice of string with a ruler next to it...
Ever heard of the expression "how long's a peice of string?" How long is a peice of string
Twice the length from the centre to the end
25-10-2004, 01:14 PM
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Originally Posted by TIFF-C20WTH
Originally Posted by Ian2wdsaffcos
Originally Posted by TIFF-C20WTH
Originally Posted by Jim Galbally
its a peice of string with a ruler next to it...
Ever heard of the expression "how long's a peice of string?" How long is a peice of string
Twice the length from the centre to the end
25-10-2004, 01:15 PM
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Why the hell would the do the flex rating of the block in bhp?? Did you just make that up??
By its nature it would be a peak torque figure that would cause damage to the block!
By its nature it would be a peak torque figure that would cause damage to the block!
25-10-2004, 01:16 PM
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TIFF - i have a reciept with the car when the engine was rebuilt as i think it let a piston go and must have scored the bores inside, so the above is what they replaced it with, yours is standard isn't mate?
25-10-2004, 01:20 PM
#35
so if we rebuild our 205 block, and had it re-bored and used oversized 4x4 mahle pistons, re-ground/polished the crank ect ect ec ran it all in, and then put it back to stg3 (t34, greens, stg3 chip, 3 bar map sensor ect ect)
with a compression ratio of 8:1 what would be a sensible boost limit? 26psi?
would it all hold together?
with a compression ratio of 8:1 what would be a sensible boost limit? 26psi?
would it all hold together?
25-10-2004, 01:23 PM
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Originally Posted by smidsy
so if we rebuild our 205 block, and had it re-bored and used oversized 4x4 mahle pistons, re-ground/polished the crank ect ect ec ran it all in, and then put it back to stg3 (t34, greens, stg3 chip, 3 bar map sensor ect ect)
with a compression ratio of 8:1 what would be a sensible boost limit? 26psi?
would it all hold together?
with a compression ratio of 8:1 what would be a sensible boost limit? 26psi?
would it all hold together?
25-10-2004, 01:25 PM
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How many times has the engine been rebuilt mate as normally people go to 0.25mm oversize, then 0.5mm...............
25-10-2004, 01:38 PM
#40
to answer ur other question, to rebore to a 2.1 u need 3mm ( or a bore to 93mm )oversized pistons but i dont know if u can get them for a cossie ( im sure someone would make them). i think this takes it to 2093 cc or something. but then i am going on experience from a pinto. so could advise weather safe or not on a cossie ( but i wouldnt think so ) as that is the max safe limit (although unpredicable ) of a n/a pinto. hope this helps