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Author machining pistons
fazza
Member
Registered: 7th Feb 08
Location: Plymouth
User status: Offline
15th Oct 08 at 09:45   View User's Profile U2U Member Reply With Quote
has anyone done this to lower compression? i just want to take a skim off them to lower compression rather than using a decompression plate.
Cossie
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Registered: 17th May 02
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15th Oct 08 at 09:52   View User's Profile U2U Member Reply With Quote
better lower the compression from cylinder head and thicker gasket
john_c20xe
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Registered: 10th Feb 08
Location: Eastbourne, EastSussex
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15th Oct 08 at 10:09   View User's Profile U2U Member Reply With Quote
i also want to get my pistons machined so i can get lairy cams without the valves hitting?
fazza
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Registered: 7th Feb 08
Location: Plymouth
User status: Offline
15th Oct 08 at 10:11   View User's Profile U2U Member Reply With Quote
u need pcoketed pistons john. they different mate.

what u mean cossie? if i run thicker gasket then i cant run any decent boost.

want to maching the crown down slightly
Cossie
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Registered: 17th May 02
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15th Oct 08 at 11:15   View User's Profile U2U Member Reply With Quote
you can get a bit thicker than standard size gasket should be no problem but better if you can lower compression from head more easy !
fazza
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Registered: 7th Feb 08
Location: Plymouth
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15th Oct 08 at 11:19   View User's Profile U2U Member Reply With Quote
uve confused me??

im going to be using standard gaskets
gazza808
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Registered: 30th Jun 08
Location: Peterborough
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15th Oct 08 at 15:33   View User's Profile U2U Member Reply With Quote
any decent machine shop can do it easy. Don't take too much off or the crown thickness will be to thin
fazza
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Registered: 7th Feb 08
Location: Plymouth
User status: Offline
15th Oct 08 at 15:39   View User's Profile U2U Member Reply With Quote
any idea how much i can get away with gazza?

need chop a piston in half i think and see what i can get away with
gazza808
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Registered: 30th Jun 08
Location: Peterborough
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15th Oct 08 at 15:43   View User's Profile U2U Member Reply With Quote
with out actully checking for my self about 1.5mm depends what boost you'll be running and mapping etc. Like on the 2litre 8v's ya just machine the dish abit deeper to lower the compression.
fazza
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Registered: 7th Feb 08
Location: Plymouth
User status: Offline
15th Oct 08 at 15:45   View User's Profile U2U Member Reply With Quote
sweet. will cut one in half then get some pics up
sand-eel
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Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
User status: Offline
15th Oct 08 at 15:47   View User's Profile U2U Member Reply With Quote
can you afford £500 for new low comp forged pistons? i would get them.
fazza
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Registered: 7th Feb 08
Location: Plymouth
User status: Offline
15th Oct 08 at 15:50   View User's Profile U2U Member Reply With Quote
i could but that would hold the project even further

rather just uprate the conrod bolts and machine the pistons if i can get away with it.
gazza808
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Registered: 30th Jun 08
Location: Peterborough
User status: Offline
15th Oct 08 at 15:51   View User's Profile U2U Member Reply With Quote
also there's the fact how much boost do you want to run? Decent intercooler and decent mapping could see a 1bar on standard pistons seen it in a few saxo's
fazza
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Registered: 7th Feb 08
Location: Plymouth
User status: Offline
15th Oct 08 at 15:52   View User's Profile U2U Member Reply With Quote
will have decent intercooler. be using standard mapping to start with, with an adjustable fpr and 2.0 injectors.
will get gotech in the future
Torsa g
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Registered: 20th Sep 07
Location: Tamworth. Rides: An OSTRIDGE
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15th Oct 08 at 15:54   View User's Profile U2U Member Reply With Quote
go for it mate, some times you just gotta budget it, so many people can tell u ur wrong but at the end of the day if it works that 500 buff in ur pocket
Torsa g
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Registered: 20th Sep 07
Location: Tamworth. Rides: An OSTRIDGE
User status: Offline
15th Oct 08 at 15:55   View User's Profile U2U Member Reply With Quote
shup nbe able to see alrite gains of a remap and a rise n rate fuel reg
fazza
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Registered: 7th Feb 08
Location: Plymouth
User status: Offline
15th Oct 08 at 15:55   View User's Profile U2U Member Reply With Quote
yeh true tom.

now sellm me your bonnet
Torsa g
Member
Registered: 20th Sep 07
Location: Tamworth. Rides: An OSTRIDGE
User status: Offline
15th Oct 08 at 16:01   View User's Profile U2U Member Reply With Quote
swap for the engine yeah



[Edited on 15-10-2008 by Torsa g]
fazza
Member
Registered: 7th Feb 08
Location: Plymouth
User status: Offline
15th Oct 08 at 16:02   View User's Profile U2U Member Reply With Quote
as it is now, yeh sure

just an x16xe atm lol
andyc1234
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Registered: 7th Nov 06
Location: Lancashire
User status: Offline
15th Oct 08 at 16:51   View User's Profile U2U Member Reply With Quote
getting a move on with it i see
fazza
Member
Registered: 7th Feb 08
Location: Plymouth
User status: Offline
15th Oct 08 at 17:41   View User's Profile U2U Member Reply With Quote
yes mate, no point hanging about

 
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