Whats the better piston. C20XE or Accrilte?
#1
Wye Valley Hardcore
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Whats the better piston. C20XE or Accrilte?
I'm going to build up a new bottom end as mine currently has I need to fit mine with steel rods and has a little piston slap, it's irritating me sounding like a deisel. But what pistons shall I use?
My current bottom end has Accrilite Forged pistons, but I found a set of early Mahle Forged C20XE pistons (very very cheap) so bought them. Which would be better? I know the XE pistons will give me comp ratio of 7.8:1 with a CVH head and Focus RS headgasket IIRC but not sure what the Accrilites have been machined to?
Also the Accrilites have been machined with flat crowns and I have been told that at higher boost they will possibly damage?
My current bottom end has Accrilite Forged pistons, but I found a set of early Mahle Forged C20XE pistons (very very cheap) so bought them. Which would be better? I know the XE pistons will give me comp ratio of 7.8:1 with a CVH head and Focus RS headgasket IIRC but not sure what the Accrilites have been machined to?
Also the Accrilites have been machined with flat crowns and I have been told that at higher boost they will possibly damage?
#3
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how do you know xe pistons will give you 7.4? Thy're for i highish power normally aspirated engine which usually means high compression. Whats the difference between the xe pistons and the let pistons that are normally used?
#6
Wye Valley Hardcore
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It's something to do with the cvh head having a bigger combustion area than the zetec head. CVH being 55mm to the zetecs 48mm? IIRC. Because of this the LET pistons will give a comp ratio too low for ZVH so higher comp XE's are used.
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#8
Wye Valley Hardcore
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Right then. Sell the accrilites and use the XE's. Next question is what steel rods shall I use? I know the little ends Need opening up from 20.83 (?) to 21mm for the vaux wrist pin but would Eagle rods be ok to use? I heard something about them being the wrong length so messes up the comp ratio?
#11
Wye Valley Hardcore
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With a forged bottom end and the rest of my set up I should be able to see 300 bhp with a turbo swap which is plenty through the front wheels.
#12
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Mainly due to the fact I have a very well specc'd CVH head modified to use a Zetec headgasket which has a brand new Newman cam and solid lifters which I would loose alot of money on if I went Zetec and had to sell it. Plus I do like the way the Ford motorsport rocker cover and custom XR3 inlet look in the bay.
With a forged bottom end and the rest of my set up I should be able to see 300 bhp with a turbo swap which is plenty through the front wheels.
With a forged bottom end and the rest of my set up I should be able to see 300 bhp with a turbo swap which is plenty through the front wheels.
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