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M4VR1K
 Post subject: overboring
PostPosted: Sun Jun 06, 2004 3:11 am 
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any idea what a N/A 4G63 can be bored out to?

Zac

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The Ethereal
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PostPosted: Sun Jun 06, 2004 6:12 am 
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I'd like to know, too. Probably at least to 87.5mm, it's the bore of the 4G64. 8)

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mysteryman
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PostPosted: Sun Jun 06, 2004 6:48 am 
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Stock bore is 86.5mm on a 2.4L. You can bore a 4G64 block safely to 87.5 mm. SO from what I understand from Weisco they have had customer bore 4G63 blocks to 87.5 mm also.
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mysteryman
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PostPosted: Sun Jun 06, 2004 6:49 am 
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You piston cost will be around $420.00 for a set of forges sisnce no one makes cast pistons that large.
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M4VR1K
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PostPosted: Sun Jun 06, 2004 6:51 am 
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the big question is, would it be worth it in terms of HP gain?

i mean, going from a 2 liter to a 2.4, thats quite a lot

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dsmracer
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PostPosted: Sun Jun 06, 2004 8:28 am 
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Quote:
the big question is, would it be worth it in terms of HP gain?

i mean, going from a 2 liter to a 2.4, thats quite a lot
Keep in mind you'd need the 2.4L crank to make it a true 2.4L. Otherwise it's probably more like 2.1L.

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Berserko
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PostPosted: Sun Jun 06, 2004 8:59 am 
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Quote:
Quote:
the big question is, would it be worth it in terms of HP gain?

i mean, going from a 2 liter to a 2.4, thats quite a lot
Keep in mind you'd need the 2.4L crank to make it a true 2.4L. Otherwise it's probably more like 2.1L.
And still that won't give you 2.4L it will only give you 2.3L because 4g64 has extra deck height. Just by a 4g64 and be done with the boring...
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FatBastard
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PostPosted: Mon Jun 07, 2004 4:52 am 
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Quote:
Quote:
Quote:
the big question is, would it be worth it in terms of HP gain?

i mean, going from a 2 liter to a 2.4, thats quite a lot
Keep in mind you'd need the 2.4L crank to make it a true 2.4L. Otherwise it's probably more like 2.1L.
And still that won't give you 2.4L it will only give you 2.3L because 4g64 has extra deck height. Just by a 4g64 and be done with the boring...
Actually, thats wrong. You *can* make a 2.4L out of a 4G63 block, you jsut need to move the pin of the piston up the skirt 6mm so you don't punch it through the head. 2.3L engines are 85mm (stock 2.0 bore) x 100mm (4G64 crank).

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