4.142 crank

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4.142 crank

Post  Bluemule on January 18th 2013, 10:25 pm

I tried the search and I'm unable to find any flat top forged pistons with scj/p51 valve reliefs for a 4.142 offset ground factory crank. Even checking web sights all I can find is for 4.150. Any help would be greatly appreciated.
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Re: 4.142 crank

Post  Frank Merkl on January 18th 2013, 11:00 pm

use the ones for 4.150 stroke
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Re pistons

Post  Bluemule on January 18th 2013, 11:21 pm

Thanks Frank, been a few years since chatting with you. Ill be looking for some advice for the c6 in the near future. Looking forward to getting back in the game.
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Re: 4.142 crank

Post  schmitty on January 18th 2013, 11:21 pm

Do like Frank said, or just order a set of Diamond pistons with custom offset to your specs. They will make you what ever you want.
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Re: 4.142 crank

Post  IDT-572 on January 19th 2013, 12:18 am

Your only talking about .004 difference lower in the bore.
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.004?

Post  Bluemule on January 19th 2013, 1:32 am

IDT-572 wrote:Your only talking about .004 difference lower in the bore.
I dont mean to second guess you but how do you come up with .004 in the bore I thought there was an .008 difference please forgive the ignorance. I want did build the engine for e85 since the pump gas in west Texas sucks 91 octane at best and Im starting from scratch. I'm looking to make some decent compression with scj or p51 heads. I got a c9 block haven't checked the deck hight yet but aren't they 10.320? Thanks again
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Re: 4.142 crank

Post  Frank Merkl on January 19th 2013, 2:16 am

it will only be ,004 difference in deck height not bore
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Re: 4.142 crank

Post  2fox on January 19th 2013, 10:57 am

IDT-572 wrote:Your only talking about .004 difference lower in the bore.
yes half of 8 is 4.
what's the deck clearance we need to shoot for? .010 in the hole ? Thanks
I know the right way is to install all the pistons correct? Not just 1. Then see how much to take off right?
I go with the 4 square decking. Let us know Thanks

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Re: 4.142 crank

Post  dfree383 on January 19th 2013, 12:43 pm

I typically shoot for 0 deck and run a .043-.045 head gasket.
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Re: 4.142 crank

Post  2fox on January 19th 2013, 12:55 pm

dfree383 wrote:I typically shoot for 0 deck and run a .043-.045 head gasket.
OK thanks dfree. Sorry we butted some heads awhile back.Are we cool? I finally got A BBF now so I have lots of questions. I don't want to do something or buy something wrong and have to start and have to start all over again.

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Makes sense

Post  Bluemule on January 19th 2013, 8:36 pm

2fox wrote:
IDT-572 wrote:Your only talking about .004 difference lower in the bore.
yes half of 8 is 4.
what's the deck clearance we need to shoot for? .010 in the hole ? Thanks
I know the right way is to install all the pistons correct? Not just 1. Then see how much to take off right?
I go with the 4 square decking. Let us know Thanks
[list][*] thanks for all the input y'all wish I could find others using this stroke combination. I'm wanting to run scj or p51 heads on a mainly strip fox hatch with a couple of show off nights up to sonics ever so often. Thanks again
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Re: 4.142 crank

Post  2fox on January 19th 2013, 9:25 pm

I got a few post with my wish list on here LOL.

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Re: 4.142 crank

Post  dfree383 on January 19th 2013, 11:02 pm

2fox wrote:
dfree383 wrote:I typically shoot for 0 deck and run a .043-.045 head gasket.
OK thanks dfree. Sorry we butted some heads awhile back.Are we cool? I finally got A BBF now so I have lots of questions. I don't want to do something or buy something wrong and have to start and have to start all over again.

No issues here. Ask away.
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Re: 4.142 crank

Post  2fox on January 19th 2013, 11:31 pm

dfree383 wrote:
2fox wrote:
dfree383 wrote:I typically shoot for 0 deck and run a .043-.045 head gasket.
OK thanks dfree. Sorry we butted some heads awhile back.Are we cool? I finally got A BBF now so I have lots of questions. I don't want to do something or buy something wrong and have to start and have to start all over again.

No issues here. Ask away.
click my name see my recent post. In tech and transmissions.
iam back I my anti- depression medication. Plus I finally got my 2003 Cobra running after 1000 days. Big load has been lifted off of me. I feel better a lot better now. Just check them out. Just give me your opinions . Thanks am A BBF man now Smile

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