LS1TECH - Camaro and Firebird Forum Discussion

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-   -   Correct me if I'm wrong (https://ls1tech.com/forums/generation-iii-internal-engine/408338-correct-me-if-im-wrong.html)

JEB99TA Nov 12, 2005 06:32 AM
Correct me if I'm wrong
 
I've seen posts with LS1's listed as 347's. The original bore is 3.898 (according to JRP's FAQ section[and quoted from Chevy High Performance magazine]).

Mine was just forged and bored to 3.905, is it still a 346 or is it a 347 now? :confused:

orangeapeel Nov 12, 2005 06:38 AM
Maybe from pistons????

JEB99TA Nov 12, 2005 08:23 AM
Yeah, a Mahle forged piston kit was installed. The stock displacement is actually 345.8 thus, making it a 346 CID. Though most people could probably care less, I was just curious if the +.007 bore would make the math work out to give it a 347 CID. Apples and oranges, I guess.

jrp Nov 13, 2005 05:20 AM
Originally Posted by JEB99TA
Yeah, a Mahle forged piston kit was installed. The stock displacement is actually 345.8 thus, making it a 346 CID. Though most people could probably care less, I was just curious if the +.007 bore would make the math work out to give it a 347 CID. Apples and oranges, I guess.
3.905 bore
3.622 stroke

=

347.032693279965

JEB99TA Nov 13, 2005 03:27 PM
Thanks Jerami. ... always there when I need you. I'll threaten you now ... one of these days I'll get to Cali to look you up. :jest:

You've been a true friend for quite awhile now. You're appreciated man.

:cheers:


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