LSX bigger that 454 out there?
08-15-2007, 10:13 PM
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LSX bigger that 454 out there? Is anyone building a new LSX with more than 454 CI? I think I read that these blocks can go up to 500+ CI. Anyone actually building one now?
thanks
thanks
08-16-2007, 11:10 AM
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would one of those rev faster than a 454? I know that it depends on bore and stroke size but how much extra is a 500+ ci worth in hp compared to a 454?
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08-16-2007, 03:46 PM
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Hey ARDLS1,
do you have any numbers for the 454?
would the 4.25 bore x 4.5 stroke be able to rev as high and fast as something with a little shorter stroke, I guess I always thought the longer the stroke the longer it takes to rev up to say 6000 or 7000 rpm
do you have any numbers for the 454?
would the 4.25 bore x 4.5 stroke be able to rev as high and fast as something with a little shorter stroke, I guess I always thought the longer the stroke the longer it takes to rev up to say 6000 or 7000 rpm
08-16-2007, 04:02 PM
#12
Originally Posted by dads toy
Hey ARDLS1,
do you have any numbers for the 454?
would the 4.25 bore x 4.5 stroke be able to rev as high and fast as something with a little shorter stroke, I guess I always thought the longer the stroke the longer it takes to rev up to say 6000 or 7000 rpm
do you have any numbers for the 454?
would the 4.25 bore x 4.5 stroke be able to rev as high and fast as something with a little shorter stroke, I guess I always thought the longer the stroke the longer it takes to rev up to say 6000 or 7000 rpm
As far as how fast it revs, yes a shorter stroke should rev a little quicker, but with the correct rotating assembly and flywheel, it should rev plenty fast
08-16-2007, 04:16 PM
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I have a low compression 454 LSX its 4.200 Bore X 4.100 Stroke.
Its boosted with an STS turbo, we are going with custom Twins for it now. At the builders shop we have an all motor 472CI LSX motor on the run stand now.
Its boosted with an STS turbo, we are going with custom Twins for it now. At the builders shop we have an all motor 472CI LSX motor on the run stand now.
08-16-2007, 04:32 PM
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Originally Posted by Stang's Bane
No, it can go up to 511 CI
4.25 bore x 4.5 stroke
4.25 bore x 4.5 stroke
Course it can, but theirs no cometic head gasket for that size, unless you want copper gaskets.
4.5 stroke.......... you would have a compression height of .895
We won't build a motor with over 4.000" stroke unless its a C5R block or tall deck.
08-16-2007, 04:51 PM
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Our 455 lsx is a 1s7x warhawk headed hyd. roller carb intake, elbow efi, TH 400, 3800 stall, 12 bolt. It made 504hp and 462 tq on a very consertaive tune. We are spinnig it to 7000 makes power all the way up.
08-16-2007, 11:41 PM
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Expert engine builder ERIK KOENIG has informed me that a 482 cubed LSX motor with perfectly square 4.25 bore x 4.25 stroke is very doable on the current short deck LSX block on the market (as long as its for a N/A application which my future motor will be). Now if only I had an extra $12K laying around! Someday, hopefully sooner than later! 
08-17-2007, 07:44 AM
#17
Originally Posted by Fraser@SpeedInc
Course it can, but theirs no cometic head gasket for that size, unless you want copper gaskets.
4.5 stroke.......... you would have a compression height of .895
We won't build a motor with over 4.000" stroke unless its a C5R block or tall deck.
4.5 stroke.......... you would have a compression height of .895
We won't build a motor with over 4.000" stroke unless its a C5R block or tall deck.
08-17-2007, 09:34 AM
#18
Originally Posted by Fraser@SpeedInc
Course it can, but theirs no cometic head gasket for that size, unless you want copper gaskets.
4.5 stroke.......... you would have a compression height of .895
We won't build a motor with over 4.000" stroke unless its a C5R block or tall deck.
4.5 stroke.......... you would have a compression height of .895
We won't build a motor with over 4.000" stroke unless its a C5R block or tall deck.
D.J.
