Has anyone used a LS7 crank to stroke a LS1/2/6??
#21
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Originally Posted by 427 LS1
Don't forget the LS7 has a pretty light rotating assembly, you will most likely have to add heavy metal to it to make it balance. I haven't had to add metal with the Eagles or the Callies cranks. I have had a LS7 crank snout shortened and swapped reluctor wheels, it turned out great but if you are using a forged rotating assembly it will end being a more expensive endeavor, plus the LS7 is 4130 all the others are 4340.
#22
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Originally Posted by KRAZY K 2000 TA
thats an ignorant statement. . .
C'mon guys, I'm tryin to sort through this LS7 crank deal. I can start you a separate "love eagle, hate eagle" thread if it'll help.
Anyway, it doesn't look like many (if any) have run a LS7 crank with forged rods and pistons. I'm going to go ahead and put one together, won't be for a couple months (don't want to disable the car until winter). I'll keep you posted with the results. Maybe it'll maybe not
#25
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Uh I guess it hasn't been mentioned yet but the LS7 crank is slightly longer due to the dry sump oil system.
You would need to make some changes to allow the LS7 to be used in a LS1/LS2/L92 block.
You would need to make some changes to allow the LS7 to be used in a LS1/LS2/L92 block.
#26
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Originally Posted by Bring the Noise
Uh I guess it hasn't been mentioned yet but the LS7 crank is slightly longer due to the dry sump oil system.
You would need to make some changes to allow the LS7 to be used in a LS1/LS2/L92 block.
You would need to make some changes to allow the LS7 to be used in a LS1/LS2/L92 block.
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Originally Posted by Ferocity02
Never thought about that. Yeah, with heavy duty 4340 rods and large pistons the LS7 crank will need some serious heavy metal.
with Titanium connecting rods i would think that the LS7 crank would need alot of metal to balance it.
#32
uh... jfc did I just find the birthplace of the 383 ls stroker?
im trying to do a 360 stroker with a cast iron 5.3, shortened ls7 crank AND rods, and lightly reworked 862 heads.
im building it for adapter plates and an LSA blower
will the stock ls7 rotating assembly handle the lsa blower? im adding forced induction but reducing the displacement theyre built for by 67 cubes so... ?
im not really sure what to expect from a build like this
gobs of instant torque from a smaller motor is the idea.
smallest bore, longest stroke, boost on demand, right?
im trying to do a 360 stroker with a cast iron 5.3, shortened ls7 crank AND rods, and lightly reworked 862 heads.
im building it for adapter plates and an LSA blower
will the stock ls7 rotating assembly handle the lsa blower? im adding forced induction but reducing the displacement theyre built for by 67 cubes so... ?
im not really sure what to expect from a build like this
gobs of instant torque from a smaller motor is the idea.
smallest bore, longest stroke, boost on demand, right?
#33
No
The LS7 crank is nothing to write home about, and cannot be used with heavier steel rods. The crank and rods are worth some money to LS7 builders, though, so think about that.
Adapting square port to cathedral port always loses a lot of flow.
Based on your parts list, headaches and if you do get it assembled you will not get as much power as you thought you would get.
Torque is not a function of stroke length. All cubic inches are created equal. This has been proven over and over on dynos and nobody has ever produced a data point that counteracts it.
If you want an engine that makes snappy torque, have the combination make sense.
Adapting square port to cathedral port always loses a lot of flow.
Based on your parts list, headaches and if you do get it assembled you will not get as much power as you thought you would get.
Torque is not a function of stroke length. All cubic inches are created equal. This has been proven over and over on dynos and nobody has ever produced a data point that counteracts it.
If you want an engine that makes snappy torque, have the combination make sense.
The following 2 users liked this post by Kawboom:
Che70velle (07-25-2024), G Atsma (07-25-2024)
#34
Yes it can. It will just cost a ton of money to balance. Better off starting with an aftermarket crank.
#36
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You can always run billet aluminum rods for the machined LS7 crank. Won't have to use all that mallory to balance but the connecting rods aren't cheap either.