Can an LT1 be bored and stroked to a 427?
10-28-2005, 04:03 AM
#1
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Can an LT1 be bored and stroked to a 427? Can a Lt1 be bored and stroked to a 427? I am sure if it is possible it would have to be resleeved? Can a stock PCM be tuned for a procharged 427 CI LT1?
10-28-2005, 08:10 AM
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Yes, but not resleeved. its an iron block so there's no sleeves to remove in the first place. 427 is possible but its not going to be cheap. LIngenfelter has taken a small block chevy all the way up to 454 ci but again, it wasn't cheap to do.
Yes a stock PCM can handle that as long as you're not going above 7000 rpm.
Yes a stock PCM can handle that as long as you're not going above 7000 rpm.
10-28-2005, 08:34 AM
#3
409 is as big as most venture but anything is possible with enough cash. Blocks not originally sleeved can be it is just more work and usually only done as a repair if one bore is damaged beyond what an overbore can handle, not sure if sleeving all would affect block strength. If you REALLY want to accomlish this I might point you towards and aftermarket block and then modify it to accept the LT1 parts or graft the opti and an HEI together and mod the intake to run a standard distributor.
10-28-2005, 02:25 PM
#5
I wouldn't go past 396 at that even parts selection must be careful to keep the top ring landing strong. Maybe 5.85 rods to leave room to keep the top ring lower in the piston, cubes can help power but are not worth it if the compromise durability at least IMO.
Some of the Impala guys go 409 but that is for the oldschool cool factor as that was an engine option back in the 60s I believe even mentioned in so songs of the day, it was a legend in it's time.
Some of the Impala guys go 409 but that is for the oldschool cool factor as that was an engine option back in the 60s I believe even mentioned in so songs of the day, it was a legend in it's time.
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10-30-2005, 12:38 PM
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I have been thinking alot about this 427 because after this hurriane F'ed my place up my neighbor was over and we were talkin about the camaro and he said a 4.125 bore and 4 inch stroke is a 427 smallblock......so Im tryin to figure out if you can bore out one of these LT1's from 4.000 to 4.125" bore and throw in a 4 inch crank.....If not and the cylinders are to close I want to buy a 400 4 bolt main block that I already have lined up and throw in a 4 inch crank to make it a 427....
But after a while of research on the web about boring out LT1's they say you cant go that far so I might just pick up this small block 400 and make it a 427 with moderate compression so I can boost later on.
If not I will jsut do a 383 stroker in this block with all the goodies....heads, cams, the whole 9 yards and everythign in between.!
But after a while of research on the web about boring out LT1's they say you cant go that far so I might just pick up this small block 400 and make it a 427 with moderate compression so I can boost later on.
If not I will jsut do a 383 stroker in this block with all the goodies....heads, cams, the whole 9 yards and everythign in between.!
11-02-2005, 02:16 AM
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Just a quick not from an old school small block guy... if you do the 400... don't pick the 4 bolt. The 2 bolt is actually stronger because the extra bolt holes were drilled all the way through the webbing. If you want REALLY strong pick up a 2 bolt and have it drilled for a Splayed 4 bolt. Forget about the 4 bolt 400's. You'll regret it...
11-02-2005, 10:24 AM
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Originally Posted by 96capricemgr
I wouldn't go past 396 at that even parts selection must be careful to keep the top ring landing strong. Maybe 5.85 rods to leave room to keep the top ring lower in the piston, cubes can help power but are not worth it if the compromise durability at least IMO.
Some of the Impala guys go 409 but that is for the oldschool cool factor as that was an engine option back in the 60s I believe even mentioned in so songs of the day, it was a legend in it's time.
Some of the Impala guys go 409 but that is for the oldschool cool factor as that was an engine option back in the 60s I believe even mentioned in so songs of the day, it was a legend in it's time.
I'm in agreement with Dwayne. Now on the other hand it's possible to make a 427 Cubic Inch LT1 and even bigger. But let's say it's not cheap, the block is not even anywhere near stock, and it's aluminum
Matt
