Fastest Stock Internal LT1?
05-13-2006, 08:38 PM
#22
Originally Posted by 96capricemgr
Why do people insist on pulling apart good shortblocks? 95+% of shops will not be able to duplicate the quality of the stock hone in the cylinders or valvejob in the heads.
Duplicate of "Factory Hone" i beg to differ thats obsurd
05-13-2006, 08:54 PM
#25
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Originally Posted by urbanhunter44
No they won't duplicate the quality.. they'll EXCEED it!
Agreed. Most good machine shops have tighter standards then factory tolerances anyway.
05-13-2006, 09:58 PM
#26
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For stock internal it is pretty simple. It means that everything in the motor must be the same as it was delivered from GM. Bottom end, factory cam, factory heads(no porting, stock Valves and Valve job). No nitrous, no supercharger/Turbo. The only thing that you can really change on the motor that oil touches is the roller rockers and springs. Basically anything else is game. Shon Herron a member on here has the record with a low 11.80 in the 1/4 if you search his name you will find everything that he has done to his car and a good idea of what it takes to get where he is at. Right behind shon is Tekprodave with a mid to high 11.80 also a member on here who if you read his posts has some good information for us bolton guys.
For cam only it is basically the same as stock internal with the exception that you can have a different aftermarket cam intstalled.
For cam only it is basically the same as stock internal with the exception that you can have a different aftermarket cam intstalled.
05-13-2006, 10:05 PM
#27
They do not have the quality of equipment. a couple decades ago a local machine shop may have duplicated an OEM engines machining but not today unless you go to a fairly highend shop. I have seen more guy have trouble with low milage rebuilds than with 100K modded stock motors, look to the sponsor list here and you will do better than average but go to the local "speed shop" and tell them you want to run 10.4:1 on pump gas and they will tell you you can't and that 180-190 cranking psi is the limit, but we here know that 10.4 is stock on the f-body and cranking compression is higher than that well past 100K because the engines wear so little. Hell my iron head Roadmaster wagon with 180K on it cranked 195-200psi, but yeah the stock machining is crap and you need to let some local hack "fix" it.
05-13-2006, 11:23 PM
#28
Originally Posted by 96capricemgr
Why do people insist on pulling apart good shortblocks? 95+% of shops will not be able to duplicate the quality of the stock hone in the cylinders or valvejob in the heads.
Originally Posted by 96capricemgr
They do not have the quality of equipment. a couple decades ago a local machine shop may have duplicated an OEM engines machining but not today unless you go to a fairly highend shop. I have seen more guy have trouble with low milage rebuilds than with 100K modded stock motors, look to the sponsor list here and you will do better than average but go to the local "speed shop" and tell them you want to run 10.4:1 on pump gas and they will tell you you can't and that 180-190 cranking psi is the limit, but we here know that 10.4 is stock on the f-body and cranking compression is higher than that well past 100K because the engines wear so little. Hell my iron head Roadmaster wagon with 180K on it cranked 195-200psi, but yeah the stock machining is crap and you need to let some local hack "fix" it.
05-13-2006, 11:36 PM
#30
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There is a guy up in northern california that says he has the LT1 bolt on record and I think it's 11.8 with just bolt ons and some major weight reduction. Tekpro i think is his screen name.
05-14-2006, 12:20 AM
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Originally Posted by roughneck427
I think local shops are wayyyyyyy better in hone or valve jobs 
I wouldn't even think our stock heads would even benefit from a valve job( 3angle, etc), but then again that's just opinion I've seen tossed around a few times on another forum
05-14-2006, 03:24 PM
#33
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Originally Posted by 96capricemgr
They do not have the quality of equipment. a couple decades ago a local machine shop may have duplicated an OEM engines machining but not today unless you go to a fairly highend shop. I have seen more guy have trouble with low milage rebuilds than with 100K modded stock motors, look to the sponsor list here and you will do better than average but go to the local "speed shop" and tell them you want to run 10.4:1 on pump gas and they will tell you you can't and that 180-190 cranking psi is the limit, but we here know that 10.4 is stock on the f-body and cranking compression is higher than that well past 100K because the engines wear so little. Hell my iron head Roadmaster wagon with 180K on it cranked 195-200psi, but yeah the stock machining is crap and you need to let some local hack "fix" it.
