LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Street LT1 rebuild

Thread Tools
 
Search this Thread
 
Old 08-04-2009, 08:03 PM
  #1  
Teching In
Thread Starter
 
TakeN0Prisoners's Avatar
 
Join Date: Apr 2009
Posts: 44
Likes: 0
Received 0 Likes on 0 Posts
Default Street LT1 rebuild

Hey guys!

My stock 350 LT1 Camaro 1995 with 87k miles threw rod bearings on the 1st and 8th cylinders and a main bearing also blew. I am considering building a 383. This car is purely a street car. Any suggestions on rotating assemblies?
Old 08-04-2009, 08:20 PM
  #2  
TECH Fanatic
iTrader: (6)
 
marc97taws6's Avatar
 
Join Date: Sep 2008
Location: DSM
Posts: 1,433
Likes: 0
Received 0 Likes on 0 Posts
Default

If it were me I'd just go with a nice Scat rebuild kit and bore it out to a 355. Thats just me though. I'm sure other guys will hop on and confirm what they'd do though
Old 08-05-2009, 08:34 AM
  #3  
Teching In
Thread Starter
 
TakeN0Prisoners's Avatar
 
Join Date: Apr 2009
Posts: 44
Likes: 0
Received 0 Likes on 0 Posts
Default

I would prefer not to have to bore it out. Would I need to do that with a 383?
Old 08-05-2009, 08:57 AM
  #4  
11 Second Club
iTrader: (88)
 
the_merv's Avatar
 
Join Date: Mar 2006
Location: The Beach...
Posts: 19,261
Received 63 Likes on 54 Posts

Default

Yup..383 is a 30-over on the Cylinders.

How bad is the Main Bearing..did it mess up the Block?

Me personally I would go with a stock Crank, Forged Rods & Pistons and get it Balanced, mill the Heads a little bit and go from there.
Old 08-05-2009, 09:07 AM
  #5  
Teching In
Thread Starter
 
TakeN0Prisoners's Avatar
 
Join Date: Apr 2009
Posts: 44
Likes: 0
Received 0 Likes on 0 Posts
Default

Block is fine, crank needs serious work.
Old 08-05-2009, 03:08 PM
  #6  
Teching In
Thread Starter
 
TakeN0Prisoners's Avatar
 
Join Date: Apr 2009
Posts: 44
Likes: 0
Received 0 Likes on 0 Posts
Default

Is it possible to put a 400 crank in and skip the overbore? Making a 377 .
Old 08-05-2009, 03:17 PM
  #7  
11 Second Club
iTrader: (88)
 
the_merv's Avatar
 
Join Date: Mar 2006
Location: The Beach...
Posts: 19,261
Received 63 Likes on 54 Posts

Default

Yea, it's very possible, people have done that before. Doing that you will need new Rods and Pistons aswell.
Old 08-05-2009, 03:18 PM
  #8  
TECH Senior Member
iTrader: (36)
 
ss.slp.ls1's Avatar
 
Join Date: Jan 2008
Location: Orange County, CA
Posts: 8,188
Received 26 Likes on 24 Posts

Default

You'll have clearance issues...

Why are you afraid to over bore. It would be best to bore and hone it .030" over to have fresh concentric cylinder walls to seat your new rings against. You'll want to have your block align honed and cut/polish the crank if it's salvageable. Otherwise pick up another good stock crank. Recondition your stock rods and install ARP rod bolts. Pick up some Mahle 4.030" hypereutectic pistons (or forged alumn if you have the $$$). That will make a nice 355 that is good enough to handle your purely street car.
Old 08-05-2009, 03:21 PM
  #9  
11 Second Club
iTrader: (88)
 
the_merv's Avatar
 
Join Date: Mar 2006
Location: The Beach...
Posts: 19,261
Received 63 Likes on 54 Posts

Default

If it's purely street then why are you wanting to build a big motor..?
Old 08-05-2009, 03:31 PM
  #10  
Teching In
Thread Starter
 
TakeN0Prisoners's Avatar
 
Join Date: Apr 2009
Posts: 44
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by ss.slp.ls1
You'll have clearance issues...

Why are you afraid to over bore. It would be best to bore and hone it .030" over to have fresh concentric cylinder walls to seat your new rings against. You'll want to have your block align honed and cut/polish the crank if it's salvageable. Otherwise pick up another good stock crank. Recondition your stock rods and install ARP rod bolts. Pick up some Mahle 4.030" hypereutectic pistons (or forged alumn if you have the $$$). That will make a nice 355 that is good enough to handle your purely street car.
I don't want to spend the money for the overbore.
Old 08-05-2009, 03:33 PM
  #11  
Teching In
Thread Starter
 
TakeN0Prisoners's Avatar
 
Join Date: Apr 2009
Posts: 44
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by the_merv
If it's purely street then why are you wanting to build a big motor..?
For fun.
Old 08-05-2009, 03:40 PM
  #12  
12 Second Club
iTrader: (15)
 
Z28Camaro30Ann's Avatar
 
Join Date: Mar 2007
Location: Cheyenne, Wy
Posts: 1,928
Likes: 0
Received 0 Likes on 0 Posts
Default

the entire 383 kit will cost a WHOLE LOT more than boring your cylinders! Overbore really is not THAT bad, especially if you take the block to them already disassembled because that makes less work for them.
Old 08-05-2009, 03:41 PM
  #13  
12 Second Club
iTrader: (15)
 
Z28Camaro30Ann's Avatar
 
Join Date: Mar 2007
Location: Cheyenne, Wy
Posts: 1,928
Likes: 0
Received 0 Likes on 0 Posts
Default

the entire 383 kit will cost a WHOLE LOT more than boring your cylinders! Overbore really is not THAT bad, especially if you take the block to them already disassembled because that makes less work for them.
Old 08-05-2009, 03:46 PM
  #14  
Teching In
Thread Starter
 
TakeN0Prisoners's Avatar
 
Join Date: Apr 2009
Posts: 44
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Z28Camaro30Ann
the entire 383 kit will cost a WHOLE LOT more than boring your cylinders! Overbore really is not THAT bad, especially if you take the block to them already disassembled because that makes less work for them.
How much for the kit?
Old 08-05-2009, 03:48 PM
  #15  
12 Second Club
iTrader: (15)
 
Z28Camaro30Ann's Avatar
 
Join Date: Mar 2007
Location: Cheyenne, Wy
Posts: 1,928
Likes: 0
Received 0 Likes on 0 Posts
Default

http://rover.ebay.com/rover/1/711-67...d=370185862572
Old 08-05-2009, 03:53 PM
  #16  
12 Second Club
iTrader: (15)
 
Z28Camaro30Ann's Avatar
 
Join Date: Mar 2007
Location: Cheyenne, Wy
Posts: 1,928
Likes: 0
Received 0 Likes on 0 Posts
Default

not to mention you STILL have to bore the block to get a 383 kit in. So that price is parts only, then you gotta go do the overbore anyways
Old 08-05-2009, 03:54 PM
  #17  
11 Second Club
iTrader: (88)
 
the_merv's Avatar
 
Join Date: Mar 2006
Location: The Beach...
Posts: 19,261
Received 63 Likes on 54 Posts

Default

I had a 350 that had no problems with destroying LS1's..I had very little in it.
Old 08-05-2009, 03:54 PM
  #18  
12 Second Club
iTrader: (15)
 
Z28Camaro30Ann's Avatar
 
Join Date: Mar 2007
Location: Cheyenne, Wy
Posts: 1,928
Likes: 0
Received 0 Likes on 0 Posts
Default

I agree with ss.slp.ls1. Just do a .030 overbore, and set your engine up to that. cheaper than a 383 and a 383 is a powerful setup for a "street" car
Old 08-05-2009, 03:58 PM
  #19  
12 Second Club
iTrader: (15)
 
Z28Camaro30Ann's Avatar
 
Join Date: Mar 2007
Location: Cheyenne, Wy
Posts: 1,928
Likes: 0
Received 0 Likes on 0 Posts
Default

mine before I tried my cam swap destroyed slightly modded LS1's.

I have a 355 with AFR 187cc Heads, Exhaust, Intake, 52mm TB, MSD Ignition, Headers, and some suspension mods. I raced a 2000 Z28 with CAI, and Exhaust. I beat him off the line and I was pulling on him the entire race, even on my top end in 3rd and 4th I was pulling away.

I have alot of mods, but that shows you what an LT1 with just an overbore and bolt ons can do... Once I finish my cam swap that will be another story
Old 08-05-2009, 04:01 PM
  #20  
TECH Addict
iTrader: (17)
 
djjab57's Avatar
 
Join Date: Jul 2007
Location: Texas
Posts: 2,498
Likes: 0
Received 0 Likes on 0 Posts
Default

I just had my block Boiled, Bored and line honed for $200, its not that much to have it done


Quick Reply: Street LT1 rebuild



All times are GMT -5. The time now is 12:18 AM.