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

What are the weak points in the lt1 bottom end ?

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Old 07-28-2009, 04:27 PM
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lol





Originally Posted by 1badzee
Old 07-28-2009, 04:29 PM
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I just want to be different i always see v8 s10s and v8 rangers i want a v8 toyota like early 90s model i think that will be cool
Old 07-28-2009, 04:31 PM
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The weak point on the Lt1 is......the LT1! Plain and simple!
Old 07-28-2009, 04:35 PM
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OH come on they aint all that bad lol i have owned 2 and havent had any probleys out of them as long as you service them correctly and take care of them. I tortured my 93 and still never had any problems out of the motor but took out the tranny. it had 163xxx







Originally Posted by riceburnerZ28
The weak point on the Lt1 is......the LT1! Plain and simple!
Old 07-28-2009, 04:54 PM
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If my car come down because of stretched rod bolts, most definately not putting stock stuff back in it if I can build the bottom end up for cheap.
Old 07-28-2009, 04:59 PM
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I would agree



Originally Posted by BSmiff
If my car come down because of stretched rod bolts, most definately not putting stock stuff back in it if I can build the bottom end up for cheap.
Old 07-28-2009, 05:03 PM
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rod bolts arent your spun bearing problems...at least in all the lt1 i built with stock ones we spin to 7000 they havent been a problem...your weak point as a power adder is the pistons...they will go at 575ish id say, but thats fast enough for low 10's
Old 07-28-2009, 05:08 PM
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Originally Posted by daniel6718
rod bolts arent your spun bearing problems...at least in all the lt1 i built with stock ones we spin to 7000 they havent been a problem...your weak point as a power adder is the pistons...they will go at 575ish id say, but thats fast enough for low 10's
Telling people that there are no issues with spinning stock bottom ends w/ stock rod bolts to 7000 rpms is NOT a good idea. Yes, some can do it without issue...but most will run into problems, big, expensive problems if they do so.
Old 07-28-2009, 05:36 PM
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Im probaly going to throw some GO GO Juice on it and give her hell to 6k
Old 07-28-2009, 07:20 PM
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Originally Posted by 94Z28rag
I always thought that was a pretty well-known and agreed upon fact about the LT1s.
The first time I've heard anything about it was a month or 2 ago. I still have yet to see a real engine builder or anyone that has actually measured a rod bolt to confirm they have stretched. It seems like someone read about the 98-00 ls1 rod bolts and think it automatically applies to LT1's. People have run their stock shortblock cars to 7200+ for years at the drag strip without any issues, but people seem think they supposedly stretch rod bolts when they spin a bearing revving to 6200-6500.
Old 07-28-2009, 07:29 PM
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Originally Posted by Wicked94Z
pistons aint so hot either
Someone should've said that to Ford when it came to their 3.8L supercharged engines for the Super Coupes. The pistons are fine. People who own those cars are running north of 400rwhp on the stock bottom end. They just don't like detonation caused by user error.
Old 07-28-2009, 08:07 PM
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Sounds like a good explanation ^^^
Old 07-28-2009, 08:50 PM
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just get this set up, its not that expensive and you wont have problems

Ai Budget 355cid LT1 Rotating Assembly Package:

# Utilizes Stock 3.48" Stroke Crankshaft (Not Included!)
# Compstar Forged 4340 H-Beam Rods
# Mahle Forged Pistons (-5cc or -16cc)
# Mahle Plasma-Moly 1.5/1.5/3mm Ring Package
# Mahle Steel Pins & Wire Locks

$1195* - Your local machinist will need to add their preferred bearings & balance your crankshaft to the new reciprocating assy.
http://www.advancedinduction.com/AiP...sCompStar.html
Old 07-28-2009, 11:16 PM
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The stock cranks aren't bad, Jason Warrens car proved they can take some abuse. Most cars I have seen with bottom issues were spun bearing or a power adder mishap.
Old 07-28-2009, 11:31 PM
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so are you able to just replace the stock rod bolts, while replacing an oilpan gasket, and just leave the same crank bearings in there if not having any problems and be okay?
Old 07-29-2009, 01:52 AM
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Originally Posted by litch2004
so are you able to just replace the stock rod bolts, while replacing an oilpan gasket, and just leave the same crank bearings in there if not having any problems and be okay?
I would highly advise against it. No point in changing rod bolts unless you are upgrading to ARP rod bolts. The new rod bolts will have a different clamping force which might throw the rod out of round. I would only replace the rod bolts if you were having the rods reconditioned and installing all new bearings.
Old 07-29-2009, 07:26 AM
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Im gonna have AI build the motor in my car but were just playing with this truck so aint going to be a big deal
Old 07-29-2009, 08:03 AM
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****, there is no weak point in the LT1, it's all on the owner and how it's tuned. my car has 133,000 miles on the stock shortblock and i've never had one problem EVER. the car sees 150 shots all day and it has for pretty much its whole life. i drive my car like i stole it everyday with no issues. car is still as tight as it came from the factory. but small block chevy's run their hardest past 100k they love to be loose! i picked up 3mph after 100k lol
Old 07-29-2009, 09:45 AM
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Originally Posted by StangeatinZ28
but small block chevy's run their hardest past 100k they love to be loose! i picked up 3mph after 100k lol
I bought my car with 117k on it and at just about 160k she's running better than ever. I've picked up a few MPH with no mods in the past 10k miles.
Old 07-29-2009, 10:59 AM
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damn thats cool guys i know that SBC are really good motors and can last a long time if properly taken care of ^^^^^


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