What are the weak points in the lt1 bottom end ?
Thread Starter
Joined: Jan 2009
Posts: 3,392
Likes: 220
From: North Carolina
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
Thread Starter
Joined: Jan 2009
Posts: 3,392
Likes: 220
From: North Carolina
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.
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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.
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.
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
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
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.
On The Tree
Joined: Sep 2008
Posts: 167
Likes: 0
****, 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
