What is the horsepower rating on the ls1?

**RidinDirty** · 01-28-2007, 02:48 PM

how much horse power can the ls1 block handle?

**Sarge** · 01-28-2007, 03:52 PM

Stock? Maximum 400 RWHP for a short while.

**WARP211** · 02-24-2007, 12:12 PM

Originally Posted by Sarge

Stock? Maximum 400 RWHP for a short while.

i heard that they were capable of handling at least 450 to 470HP.. But i'm not 4sure....

**LS1Formula01** · 02-26-2007, 10:58 AM

the ls1 block is capable of handling somewhere around 500 to 600 on the motor give or take. but then again look at the 427ci package that GMMG did on the ZL1 Camaro

**SSpdDmon** · 02-26-2007, 11:03 AM

The block is actually pretty strong. It's the stock internals that'll hold you back. Personally, I wouldn't build an LS1 much past 550-600hp (at the crank) on the stock bottom end. If you can do that without running it past 6500rpms, you should be fine for a while.

**Team Ramrod Customs** · 03-01-2007, 07:17 AM

I read in a magazine (forget which one it's been awhile) but it quoted that the bottom end of the ls1 motor could handle 1800hp. *note that's the bottom end, not the top.

**danziger** · 03-01-2007, 02:30 PM

Originally Posted by Sarge

Stock? Maximum 400 RWHP for a short while.

Um, no. My old, stock-bottom set-up lived at 576rwhp/590rwtq for 3 years before spitting a head gasket... Harlan's turbo 'Hawk was well over 600rwhp with a stock bottom for years. Lotsa heads/cam packages purring away with 440+rwhp on the stock bottom...

**WARP211** · 03-01-2007, 02:34 PM

Originally Posted by danziger

Um, no. My old, stock-bottom set-up lived at 576rwhp/590rwtq for 3 years before spitting a head gasket... Harlan's turbo 'Hawk was well over 600rwhp with a stock bottom for years. Lotsa heads/cam packages purring away with 440+rwhp on the stock bottom...

No shit huh.. dam.. thats pretty good.. What kind of maintance did you do.?? just the usually.. oil,coolant,rotate,

**danziger** · 03-01-2007, 02:41 PM

I overkill the oil and plug changes, but that's about it. Even though it is currently going out of vogue, I use Mobil 1 oil.

**M6HUGGERSS** · 03-01-2007, 04:18 PM

the block it self should be good to around 1,000-1,500hp.
(i have not heard of anyone splitting the block yet?)

the crank.... ive seen some 1,000hp cars do fine for a while.

the rods and rod bolts.... 550-650rwhp for a while.....

pistons.... depends of NA or FI..... FI id say 550rwhp MAX.... and even then you are counting down..... and NA.... maybe 650rwhp.

it is not a GOOD idea to TRY and push the limits of your STOCK engine unless you have the $$$ to build a GOOD forged motor afterwards....

there are to many variables to give a good answer..... tune, driving habits, maintanince, have ALOT to do with how long CERTAIN
parts in you motor will last!

**danziger** · 03-03-2007, 05:11 AM

I'd say RPM and detonation are more limiters of the stock short-block than a HP value. The rod bolts and ringlands seem to be the weak links...

**WARP211** · 03-05-2007, 07:42 AM

Originally Posted by danziger

I overkill the oil and plug changes, but that's about it. Even though it is currently going out of vogue, I use Mobil 1 oil.

What was your rev limiter set to.. 7000rpm..??

**danziger** · 03-05-2007, 11:41 AM

Nah. 6600RPM was plenty of over-rev for the old heads/cam set-up and my current 383 tails off even earlier...

**tonyjnjz** · 03-05-2007, 11:53 AM

hum.....lingenfelter runs a twin turbo 427 package with a 1000hp on the stock BLOCK.....im sure NOTHING else is stock though but the block is

**WARP211** · 03-05-2007, 01:12 PM

Originally Posted by danziger

Nah. 6600RPM was plenty of over-rev for the old heads/cam set-up and my current 383 tails off even earlier...

now did you use this setup for a daliy driver or was it just a weekend warrior type of thing..??

**Wesman** · 03-05-2007, 01:13 PM

500WHP on a stock bottom end LS1 isn't a problem at all.

There are plenty of guys on here with well over 500WHP and no issues to speak of. The motor is designed to hold a lot of power, even being aluminum.