383 LT-1.. Too Hot?
Thread Starter
Burning Brakes
Joined: Dec 2000
Posts: 862
Likes: 0
From: Miami Florida
383 LT-1.. Too Hot?
Guys, my friedn just finished building a 383 lt-1. It has 11:1 CR, 306 cam, ported heads, exhaust etc..
After a few runs the water temp gets to 225 and the oil temp to 248!!
This is with ac off and both fans running al the time.. 160 deg. thermop as well.. system purged etc...
Is this normal operating temp. for a stroker.. specially the 248 oil temp?
Thanks!
After a few runs the water temp gets to 225 and the oil temp to 248!!
This is with ac off and both fans running al the time.. 160 deg. thermop as well.. system purged etc...
Is this normal operating temp. for a stroker.. specially the 248 oil temp?
Thanks!
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Re: 383 LT-1.. Too Hot? (xsmph)
No. A stroker might run a little wamer, but that's not right. Yout might see warmer than average temps as the engine is new, but that still seems high. Your coolant temp should normalize right above the thermostat temperature as long as there is airflow through the radiator.
My 160 thermostat cruises at 174.
If everything else is working properly he most likely doesn't have the proper LT1 thermostat. Those oil temps will cook a non synthetic oil in a heartbeat. If you haven't changed it you might want to.
My 160 thermostat cruises at 174.
If everything else is working properly he most likely doesn't have the proper LT1 thermostat. Those oil temps will cook a non synthetic oil in a heartbeat. If you haven't changed it you might want to.
Drifting
Joined: Feb 2000
Posts: 1,994
Likes: 0
From: Charleston, WV
Re: 383 LT-1.. Too Hot? (xsmph)
Do you mean .......runs down the drag strip? .........or runs around the block?.......... if it's runs (passes) down the drag strip ..........I'd think it's ok BUT I'd let it idle with the hood open and the fans running watching the guages before shutting it down. USE SYNTHETIC OIL ......... very important with high oil temps. Now if you're talking about runs around the block or normal type driving.........then yes that's too hot ....... break it in carefully..... :seeya
Thread Starter
Burning Brakes
Joined: Dec 2000
Posts: 862
Likes: 0
From: Miami Florida
Re: 383 LT-1.. Too Hot? (vettmech)
we are talking a 5 min run around the block. I drove it, and got on it a couple of times, then just cruised it home. When I parked it in the Drive way. I noticed the temps on the dig. readouts.. I thought they were really high, specially when compared to my Zo6, or Zr-1.. Only lt-1 strokers I've seen running that high oil temp have cement on the block, and the coolant temp. is usually very low.. in the 170's.. The builder used Total seal rings...
He also said the car used 1qt. of oil within the first 100 miles..
[Modified by xsmph, 12:56 PM 9/30/2002]
He also said the car used 1qt. of oil within the first 100 miles..
[Modified by xsmph, 12:56 PM 9/30/2002]
Safety Car
Joined: Jun 1999
Posts: 3,570
Likes: 3
From: Austin, Singapore, Kuala Lumpur, Houston, Dallas, Hong Kong, Elgin, etc.. Texas
Re: 383 LT-1.. Too Hot? (xsmph)
You probably have already checked to make sure the cooling system is full, no radiator blockage, and thermostat is good. You may want to bleed the air out the system one more time.
You may want to try putting the original thermostat back in to see if that has any impact. Sometimes that can be the problem.
You may want to try putting the original thermostat back in to see if that has any impact. Sometimes that can be the problem.
Melting Slicks
Joined: Apr 2002
Posts: 3,019
Likes: 0
From: down that one road next to that big tree
Re: 383 LT-1.. Too Hot? (CORKVETTE1)
timing should be around 6deg BTDC on that engine, also if you drive in hot weather or run it hard {like road racing} your going to have to upgrade to a large radiator, lingenfelter sells some, ron davis is another, just a big fat aluminum radiator will do the trick. ZR1's stock have the same problem, they just run hotter than hell. radiator upgrades will solve your problem.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Team Owner
Joined: Nov 1999
Posts: 32,782
Likes: 11
From: Former NCM Drag Racing coordinator, National director Corvette Challenge Spring Hill, Tennessee: Whiting, New Jersey
Cruise-In VI Veteran
Cruise-In VII Veteran
Re: 383 LT-1.. Too Hot? (xsmph)
Thats way to hot.
something is wrong.
something is wrong.
Melting Slicks
Joined: Apr 2002
Posts: 3,019
Likes: 0
From: down that one road next to that big tree
Re: 383 LT-1.. Too Hot? (mackeyred96)
check ignition timing
--------------------------------------------------------------------------------
Sure, just let us know when you make the timing adjustment kit for the optispark.
:lol: :lol: that's true, there's no distributor to twist, just out of curiousity how is LT1 timing set? is it all in the prom or flash memory?
--------------------------------------------------------------------------------
Sure, just let us know when you make the timing adjustment kit for the optispark.
:lol: :lol: that's true, there's no distributor to twist, just out of curiousity how is LT1 timing set? is it all in the prom or flash memory?
Advanced
Joined: Feb 2001
Posts: 89
Likes: 0
From: GatyCity VA
Re: 383 LT-1.. Too Hot? (xsmph)
Guys, my friedn just finished building a 383 lt-1. It has 11:1 CR, 306 cam, ported heads, exhaust etc..
After a few runs the water temp gets to 225 and the oil temp to 248!!
This is with ac off and both fans running al the time.. 160 deg. thermop as well.. system purged etc...
Is this normal operating temp. for a stroker.. specially the 248 oil temp?
Thanks!
After a few runs the water temp gets to 225 and the oil temp to 248!!
This is with ac off and both fans running al the time.. 160 deg. thermop as well.. system purged etc...
Is this normal operating temp. for a stroker.. specially the 248 oil temp?
Thanks!
Bet ya left the water pump drive shaft out :confused:
Le Mans Master
Joined: Apr 2001
Posts: 7,411
Likes: 253
From: Little Elm TX
Re: 383 LT-1.. Too Hot? (Ray Vargo)
Mine ran like that when the radiator looked like this.
Cleaned it up, and flushed it out. Added a bottle of water wetter, 50/50 distilled water and antifreeze, and now it runs around 200°.
Cleaned it up, and flushed it out. Added a bottle of water wetter, 50/50 distilled water and antifreeze, and now it runs around 200°.
Racer
Joined: Aug 2002
Posts: 432
Likes: 0
From: Lancaster CA
Re: 383 LT-1.. Too Hot? (R94 LT 1)
doesn someoe on the forum ave a really "cool" ;) looking aluminum radiator in their signature? i seem to remember seeing something like that. also, the ignition timing is swet by having the comp reprogrammed. he did get itreprogramed, right? with an engine like that the stock settings would never wok. it could be running lean, causing ti to heat up. just an idea. :seeya:chevy:seeya
