400 over heating?
Thread Starter
Joined: Dec 1999
Posts: 3,544
Likes: 19
From: WI,USA
Car: 89 FORMULA 350, 91 Z28 Convertible
Engine: ls1, LB9
Transmission: t56, Auto
Axle/Gears: S60/ 3.73
400 over heating?
do the 400 really have that big of a over heating problem? I know that the center cylinders touch but, gm mad them for some time.
Junior Member
Joined: Jul 1999
Posts: 29
Likes: 0
From: Langhorne, Pa. 19047
Not really. The people who have problems either do not increase cooling capacity as you should when you increase displacement and power, or get the block cleansed of the rust in the water jackets.
Junior Member
Joined: Nov 2000
Posts: 23
Likes: 0
From: mt vernon .ky. united states
I am probably the biggest 400 small block nut you will ever meet.I have ran them for around 10 years and as long as I can find them I still will.I have had a couple that like to run around 200 in traffic but they were .040 over, but other than those I cannot tell much diffrence over a 350 temp.
Thread Starter
Joined: Dec 1999
Posts: 3,544
Likes: 19
From: WI,USA
Car: 89 FORMULA 350, 91 Z28 Convertible
Engine: ls1, LB9
Transmission: t56, Auto
Axle/Gears: S60/ 3.73
I plan on getting one in the morning and was just wondering if I would have much for problems. I think it is a 79 2 bolt
Supreme Member
Joined: Dec 1999
Posts: 1,237
Likes: 1
From: Reno, NV
Car: yep
Engine: uhuh
Transmission: sure does
I just swapped my 350 for a +.020 400 and it runs cooler than my 350 with the same cooling sytem.
Sits on 180 all day with the air on. (In my truck)
------------------
ASE Mechanic/Machinist/Smog Tech
1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R
GO #3
Sits on 180 all day with the air on. (In my truck)
------------------
ASE Mechanic/Machinist/Smog Tech
1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R
GO #3
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