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how many miles will a 400 horse SBC 355 last

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Old Nov 29, 2000 | 10:24 AM
  #1  
Brandog87GTA's Avatar
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From: chatt,TN,US
how many miles will a 400 horse SBC 355 last

I am using the performer RPM package, just curious how long this motor is gonna last me if I dont **** it up. (Running NOS 100 shot also)Its my daily driver.

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Bright red 87 GTA with 350 tuneport. Basic mods such as K&N filter, Flowmasters, Wells MAF, TPIS air foil, Accel 8.8mm plug wires with , Accel distributor cap and rotary buttons.Gutted cat. B&M Shift kit, 100HP shot Nitrous, soon to change over to carburator.
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Old Nov 29, 2000 | 10:55 AM
  #2  
Kevin S's Avatar
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From: Pt. Pleasant, WV (Home of the Mothman!)
Just like any other engine.As long as you keep the maintanance up and don't abuse it.It also depends on how well the engine is assembled.It should last for quite a while.


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[This message has been edited by Kevin S (edited November 29, 2000).]
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Old Nov 29, 2000 | 12:17 PM
  #3  
jcb999's Avatar
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Joined: Aug 1999
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From: College Station, Tex USA
Car: 89rs
Engine: 400Sb
Transmission: Tremec 3550
It can easily live for 50K miles. If you take really good care of it probably closer to 80K. Will it be making HP after that long. Probably not (not without some freshing). The timing chain will give up close to 30K. You can get 10 degrees of cam retard with a worn out chain.

If you twist it a lot and high (6,500+), the rings and valve springs will not last very much longer than the chain.
One thing that helps a lot is giving the motor a good warmup time. I don't hammer it until its up to operating temp and I normally let the car sit idling for a least 1 min before moving.

I would personally use a better cam than the performer rpm. The comps are much newer designs.


[This message has been edited by jcb999 (edited November 29, 2000).]
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Old Nov 29, 2000 | 01:17 PM
  #4  
five7kid's Avatar
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
It will certainly last longer if you use a quality synthetic oil than it would on petroleum-based oil or cheap synthetic.

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R. 2.73 unlimited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LB9 w/ZZ3 cam, TBD heads, exhaust, paint, etc.).
57 Bel Air, my 1st car. 0.030 over 396, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" headers, TH400 w/TCI Sat Night Special conv & shift kit, 3.08 10-bolt, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere. Daily driver while Camaro was being put together.
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Old Nov 29, 2000 | 02:35 PM
  #5  
Grim Reaper's Avatar
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Joined: Jul 1999
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From: The Bone Yard
Car: Death Mobile
Engine: 666 c.i.
I agree with all of the above: 1) Proper maintenance, 2) Don't run it too hard, 3) Proper warm up procedure and 4) Use synthetic oil and you're engine can last a very long time if it was put together properly.

In my mind the 3 biggest killers to shortening an engine's life is: 1) Not changing your oil enough, 2) Not properly warming up your car and 3) Revving the snot out of it a lot. Synthetic oil does help prolong the engine, but it is NOT a "cure all" if you are constantly doing the 3 "no-no's" I mentioned.

[This message has been edited by Glenn91L98GTA (edited November 29, 2000).]
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