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ask me about my crabs
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81 Posts
Discussion Starter #1
i am breaking down and looking fora different cam, my engine is 92-95 not sure specifically, and when looking at cams i see balced shaft and non balanced, i read in my search that 92+ had balanced shaft's, is this all of them or just some, you never know with GM. And when they say computr control, do they mean the timing is computer controlled or just the fuel/air mixture.
 

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ask me about my crabs
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81 Posts
Discussion Starter #4
its just thats the amount of work i want to avoid, then again if i replace the cam i have to pull it off anyway to replace the lifters...cars suck, they should just fix themselves and have a sticker somewhere that gives you all the specs of all the components..hint hint chevy
 

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ask me about my crabs
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81 Posts
Discussion Starter #5
ha black must have posted as i was typing, so the TBI motors didn't have the balanced shaft just CPI?
 

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Project: Sabriel
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12,507 Posts
i think some TBI had balance shafts.
 

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ask me about my crabs
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81 Posts
Discussion Starter #7 (Edited)
I am going to end up pulling the intake off aren't i?

Nah i'll just pull the oil pan off, the enignes on the stand right now and probably will be cause i think the harness i got from painless has the wrong computer hookup
 

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102 Posts
Timing chain cover on a balance shaft engine looks different...
they are more oval shaped than egg shaped...looks alot different than a SBC cover

where as......

On the non balance shaft engines , the timing cover looks almost or just like SBC
 

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ask me about my crabs
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81 Posts
Discussion Starter #9
alright that makes things easier than pulling off the intake or oil pan
 

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Insane Network Engineer
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5,965 Posts
92 doesn't have the balance shaft. 93-current does...
1992
Blazer:
The high performance Vortec 4.3L V6 engine debuts
Four wheel ABS becomes standard equipment
Pickup:
Extended cabs were offered with leather seats
Common:
The front bucket seats were redesigned and a new speedometer and 4 spoke steering wheel are added
A premium sound system with CD player becomes an option
An electronic-shift transfer case becomes an option on 4WD models
Available engines:
105 HP - 135 Torque / 2.5L 4 CYL TBI
125 HP - 150 Torque / 2.8L V6 TBI
150 HP - 230 Torque / 4.3L V6 TBI
195 HP - 260 Torque / 4.3L V6 CPFI Vortec (Blazer only)


1993
Blazer:
2 door model available in LT trim package
All models receive two-tone paint scheme in LT trim
Manual lumbar adjusters on front seats become standard
Common:
The front grill is redesigned
The 4.3L V6 engine received an internal balance shaft to reduce vibration
Available engines:
105 HP - 135 Torque / 2.5L 4 CYL TBI
125 HP - 150 Torque / 2.8L V6 TBI
150 HP - 235 Torque / 4.3L V6 TBI
195 HP - 260 Torque / 4.3L V6 CPFI Vortec (Blazer only)
 

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ask me about my crabs
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81 Posts
Discussion Starter #13
ok, I am not sure it thats a good thing or a bad thing
 

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619 Posts
if it was a bad thing do you think gm would have put it in....
it balances the motor better thus increasing life span.

for those of you who talk about rotating mass and all that crap..... the balance shaft is light in comparison to everything else and the loss is minimal. The only reason i could see someone removing it is for a truck that doesn't see the road often and is primarily just a drag truck with heavy motor mods...motor is at its maximum build hp
 

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ask me about my crabs
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81 Posts
Discussion Starter #16
gm has done plnety of things that, in no way, can be construed as good, Rochester is just terrible, but i have my reasons for that. As for the balance crank, if I had to guess I would say that it robs some torque not horsepower, sure it is a little heavier, but with the smoother cyclic motion engine acceleration would be smoother, thus smaller loss of energy in it thus more hp, but torque would be robbed to allow for the heavier weight
 
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