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  #1  
Old 01-30-2004, 11:12 AM
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Big 3 power

whats the specs for the TBI (4.3, 5.0, 5.7) and vortech (4.3, 5.0, 5.7) chebys and dodges (3.9, 5.2, 5.9) of the same era and how they compare to the Pre-97 effies?..
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Old 02-01-2004, 11:01 AM
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Anyone know?!?!
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Old 02-01-2004, 12:50 PM
wnorman1192 wnorman1192 is offline
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I don't know the exact specs from those engines, but chevy was most always in the lead with HP up until the last couple of years. It seems that they may have to go back to the drawing board with their v8's. I think they have about maxed out thier v8's, while still keeping them reliable.
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Old 02-07-2004, 12:40 AM
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anyone?? thought id bring this to everyone attention again
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Old 02-07-2004, 02:40 AM
Ev2Demon Ev2Demon is offline
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Quote:
Originally posted by wnorman1192
I don't know the exact specs from those engines, but chevy was most always in the lead with HP up until the last couple of years. It seems that they may have to go back to the drawing board with their v8's. I think they have about maxed out thier v8's, while still keeping them reliable.
Rumor has it Chevy and GMC truck motors will have 3 valve heads before too long. The kicker is that they will still be single cam pushrod motors.
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Old 02-08-2004, 02:05 PM
AlfredB1979 AlfredB1979 is offline
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Re: Big 3 power

Quote:
Originally posted by optikal illushun
whats the specs for the TBI (4.3, 5.0, 5.7) and vortech (4.3, 5.0, 5.7) chebys and dodges (3.9, 5.2, 5.9) of the same era and how they compare to the Pre-97 effies?..

TBI's

4.3 = 165/225
5.0 = 175/275
5.7 = 200/310

SPFI/Vortec

4.3 = 200/260
5.0 = 220/280
5.7 = 255/330

Close estimates, probably off on the lousy TBI engines.

Dodge:

3.9 = 175/230
5.2 = 220/300
5.9 = 245/360


F-trucks

4.9 = 160/275
5.0 = 185/280
5.8 = 210/325

It's Sunday, but I'm not too far off.....
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Old 02-08-2004, 06:02 PM
MJD MJD is offline
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TBI engines are not lousy. They are much better than the Vortecs. They can pull trailers as well as Vortecs and they are more fuel efficient. They are also more simple and reliable.
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Old 02-09-2004, 01:59 AM
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simple, yes..relible...maybe. they are down on power and the 305 version wasnt so hot from what i seen...

alfredB, u are a life saver, thanx! im gLad someone finally answered my post
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Old 02-09-2004, 06:32 PM
MJD MJD is offline
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I was talking about 350's in particular. The Vortec might be rated higher, but has no noticable increase in power and a definite decrease in gas mileage. Believe me, I know. My dad owns a GM pickup with each engine. I don't know if you have been around Chevys much, but most people who are actually prefer the old TBI system.
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Last edited by MJD; 02-09-2004 at 06:37 PM.
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  #10  
Old 02-10-2004, 05:59 PM
jimandmandy jimandmandy is offline
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The TBI 4.3 was called Vortec due to the head design. Torque was 235, not 225, at least for the '94 that I owned. Oil consumption was a little high on that engine but I had no other problems. TBI had a clean, simple look under the hood.

The main reason I bought that Chevy was the Ford 4.9 I test drove was gutless by comparison. Both were 2wd automatic regular cab half tons.

Jim
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Old 02-10-2004, 05:59 PM
 
 
 
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