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#1035327 - 02/21/16 09:32 PM 5.7L TBI Motor Question  
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GregR. Offline
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GregR.  Offline
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Montgomery, IL
I have 5.7L TBI out of a Silverado. Looking to install it in my Monte Carlo. I've heavy debating if this is the right motor I should use in my project. Ive heard these motors arent very good. Any suggestions or recommendations would be great. Looking to make it a street car and run it at the track.

#1035328 - 02/21/16 09:42 PM Re: 5.7L TBI Motor Question [Re: GregR.]  
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speeddemon Offline
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speeddemon  Offline
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NW Iowa
The TBI swirl port heads are not good for performance but the bottom end is ok. If you are doing a full rebuild I would use ARP rod bolts and have the rods align honed.


Jeff J
I believe.....guns don't kill people.....husbands that come home early do! Larry The Cable Guy
#1035329 - 02/21/16 09:57 PM Re: 5.7L TBI Motor Question [Re: GregR.]  
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2sabeSS Offline
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losangeles,cal
How about the96-98 vortec 350/305's?

#1035334 - 02/21/16 10:45 PM Re: 5.7L TBI Motor Question [Re: GregR.]  
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GregR. Offline
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Montgomery, IL
Ive heard that the 5.7 arent any good. Ive been debating about putting it together and selling it and getting something else. Ive also heard good things about the vortec's. My monte had the 4.3 already in it. Ive also debated on putting a 350 and putting a carb on it.

#1035341 - 02/22/16 03:04 AM Re: 5.7L TBI Motor Question [Re: GregR.]  
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86ttop Offline
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86ttop  Offline
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Brooksville, Fl
Hmm, I had a 5.7 TBI in my 90 Full Size Blazer that had over 130,000 miles on it when I sold it to buy a Pickup and my 96 Tahoe had the 5.7 Vortec in it with over 130.000 as well when I gave it to my son, so any bad you hear about those engines is BS!!


Leo Paugh
It's not an attitude, it's just the way I am.
POW*MIA
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If things improve with age, I must be approaching magnificent. thumbs
#1035342 - 02/22/16 03:06 AM Re: 5.7L TBI Motor Question [Re: GregR.]  
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Onebadbowtie86 Offline
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Traverse City Michigan
TBI 350 are great engines, I have owned a handful of them. They are just slow by todays standards.


'86 Monte carlo ss-Frame off resto-mod.
Ls2/t56/8.5"
#1035383 - 02/22/16 10:16 PM Re: 5.7L TBI Motor Question [Re: GregR.]  
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86ttop Offline
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86ttop  Offline
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Brooksville, Fl
It isn't always about speed, the extra torque is plenty!! If you want speed, get a car that is all about speed, JMHO.


Leo Paugh
It's not an attitude, it's just the way I am.
POW*MIA
You are not forgotten
If things improve with age, I must be approaching magnificent. thumbs
#1035385 - 02/22/16 10:22 PM Re: 5.7L TBI Motor Question [Re: GregR.]  
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Richie Cat Offline
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Lake Ronkonkoma, N.Y.
If it's going to be a fun "daily driver" why not do it ?


83 SC, 355 w/TPI
#1035419 - 02/23/16 07:01 PM Re: 5.7L TBI Motor Question [Re: 86ttop]  
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jmireles Offline
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jmireles  Offline
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El Paso, Tx
Originally Posted By: 86ttop
Hmm, I had a 5.7 TBI in my 90 Full Size Blazer that had over 130,000 miles on it when I sold it to buy a Pickup and my 96 Tahoe had the 5.7 Vortec in it with over 130.000 as well when I gave it to my son, so any bad you hear about those engines is BS!!


I agree, they're great engines that go on for a long, long time. My '97 K1500 Silverado has 170K miles and is still going strong. I've wanted to buy a low mileage '98 but I mostly find trucks well north of 200K. That should say something about durability.


-'87 Monte SS LS 2/4L65e Quick Perf. 9" w/disk brakes
-'89 Iroc Z28 Stock 5.7 Edelb. TES headers, Borla Exhaust90K
-'77 Trans Am 468(Stroked) Doug's Headers Flowmaster catback
B & M shift Kit 400 Turbo trans. Edel brock Performer
RPM Intake Sean Murphy built Rochester Carb. Restored
in '08. 3K
#1035420 - 02/23/16 07:38 PM Re: 5.7L TBI Motor Question [Re: GregR.]  
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Joe87monteSS Offline
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Memphis,TN
The bad thing about the TBI truck engines is like was said earlier, the heads. They are crack prone, and do not flow very well. They are cheap to build, and would be a great start. It won't have a roller cam, but that is also a cheap upgrade since the block will most likely be prepared for it.

I prefer the 638 TBI block rather than the 880 Vortec bock.


Joey
Engine/head builder/machinist
1987 Monte Carlo SS 383/4 Speed
2004 Silverado
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#1035437 - 02/24/16 02:43 AM Re: 5.7L TBI Motor Question [Re: GregR.]  
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GregR. Offline
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GregR.  Offline
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Montgomery, IL
The 5.7 I have is out of a 95 Silverado. I was planning on doing cam, lifters and intake to it right off the bat before putting it in. Any ideas of what else i can do for a few more HPs? I also saved the computer for it out of the silverado to make it an easy swap. I'd need to use that instead of the stock computer correct?

#1035459 - 02/24/16 06:14 PM Re: 5.7L TBI Motor Question [Re: GregR.]  
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ss4ever Offline
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ss4ever  Offline
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Shelbina, Missouri
If your Monte already had the 4.3 then was it the TBI version? If so you should be able to put the 5.7 in there and other than the throttle position sensor everything should plug right in and run.

Myself personally I wouldn't bother with beefing it up, the stock TBI engine will move the car just fine. I would just clean it up and paint it and drive the wheels off it.


1983 Monte Carlo SS Turnkey ZZ4/700R4, Dakota Digital Instrument Cluster, 77k mile car. Many more mods to come soon.
#1036271 - 03/13/16 01:55 AM Re: 5.7L TBI Motor Question [Re: GregR.]  
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GregR. Offline
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GregR.  Offline
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Montgomery, IL
im on the fence of doing things to it. if i do i know theres a few things i can do but not alot or so ive been told.


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