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| Re: Are all Chevy Performance crate motors the same? [message #266447 is a reply to message #266439] |
Fri, 21 November 2014 10:49   |
Neal Krisher
Messages: 54
Registered: November 2013
Location: Apple Valley, MN
Karma: 0
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Is there a specific question here?
A quick google search turns up many options. It's a 4.3, they were never the epitome of performance, but a pretty solid engine.
I'd look for rebuild details and warranty specifications, then hold my nose and order.
Good Luck.
"Life has no instruction manual. Parts and labor can be impossible to find. Many go down the road with parts that are in need of service. A breakdown is eventual."
1975 26', TZE165V100301 Project/Driver
1977 26' TZE167V100439 Parts unit
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| Re: Are all Chevy Performance crate motors the same? [message #266461 is a reply to message #266439] |
Fri, 21 November 2014 14:05 |
petemosss
Messages: 221
Registered: August 2008
Location: Jacksonville, Florida
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The truck is a 1994 1/2T 6 lug C2500 orig. 350. 2 previous Fleet owners. Last one changed 4.3 and tranny twice so I have original nothing. I'm at ground zero. Has high rear end + the 4.3 had me 20 mpg towing a small camper. Might be towing bigger in future. Anyway I'm starting from scratch.
My question specifically "Is a Chevrolet Perf. Motor a factory piece or is it coming out of a franchise shop based on location. Jegs? Summit?
Pete
74 Canyon Lands 26' "Emery"
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| Re: Are all Chevy Performance crate motors the same? [message #266462 is a reply to message #266439] |
Fri, 21 November 2014 14:47 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
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Yeah, replace it with a 350
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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| Re: Are all Chevy Performance crate motors the same? [message #266463 is a reply to message #266461] |
Fri, 21 November 2014 15:19 |
Neal Krisher
Messages: 54
Registered: November 2013
Location: Apple Valley, MN
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petemosss wrote on Fri, 21 November 2014 14:05
My question specifically "Is a Chevrolet Perf. Motor a factory piece or is it coming out of a franchise shop based on location. Jegs? Summit?
If you buy a GM Performance Parts engine, it is built by GM even though Jegs, Summit, etc might sell it.
The Blueprint and Edelbrock engines Jegs offer are built by someone else.
I'd get one rebuilt by a reputable local to you shop. Easier to deal directly in the event something goes wrong.
"Life has no instruction manual. Parts and labor can be impossible to find. Many go down the road with parts that are in need of service. A breakdown is eventual."
1975 26', TZE165V100301 Project/Driver
1977 26' TZE167V100439 Parts unit
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| Re: [GMCnet] Are all Chevy Performance crate motors the same? [message #266467 is a reply to message #266463] |
Fri, 21 November 2014 15:52 |
Bruce Hart
Messages: 1501
Registered: October 2011
Location: La Grange, Wyoming
Karma: 5
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I can't find my reference but I had recently read that Mexico was building
a lot of the GM crate motors now. Anyone know different?
On Fri, Nov 21, 2014 at 2:19 PM, Neal Krisher wrote:
> petemosss wrote on Fri, 21 November 2014 14:05
>> My question specifically "Is a Chevrolet Perf. Motor a factory piece or
> is it coming out of a franchise shop based on location. Jegs? Summit?
>
>
>
> If you buy a GM Performance Parts engine, it is built by GM even though
> Jegs, Summit, etc might sell it.
>
> The Blueprint and Edelbrock engines Jegs offer are built by someone else.
>
> I'd get one rebuilt by a reputable local to you shop. Easier to deal
> directly in the event something goes wrong.
> --
> "Life has no instruction manual. Parts and labor can be impossible to
> find. Many go down the road with parts that are in need of service. A
> breakdown
> is eventual."
>
> 1975 Eleganza 26', 455,
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Bruce Hart
1976 Palm Beach
Milliken, Co
GMC=Got More Class
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Bruce Hart
1976 Palm Beach
1977 28' Kingsley
La Grange, Wyoming
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| Re: Are all Chevy Performance crate motors the same? [message #266468 is a reply to message #266461] |
Fri, 21 November 2014 16:09 |
Otterwan
Messages: 946
Registered: July 2013
Location: Lynnwood (north of Seattl...
Karma: 0
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petemosss wrote on Fri, 21 November 2014 12:05The truck is a 1994 1/2T 6 lug C2500 orig. 350. 2 previous Fleet owners. Last one changed 4.3 and tranny twice so I have original nothing. I'm at ground zero. Has high rear end + the 4.3 had me 20 mpg towing a small camper. Might be towing bigger in future. Anyway I'm starting from scratch.
My question specifically "Is a Chevrolet Perf. Motor a factory piece or is it coming out of a franchise shop based on location. Jegs? Summit?
Just FYI I have a 1992 Chevrolet 3500 Crew Cab with a 5 speed and the original 7.4L (454). 130K, runs great, I've only replaced the clutch and spark plugs (once each) and a couple batteries. Everything else in the engine compartment is stock.
I don't know if mileage is important to you (I get around 14 mpg) but the 7.4 will probably outlast the rest of the truck.
1977 Birchaven, Lynnwood WA - "We may not be able to stop all evil in the world, but I know that how we treat one another is entirely up to us."
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| Re: Are all Chevy Performance crate motors the same? [message #266469 is a reply to message #266439] |
Fri, 21 November 2014 16:40 |
geogmc
Messages: 4
Registered: September 2014
Karma: 0
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the 4.3 v6 is the one that is basically a SB350 without two extra cylinders, rods, crank and cam journals. other than that the geometry is all the same.
to "spin" a one piece cam bearing is highly unusual, two in a row?
Ive an old GMC safari with just over 400,000mi on the original 4.3 except I put a timing chain in it when it needed a water pump since it was over 200,000mi at that time and I was right there anyway.
a SB V8 conversion is very popular though and the route I will take if the 4.3 ever fails. in the vans, all that is needed is different motor mounts and fan relocation or electric fan.
the guys that have done the V8 conversion on these consistently report better gas mileage with the V8 also.
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| Re: Are all Chevy Performance crate motors the same? [message #266472 is a reply to message #266469] |
Fri, 21 November 2014 17:16 |
lotsofspareparts
Messages: 726
Registered: May 2014
Location: Arlington, WA
Karma: -9
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geogmc wrote on Fri, 21 November 2014 14:40the 4.3 v6 is the one that is basically a SB350 without two extra cylinders, rods, crank and cam journals. other than that the geometry is all the same.
The 4.3 is a short 350. They are also odd fire engines. A 350 swap in the 2500 with a 4.3 would be very easy to accomplish, since they are throttle body injected the only thing to replace is the ECU with the correct one for the 350, and the spark control box thing, it's black and mounted on the firewall near the distributor. It interprets the signals received from the knock sensor and adjusts timing accordingly. It depends on which 4.3 it is though, the Z code or W code. Z code is the TB engine, W code is the Vortec engine.
How do I know all of this you ask..... Because I am the proud owner of a 1991 Chevrolet S-10 4X4 5 speed that was originally equipped with a 4.3. It is now powered by a Tuned Port Injection 350 out of an 89 Iroc Camaro. My swap was a little more extensive than just swapping computers. Since I was switching from TB to Multi Port there was some additional wiring there and the wiring for the MAF Sensor and associated relays, and the electric fans and the relays for those.
Visually it appears stock when the hood is down, that is until I fire it up, certainly doesn't sound stock thanks to Magnaflow and 3in exhaust.
Jared
Jared & Tina Lazaron + 14yr old Daughter.....
77 Eleganza II "Recherché".....
73 Canyon Lands 230 "Elephant"
[Updated on: Fri, 21 November 2014 17:43] Report message to a moderator |
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| Re: Are all Chevy Performance crate motors the same? [message #266484 is a reply to message #266439] |
Fri, 21 November 2014 19:13 |
Steve
Messages: 506
Registered: September 2013
Location: East Greenville, Pa
Karma: 1
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Bruce,
To your question about GM performance motors made in Mexico, I can confirm that. I put a GM Performance crate motor in my 1969 Chevy truck about 8 years ago. Upon delivery I was surprised to see that the block had castings in it indicating made in Mexico. I have abused it pretty hard pulling big trailers and hauling a heavy camper. After break in oil and first regular oil change I have run full synthetic. No problems in about 50 thousand miles.
I have had two 4.3's in a blazer and now in a Jimmy. Blazer had 250 thousand when junked it.
1978 GMC Royal
Eastern Pennslyvania
1968 Chevrolet C20 396 Camper Special
1969 Chevrolet C20 Camper Special
1985 Buick Electra Park Avenue
1992 Camaro 25th Anniversary Heretage Edition Black
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| Re: Are all Chevy Performance crate motors the same? [message #266488 is a reply to message #266484] |
Fri, 21 November 2014 19:44 |
lotsofspareparts
Messages: 726
Registered: May 2014
Location: Arlington, WA
Karma: -9
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Steve Adams wrote on Fri, 21 November 2014 17:13Bruce,
To your question about GM performance motors made in Mexico, I can confirm that. I put a GM Performance crate motor in my 1969 Chevy truck about 8 years ago. Upon delivery I was surprised to see that the block had castings in it indicating made in Mexico. I have abused it pretty hard pulling big trailers and hauling a heavy camper. After break in oil and first regular oil change I have run full synthetic. No problems in about 50 thousand miles.
I have had two 4.3's in a blazer and now in a Jimmy. Blazer had 250 thousand when junked it.
"Hecho en Mexico", that is what the engine in my S-10 says as well, the engine I pulled out of the Iroc had been replaced with a GM Performance engine. I confirmed that by scoping the cylinders after I got it home. .030 stamped into the top of the pistons shows that it was in fact a rebuild. I have certainly put a lot of hard miles on it though, it's a smoke making tire shredder.
Jared
Jared & Tina Lazaron + 14yr old Daughter.....
77 Eleganza II "Recherché".....
73 Canyon Lands 230 "Elephant"
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| Re: Are all Chevy Performance crate motors the same? [message #266499 is a reply to message #266439] |
Sat, 22 November 2014 04:42 |
Steve
Messages: 506
Registered: September 2013
Location: East Greenville, Pa
Karma: 1
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Jarad,
Really nice job on the S-10. With the 5 speed, can it be towed with four wheels down?
All of this makes me want to do an engine swap and finally get a big block in my 69 truck. I did the smal block crate motor 8 years ago and regret not writing the bigger check for a high output 454. I decided to wait and have one built locally by a friend/neighbor who builds engines for a living. He has 15 to 20 in various stages of completion at any given time. A few clients are circle track racing teams that require frequent motor builds. He is a great guy with a lot of knowledge. My fear is that we will lose him and his knowledge will be lost. Generally this knowledge is not being passed on to the next generation.
My other truck, a 68' has the big block and is great for towing, hauling and of course the occasional tire shredding. With the posi rear end it leaves nice matching stripes on the road.
1978 GMC Royal
Eastern Pennslyvania
1968 Chevrolet C20 396 Camper Special
1969 Chevrolet C20 Camper Special
1985 Buick Electra Park Avenue
1992 Camaro 25th Anniversary Heretage Edition Black
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| Re: Are all Chevy Performance crate motors the same? [message #266576 is a reply to message #266439] |
Sun, 23 November 2014 15:53 |
petemosss
Messages: 221
Registered: August 2008
Location: Jacksonville, Florida
Karma: 0
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As long as I match ECM to engine does it really matter if I move ahead or back a year. Fairly certain block that blew was a 93 with a 93 ECM in a 94 truck. At Mr. Boyds site a 93 is $1700, a 94 $2300 and a 95 $1700. ???
350's new are a couple hundred cheaper but by the time I buy intake, injection, exhaust mflds. etc. I'll spend as much as the crate 350.
Thanks for all the input and opinions. I have more cofidence in this braintrust than all the bow tie forums together!
Pete
74 Canyon Lands 26' "Emery"
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