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Old 12-05-2013, 08:33 PM
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crate 350

just wondering about the opinions on the new crate 350 motors?

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Old 12-05-2013, 08:52 PM
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Some are rebuilt, some are new builds with all new parts, some are carb to pan and they come with warranties, what do you want to know specifically?
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Old 12-05-2013, 10:11 PM
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some of the well known builders offer a fantastic product.Some are junk
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Old 12-05-2013, 10:44 PM
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the ones im looking at are from jegs. they say they are all new. just wondering has anyone bought one? as im looking into buying one. thanks for all the help
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Old 12-05-2013, 11:46 PM
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Quote:
Originally Posted by tn chevy View Post
the ones im looking at are from jegs. they say they are all new. just wondering has anyone bought one? as im looking into buying one. thanks for all the help
I've never bought a crate motor, but if I were going to, it would be from someone with a well-known name like Jegs or Summit and would include a warranty that would be honored.
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Old 12-06-2013, 12:05 AM
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GM crate motor

I bought a 350 GM crate motor 260 horse power, a number of years ago and it was a great experience. I figured up the expense of rebuilding my old motor at $1300 and the crate motor was $1500 with all new parts. One thing about the warranty you need to know about is that the GM motor only comes with a warranty if you install it in a GM car. If you install this in a Ford street rod you get nothing. It may have changed but that was the case when I bought mine, so you might look into that.
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Old 12-06-2013, 12:33 AM
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Quote:
Originally Posted by HotRodMan View Post
I bought a 350 GM crate motor 260 horse power, a number of years ago and it was a great experience. I figured up the expense of rebuilding my old motor at $1300 and the crate motor was $1500 with all new parts. One thing about the warranty you need to know about is that the GM motor only comes with a warranty if you install it in a GM car. If you install this in a Ford street rod you get nothing. It may have changed but that was the case when I bought mine, so you might look into that.

IIRC, if you buy from GM they require it to be installed by a dealer to keep their warranty, check that out if you buy from a dealer.
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Old 12-06-2013, 03:19 AM
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IIRC, if you buy from GM they require it to be installed by a dealer to keep their warranty, check that out if you buy from a dealer.
nope,, .............

to the o/p do your self a favor and get one with a roller cam.. not a flat tappet..
to much of a gamble today, between the oil's the parts make up.. lift bores being close to spec. and many others..
go roller..
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Old 12-06-2013, 04:03 AM
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I'm using a GMPP crate 350 in my '75 truck, and its been running great since I installed it in 2002, but that's just one data point. I've tried using different cams, intake manifolds and carburetors on my engine but the basic engine is limited by the relatively poor flowing stock heads, and using a flat tappet cam has other limitations. If I was going to buy a crate engine today I would try to budget the extra money for a roller cam block and better flowing heads.

The reason I used the GM crate engine was that my original engine had blown and the truck was a daily driver that I wanted back on the road quickly. It would have taken much more time to find a good block and get it machined and built. Ordering a crate engine took about the same time as any other GM part, and then I spent a total of about 3 days doing the swap.

Bruce
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Old 12-06-2013, 05:35 AM
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I payed 1919.00 for my g.m. vortec 350 from jegs
the ramjet cam was 168
the ls9 springs 62 retainers 40
1.6 rockers (not really needed) 300.00
vortec intake 225.00
should be 320-330+ hp..
it's 255 stock..
it's all new and before I changed parts was 3 year 100k warranty
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Old 12-06-2013, 08:37 AM
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If you have nothing to start with ( heads, block,etc) a crate motor may be the way to go. If you have or can get a rebuildable core for a couple hundred bucks then rebuilding may be the way to go. Either way if your just looking for a stock rebuild its probably going to be the same price either way. I also agree with whoever suggested a roller cam, you'll have a more reliable smoother running engine.
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Old 12-06-2013, 09:06 AM
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GM parts group, for comparison
Crate Engines
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Old 12-06-2013, 09:45 AM
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If all you want is a stock motor; the old 260 horse targetmaster is still available and does its job. I know a lot of guys say they're a great base for a long term build up, but I disagree there. If you want a long term project build up, buy a shortblock from your local builder, where you can dial in the compression and make sure the finer details are controlled properly. Then go buy some new GM Vortec heads, and a vortec RPM-type dual plane. I'd rather have a hands on, face-to-face experience with my hot rod engine builder, not a service manager. I wouldn't buy a serious hot rod crate engine from GM, the 383 oil-consumption issue was a big turn off for me. I've seen it handled poorly locally here twice, and GM seems absolutely adamant that by driving it forever it will magically solve the problem. I did put a jasper reman in my ex's car and it was satisfactory, but not my first choice. Thats just my personal preference.
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Old 12-06-2013, 12:58 PM
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Engine

I have a GM crate in both my cars. The last I heard was the warranty is good no matter what you put it in. I'm very happy with them. All I wanted was trouble free crusing. If you want big horse power see a builder. I bought the base motor and put my own cam in. The 290 HP motor just has A cheap Chevy cam for 200.00 or more. Thats the only difference. Good luck wit your choice.
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Old 12-06-2013, 01:05 PM
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Quote:
Originally Posted by gearheadslife View Post
I payed 1919.00 for my g.m. vortec 350 from jegs
the ramjet cam was 168
the ls9 springs 62 retainers 40
1.6 rockers (not really needed) 300.00
vortec intake 225.00
should be 320-330+ hp..
it's 255 stock..
it's all new and before I changed parts was 3 year 100k warranty
That is a very nice combo. Did the springs fit on the Vortec head without issue?

CPP(Chev Performance Parts) offers their newest GEn 4 springs in combination with their new ratainers that hold the GEN3/4 Beehive springs along with the GEN 1 valve diameter.
They state that these springs wont fit in the valve pockets of the iron Vortec heads.

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

From page 140 of the 2014 CPP catalogue.
19300952 NEW
Beehive Valve Spring Conversion Kit
Convert the valvetrain on your aluminum Fast Burn heads to the
beehive-type system used on Chevrolet Performance’s latest Fast Burn
heads (P/N 19300955) – and used on the ZZ5 and ZZ383 crate engines,
and CT400 – to gain greater high-rpm capability and valvetrain stability.
The springs, retainers and other hardware are direct replacements for
the conventional springs and hardware, with no machining of the valve
spring seat required. The engine’s existing intake and exhaust valves
are retained, allowing installation without cylinder head removal if
compressed air or another method is used to hold the valves closed.
The engine’s existing rocker arms are also retained. The kit comes with
components to convert a pair of cylinder heads, including:
Part Number Quantity Description
126235033 16 Spring
19301708 16 Cap
19301707 16 Seat
19301709 32 Keeper
Note : The conversion kit is intended only for Fast Burn heads and is not
compatible with Vortec heads because of insufficient room for the spring seats

Service parts for the above kit
Service Kit Includes:
Part Number Quantity Description
12499224 16 Spring
19303149 8 Cap
19303150 8 Seat
19302868 16 Keeper


xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

I havent seen any issue with using the LS6/2/3/9 springs on teh Vortec heads. Just curious if you did?

The above kit is on the brand new Fastburn 210cc cylinder head. On the ZZ383 they added 25hp up from 425hp. The new iteration has the Bowtie at the ends of the heads instead of the older GMPP script.

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
From page 133 of the new CPP catalogue.
ALUMINUM FAST BURN HEADS
Chevrolet Performance’s Fast Burn 23-degree cylinder heads deliver maximum
performance for small-block engines. A new head casting – distinguished
by new Chevy bowtie logos at each end – and new valvetrain with
high-rpm, LS-style beehive-type valve springs stretches the performance
range of the heads to enable greater power – including a 25-hp increase in
our ZZ383 crate engine! Fast Burn technology delivers more horsepower by
increasing cylinder pressures, which maximizes the air/fuel mixture’s combustion.
The 62cc combustion chamber is designed for used with flat-top pistons.
The CNC-machined Fast Burn heads require no additional porting for optimal
performance, so all you need to do is bolt them onto your small block and go!
They can be used on any small-block engine with at least 4.000-inch bores
and the standard-flow coolant system. Not for use on Gen II 1992-96 LT1/LT4
engines with reverse-flow cooling system.
B. 19300955 NEW
Fast Burn Aluminum Cylinder Head Assembly
• CNC-machined aluminum performance cylinder head
• Completely assembled with 2.000"/1.550" valves
• 210cc intake port, roof raised .240"
• 78cc D-shaped exhaust ports, raised .200" – requires Fel-ProŽ
exhaust gasket P/N 1470 (may require minor trimming)
• 62cc combustion chamber, .400" deck (can be milled to .060")
• No heat riser
• Angled spark plugs (5/8” hex, 3/4" reach, tapered plugs)
• 1.48" valve spring seat diameter
• Use head gaskets with stainless steel fire rings
• Raised, machined rocker rails
• .530" maximum valve lift (without modifications)
• Screw-in studs (3/8" top, 7/16" bottom)
• New "time-serts" prevents oil migration through rocker studs
• Dual bolt patterns for perimeter-bolt and center-bolt valve covers
• Dual bolt patterns for Vortec and early-model intake manifolds
• Use bare head P/N 19300956
• Use production intake gasket P/N 19301685
This head is assembled with the following components:
12555331 Intake valves (4) 19301708 Valve spring retainers (8)
12551313 Exhaust valves (4) 19307709 Valve stem key (16)
12625033 Valve springs (8) 12552126 Valve rocker arm studs (8)
19301707 Valve spring seats (8) 10168519 Valve guides (8)
10212810 Valve stem seals (8) 12346004 Valve rocker arm stud sealer


xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Did you use the 787-16 retainers from Comp Cams?
The CPP version I would assume is the new 19303149 cap/retainer

Download here
Chevy Parts: Get Your Chevy Performance Parts Catalog | Chevrolet

peace
Hog
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