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Need help to ID a motor

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axisg
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Need help to ID a motor

Postby axisg on Tue Apr 14, 2009 9:29 am

Serial on the Block is 4088548. I know it's missing a digit but that's all that's there on the block for a serial.

Engine is supposed to be a 5.7 out of a 93 4x4 truck.

I can see in the pics that there is a cover over the fuel pump
Trying to figure out HP specs and whether it's a roller block or not.

Looking for some help from the engine gurus out there on whether it's a good candidate to toss some heads on and run it as-is until I save enough coin for a decent motor + trans. Took the car out last weekend and I have the 305 blues.

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85 Cutlass Brougham
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Postby 85 Cutlass Brougham on Tue Apr 14, 2009 1:10 pm

If it is a 1993 engine, it SHOULD say the displacement in liters on the back by the bellhousing flange. If it is a 305, it will day "GM 5.0L", a 350 "GM 5.7L".
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1985 Cutlass Supreme Brougham (ex pizza delivery beater with 240,000 miles):
355 Chevy- 9.5:1 compression, Comp XE 262 cam, World S/R Torquer heads with 2.02's, Edelbrock Performer, 800CFM Q jet, Camaro ram air system,Edelbrock headers, Comp Magnum roller tip rockers,TH 200 4R, 3.23 rear, aluminum hood, IROC steering box, poly bushings, Eibach springs, etc. Cutlass build thread here: viewtopic.php?t=4982
Also: The Thing That Won't Die-1998 Nissan Frontier, 340,000 miles of pizza delivery.

88ss408
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Postby 88ss408 on Tue Apr 14, 2009 2:16 pm

if it's a 93 motor you have a 1 pice rear seal ,no provision for a fuel pump ,probley a roller motor (as they started in 88 ) , low compression low horse power.
but if it's in good shape and good running order (oil pressure and compression tested) you can trow a cam in there and a intake and 4bbl,headers and have a good power plant. just don't expect a race motor
good luck with your build !
88 monte carlo ss 408 sbc
84 monte carlo sc 400 sbc
88 cavalier Z24 3400 60*V6
88 cheyanne 4x4 310 sbc

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axisg
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Postby axisg on Tue Apr 14, 2009 5:15 pm

88ss408 wrote:if it's a 93 motor you have a 1 pice rear seal ,no provision for a fuel pump ,probley a roller motor (as they started in 88 ) , low compression low horse power.
but if it's in good shape and good running order (oil pressure and compression tested) you can trow a cam in there and a intake and 4bbl,headers and have a good power plant. just don't expect a race motor
good luck with your build !


Nah, just hoping for 275 - 300 hp with the hotcam, roller rockers, and vortec heads I have gathered over the winter.
The thing that throws me about this motor is the fuel pump blockoff plate which tells me it's a late 80's motor coupled with the fact that I have a clear picture of the incomplete serial number on the back of the block which leads me nowhere.

88ss408
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Postby 88ss408 on Tue Apr 14, 2009 5:55 pm

then it's a replacement block.i had a 93 block once and i got rid of it because of no fuel pump hole. i think they stoprd drilling them out in early 90's.
but yeah like i said if the oil pressure is good and there is good compression high 200's should not be a problem
88 monte carlo ss 408 sbc
84 monte carlo sc 400 sbc
88 cavalier Z24 3400 60*V6
88 cheyanne 4x4 310 sbc

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85 Cutlass Brougham
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Postby 85 Cutlass Brougham on Wed Apr 15, 2009 1:54 am

Well, with the LT4 cam ( if that is the one you have), Vortec heads and the right intake (Performer RPM) and headers, it should make far more than 275hp. I would estimate around 350hp at the crank provided it has at least 9:1 compression when you are done. Use steel shim head gaskets as they will bump the compression a bit.
Image
1985 Cutlass Supreme Brougham (ex pizza delivery beater with 240,000 miles):
355 Chevy- 9.5:1 compression, Comp XE 262 cam, World S/R Torquer heads with 2.02's, Edelbrock Performer, 800CFM Q jet, Camaro ram air system,Edelbrock headers, Comp Magnum roller tip rockers,TH 200 4R, 3.23 rear, aluminum hood, IROC steering box, poly bushings, Eibach springs, etc. Cutlass build thread here: viewtopic.php?t=4982
Also: The Thing That Won't Die-1998 Nissan Frontier, 340,000 miles of pizza delivery.

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Doober
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Postby Doober on Wed Apr 15, 2009 3:28 am

axisg wrote:
88ss408 wrote:if it's a 93 motor you have a 1 pice rear seal ,no provision for a fuel pump ,probley a roller motor (as they started in 88 ) , low compression low horse power.
but if it's in good shape and good running order (oil pressure and compression tested) you can trow a cam in there and a intake and 4bbl,headers and have a good power plant. just don't expect a race motor
good luck with your build !


Nah, just hoping for 275 - 300 hp with the hotcam, roller rockers, and vortec heads I have gathered over the winter.
The thing that throws me about this motor is the fuel pump blockoff plate which tells me it's a late 80's motor coupled with the fact that I have a clear picture of the incomplete serial number on the back of the block which leads me nowhere.


You'll be closer to 400hp with the Hot Cam and Vortec heads ;)

Just because the blockoff plate is there doesn't mean it doesn't have a hole drilled. Take the plate off & check it out. Also double check your bearing clearances & toss a new oil pump on while you're down there (use this pump).
-Darren-
'81 Malibu, Vortec'd 350, 4-speed Saginaw, 2.29s. Rusty.
'78 Malibu, de-framed, getting the drivetrain/suspension from the '81.
'92 Sierra, Vortec/TBI 383, 700R4, 3.08s
'87 Fiero GT, 2.8/5-speed
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axisg
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Postby axisg on Wed Apr 15, 2009 10:42 am

Unless the seller comes to his senses I am gonna pass on the motor. Because the motor is sitting on a shelf in a warehouse and not in a car I am unable to hear it run. I asked if I could pull off the oil pan to at least check if it was a 4 bolt and check the bottom of the cylinders for wear and he said in caps NO WAY ARE YOU RIPPING THE MOTOR APART ! Kinda puts a damper on things because I am not paying hundreds of dollars for a boat anchor !


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