This engine was built for my '91 Firebird project. But I've sold everything, and have decided to sell this too. The motor was built for a supercharger/turbo or nitrous. I have machine shop reciepts dated from March. The motor is new. I put it in the car, fired it up with a singleplane, and drove around the lot once.
It idles at 50psi cold, 40psi hot. It's a great motor, but I'm 99% sure my next project will be an LT1 car, so I can't use this.

Short block was machined and built by Miller Machine, in Haverhill Massachusetts. I'd normally build it myself, but I didn't heat my shop this year and wanted to make sure the motor was built 100% within spec.

Here is the specs:

GM 1pc rear seal, roller, 4bolt main high nickel block, mfg 1994
Forged steel GM performance parts crankshaft, radiused, polished, etc
SCAT 5.850" H-Beam connecting rods, arp hardware
ARP Main cap studs
JE/SRP (139629) Forged, inverse/reverse dome, -16CC pistons
JE/SRP floating wrist pins with spiral-locks
JE/SRP 1/16" plasma-molly rings
Competition cams hydraulic roller lifters
Cloyes true double roller timing set
Competition cams custom hydraulic roller camshaft (230/244 @.050, .535/.540 lift, 112lca, 112ica installed at 113* ica)
Mellings M55HV Oil pump and pickup
Oil pan
SFI Fluid damper
Block bored and honed, decked with pistons .005" in hole.
Compression ratios: 9.1:1 with 64cc heads, 9.3:1 with 62cc heads, 9.76:1 with 58cc heads, 10.1:1 with 55cc heads.

Specs are with FELPRO 1010 head gasket. (4.166 bore, .039" compressed thickness).

What do I want? Short block: $2250

I have a set of trickflow 23 degree heads, with the .600 lift spring package as well. I paid $1200 for the heads. They are bolted to the shortblock with ARP head bolts, sealed with permatex thread sealer. For an additional $900,
I will include them with competition camps hardened pushrods, and Summit/trickflow 1.5 full roller rockers, and GM aluminum valve covers. Or just the heads themself can be included for $800.

If the motor is sold as a shortblock, I will sell the heads for $800, roller rockers + pushrods for $100.


-- Joe

 

bump

 

What CI is this motor? Can't find that piston part # anywhere? Gasket bore size 4.166? 28* heads?

 

23* heads, sorry typo..

felpro 1010 is the gasket I always use. 4.166" x .039"

SRP-139629 is the part #.. I made a few typos.. I was chatting with someoen while posting and obviously my mind was elsewhere.. Anyway, the piston is
4.040" bore. They didn't make a 6" rod version in that bore with 3.48" stroke, so I used the 139629 which uses a 5.850" rod with 3.48" stroke. (or you can use it to get 383 with a stroker crank and a 5.7" rod)..

-- Joe

 

They are 62cc out of the box. Light mirror polish on the chambers, I'm told makes them about 64cc but I didnt (and wont) CC them.

part#: TFS-30400003

Valve Springs, Option 3:
1.460" o.d. double with damper
125 lbs. @ 1.780" installed height
376 lbs. @ 1.180" open
420 lbs. per inch rate
.600" maximum valve lift

Brand: Trick Flow Specialties
Product Line: Trick Flow 23 Degree Aluminum Cylinder Heads for Small Chevy
Cylinder Head Style: Assembled
Cylinder Head Material: Aluminum
Cylinder Head Finish: Natural
Combustion Chamber Volume (cc): 62
CNC Machined Combustion Chamber: No
Intake Runner Volume (cc): 195cc
Exhaust Runner Volume (cc): 75cc
CNC Machined Intake Runner: No
CNC Machined Exhaust Runner: No
Intake Port Location: Standard
Exhaust Port Shape: D-port
Exhaust Port Location: Standard
Spark Plug Style: Angle
Intake Valves Included: Yes
Intake Valve Diameter (in): 2.020 in.
Exhaust Valves Included: Yes
Exhaust Valve Diameter (in): 1.600 in.
Valve Springs Included: Yes
Maximum Valve Lift (in): 0.600 in.
Outside Diameter of Outer Spring (in): 1.460 in.
Damper Spring Included: Yes
Number of Springs Per Valve: Dual
Retainers Included: Yes
Retainer Material: Chromemoly steel
Locks Included: Yes
Lock Style: 7 degree
Valve Stem Seals Included: Yes
Valve Stem Seal Style: Viton®
Rocker Arm Studs Included: Yes
Rocker Arm Nut Thread Size: 3/8-24 in.
Rocker Arms Included: No
Rocker Arm Nuts Included: No
Guideplates Included: Yes
Guideplate Pushrod Size: 5/16 in.
Valve Cover Mounting Style: Perimeter bolt
Accessory Bolt Holes Drilled: Yes
Intake Valve Angle: 23
Exhaust Valve Angle: 23
Valve Guides Included: Yes
Valve Guide Material: Manganese bronze
Valve Seats Machined: Yes
Valve Seat Machine Style: 3-angle
Valve Seat Material: Tungsten
Steam Holes Drilled: No
Oiling Style: Through pushrod
Machined for O-Ring: No
Heat Crossover: Yes
Quantity: Sold as a pair.
Notes: Will not fit centerbolt-style intake manifolds.

 

Interested in any kind of trading stock for the heads?