ERE-383 #70


ERE 383 #70
Forged bottom 383 shortblock with
Forged Eagle crank, Callies Compstar 6" H-beam Rods,
Custom flat-top Ross pistons,
4-bolt Eagle splayed main caps
 and assembly of long block with TFS heads


Starting the build process with gathering parts and measuring for the crankshaft balance bob-weight.


I use the small digital scale under the plastic cup because it's quick and amazingly accurate.  I verify it's accuracy using my lab quality 3-beam scale.


Custom Ross piston which I had sent a Mahle piston to Ross for an example.  I wanted the ring pack to be like the Mahle but with a thicker crown so that I cold D-dish the piston if needed for more chamber volume.


The piston compression height is 1.135 as opposed to 1.125" in the traditional 383 piston.  That allows Ross to give a bit more crown thickness and I have my blocks decked to 9.010" anyway so the piston will be closer to zero deck. I'm probably going to make a 383 for my personal car and use this piston and run nitrous.

Piston 432g, pin 119.6, pin locks 4.5, rings 36, bearings 44, rod 171/448, oil 6
Bobweight = 1753g.


Now a look at the block and caps.  This block was obtained locally out of a 1995 Camaro.  I had it bored/honed/decked and fitted with Eagle splayed main caps and ARP studs.


I measured bore size using a BHJ 4.030" bore gauge as reference and it looks like the bores are .001" small.


I stuck a piston in the bore and measured with a feeler gauge and I get .003" clearance.  The spec is .004" and so that verifies that the bore is .001" undersized (it's 4.029).  Back to the machine shop it goes.


Continuing forward:  Here is the Eagle crankshaft.


Piston to rod assembly and other measurements.


Pistons have left and right valve reliefs.


2 spirolocks per side for a total of 4.


(Pay no attention to the 25 written on the rod). Standard sized Clevite CB-663-HN gives .0026 to .0027"
  I'm shooting for .0020 to .0022" and so after this photo I installed a .001" under 1/2 shell in the lower cap and that gave .0021"

Thanks to Bill Koustenis at Advanced Automotive Machine in Waldorf Maryland....He honed the block with a torque-plate and now it's at 4.031 which gives proper piston to cylinder wall clearance.  I measured and now have .005" P - W.  After getting the block back from Bill I clearanced for stroke at the bottom of the cylinders then washed and oiled it.  These photos show the beginning of the time consuming painting process.  I use a strong, thick product from POR15.


Ring filing and gap measuring.  1st ring gapped at 020" and 2nd ring at .024".  The bore is 4.031 and my ring checking fixture is 4.030.  This is a good chance to see the difference that .001" bore size makes for ring gap.  I get .017" in the fixture and .020" in the bore for the top ring and .020" in the fixture and .024" in the bore for the 2nd ring.  These are Mahle 1.5mm/1.5mm/3.0mm rings.  


Cam bearing installation.


Comp cams via Lloyd Elliott.


Ooops.  Comp sent it with the short dowel.


Moving onward.  Here is my verification that I plugged the rear main oil galley.


Main bearing clearance check.  King HP main bearings mix of standard/-.001/+.001(X).


And we have the Eagle forged crankshaft installed and with a thrust of .007".


Oil galleries threaded but the stock plugs go in with oil cooling holes for the timing set.


Mahle ring set on the Ross piston.


#1 piston in and it's at zero deck height.  Even though the block is decked to 9.010".  That is because the pistons were ordered with 1.135" compression height.


Rod bearings all from .021 to .023" clearance.


Rod bolts torqued to 75ft-lb and .004-.005" stretch.


Short cam pin finally removed.  Long one on the left.


Cam marking for our records.


LE Heads from Trick Flow


This customer supplied stock timing set has low run-time.


Degree check comes out to 110 deg. intake centerline.  Cam card says 112 is the spec, (cam is 2 deg retarded due to timing chain slack).


Since the timing set is not adjustable I tried a new timing chain...still slack and still at 110 ICL.  I'll say that that is close and it will be as good as it gets.  I removed the new stock chain and then re-installed the used chain to keep it a matched set.


Crower lifters soaking in oil.  Manley pushrods 7.2" hopefully will be the proper length.


3/8" studs rockers installed and the 7.2" pushrod.  Looks good.  I set the hydraulic preload at 3/4 turn past zero.


Melling 10552 oil pump, high pressure, standard volume.


Pickup bolted on with thread locking compound.


Oil pan from a take-off core.  Cleaned and painted with POR15.  Now to let it dry overnight.  I'll be back in the morning to test oil pressure and check for leaks.


Better late than never:  I forgot to insert photos of the heads.  These are Trick Flow GenX Street/Strip GM LT1, 195cc intake volume, 62cc chamber.


FelPro 1074 head gasket at .039".


ARP head bolts at 70ft-lb


Stock hub needs a key-way and so here is my technique.  I use a dremmel.


Time to check oil flow and pressure and gross leakage.
The drill presses it up to 60psig with 30W flush oil, (used in 2 or 3 engines prior to waste).


Now to install the very clean and good looking intake manifold.  I'll seal up all crankcase and intake holes as much as possible and blow air into the motor to look, listen and feel for gasket leaks.


Using my valve covers temporarily.


No air leaks except for at the valve covers.


Wrapping her up along with a courtesy set of spark plugs.

New Combo Below.  The Ross pistons were too loud due to the short skirt and 2618 alloy.


Here is the new rod piston and ring D.S.S. Racing pistons, SCAT forged I-beam 6" rods.


This is a D.S.S Racing SX series piston.  I saw them at a PRI show and was fascinated.  Good quality.  4032 alloy for a more streetable motor.  
SX Pistons Link


The piston ring package is 1.5mm, 1.5mm and 4.0mm oil ring.  I like the thicker and higher tension 4mm oil ring.


New bobweight = 1719.4g


Here is the replacement block fresh from Golen via R+L Carriers truck freight.


And after cleaning with soap/water/oil.  Notice the 4-bolt caps and ARP main studs.


I am checking the bores to see if they are close to 4.0300" which is referenced from my bore gauge standard in the next photo.


This is my big $$ bore gauge standard for 4.0300"


There are Total seal non-file fit rings and the top ring comes in at .018" which is a good gap for street strip all natural.  Notice the chamfer at the gap near the cylinder wall.  That is on all the top rings.  Very unusual.  But Total seal knows what they are doing.


The 2nd ring needed to be gapped by me to open it up to .018" and it did not come with a chamfer.  It is very square as are most ring sets.  The top ring must be designed to let some gas through to the 2nd ring where it then will not pass to the crank case.


All rings at .018" gap.


#5 cylinder bore is blemished.  The rings catch on this pit.  Cannot use the block without going to a .040" over bore.


Time to go clean up another block to use in place of this one.

 Ellwein Engines 2017