jrsmith80

Hello, new here but i ve been reading and watching for a few months now. I am building a 383 Stroker for an 81 Z28 drag car and just curious as to what you guys thought about this engine combination. I am new to the engine building scene so a good friend of mine thats built a few engine in his time put this combo together so I was looking for any input, good or bad, on what you guys think.

Engine Combo

Eagle Forged Crank 3.750
Eagle Forged H-Beam Rods
SRP Forged -7.00 cc Dome Pistons
RHS 200 cc Pro Action Aluminum Heads -
Camshaft, Mechanical Flat Tappet, Advertised Duration 306/306, Lift .555/.555
Rocker Arms, Ultra Gold, Stud Mount, Aluminum, 1.5 Ratio, 3/8 in. Stud
Intake Manifold, Victor Jr., Single Plane, Aluminum, Natural, Square Bore
Carburetor, Gasoline, 4150, 750 cfm, 4-Barrel, Down-Leg, Billet Metering Blocks, Dual Inlet

Let me know what you guys think about this combonation.

Thanks,
Jeremy

OneBadGMC

http://www.4secondsflat.com/Calculator_for_CID.html

I thought 383s were 3.8" stroke with a 4" bore???

You sure you're not building a 377???

Is this drag only, or street/strip? If it's drag only, assuming the head flow info from RHS is correct, I think the cam is to small and compression is too low (estimating 10.5:1 with 64cc head and .050 gasket).

http://www.racingheadservice.com/Inf...-SBC-200cc.gif

DirkaDirka

Jeremy,

Welcome to the forum. I am also new to the scene. The guys here are great and to me they are family already.

oldandtired

That combination sounds more like a hot, manual transmission street car engine.
JMO Dave

jrsmith80

I bought the rotating assembly from Summit. Its a World Products Kit that the dont sell anymore. The bore of the block is 4.030 with a 3.750 stroke.

The motor is gonna be just for drag racing. Its my first drag car and it will be an automatic car.

I will check out those website and see what I can come up with, my buddy thought it would be a good combnation and get the car in the 11.65 range. I dont know but keep the ole comment coming because as of right now I only have the short block assembled so I can change thing before its to late.

Jeremy

jrsmith80

I just visited the CID calculator and I came up with a 383 and 12.0497:1 Compression

OneBadGMC

Well, you're going to be limited by piston to valve clearance if the short block is together and the reciprocating assy is balanced.

How much piston to valve clearance do you have now with the cam that's in it?

My error on the compression, I used -7 instead of +7.

What rear gear is in the car? What trans? Bought a stall converter yet?

ashbros

I assume your using a 400 cid block.....
bore is 0.030 over

What cc are the head chambers, 64, 67, 72????

Rod length; is it 5.700 or 6.000
What is your block decked at 9.000 or ???

How much wrist pin is in the lower ring grove?

Curious

russ67chevelle

he states the crank size and bore size.well sounds like a 383...


id contact udharold or camking here on racing junk for a cam if not then use lunati voodoo line cam.if not lastly id use the comp extreme line cam.

goodluck

bigmack

your combo sounds just like my motor, mine is a 383 with srp 13 to 1 30 over 350 with 3.750 eagle crank and 6" eagle h-beam rods and 235cc pro action iron heads with the holley 750 hp carb powerglide and 4.71 gears and i'm running 10.70-80's. my cam is 630-630 solid roller and same intake.