Greyson Noble

I've very interested in building a big block, it would be going in a late 70s - early 80s C10 Shortbed. I haven't quite found the truck yet, but i'm going to beef up almost everything on it to support this Big Block. I have a build i've putting together for a while, i'm not very experienced as this will be my first FULL engine rebuild. I'm very familiar with everything and will have readily available experienced help. I have access to all the tools and everything I will need to rebuild a 454. Including taking it to a machine shop, etc... Any advice and inputs would be welcome, as well as corrections to parts and any suggestions please. This will start with a 454 4-Bolt Main. Would lower compression be recommended if i'm running 90-95 Octane Pump Gas? I'm going to have a high quality ignition system.

454
.060 Over : Bore - 4.310” x 4.250” Stroke - 496ci
Deck Height - 9.8”
Deck Clearance - .020”
Compression - 10.5:1
RPM : 1,900 - 5,600


Edelbrock Performer RPM Intake Manifolds - http://bit.ly/2dMID4q


FiTech MeanStreet EFI 800 HP Self-Tuning Fuel Injection System - FITech Fuel Injection 30008K: MeanStreet EFI System 800HP Kit | JEGS


COMP Cams Xtreme Energy Retrofit Cam and Lifter Kit - http://bit.ly/2f7uUFJ
Cam Card : 11-423-8 - Xtreme Energy? Retro-Fit Hydraulic Roller Camshafts
Advertised Duration 276/282
Lift .510/.510
224 int./230 exh @ .050
110 Lobe Seperation


Edelbrock Performer RPM Cylinder Heads - http://bit.ly/2fyUzoK
Combustion Chamber - 110cc
Intake Runner - 290cc / Exhaust Runner - 110cc


Scat Engine Rotating Assemblies - http://bit.ly/2fQZkxp
1) Scat Forged Crankshaft
Forged 4340 Steel
Stroke - 4.250”
2) Scat H-Beam Connecting Rod - Connecting Rods Product Search - SCAT Crankshafts
Forged 4340 Steel
Rod Length - 6.385”
Rod Journal - 2.200”
Big End Bore - 2.325”
3) SRP BBC Small-Dome Profile Piston - BIG BLOCK CHEVY - OPEN CHAMBER - BBC SMALL DOME PROFILE - JE Pistons
Piston - Forged Aluminum
Comp Height - 1.27”
Dome : -18.00cc
Piston Style - Dome w/ 2 Valve Reliefs
Wrist Pin : Floating - .990”

terravast4

iTrader: (25)

have you considered the air-gap intake?

ZO6Ted

Been so many years but I thought 9.5 compression was the ticket on pump gas but hell that was probably iron heads. I would go with a bigger cam for sure. John Lingenfelter built a 496 that put down over 600 at the crank with maybe a 230 degree cam with his ported iron heads. Do a google search for the article. Sounds like a blast on a C10!

Greyson Noble

I just recently did some research on them, do you prefer them over the regular Edelbrock RPM Intakes? I found this, from what i've seen they have much better performance over the regular RPM's.

https://www.summitracing.com/parts/edl-7561

terravast4

iTrader: (25)

i have a 496 in my 70 nova. big blocks get hot in the engine compartment. the air gap with keep the carb nice and cool

terravast4

iTrader: (25)

if you have not purchased any parts yet summit has a 496 crate engine that is reasonably priced

felonygtp

Big blocks like air. I would look at brodix bb2 xtra for heads. They might seem big but you won't regret going big incase you decide to install a larger cam later. Remember a bad cam and good heads makes more power than a good cam and bad heads. You might want to drop the compression to 10:1 for pump gas. Large bores hold heat and can cause detonation. I've ran a 468 up to 11:1 but had to drop timing to 32 total instead of 38. I made less power than if I would've had lower compression to begin with. If your going to stay with 10.5:1 then run a cam with some more overlap So it doesn't build so much cylinder pressure down low.

3500Silverado

Set the deck clearance to 0.00", use a 0 .042" compressed thickness head gasket, big bore engines, especially open chamber big block Chevy engines, despise excess deck clearance. That head has a decent chamber. With an aluminum head and a tight deck clearance you can run over 10:1 compression, especially if you use enough camshaft.

A 112 or 114 degree lobe separation angle on the camshaft will make the EFI much happier and easier to tune. Use a -9 steel billet roller core, you'll need the Comp polymer distributor gear. Alternatively, Lunati has some EFI Voodoo hydraulic roller cams on steel cores with special distributor drive gears. Those heads could use up to 0.550" lift in out of the box form with the correct valve job. That basic camshaft is a bit small for that engine. Around 232/242 @ 0.050" intake/exhaust will serve a 496 much better, unless you want to tow at low RPM and with heavy loads.

ACAMS

I am on this site because my 4x4 needs an LS engine, but big blocks are my usual.

Listen to felon and 3500, big heads are the ticket and as far as Comp Cams go .... I break them in short pieces and use them for throw line weights .... listen to 3500 on that!

Big aluminum heads and a big cam (with the proper stall) can run 10.5:1 compression all day and if you don't go too big on cam and stall it will be a pleasant daily driver with plenty get up and go! ..... did we mention that big blocks don't mind a little Nitrous running through their system every once in a while!

Bluecollar Hotrods

iTrader: (18)

Get in touch with Chris Straub or Mike Jones for a camshaft. Both work wonders with big block Chevy's. Read up on the FiTech, over on the TC forums - I have seen some people struggling to get them to work right. Cylinder heads... AFR, Trick Flow, and Brodix all have good options.

JMHO