BUDGET 350 Chevy DIY How to install Pistons and Rings in your SBC

Part 4, making progress. More information to help you build your own engine project at home.

[@davenkaren2572]

THE BEST EVER SERIES ON BUILDING A SHORT BLOCK!!!!! THANK YOU!!!

[@goldsgarage8236]

Very nice compliment Dave. That is what we are working for! Psychic income!

[@HeadFlowInc]

I’m running this build on my Desk Top Dyno 5 to compare. Closing the intake valve ABDC 34° is creating pretty high cylinder pressure boosting Torque. SCR 9.52-1 ICL 104° 355hp @5000 rpm 456tq @2500 rpm Average 284hp 391tq ICL 108° 360hp @5000 rpm 448tq @2500 rpm Average 287hp 392tq Simulation environment: 80 F, 50% humidity and 1000’ altitude Average: 2000-6000 rpm

[@goldsgarage8236]

Thanks for doing this for us Headflow. The IVCP @ .006" is 56 degrees ABDC. Our revised compression number is 10.1:1. Can you run it again and see what you get with these numbers please? Thanks always for your input and support for my channel. AG

[@joe-hp4nk]

You can never watch enough engine assembly videos, you can always find a tip that will help. Retorqueing before the pan goes on was a good one, thanks.

[@goldsgarage8236]

Thanks Joe, glad it was helpful! AG

[@jamessenos1396]

🙏🏻 Thank you Allan … Extremely informative and educational video! 😉👍🏻

[@goldsgarage8236]

Thanks Jimmy! AG

[@GuillermaArteaga]

Very helpful thank you😊

[@J.R._]

I'm waiting to watch your entire series on the budget build before I start my rebuild. Great tips I've never seen before. Thank you for taking the time to share!

[@goldsgarage8236]

Thanks JR, glad you are finding it helpful, that is what we are working for. AG

[@HeadFlowInc]

SCR calculation w/ 64cc head. Cylinders 8 Bore 4.004” Stroke 3.48” Head 64cc Valve relief cc 6.6cc Head Gasket .039” Fire ring 4.100” Deck height .025” (Below) SCR 9.53-1 *** I adjusted the fire ring to 4.100” but it could be 4.125” on the Felpro Perma-torq gaskets.

[@goldsgarage8236]

Thanks HeadFlow, we are using a steel head gasket, .015” I think.

[@HeadFlowInc]

@@goldsgarage8236ou’ll need to do something to account for the pistons being .025” below deck if you want 10.0-1 compression. Yes a .015” head gasket can get it up to +- 10.09-1; But it’s not worth spending much money on because 1.66% difference in HP/TQ isn’t much.

[@HeadFlowInc]

A full number of compression ie 9.0-1 to 10.0-1 only account for +- 3-4% HP/TQ If we adjust the SCR from 9.52-1 to 10.0-1 or +-1.92% In your example 1.66% change. Adjusted SCR 10.0-1 ICL 104° 361hp @5000 rpm 461tq @2500 rpm Average 288hp 397tq ICL 108° 366hp @5000 rpm 453tq @2500 rpm Average 291hp 397tq

[@goldsgarage8236]

Thanks for doing the calculations and sharing all this information. We will be very pleased if we can make the great low end torque that you are predicting. AG

[@jjmccloud]

Rebuilding my l31 vortec but putting a carb and intake on with aluminum heads. Block is in good enough shape to stay with stock bore and rotating assembly with a quick dingle ball hone. But im kinda wanting to swap pistons out for some flat tops. Would I be ok without doing a complete rebalance with new pistons? If so ill probably just stick with stock D dish pistons but if it'll be ok without a balance ill change pistons, maybe add 150 shot then

[@goldsgarage8236]

Thanks JJ. If you have a gram scale you might compare the weight of the new pistons compared to the original ones. Unless there is a big difference or you will be operating at high RPM for and extended period, I wouldn't think you need to rebalance. AG

[@jjmccloud]

@@goldsgarage8236 Thanks!

[@kenlelon369]

1-1/4 hex socket will turn that crankshaft a little cheaper

[@bryanbeggs9461]

No support ring underneath the bottom scraper ring?

[@Bigislandguy]

Is it normal to have 15-20% leakage through the rings with the leak down tester? But I have 160 psi on every cylinder except for one has 155

[@Bigislandguy]

Cold motor 70degree ambient temperature

[@goldsgarage8236]

Results can vary dependent on the tester and conditions, but yes 15-20% is not something i would worry about. On my tester, 10-15% is normal and anything under 10 is great. Hope this helps. AG

[@trevorfraser6235]

Perfect turbo motor with that ring gap

[@goldsgarage8236]

Thanks Trevor. For sure ring end gap will not be a problem. AG

[@amateurism1]

First!

[@goldsgarage8236]

Thanks for the compliment. AG

[@terryball3064]

Excellent Videos

[@goldsgarage8236]

Thanks for your comment Terry. Motivates me to keep going. AG

[@mediumjumbo7484]

👍👍👍

[@goldsgarage8236]

Thanks Medium. AG

[@tomstrum6259]

Very Good engine Assembly tips.....Something I do at This Assembly stage is to Carefully measure & Record crankshaft Only rotation Break-away FtLb Torque & Compare to Carefully installed #1 Piston & Rod Total crankshaft Rotation torque Increase.....Each Additional installed Piston & Rod assembly should Add identical Same FtLb crankshaft Rotation torque Incremental Increase as Each is Assembled if Rings installed Good Without hidden cracks.....

[@goldsgarage8236]

Also a good idea. I always rotate the crank after each piston but I don't usually measure torque after every piston. Attention to detail. AG