Engine block build

[derb83]

So im getting ready to order a lower end build for my blown 10 ss and was wondering what everyone is running on the bottom end . Currently stock internals / 766 whp ecs supercharged . Was thinking about going 416 or 427 my builder also mentioned stock crank and just swapping rods and pistons . Just looking for some opinions from people with similar setup

[blake-b]

416. A 427 will require a 4.100 stroke crank and the cylinder sleeves in the LS3 block aren't long enough to last with a 4.1 or longer stroke. You can get away with it - for a while. An 11 cubic inch difference will not be noticed.

If you keep the stock crank (which has been proven to last in 1000 crank hp applications) with it's 3.622 stroke, you will end up with a 377 if using a 4.070 bore (.005/5 thousandths over).

If it is in your budget, go with the 416 all day long. You'll like the added torque down low.

I had a 377 (stock crank, forged 4.07 pistons and Calllies rods) with a Ysi. I made over 1kwhp. Then I went to twin turbos and broke something...

[Unavowed]

What's your budget? This could be $5k or $50k depending on parts selected.

[Nighthawk89]

Originally Posted by derb83

So im getting ready to order a lower end build for my blown 10 ss and was wondering what everyone is running on the bottom end . Currently stock internals / 766 whp ecs supercharged . Was thinking about going 416 or 427 my builder also mentioned stock crank and just swapping rods and pistons . Just looking for some opinions from people with similar setup

I just purchased all of my engine forged internals. I decided to stay with stock Cubes cause I have a top mount Twin screw2.3..Here is my build.
Engine Build
- •Callie’s Dragon Slayer Crank APH31T-DS58
- •Callie’s Ultra H beam Rods #U16300
- •Weisco pistons #10-K398X7
- •Weisco Piston wrist pin #10-S718
- •Johnson Lifters 2110R
- •ARP Main Studs 234-5608
- •ARP Head Studs 234-4317
- •LS9 Head Gasket 12622033
- •Clevite Main Bearing set #171-MS-2199H
- •Clevite Rod Bearings #171-CB663P
- •ACDELCO Header Gaskets #12617944
- •Rear Main Seal #89060436
- •Rear Main Cover Gasket #12639249
- •Water pump With Gaskets #257-734
- •Timing cover gasket #12633904
- •Oil Pan Gasket 12612350
- •Front engine cover seal #296-02

[Nighthawk89]

Additionally. Stock crank hopefully he is speaking of LSA crank.. Cause your stock LS3 won’t cut it by any means!

[hillshooter]

Originally Posted by blake-b

416. A 427 will require a 4.100 stroke crank and the cylinder sleeves in the LS3 block aren't long enough to last with a 4.1 or longer stroke. You can get away with it - for a while. An 11 cubic inch difference will not be noticed.

If you keep the stock crank (which has been proven to last in 1000 crank hp applications) with it's 3.622 stroke, you will end up with a 377 if using a 4.070 bore (.005/5 thousandths over).

If it is in your budget, go with the 416 all day long. You'll like the added torque down low.

I had a 377 (stock crank, forged 4.07 pistons and Calllies rods) with a Ysi. I made over 1kwhp. Then I went to twin turbos and broke something...

Stroke doesn't change. 427= 4.0 stroke and 416-418=4.0 stroke. bore sizes change from 4.07 to 4.125.

[fif_gen_powa]

Originally Posted by Nighthawk89

Additionally. Stock crank hopefully he is speaking of LSA crank.. Cause your stock LS3 won’t cut it by any means!

stock ls3 crank has been proven reliable in 1000-1100whp builds

[scv_guy]

Originally Posted by Nighthawk89

I just purchased all of my engine forged internals. I decided to stay with stock Cubes cause I have a top mount Twin screw2.3..Here is my build.
Engine Build
- •Callie’s Dragon Slayer Crank APH31T-DS58
- •Callie’s Ultra H beam Rods #U16300
- •Weisco pistons #10-K398X7
- •Weisco Piston wrist pin #10-S718
- •Johnson Lifters 2110R
- •ARP Main Studs 234-5608
- •ARP Head Studs 234-4317
- •LS9 Head Gasket 12622033
- •Clevite Main Bearing set #171-MS-2199H
- •Clevite Rod Bearings #171-CB663P
- •ACDELCO Header Gaskets #12617944
- •Rear Main Seal #89060436
- •Rear Main Cover Gasket #12639249
- •Water pump With Gaskets #257-734
- •Timing cover gasket #12633904
- •Oil Pan Gasket 12612350
- •Front engine cover seal #296-02

Who is doing the machine work & building the engine?

[blake-b]

Originally Posted by hillshooter

Stroke doesn't change. 427= 4.0 stroke and 416-418=4.0 stroke. bore sizes change from 4.07 to 4.125.

Yes it does if you are seeking 427-429 cubic inches out of an LS3 block that isn't aftermarket sleeved. You'll have to go with the 4.1 stroke. Since OP never mentioned a different block than his stock one, I thought I'd mention the differences.

4.070 bore and 4.0 crank = 416
4.070 bore and 4.1 crank = 427
4.125 bore (either aftermarket block or sleeved stock block to get this bore) and 4.0 crank = 427
https://www.texas-speed.com/p-307-ts...ong-block.aspx

^^^^^Not for arguing purposes but for general and future knowledge to those who come across this thread^^^^^

[Nighthawk89]

Originally Posted by fif_gen_powa

stock ls3 crank has been proven reliable in 1000-1100whp builds

Oh, I know there are plenty of builds making 1000-1100 RWHP on a stock crank.. he’ll even A complete stock bottom end. But don’t include reliable in that claim cause that by no means is the case...

[Nighthawk89]

Originally Posted by scv_guy

Who is doing the machine work & building the engine?

I acquired all of the parts myself. Im still deciding who is going to be doing the work... You considering building yours now?

[BiggFoot]

Originally Posted by Nighthawk89

Oh, I know there are plenty of builds making 1000-1100 RWHP on a stock crank.. he’ll even A complete stock bottom end. But don’t include reliable in that claim cause that by no means is the case...