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Thread: How Much Boost Can a Stock Engine Take? - Engine Masters Ep. 26 Reply to Thread
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Topic Review (Newest First)
02-11-2018 03:58 AM
The Torch
Quote:
Originally Posted by Maniacmechanic1 View Post
I have seen Big Chevys crack right in 1/2 or straight down the Mains into the lifter valley from big nitrous.
That would suck BIG time
02-11-2018 02:20 AM
Maniacmechanic1
Quote:
Originally Posted by 72SBVet View Post
I like when they did the nitrous on the 305. The top ring butted together and it knocked a chunk of piston out, but it didn't hurt the bore very much. Always heard that boost had more stress on the piston and not the rods as opposed to nitrous which puts more stress on rods.
Centrifugal Superchargers have a different Boost Map curve than Roots Superchargers.

Nitrous hits so mean when you use it in straight 350-750-900 HP Shots.
I have seen Big Chevys crack right in 1/2 or straight down the Mains into the lifter valley from big nitrous.
02-10-2018 09:13 PM
72SBVet I like when they did the nitrous on the 305. The top ring butted together and it knocked a chunk of piston out, but it didn't hurt the bore very much. Always heard that boost had more stress on the piston and not the rods as opposed to nitrous which puts more stress on rods.
02-10-2018 07:44 PM
Maniacmechanic1 Dry sump is not used by many because the cost to setup Drysump on a SBC & BBC Is around $3500-5000.
Used in High End Drag Racing & Road Race Cars.
Also used in all Dirt Track Race cars other than Street Stock V8 class & 4 cyl entry classes.
02-10-2018 07:41 PM
Maniacmechanic1 On a Corvette Yes it helps.
02-10-2018 07:35 PM
Pops71lives Any advantage to dry sump? Certainly more volume. Just curious.
02-10-2018 07:18 PM
Maniacmechanic1 Might be getting ahead for a few new guys...
The Number 1 killer in many Boost Power adder engines is lack of oil control or actual engine oil into the combustion chamber.
Either from valve guides, valve stem seals, piston to cylinder wall clearances, piston rings themselves not sealing proper.

Add oil in under Boost and its Instant engine failure.
It Blew up.


Recalling one Pontiac Guy stating he pushed to 800 HP on Kieth Black Hyper pistons.
He was telling the Truth.
02-10-2018 06:52 PM
Maniacmechanic1 This Test Session Also Proves the Old 5/64" GM Piston Ring Packages are not really that bad after all.
Something I have known myself for a long time.

No Piston Ring Blow By under boost.
No crankcase evacuation pump used.

Thin piston rings was heavily promoted by David Vizzard.
They are pretty much obsolete now the old GM piston ring packages stock.
02-10-2018 06:46 PM
Maniacmechanic1 765 HP.

Not Bad.
02-10-2018 06:31 PM
Maniacmechanic1 60 W Racing oil in this test.
Beating the shit out of this engine.
02-10-2018 06:29 PM
Maniacmechanic1
How Much Boost Can a Stock Engine Take? - Engine Masters Ep. 26

https://youtu.be/n9pykOaMs5I

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