Max rpm with 2 bolt main caps

[Falco78]

So what are the limits of the ARP mains on a 2 bolt setup as far as rwhp and RPM? Trying to decide if a 4 bolt splayed will be a must or not.

[SSlowBoat]

So what are the limits of the ARP mains on a 2 bolt setup as far as rwhp and RPM? Trying to decide if a 4 bolt splayed will be a must or not.

if you're using arp bolts on the mains, you need a line hone anyway, splayed caps are cheap insurance. I'd spend the money if boost or nitrous are in plans for above 500 whp. if not, gamble.

fyi the stock rods are the weak part of an lt1

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[Falco78]

if you're using arp bolts on the mains, you need a line hone anyway, splayed caps are cheap insurance. I'd spend the money if boost or nitrous are in plans for above 500 whp. if not, gamble.

fyi the stock rods are the weak part of an lt1

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No it will be part of a stroker short block I am hoping to get. I have been looking at one from VRE http://www.victoryracingengines.com/...TX&BLOCK=SHORT

Description:
Victory Racing Engines 396ci LT1 engine rounds out our LT1 line-up. It is the largest LT1 engine we produce. Whether you are looking for a street/strip package or looking for an all out race combo, the VRE 396 LT1 is the pinnacle of LT1 Performance.
Specs:
Compstar 3.875" Stroke 4340 Crankshaft
Compstar 6.000" H-Beam Rods
SRP -5cc Flat Top Pistons
Mahle Rings
Clevite Rod Bearings
Clevite Main Bearings
Clevite Cam Bearings
ARP Main Studs
Balance Rotating Assembly
Fully Machine Block w/ Deck Plates
Blueprint and Assemble
Options:
Fel-Pro Head Gaskets $39.99ea
Cloyes Timing Set $90.99
Comp Cams Camshaft $245.99
BBK 58mm Throttle Body $309.99
Piston Coating on Skirts and Tops $315
ATI Harmonic Balancer $379.99
ARP Head Studs $124.99
Upgrade to Callies Dragonslayer Crankshaft $500
Upgrade to Diamnd Pistons and Rings $250.00
Price:
$3700.00 *No Block Core Requirred*

[SSlowBoat]

No it will be part of a stroker short block I am hoping to get. I have been looking at one from VRE http://www.victoryracingengines.com/...TX&BLOCK=SHORT

Description:
Victory Racing Engines 396ci LT1 engine rounds out our LT1 line-up. It is the largest LT1 engine we produce. Whether you are looking for a street/strip package or looking for an all out race combo, the VRE 396 LT1 is the pinnacle of LT1 Performance.
Specs:
Compstar 3.875" Stroke 4340 Crankshaft
Compstar 6.000" H-Beam Rods
SRP -5cc Flat Top Pistons
Mahle Rings
Clevite Rod Bearings
Clevite Main Bearings
Clevite Cam Bearings
ARP Main Studs
Balance Rotating Assembly
Fully Machine Block w/ Deck Plates
Blueprint and Assemble
Options:
Fel-Pro Head Gaskets $39.99ea
Cloyes Timing Set $90.99
Comp Cams Camshaft $245.99
BBK 58mm Throttle Body $309.99
Piston Coating on Skirts and Tops $315
ATI Harmonic Balancer $379.99
ARP Head Studs $124.99
Upgrade to Callies Dragonslayer Crankshaft $500
Upgrade to Diamnd Pistons and Rings $250.00
Price:
$3700.00 *No Block Core Requirred*

too cheap, I wouldn't get it. a 396 you should have 4 bolt for. heavy crank and rotating assembly.

you should talk to Karl Ellwein if you want a 396 lt1 that will survive

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[Stormyweather]

https://golenengineservice.com/engin...lock-396-550hp Just showed this as a price comparison


Plus there is https://www.tpis.com/pages/402lt1 a 402

402%20LT1.jpg


ooooh yeah Good luck dude remember its
It's not how fast you mow. It's how you mow fast.

[Falco78]

After looking into this a bit further I am going to be doing a 383 as it just makes more sense especially with longevity being a consideration.

[MoeHorsePower]

A good balance job and detonation is your enemy, keep those two in sink and you are good to go... how do I know this,
722 RWHP, stock crank, 2 bolt.

[SSlowBoat]

A good balance job and detonation is your enemy, keep those two in sink and you are good to go... how do I know this,
722 RWHP, stock crank, 2 bolt.

true, but it's not a stroker 396. I do trust your judgement though moe

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[MoeHorsePower]

true, but it's not a stroker 396. I do trust your judgement though moe

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Does not have to be a stroker, as you know, RPM is the killer and if you have a bad balance job, the rotating assembly is not in perfect harmony it will cause basically vibrations in the upper RPM band, along with detonation, this will make your main caps "walk" resulting in catastrophic failure, back in the day with the ole 302 Z28"s, people were spinning those to 8000 RPM! from the factory, yes eventually a rod would peek out for some sunshine, but GM's engineering was pretty spot on as far assembling a performance motor with their balancing of the bottom end.

[Falco78]

Does not have to be a stroker, as you know, RPM is the killer and if you have a bad balance job, the rotating assembly is not in perfect harmony it will cause basically vibrations in the upper RPM band, along with detonation, this will make your main caps "walk" resulting in catastrophic failure, back in the day with the ole 302 Z28"s, people were spinning those to 8000 RPM! from the factory, yes eventually a rod would peek out for some sunshine, but GM's engineering was pretty spot on as far assembling a performance motor with their balancing of the bottom end.

Well a good stroker 383 being limited to 6200 RPM's should provide me with a long lasting engine based on that if it is built right. Still looking into my main options, but a good played cap main or possibly just an ARP main might be sufficient. Still weighing all the options as I don't want to have to redo it later.