5.9 Magnum block limit

Posted By: 496 A-body

5.9 Magnum block limit - 04/29/14 07:00 PM

Anyone know how much horsepower a 360 Magnum block can safely handle.
It would be 1/2 filled and have main studs. Is there a strength difference between them and a LA 360 block?

Posted By: RawnDart

Re: 5.9 Magnum block limit - 04/29/14 07:06 PM

Nobody has actually found a hard limit on a Magnum block at all that I'm aware of.

Posted By: 496 A-body

Re: 5.9 Magnum block limit - 04/29/14 07:23 PM

Quote:

Nobody has actually found a hard limit on a Magnum block at all that I'm aware of.

Not looking for a failure point, more so a level where splitting a cylinder wouldn't be a worry.

Posted By: JD Dart

Re: 5.9 Magnum block limit - 04/29/14 07:23 PM

Quote:

Anyone know how much horsepower a 360 Magnum block can safely handle.
It would be 1/2 filled and have main studs. Is there a strength difference between them and a LA 360 block?

Ask on dakotart.com 1 guy found the limit and spit the block in half running a turbocharger.

Posted By: MR_P_BODY

Re: 5.9 Magnum block limit - 04/29/14 07:31 PM

I'm pretty sure dizuster (Scott) is running a magnum
block with his turbo... he is around 700hp

Posted By: Duner

Re: 5.9 Magnum block limit - 04/29/14 08:32 PM

I'm not sure where the limit is either�. and I don't WANT to find it personally.

In the 700hp neighborhood with mine for a long time.
(133.65 mph @ 4190#)

Dyno said 705 rwhp - but the timeslips say otherwise.

Factory main bolts, 2-bolt block, no fill�.. turbo.

I think the Magnum blocks are stronger than people give them credit for.

Posted By: RawnDart

Re: 5.9 Magnum block limit - 04/29/14 08:46 PM

Quote:

Quote:

Nobody has actually found a hard limit on a Magnum block at all that I'm aware of.

Not looking for a failure point, more so a level where splitting a cylinder wouldn't be a worry.

What are your goals, then?

I'm running a stroked 318 magnum at a bit less than 500 on a regular basis, and I sprayed a 175 shot at it for about 50 passes when it was in my truck. It's now living happily in my a-body and getting ready to race more this season.

Posted By: TheOtherDodge

Re: 5.9 Magnum block limit - 04/29/14 08:52 PM

I am also around 700 hp with a turbo and so far so good. I plan to push it to around 800 late this year.

Posted By: 496 A-body

Re: 5.9 Magnum block limit - 04/29/14 09:03 PM

Quote:

Quote:

Quote:

Nobody has actually found a hard limit on a Magnum block at all that I'm aware of.

Not looking for a failure point, more so a level where splitting a cylinder wouldn't be a worry.

What are your goals, then?

I'm running a stroked 318 magnum at a bit less than 500 on a regular basis, and I sprayed a 175 shot at it for about 50 passes when it was in my truck. It's now living happily in my a-body and getting ready to race more this season.

Not sure exactly how much horsepower it would make. Have a set of the new race 48� W2s (47cc), Jesel 1.6 rockers, and a K1 4.125 stroke crank. Been thinking about building a mild solid roller cammed 419 (around 11.5:1) using a 5.9 Magnum block but have been concerned with some of what Ive read with people claiming split cylinders at under 600 horse and I really dont want to buy a R-3 block. Id guess It would be over 600 horse based on this thread
https://board.moparts.org/ubbthreads/showflat.php?Number=6135034

Posted By: RawnDart

Re: 5.9 Magnum block limit - 05/01/14 09:59 PM

The 600HP number is a myth. I know of many that are running well above that mark on a regular basis, and those engines get the snot kicked out of them with no ill effects.

Build it, half fill it, and run that [Edited by Moparts - Family Friendly Site - Keep it clean].

Posted By: 496 A-body

Re: 5.9 Magnum block limit - 05/02/14 02:49 PM

Quote:

The 600HP number is a myth. I know of many that are running well above that mark on a regular basis, and those engines get the snot kicked out of them with no ill effects.

Build it, half fill it, and run that [Edited by Moparts - Family Friendly Site - Keep it clean].

Good to know, I had concerns. I saw a 360 block on racing junk that had all 8 cylinders sleeved and had 4.125 bores. Seemed cool but all that machine work would probably be close to the cost of a R-3 block.