Piston Speed
Member
Howdy everyone,
I have an interesting choice here.
I have a complete 5.9 Magnum with around 90k miles on it that came out of a '03 Ram.
I also have a '72 Dodge Demon that I'm currently doing bodywork on.
I'll likely build up the 5.9 to as hot or hotter than the 390hp 360 Magnum crate specs (change cam, run carb, buy heads from IMM).
I'm thinking about doing one of the following:
1) Fabricate a turbocharger for the 5.9 (flipping the exhaust manifolds in the process) with low to mid boost (the Dakota guys have run 10-15psi on a stock shortblock without problems but I'll probably keep it below 10).
OR
2) Run the hot 5.9 as is and buy another 5.9 to build into a 408 stroker short block, then later swap the heads, carb, new cam and headers to the 408 and swap the engines out.
The car is currently a shell on a rotisserie so I'm more or less starting from scratch. I think the cost for fabricating my own turbo kit will be similar to building a 408 short block so I think the cost's likely a wash.
My goal is to have the Demon run as close to 11.49 in the quarter mile as possible without going lower because I don't want to put a roll cage in the car (want to be able to use my rear seats). So, assuming a heavy estimate of 3450lb with me in the car filled with gas, I think about 525hp at the flywheel would be my limit.
One advantage I see with this is that turbos seem to like higher rear gears, so even with a 833 I won't need to stop at every gas station while cruising down the highway.
But an advantage to the 408 is perhaps a cleaner looking engine bay that's simpler.
I'm not favoring one or the other right now.
What do you all think? What would you do? Thanks!
I have an interesting choice here.
I have a complete 5.9 Magnum with around 90k miles on it that came out of a '03 Ram.
I also have a '72 Dodge Demon that I'm currently doing bodywork on.
I'll likely build up the 5.9 to as hot or hotter than the 390hp 360 Magnum crate specs (change cam, run carb, buy heads from IMM).
I'm thinking about doing one of the following:
1) Fabricate a turbocharger for the 5.9 (flipping the exhaust manifolds in the process) with low to mid boost (the Dakota guys have run 10-15psi on a stock shortblock without problems but I'll probably keep it below 10).
OR
2) Run the hot 5.9 as is and buy another 5.9 to build into a 408 stroker short block, then later swap the heads, carb, new cam and headers to the 408 and swap the engines out.
The car is currently a shell on a rotisserie so I'm more or less starting from scratch. I think the cost for fabricating my own turbo kit will be similar to building a 408 short block so I think the cost's likely a wash.
My goal is to have the Demon run as close to 11.49 in the quarter mile as possible without going lower because I don't want to put a roll cage in the car (want to be able to use my rear seats). So, assuming a heavy estimate of 3450lb with me in the car filled with gas, I think about 525hp at the flywheel would be my limit.
One advantage I see with this is that turbos seem to like higher rear gears, so even with a 833 I won't need to stop at every gas station while cruising down the highway.
But an advantage to the 408 is perhaps a cleaner looking engine bay that's simpler.
I'm not favoring one or the other right now.
What do you all think? What would you do? Thanks!
