Does anyone know an affordable way to get more horse power out of the 5.7 Hemi without rebuilding the engine. Suggestions would be appreciated.
When you do the cam, did u upgrade the springs too?You've got lots of options, none of which require rebuilding the engine. The more dramatic ones require some dis-assembly, but not rebuild. Prices and performance vary from opinion to opinion, build to build, and specific product choices made. These are rough numbers to give you a general idea how things work ONLY.
- Cold Air Intake Price: $200ish. Result: Maybe a couple HP, mostly an enabler.
- Tuner Price: $400ish. Result: About 15 HP, can improve with enabler mods.
- Cat-back Price: $800ish. Result: Maybe 5 HP, mostly an enabler.
- Shorty headers Price: $1,000ish. Result: Maybe 5 HP, mostly an enabler.
- Long-tube headers Price: $1,200ish. Result: Maybe 10 HP, mostly an enabler.
- Cam Price: $1,500ish. Result: anywhere from 50 HP to 75 HP.
- Heads Price: $2,000ish. Result: Maybe 20 HP.
- Supercharger Price: $8,000ish. Result: 100+ HP.
Basically, you can stack all of these to net the most performance. When I say "enabler", the idea is that for instance, if you just did a supercharger, you might get significantly less performance out of your car than if you also had the intake and exhaust upgraded. It's generally a reasonable approach to start cheap and work your way up the food-chain.
I've got everything but the supercharger and heads (and am using shorties), and while I haven't been dyno tested, my 2008 5.7 should be doing somewhere around 410 to 420 at the crank, where it was 350 stock, net improvement of maybe 60-70 HP, while staying a great daily driver. I could have gone with a more aggressive cam, for instance, but stayed fairly mild.