What gives? How come we see rams dyno at like 180hp at the wheels (so like 230 at the crank), and no one can seem to pull any power out of them without stroker kits or forced induction (meaning 50+ horsepower) but yet Mopar sold crate engine 360s rated at 300hp with a completely stock production bottom end and cam, with the only functional differences being a carb intake/carb.

Then, the HotRod guys can bolt on a conventional distributor, msd ignition, new carb, and long tubes and get one to put down 319 horse at 4400 and 425 lb-ft at 3700. That's with the stock bottom end! Are we to believe that the addition of multi-port fuel injection kills nearly 100 horsepower and torque?

I understand that they aren't running all the drive accessories and that the stock tune on the injected motor isn't as performance oriented, but if that were the issue, a custom tune, long tubes, and a better ignition should match or exceed the 319/425 figure(at the crank anyway)...but I haven't seen that on the forums. You only see guys getting those numbers out of strokers or at least with a big cam. On stock displacement motors with stock camshafts, guys report essentially no difference with headers(Steve Dulcich confirmed this on engine masters or hot rod garage), maybe 10 horsepower with a tune, and nothing with ignition. Furthermore, the addition of an M1 or Hughes Intake doesn't appear to make up the difference either(30 horse maybe?), but rather add some power and shift the operating range up the band.

This just seems like a common theme to me. If you watch the shows or read the mags, the guys grab an injected motor, swap the intake, put a carb on it(they do it for convenience, not power), and pick up 50 horsepower instantly. Yet guys on forums who have the injection still in place, have them custom tuned and don't see near those gains. I just don't get it.

 

The crate motors do NOT have the same cam as the truck motors........ and that is likely where most of the power comes from.

 

Can you confirm this for the 300hp version? I've ready several articles that have said that it was the same. It's different on the 380hp version for sure.

Links to the engines in question?

 

So where are they claiming the additional 60 horsepower is coming from? Or are they simply overrating the engine? (no one would ever do that......)

Links to the engines in question?

 

You can get a power increase like that with a set of good heads

Post #19 for the dyno sheet
https://dodgeforum.com/forum/2nd-gen...installed.html

 

Sheriff beat me too it. Way better flowing heads and intake.Those alone can make up for an asthmatic cam, or at least help. Really the stock 5.7 that replaced the 5.9 didn't really have much more cam, just heads and an intake that flow ridiculously well. A mild towing type 5.9 cam has more lift and duration than a 5.7 hemi but it isn't putting down more "power" than the 5.7 probably more torque though.

 

Not to mention that the 5.7 is a hemispherical head design and the 5.9 is a wedge.

YES!!! I know the "crate" LA motors had different internals than the stock ones. Would like to see the ones you are talking about.

 

"They" don't mention anything. The 300hp version doesn't seem to be available anymore so I am just going off of this article by Steve Dulcich: http://www.hotrod.com/articles/hrdp-...-mopar-engine/ in that article he explains that the 300hp version shares the same crank, pistons, heads, cam, etc with the production truck/van engines. Then goes on to modify it. If he explained the difference I wouldn't have needed to post a thread.

That's not the point, in this case, the heads are the same.

Whatever used to be available from Mopar and mentioned in this article: http://www.hotrod.com/articles/hrdp-...-mopar-engine/ I am more interested generally speaking in why I read so much about guys yanking fuel injection off of motors, bolting on a carb, and picking up big power. It seems counter-intuitive.

 

Sounds like a great question for Steve Dulcich...

 

Haha you find me his email and I'll get right on that.

I'm not about to submit a question on their facebook page and then watch 500 Q & A sessions hoping they will answer it.