Forced Induction - Supercharger vs. Turbo Charger

mumbojumbojj Says:

Sep 10, 2010 - its not like there is NO bad effect of a turbo, a turbo will add some backpressure to the exaust wich will lower engine power.

Warblade118 Says:

Sep 10, 2010 - @SuperJimrod I realize it would take a lot to make that kind of power out of a gas engine. But considering the entire cost of your diesel engine, + the money you’ve put into it, I could build a LOT of power out of a gas engine. As far as HP vs. TQ. TQ is the amount of work and engine can do, HP is the rate that it does that work. A 2000HP 1500ft/lbs gas engine would walk all over a 600 HP 1500ft/lbs diesel engine. But the diesel would still have certain advantages I’ve already discussed.

SuperJimrod Says:

Sep 9, 2010 - @Warblade118 Have you ever heard the saying "horsepowers sells cars but torque wins races"? For towing you need torque and a lot of it. Semi engines produce only about 500-600 hp but torque is about 2000 ft/lbs. I am not familiar with gassers but i know their known for speed and hp. And to get 2000 hp from a 7l gasser with 45 lbs of boost would require a completely new engine built from scratch. My truck's engine is fully intact!

Warblade118 Says:

Sep 9, 2010 - @SuperJimrod Couldn’t get more than 750 ft/lbs? As I said, if your running 45pounds of boost into a 7L gas V8 your looking at around 2000-2500HP and around 1500ft/lbs of PEAK torque. If its turbocharger the overall torque curve will likely be peaky as opposed to your diesel that has a very flat torque curve. That’s one of the great things about diesel, about no matter were in the rpm range you floorboard the thing, its gonna have a ton of torque. Just nowhere near the horsepower as a gas engine.

SuperJimrod Says:

Sep 9, 2010 - @Warblade118 Yes the hp would be incredinly high but torque ( i dont know much about gassers so correct me if im wrong) would be rather low? I am not sure, yes it would still be high but i dont think you could get more than about 750 ft/lbs torque.

Warblade118 Says:

Sep 9, 2010 - @SuperJimrod Ah, a 6.4L then. My point was that with 45psi a gas motor HP and torque would be off the charts. You mentioned it only cost you 2K worth of parts for 600HP but you left out the price of a turbo diesel engine. They tend to be pretty pricey. It would ONLY take 2k (a 177 supercharger) for my little 383 to make 600HP too…if I didn’t count the 700$ for the block and machine work, the 1500$ bottom end, the $2000 heads, the $600 carb…well, you see what I mean.

SuperJimrod Says:

Sep 9, 2010 - @Warblade118 My main towing diesel is a 2008 ford powerstroke with the 6.4l diesel. And I dont think u could get more than 700 hp with out a major over haul on the entire drive train. The great thing about a diesel is the more power u put into it the better gas milage you get out of it. Stock i was getting 12 mpg's and 350 hp at fly wheel. Now with just intake, exhaust and tuner im getting 18 mpg's and 600 hp and 1300 ft/lbs torque. I dont think a gasser can do that with less than 2k$ of mods.

UR50SLO Says:

Sep 9, 2010 - You are totally clueless! Why are you informing people of somthing you obviously have no idea about. Go build a couple superchared setups and then go build a couple Turbocharged setups.. Then document what you did and the power.. streetability and economy of them. I'm betting you'll come up with a different idea of what Turbo's are all about.Looks like only 14 people out of 600 have a clue.

lilbladeboi Says:

Sep 9, 2010 - @1390arosa Why??? defeats the purpose...

Warblade118 Says:

Sep 9, 2010 - @SuperJimrod Well, as much as I respect diesels for their towing power, to be fair to a gas engine at 45psi (You mentioned Ford so I’m assuming your engine is the 7.3L) I would expect a 7L gas engine to put out north of 2000HP and at least 1500ft/lbs. the difference of course is the gas engine wouldn’t get the mileage, would take higher rpms, and the torque curve would be higher in the rpm range. It would also be overkill unless your trying to pull a semi tuck to the track or something.

SuperJimrod Says:

Sep 8, 2010 - @Warblade118 i wouldnt buy a gasser to tow more than 10k lbs. lol. turbo or super they cant match the amount of torque a diesel had. My truck is pushing 650 hp and 1400ft/lbs with just intake, exhaust, spartan chip and suncoast built tranny... and some little things just to insure reliability at 45 psi of boost.

Warblade118 Says:

Sep 8, 2010 - @SuperJimrod For a diesel turbo is definitely the way to go. I wish the truck I have that tows my race car to the track was a diesel. If your truck was gas though, I’d definitely make the argument that it needs a good old roots under the hood for towing.

SuperJimrod Says:

Sep 8, 2010 - I know im not bashing on you it just that i dont want to start a youtube fight lol. But yes i know that the roots charger can deliver large amounts of boost similar to a turbo but in my OPINION i would pick a turbo. My job is to haul around 30 foot gooseneck trailers filed with cattle, hay or manurer. I like turbo's because when im at 65mph with 30k lbs loaded i will floor it goin up a hill and i will speed up. But i have not drivin a supercharged diesel. My truck is 08 f-250 turbo diesel

Lchinof15 Says:

Sep 8, 2010 - good info dude

Warblade118 Says:

Sep 7, 2010 - @SuperJimrod I didn’t say you where bashing anything, nor did I say that turbos were incapable of high boost, that’s kinda what they’re known for, but roots can make high boost too, even in less extreme situation than a top fuel engine, they just pay a different price. I just found your statement “(roots) run out of air” misleading. There not unlike an oil pump. The faster you spin them, (assuming 100%VE) the more they pump.

SuperJimrod Says:

Sep 7, 2010 - @Warblade118 Yes the roots are capable of flowing large amounts of air , like you said an extreme case, but my 2008 ford diesel which is chipped can make 55 psi of boost with stock turbos. but this is running very close to catastrophic failure but this shows that turbos can make a large amount of boost at the high end. Am i bashing on super chargers? No, im just stating my opinion

Warblade118 Says:

Sep 7, 2010 - @SuperJimrod Roots supercharges don’t “run out of air” top end. The 14-71’s on a top fuel engine runs north of 50+ psi with air exiting the blower at over 200mph. (extreme example, but it lets you know what roots are capable of) The problem with roots (aside from parasitic loss) at higher speed/boost is heat. Turbo’s don’t suffer as much largely because they are not a positive displacement pump.

Marshmallowrex Says:

Sep 5, 2010 - turbos are better fuck s/c's

1390arosa Says:

Sep 5, 2010 - i don't have to decide which is better, my car has one of each :)

jonesliuquan Says:

Sep 4, 2010 - it is so useful for me! thx a lot!!

TheFrosty64 Says:

Sep 3, 2010 - dude. find something better to do. Lame.

z3r0zx1 Says:

Sep 2, 2010 - To save you 8minutes. Superchargers for stock cars. and turbo's for Preformance cars. Turbos are more likely to stuff up your engine and are harder to install. But Superchargers have a faster start off but turbo's overall go faster due to higher PSI.

SuperJimrod Says:

Sep 1, 2010 - @deepdint i think if u put 2 little gassers with same motor and slap a turbo on on and a super charger on the other one with similian specs the turbo will win because of the high end boost. The supercharger will kill the turbo from a stop but in the high rpm when it runs outa air the turbo will fly by.

SuperJimrod Says:

Sep 1, 2010 - @priman0cte I respect everyones opinion. I have a 2004.5 dodge 2500 cummins with an aurora 3000 and aurora 5000 ( twin turbos custom fabrication by me!!!) and i haul hay, haul cattle, race, run 11s and make 750 hp. Of coarse with twin cp3's, fass, head studs, injectors and so on, but the 3000 turbo is for low end (minimal lag) and 5000 turbo is for a lot of boost on the top end. So when im hauling hay ( 20000 lbs. with trailer) i use 3000 to get going and 5000 to keep going.

SuperJimrod Says:

Sep 1, 2010 - @OzzInter um yes turbo chargers with vgt can be made to lag on purpose but as long as theirs even a slight exhaust flow their will be boost. No way around that. Trust me i own 6 turbo diesels.