You might get the tiniest bit of net power gain (power gained from cooling - power lost to drive AC system) if you put a lot of work into designing the system.Have a question that has been nagging me and can tell from reading posts, more intelligence and familiarity with diesels,turbos and intercoolers/aftercoolers than I'll ever have. Am curious if a person could use A/C system as a intercooler/aftercooler to get a denser charge of air and lower EGT's. Like an "on demand" system, seems it would be handy pulling steep grades or towing applications. Would the tradeoff be worth the while(hp drawn vs cooler EGTs) or would they pretty much cancel each other out? Input appreciated. Ive heard(not sure if true) some supercharger appl. might be using this method (Eaton, Kenne Bell)
The problem with a supercharger is that it takes power from the motor to turn the charger. Belt drive is a drain. With a turbo the power is exhaust gasses that come nearly free. Top fuel drag cars loose over 300 hp driving the supercharger, but with nearly 5000 hp they don't miss it. The supercharger power does come on earlier. It is nearly linear with RPM. This means that it doesn't make full boost until you are at top RPM. I does give boost from idle though and there is no spooling up. A supercharged gas hot rod on the street is a blast! ($$ticket time$$) A supercharged diesel may not be. For the 3.9 - 400 hp level I think a turbo is unbeatable. Check out the Hot Rod magazine, you'll see that the turbos are becoming the power adder for the Mustang, and now Chevys. They were always the prefered power adder of the 4 cyl gas motors. I can talk gas, but I'm diesel dumb.Just out of curiosity, has anybody considered supercharging one of these little motors?
It is so obvious that there must be something wrong with the idea, but while I had a few boost gurus monitoring the same thread closely I just wanted to ask. (I might should have started my own thread)
I know alot of the old screamin' detroits were supercharged though I think they were 2 cycle. I remember hearing somewhere that superchargers boost was more linear and didn't spike as drasticaly as turbos. It seems to me therefore it would make more streetable power.
Somebody correct me where I'm off I'm just a newb.
Well great minds think alike! I ordered the motor to put in a wrangler, but ended up with a molly cage, fiberglass body, and shooting for under 3000lbs.:rasta: The one thing that is different than gas cars, is that you are turning only half the RPMs. I rolled the chassis in on 28 in tires, but to be able to get some speed out of this on the big end I had to go with 33x12.5s. Just think..if my buddy can shoot 8000lb dully into the mid 11s, what can I do at 3000lbs, and two cylinders less.....HMMMM :grinpimp:HI all new here, but have to ask if the 4 cyl 4bt can be built to 250~300 hp why not put into a <2600lbs car? With the rite transmission should make a very fast streetcar? Or m I missing something here...
Ohh yeah it is still alive. And will be until I get this thing together and on the Dyno. But at the pace I will be moving I'm sure someone will beat me to the punch...Goal July 4th, 2009This thread is still alive?
Someone get one on a dyno putting out 400hp.
I want to know how you did it.