Triton v8

Because for a truck you can get that power sooner in the RPM band but with a turbo you've have to wait til' your rpm's are up for the turbo to start spooling. I've heard that diesels have turbos because of the low compression that the engine makes.

iluvmyford

shoot I am not experienced enough to know what would suit my driving needs the best. I have also heard so many stories about supercharger being better than turbo and then turbo being better so me, myself and i have no ideal. If and when the money is right then ill do some serious deeper looking.
The things that I would want to know is this, if you have a truck for pulling a boat which is better for pulling that boat up a might hill. I would thing the system the produces the most torque... any ideas?

JohnC

The difference is with a Roots or twin screw superchargers such as Roush, Whipple, and Kenne Bell you have all most instant (.4-.6 seconds) peak tq. to use when you need it. They feel more like a Nos hit or big block. The turbos as mentioned have to spool up with your engine RMP's to obtain maximum tq. They will both will get the job done but in different ways. I have a turbo F250 and a F350 trucks for pulling they are great. I also have a Twin Turbo Porsche thats modded to over 560 AWHP thats very fun. I had an 03 KB sc Cobra that was very fast and fun. For me I like them both but If I had to pick for my 08 F150 at this point I would go with the Whipple sc. It's cheaper and is capable of putting out more HP than our stock engines can handle. Of course you can just change pulleys and tuning on the sc's and get your HP where you and your engine are happy. Whatever and when ever you pick a power adder for your truck just don't pick the centrifugal (snail) type supercharger. They are gutless for low boost and you have to wait for the peak to come in like the turbo's but your end results will be lower especially in the tq. department where trucks need it the most. PS sorry for the long post.

metalman

ow! was that a slam on the Vortech? Unfortunately, there are very few choices for the older model 4.6. You can still hit 1000 cfm in a heartbeat with the right setup. You are spot on with too much hp for stock motors, I learned the hardway. After 7 lbs of boost you can kiss the rings goodbye. I believe that the once you have made a choice of power adder then the expensive part really begins. I heard from one gear head, "You will spend 20% of your money to get the first 80% of your power and then you will spend 80% of your money to get the other 20% of your power"

BoatBoy1069

I maybe wrong but I don't think I am because of what I'm told! A diesel engine has outrageous compression (I think the ratio is something in the area of 15:1)! That is how the engine makes the fuel ignite. High compression = lots of heat = the fuel going BOOM! However the diesel engine uses a turbo because the redline on a diesel is very low, and to help this a turbo is usually put on! Unlike gasoline, diesel fuel runs off of detonation not caused by a spark, but rather compression. If this happens in a gasoline engine (the term is often coined as pre-detonation) the result is usually not good! But in a diesel this must happen! Therefore the only problem a diesel has is not getting enough oxygen into mix with the fuel (which causes black smoke or un-burnt fuel)! The turbos job is to add more oxygen, and because the motor isn't spinning fast enough a turbo is added! Hope that make sense how i wrote it!

naplesbill

The easiest way to determine which will be better is to compare the dyno sheets of both and see what the power curve looks like. Of course you'll need to see dynos on the same drivetrain to make a fair comparison. The current generation of Turbos have eliminated most of the lag that the old turbo systems had. The way you drive is also a factor and a SC has some parasitic effects. Naturally, those effects have been greatly reduced with recent designs as well. I think the line of thought is high-compression is better suited to turbo and low compression is better suited to SC. I've heard that stated numerous times but don't know enough to say it's entirely true. It does make sense though.

grimmdta

well here is a lil more info on turbos vs superchargers since all of u are talking about what diesel turbos and turbos from the 80s 90s are like.


http://ststurbo.com/sts_technology

and here is an nother one. and if u look on the side of the page there will b a tab that says turbo vs supercharger click on that

http://bankspower.com/Twin-Turbo-ima...PowerGuide.pdf

blackbetty

find a 4.6 s/c for a 04+

honestly not to bust ***** but it seems to me that alot of misconceptions and a lack of knowledge exist here....for example if you had any knowledge of a a/f gauge then you would know a af gauge is a wideband....or narrow...but the narrow is a waste of money...

school up...im going to turbo if i dont go motor and your going to need to go custom either way...

Triton v8

^^^ Yeah what Betty said. When I had my Grand Prix I was on www.clubgp.com and soo many people added turbo and superchargers and ended up blowing trannies and engines. If you're going to run it hard ((which you will)) do yourself a favor and do some internal work before adding a power adder. If you just add one on a fully stock engine and run the heck out of it YOU ARE going to have engine problems.

iluvmyford

i still like the old school of making hp... i had a 396 bored out to a 402 (28 over) had an oem L88427 solid lift cam used factory high rise intake, holley 850 electric fuel pump and head had a wonderful head job done.. gettin 550 hp out of it.. 12.5 compression with a 456 gear i was in the 8th but with a 411 gear 1/4 mile was awesome... the only thing in this engine that wasnt oem was moroso windage tray. cost me 1500 thanks to some friends with discounts...6 miles to a gallon but you could not knock the smile off my face with a sledge hammer