I don't drive a ford but a lot of ford guys run blowers so I'm lookin for help.

I'm trying to pioneer larger superchargers on a ka24 which is a inline 4 Nissan and produce around 350+whp. I'm looking at larger vortechs to do so or something of that nature.

Are blowers like turbos as far as ratings go? If it will flow x amount of cfm's and hp then it should produce those numbers correct?

 

Same principal, just different drive mechanisms

 

So what about one that can flow 750hp? If I could produce around 450-500whp, thst would be awesome to have a large powerband.

 

The larger the compressor the harder it is to spin one and the more base HP it will take TO spin it. Why a charger that will support 750 when your only looking to make 500?
With any set-up, you want a matching combination

 

I agree....I said a 750hp number as an example.

This is the kind of info I'm looking for. I spin a turbo that can make 700+hp but the power band sucks. I'm not looking to make that kind of power though. I want torque early rather than a short powerband.

Why kind of power do you think it will take to spin a larger blower?

 

look for an eaton M90 they came on the thunderbird super coupe and i believe the supercharged v6's that came in the buicks and monte carlo (u no the front wheel drive pos) that supercharger should give you great off idle torque and be able sto support you through redline. you cna find these things fairly cheap and plentyful. BBK used to make a kit called the instacharger it was a M90 with brakets to bolt onto a 5.0 mustang. it was a great kit but only supported up to 350hp non intercooled in the 5.0 (it was kinda small for the 5.0 but it was a great kit if you didnt want an all out race car) if you have any questions feel free to shared_pm me

 

You are saying 2 contradictory things. Without getting technical or into compressor maps, turbos or centrifugal superchargers capable of supporting 700 or 750hp are not going to generate lots of torque early in the powerband like you state you want..and especially not on a small displacement engine like the 2.4L Nissan.

It sounds like you want turbo responsiveness at lower engine speeds but you are describing it as lower RPM torque with a wide powerband. A properly sized turbo or centrifugal supercharger with a well designed and sized impeller will help with that. Just going with a larger size compressor, be it turbo or supercharger, will not.

 

You out words in my mouth. I'm looking for earlier torque and more of a smoother powerband. I'm nt expecting huge numbers at 2.5k rpms with a centrifugal charger. I want to maxamize the powerband in my rather short rshared_pm range.

The m90 is very common on the ka and will produce 200-250 torque at 3k rpms at 10psi on pump gas. That's awesome torque at 3k rpms for a inline four. However, I don't think the m90 has a lot of power left. I could be wrong but I dot know what people push these to.

Any thoughts?

 

The Eaton superchargers are torquey at low RPMs because they are of the positive displacement design, with optimum efficiency coming in at comparitively lower engine speeds than a centrifugal charger.

Obviously, any supercharger or turbo should be sized to the particular engine, the intended use, the intended RPM range, the vehicle particulars and so on.
Without taking all of that into account and giving it the consideration it deserves, the results will almost always suffer in some way.

You havent really said what you are trying to accomplish here. A properly sized and designed turbo system can provide plenty of torque, horsepower and a wide powerband. Ditto for a centrifugal supercharger. And for a positive displacement one. And for nitrous. All of them have tradeoffs and compromise.

We could literally spend weeks going into all of that. Its much easier if you narrow down exactly what you need and expect from a system. If, to do that, you need some good formulas and info for consideration, Corky Bell's book Maximum Boost is a pretty good start. Amazon might have a few copies for sale.

 

With a small displacement motor you cant have the best all around and look for big #'s. Either you get something smaller that will spool on the bottom end and the lack on top, or go big and have to spray it to get it to come in down low.