supercharged H22

[Smokinspeeds]

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You are running OEM rotational assembly right? I'd probably be wrapping my head around the idea of something forged in the near future.
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Nice build op!

+1, don't want to have your motor explode on you...

[cincy90h22]

On my street tune with no Hood intake air temp peaked at 91 degrees. With my previous calculations compressor speed should be 42000, Max speed for the charger is 51000 I believe. Once we get it tuned and I see boost levels, I will prolly look into the compressor maps and compresser speeds more to better 'tune' the charger and put it in its peak range. Still at this point I'm not sure what to expect since its never been done before.

[toycar]

Yea that's what he's saying.. I agree totally, the drag or loss, prolly increases with rpm or boost.

Once the pipes build pressure the compressor has to work harder to maintain positive pressure, so yes you are correct.



Im curious what kind of speeds you have to spin that compressor to see the CFM numbers you are talking about previously in this thread.

If that thing pushes twice the air as a 16g turbo, you should be able to produce some numbers that will cause your h22 to explode if your not careful.

You are running OEM rotational assembly right? I'd probably be wrapping my head around the idea of something forged in the near future.


What kind of charge temps are you running into?

Nice build op!

[cincy90h22]

So true. With out the compressor actually compressing the air going INTO the engine then you cant accurately state just how much the supercharger is taking for the "power" of the engine.

This is what you are saying right?

Yea that's what he's saying.. I agree totally, the drag or loss, prolly increases with rpm or boost.

[8ball]

I'm gonna give you a simple parrallel to tell you why you thinking parasitic loss is almost nil is no good with it not pushing boost. I have a hand crank flashlight, when the bulb is unscrewed it takes no force to spin easily, when it is on there is instantly much more drag. with boost your fighting compressing the air into the motor, the compressor side is not going to be spinning so freely and in turn it will be pulling more off the motor.

So true. With out the compressor actually compressing the air going INTO the engine then you cant accurately state just how much the supercharger is taking for the "power" of the engine.

This is what you are saying right?

[Smokinspeeds]

I'm gonna give you a simple parrallel to tell you why you thinking parasitic loss is almost nil is no good with it not pushing boost. I have a hand crank flashlight, when the bulb is unscrewed it takes no force to spin easily, when it is on there is instantly much more drag. with boost your fighting compressing the air into the motor, the compressor side is not going to be spinning so freely and in turn it will be pulling more off the motor.

[cincy90h22]

I don't really have any evidence of the loss either. I'm sure it exsists, but in my searches I've never seen any comparisons, before the charger; after the charger (no boost, just belt) you know what I mean. I'm not about to test it either, but ill sacrifice some to make some if anyone were to find actual dyno sheets somewhere showing the actual loss I'd be curious to see them. Mite be hard to prove though, I would imagine the higher rpm, harder the charger works, draw may increase. ?

[Dani Filth]

not just the parasitic loss but the restriction. that supercharger is compressing the charge when its spinning fast enough but until then its just in the way
those numbers were just an example. i have no idea really

[cincy90h22]

in a PERFECTworld 10 HP per psi

Fixed.

Remember too psi to horsepower also depends on cfm.. a 16g produces about 500 cfm, my vortech is more than double that at 1150 cfm.. LOL.

Dani Filth- I doubt it will take 25 HP to spin the charger, driving the car with the charge pipe unhooked it feels no different than before. I'm sure there is a little parasitic loss, probably similar to having power steering and AC again.

[F20A CB7]

I have a predator hood. Its vented I like it. It has 3 vents total.

[Dani Filth]

lovin that color!

10hp per psi is the rule of thumb but remember that the supercharger is a restriction itself. if you make 195 all motor the supercharger being in the way might drop that to like 170. youll need like 3psi to get back to the hp you were at. so a rough guess would say you could make like 250-260 on 10psi

your tuner is smart for not promising anything. especially since nobody has really done what your doing
the good thing is that even if you only pull out like 230whp youll still have a nice increase in torque

[cincy90h22]

I remember at first u said u wasn't lookin for a hp #, that 300 hp will be sweet... what does your tuner think as far as hp goes?

He isn't saying anything. LOL. He said "I don't make promises on numbers" besides, there are too many variables with this build. Its a guess as far as boost levels go now. In a perfect world about 10hp per psi. With boost levels not where I anticipated, I'm sure I wont hit 300 next week. But in the future, maybe, once we see exactly what we are dealing with then we can go about making accurate adjustments.

Thanks for looking, Dirty pic for the hell of it...

[8ball]

im not gonna lie thats some cool shit...

[F20A CB7]

I remember at first u said u wasn't lookin for a hp #, that 300 hp will be sweet... what does your tuner think as far as hp goes?

[cincy90h22]

Yea I felt it, felt great. But it was short lived, due to traffic, speed limit or air/fuel issues. All will be well soon revs quicker too