xviper

The 4.44's are vertually extinct in the world. The 4.57's you can get from Rick's Accessories. The 4.44's were originally from a company called J's. I don't know for a fact they came out of a Kia. I was told the J's was stronger than stock gears and I have these in my car now. So far, they have held up well with S/C use. The 4.57's don't come from any existing car. They are custom made by Richmond Gear for Rick's. They too, are supposedly stronger than stock. However, whether or not they'll handle the kind of power you are talking about is unknown.

buzilanga

Well only way to find out is ask rick or try them myself out.
Do you think if I cryo them they will hold more power? And how about the diff itself, does that hold a lot of power or its just the ring and pinion? I know this aint the topic but we are in the diff topic so i'll ask another question. How about the comptech reinforcement diff holder? do I really need one of those or I can cryo my stock ones?
Thx

xviper

Cryo treatment certainly can't hurt but as to how much more power it will hold, it's anyone's guess.
There have been 2 reported cases here where the diff case (where the pinion gear goes through) has cracked under stress and strain.
As for the Comptech re-inforced parts, again, that's a matter of personal opinion and choice. That too, wouldn't hurt. The Comptech parts are not just cryoed. They are made of stronger stuff to begin with.
If you are going to the trouble of getting Rick's 4.57's, you may as well get the re-inforced parts too.

buzilanga

Yeah, will do that too. About the hole where the pinion crack. Will like uhmm, welding some steel around, lets see the "weakpoints" that will kinda help a little in my opinion.

swtazn97

Currently I have SC with no gears and no diff installed. That's b/c I'm putting on 4.57 gears.

4.57 gears to help power down low, then S/C'er takes care of the rest. What more can you ask for?

buzilanga

Down low you mean at low rpm when the boost is down? To help bring it up faster right? Don't know much about sc. Never driven a car with one, only turbo.

xviper

The 2 existing S/C kits for this car does not come into useful boost till about 5000 rpm. "Gears" take care of the lack of grunt below this point.

buzilanga

So basicly i won't have full lets say 7 psi boost till about 5000rpm?

wortham

no, you won't have full boost til about 8800 rpm's. you can imagine your boost much like your hp line. as you revs get higher, so does the amount of boost you're creating. so, your MAX boost is 7 psi. it increases linearly as the rpm's increase.

xviper

When I say "useful" boost, I'm talking about the S/C putting out enough boost to help the engine compensate for the blower's parasitic drag on the motor. Up to about 3500 - 4000 rpm, the blower takes more power to spin than it is giving back.