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Forced Induction Forum Sponsored by Active Autowerke
Discuss supercharging, turbocharging and even nitrous and water injection here.
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Old 09-19-2006, 07:56 PM   #1
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Cool Supercharging my '05 325 ci Stetronic??

Guys,


As you read, i have an 05 325 ci and i am sewrisouly thinkin gof using my hard earned $$$$ on buying a SC. Realistically seaing is this a good investment on this car model or a waste of time?? If it is worth it could you guys give me any suggestions. I am looking at spending under $5k.
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Old 09-19-2006, 08:21 PM   #2
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learn how to spell first.......jk, haha but if you have a step trany you will have to run really low boost to keep the tranny from going kaput
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Old 09-19-2006, 08:23 PM   #3
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why didnt u get at least 330 ? i think its not worth it for 325
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Old 09-19-2006, 08:23 PM   #4
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go for it if you have the money !!! If it's not M56 motor, DO IT get ESS stg. 1 for steptronics. It has 6.5 psi boost (safe for stock internals)
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why didnt u get at least 330 ? i think its not worth it for 325
I think it's worth it...it'll bump it up to around 330's stock (if not more?), which isn't all to bad.
Quote:
Why does everyone always say this? If this were true, would BMW put the step tranny in the new 335 with 300ft-lbs of torque? Doubt it.
it IS true...the 335i is a different story...has different type of step I believe...anyway, the E46 type of step cannot handle that much power...u'll blow it =D
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Old 09-19-2006, 08:31 PM   #5
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I think it's worth it...it'll bump it up to around 330's stock (if not more?), which isn't all to bad.
It will get you past 225bhp if you supercharge a 325...more like 280 at 6.5psi...and the AA SC at 8psi (many on here have run this with a step for years) will bring it up to 310bhp.
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Old 09-20-2006, 07:31 AM   #6
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It will get you past 225bhp if you supercharge a 325...more like 280 at 6.5psi...and the AA SC at 8psi (many on here have run this with a step for years) will bring it up to 310bhp.

I am running 8 psi on a step with no tranny issues at all. However, SC's do require more care and feeding. Little "issues" seem to pop up here and there which may not have if you left all well and good. For me the gains outweigh these small annoyances.
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Old 09-19-2006, 08:24 PM   #7
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learn how to spell first.......jk, haha but if you have a step trany you will have to run really low boost to keep the tranny from going kaput
Why does everyone always say this? If this were true, would BMW put the step tranny in the new 335 with 300ft-lbs of torque? Doubt it.
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Old 09-19-2006, 09:35 PM   #8
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Why does everyone always say this? If this were true, would BMW put the step tranny in the new 335 with 300ft-lbs of torque? Doubt it.
Because there are a few members here who tried pushing alot of power with their Step trannies and busted them. 335s have new transmissions that can handle the power, and also shift much faster than the ones they use for the e46. There's talk amongst the e90/e92 crowd about chipping the turbos to 400HP, but no has determined if the new tranny can handle that much.
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Old 09-19-2006, 09:40 PM   #9
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Because there are a few members here who tried pushing alot of power with their Step trannies and busted them. 335s have new transmissions that can handle the power, and also shift much faster than the ones they use for the e46. There's talk amongst the e90/e92 crowd about chipping the turbos to 400HP, but no has determined if the new tranny can handle that much.

I see, I see.
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Old 09-21-2006, 11:56 AM   #10
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Why does everyone always say this? If this were true, would BMW put the step tranny in the new 335 with 300ft-lbs of torque? Doubt it.
I'm curious to know if BMW is using a getrag or zf tanny in the new 335, that could make a nice difference...
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Old 09-21-2006, 12:14 PM   #11
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I'm curious to know if BMW is using a getrag or zf tanny in the new 335, that could make a nice difference...
I'm pretty sure they probably changed it up to something stronger
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Old 09-19-2006, 08:29 PM   #12
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would the supercharge affect the cars fuel economy?
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Old 09-19-2006, 08:35 PM   #13
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would the supercharge affect the cars fuel economy?
ur joking me right?
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Old 09-19-2006, 08:37 PM   #14
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would the supercharge affect the cars fuel economy?
lol...yes...it will affect fuel economy quite a bit. It will go DOWN TOWN! but it sure would turn your frown upside down
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Old 09-19-2006, 08:57 PM   #15
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alright i gotta a ? i have a 330Ci coupe step tranny and also have like intake, full exhaust, headers should i run a s/c on mine, like 8 psi is fine rite? or is this dangerous for my tranny
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Old 09-19-2006, 09:18 PM   #16
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alright i gotta a ? i have a 330Ci coupe step tranny and also have like intake, full exhaust, headers should i run a s/c on mine, like 8 psi is fine rite? or is this dangerous for my tranny
well i've read that the 325 w/ supercharger is right on the limit for the step tranny's limits, so i think the 330 would be a little too much for the tranny to handle
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Old 09-20-2006, 01:25 AM   #17
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I have a step 325i as well. I was thinking to supercharge it, but it is NOT worth it.

Let me tell you my reason.
You supercharge a step 325i, you can get low 6 second 0-60 time with a voided warranty. You spend about 6-7 grands.
For the same money, upgrade your 325 to manual 330 ZHP. You still get low 6second 0-60 time AND you still have a full warranty.

I would say upgrade your car to manual 330 ZHP
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Old 09-20-2006, 07:32 AM   #18
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I have a step 325i as well. I was thinking to supercharge it, but it is NOT worth it.

Let me tell you my reason.
You supercharge a step 325i, you can get low 6 second 0-60 time with a voided warranty. You spend about 6-7 grands.
For the same money, upgrade your 325 to manual 330 ZHP. You still get low 6second 0-60 time AND you still have a full warranty.

I would say upgrade your car to manual 330 ZHP
is it possible to change the step geabox with a manual ?i have a 330ci step.if it is possible i will do it?
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Old 09-20-2006, 10:45 AM   #19
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Quote:
Originally Posted by interisti View Post
I have a step 325i as well. I was thinking to supercharge it, but it is NOT worth it.

Let me tell you my reason.
You supercharge a step 325i, you can get low 6 second 0-60 time with a voided warranty. You spend about 6-7 grands.
For the same money, upgrade your 325 to manual 330 ZHP. You still get low 6second 0-60 time AND you still have a full warranty.

I would say upgrade your car to manual 330 ZHP
ummmm...how exactly would one upgrade from 325 to 330 with $6-7K??? even if I were to have traded-in my car say 10 seconds after I left the lot on the day I took delivery, they would knock down the re-buy price of my car to like...$30K...which means I already lost about $6-7K (don't quote me on this, I'm juss trying to prove a point in that you already lose money off of trade-in)...basically, what I mean is that for people that already currently have a car, I don't think upgrading to 330 is very likely <=[ ...or maybe it's just me? I'm poor as fock T_T
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is it possible to change the step geabox with a manual ?i have a 330ci step.if it is possible i will do it?
yeah, it's possible...I've read on older threads of it being done, but from what I remember, it requires a lot of time, work (labor), and money I for one LOVE clutchless manual...and if I had money, I'd try to upgrade to SSG or SMG
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Old 09-19-2006, 09:40 PM   #20
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alright i gotta a ? i have a 330Ci coupe step tranny and also have like intake, full exhaust, headers should i run a s/c on mine, like 8 psi is fine rite? or is this dangerous for my tranny
The guys who busted their trannies tried pushing too much power through. If I recall correctly, they were running 6.5psi AND cams and/or headers. Your intake will get replaced by the S/C unit, and you could probably keep the headers, but you'd have to turn down the boost on the S/C. Up to about 310HP, the e46 automatic tranny has had no problems. Going beyond that, is where things get iffy.
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