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Old 02-26-2008, 09:57 PM   #1
Jerry Xu
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Join Date: May 2003
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07 2.5i
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Default Does any 2.5i owners have both the light weight pulley and flywheel?

I have read that this combo can potentially cause CEL's due to the engine shaft rev down to fast. First of, I don't know if it is true. Then, on the DBW 2.5i's, the rpm drops down slowly after you lift your foot, so slowly it actually bathers some owners. So does this slowness mean that the light weight combo won't be as problematic on the late model cars?

I only have the LWCP. It feels great. Do any of you have both. If you do, could you share some 1st hand experience please.

Jerry
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Old 02-26-2008, 10:50 PM   #2
LTracer
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I read somewhere (2.5RS I think) that you increase your likelihood of throwing the time belt as the rotational mass of the engine has been significantly reduced. Not sure if there's any truth to that. You'll definitely have to re-learn how to drive your car, letting out the clutch with such a light rotational engine mass can make seamless starts a bit of a chore.
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Old 02-26-2008, 11:19 PM   #3
DLC
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I have a lightweight Exedy flywheel and a Cobb lightweight pulley. Didn't get a CEL after I had them installed.

No timing belt issues either.

Exhaust, however, was another story.
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Old 02-26-2008, 11:28 PM   #4
rougeben83
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It's nothing mechanical, it's one of the stupid sensors (I think cps) that goes haywire on some cars if the revs go up or down too quickly; it THINKS there's something wrong on the crankshaft.

It's not 100% either, some cars get it, some cars (like DLC's) don't. Some cars even throws CEL's if you put a lw pulley or lw flywheel too. Just be prepared with the consequences if it does happen.

<--- just has the lw flywheel, no CELs. Brought the car to life IMO.
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Old 02-26-2008, 11:28 PM   #5
novacivic
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as long as you dont get an extremely light flywheel you will be ok. and the cel is at idle there is not enough rotating mass and it causes the ecm to think it is missfiring but isn't really because there is a fluctuation in the revolutions.
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Old 02-27-2008, 06:20 PM   #6
atech_rallyrs
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ive got lightweight pully and a lightweight flywheel. no cel at any time, no problems with exhaust. car revs rather quickly.
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Old 02-27-2008, 06:23 PM   #7
Jerry Xu
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Quote:
Originally Posted by atech_rallyrs View Post
ive got lightweight pully and a lightweight flywheel. no cel at any time, no problems with exhaust. car revs rather quickly.
Is it on your NA car? How much does the flywheel weight? Does it idle to low?
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Old 02-28-2008, 01:20 AM   #8
ericb269
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i had no problems with this
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Old 02-28-2008, 10:59 AM   #9
Jerry Xu
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Quote:
Originally Posted by ericb269 View Post
i had no problems with this
I appreciate your input. Looks like you probably have an 06 or 07 2.5i? If so you're the 1st one that has the combo on a late model car.
Please let me know which FW you have (and yes, its weight). Please also comment on the driving experience with the combo.
Thanks
Jerry
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