I'm looking up underdrive pulley sets for my '91 Si. The Unorthodox Racing set offers a set that includes crank and alternator pulleys and a belt, single belt conversion. Which is just exactly what I need. However it says that it will not work on Civics sold in Canada.

My '91 Si has a vin and stamp that says it was manufactured in Canada. I'm assuming this means the Unorthodox Racing set will not work with my car? If so, what is the difference? Could it be converted to work?

If I cannot easily make it work, is there another set that offers just the crank and alternator pulley that I could purchase, like AEM or any others? I tried searching for AEM, which I believe they do make for this car, but I'm wondering if they may be manufacturer specific like Unorthodox.

Any input would be great.

Thanks.

 

Waste of money.
Your stock pulley has a rubber damper built into it.
The Unorthodox is just a solid piece and offers no protection.

Read up on harmonic balancer.

A stock Y8 pulley is larger than your stock and will overdrive your alternator... not such a bad thing.

 

Wouldn't consider this myself.
The stock pulley is designed and proven to allow the engine to go to 300/400/500k
Throw something like that on, you might as well dump sand into your oil fill cap

 

I guess I should have mentioned I already know about the potential risks and that I know it's an expensive mod for very little power return. But, this car is not a street car. I know the risks. I don't need lecturing, I just need some answers to my specific questions.

Thanks.

 

Canada had power steering. Probably why they don't offer it for those cars.

 

my stock pulley has no rubber shock damper for the ac going off or on.

if your car does not have power steering or you are doing without it and you have no ac than i do not see why the crank/alternator combo setup wont work.

 

A/C has been removed and I don't think the car had power steering. I know currently the crank pulley on the motor is for 2 belts(alt and a/c). I haven't looked to see if it has a damper on it but it does look like a stock pulley. One of the previous owners may have changed it for something else though. The car has been through a few hands and the motor has been rebuilt.

Thanks for the info

 

i say get the UO set. I ran the 13 oz crank pulley with 1 belt for alternator on an h22 in a civic for a few years without issues. the US market stock d16a6 crank pulley was a solid steel 2 belt unit. the exact one that is on my original a6.

 

The Alumn crank pulley is light enough that any imbalence wont have any effect.

 

I think "made in Canada" is different than "sold in Canada".

 

There are a few potential differences between USDM & CDM 88-91 Civics. One is as mentioned, is that power steering was more prevalent in CDM 88-91 Civics whereas P/S did not show up as a standard feature for US models until 92-95.

The other difference is the daytime running lights feature that was part of CDM models and necessitated a different alternator that USDM models. We are not 100% sure when daytime running lights first appeared in CDM Civics but we do know for sure that 92-95 Civics always had the feature.

If you are only running an alternator then the single belt crank pulley we offer works for all 1988-95 Civic/CRX/Del Sol models.

There are three different alternators used by Honda. The first two that were OE are both Nippondenso made but have different shaft diameters (15 & 17MM). The third is a Mitsubishi made alternator (17MM shaft) which we know for sure first appeared on CDM models in 1992-95 as part of the daytime running lights feature. Only the 1996-00 USDM Civic/Del Sol SOHC engines saw the Mitsubishi alternator. This alternator also became the superseding replacement for all previous alternators.

We offer alternator pulleys all three of the OE Honda alternators.

As for the damper issue it is a wild urban myth. We have now been offering our pulleys for 16 years now with over a trillion miles driven from simple under 100 HP Civics to 1700HP Supras with no adverse effects. Honda has used solid pulleys from day one all the way through Integra Type R models. Porsche uses a solid pulley on the GT3 models to no ill effect. Once our new site is fully operational there will be more FAQ and blog info that covers these fears at all levels.

Please feel free to contact us through our site at anytime if there are any additional questions

Respectfully,
UR

 

That was weak.
Seriously... how can you compare any other car to this? How does what Porsche uses on their cars have any relevance at all?

Design intent.
What and why the engineers and designers calculated and developed solid or dampened.
You can't argue against that.
However, you can argue the converse and discuss the adverse effects that are clear as day when you remove the rubber damper from an engine that WAS equipped with one.

"Hi - buy our stuff! We'll tell you about daytime running lamps that have nothing to do with our product and then we'll tell you about other makes of cars too! We'll leave out the important stuff though - you can be our guinea pig and we will keep our fingers crossed for you."

 

We will let our experience and reputation for uncompromised quality speak for itself. We've been at this for over 20 years. We've had access to engine development facilities of a few OE's to back up our facts about solid pulleys being safe. Ultimately an internal combustion engine is a pretty straight forward animal, there are some differences based on architect which influences harmonic signatures but ultimately it is the quality of the internal components that determines longevity. Considering we've spent much of the last 7 years developing, refining and getting our new Damper Technology (The Ultra Damper) patented we feel confident we know exactly what we are talking about. We will not be goated into online conflicts, so you can believe what you believe and we will respect that. Our Ultra Damper program is specifically designed for engines, the domestic V8, that are inherently in need of damping. More facts about the need for a damper will be available for reading in the near future on our site.

UR

 

http://www.icbmotorsport.com/jdmcityrcrpu.html

OEM - Made by Honda, FOR Honda engines. Obviously, you dont NEED a damper on the crank pulley. Yes, it's for b-series, but same difference.

 

You beat me to it, I have 2 pulleys sitting in my garage, and what do you know, they are solid metal. If there was rubber in it, it wouldn't ring when you hit it.

 

Thank you very much for all the useful information urinc, really appreciate it!

 

If the rubber band was actually for balance why are many pulleys drilled for balance? on the bigger engines, like f and h series the rubber band us on the compressor part of the pulley, due to the on and off nature of the compressor and the shock to the drive train by that cycle. Three rubber band dampens that shock


Posted from Honda-tech.com App for Android

 

Before getting thrown under the bus - I am specifically talking about replacing dampened pulleys with non-dampened.
Developing, designing, patenting are all meaningless.
Your 20 years against all the engineering teams at major car manufacturers? Really... tell me more please.

Whatever though... If you want to tell physics that resonance isn't real and spit in the face of the inventor of the dampened pulley then great! People will continue to buy your products and you don't see a problem with risking bearings and crankshafts - that's on you.

Please don't start making medical products.

 

My crx si has 263k miles on a solid steel pulley....


Posted from Honda-tech.com App for Android

 

Our blog is live again with all the details we described.

http://unorthodoxracing.blogspot.com

Respectfully,
UR