wondering what the best option for crankshaft pulleys are within the rules of ITA. since youre stuck with using the same material, then i suppose taking the lightest pulley and shaving any accessory pulley off is the best option, but which one, a DX or HF? does it depend on year? i'd like to know for sure if anyone knows.

ive also heard the quick option is just to burn out the harmonic damper on the Si.

 

It all depends on which diameter crank snout you have. Some early 88 CRX Si's are smaller diameter and a come with roughly the same non dampened pulley as the DX. If you have the more common larger diameter snout of the later cranks then a JDM pulley with the additional power steering pulley can be machined down to the same dimension as the earlier non dampened units. Either pulley can be machined down to have only the single alternater pulley.

 

so the 88's have a different snout diameter on the crankshaft?

interesting.

i just looked up the numbers on majestic, theres some options for each model and year, but some not shared for an 88. the part number goes 833XX, last two digits shown.
------88--------90
HF--53/54-----54
DX----50----51/55
Si-50/52/56--52/56

looks like the 53 and 50 are unique to 88, but 53 is unique only tot he 88 HF. weird.... anyone know if the 88HF is something special?

then again, if you were to use an 88 pulley, then youd have to mate it with an 88 crankshaft huh....



Modified by Tyson at 11:15 AM 12/16/2004

 

There is always something special about first year production Hondas. Especially specialized vehicles like the HF. The car was built for one reason only, to have the highest CAFE.
Ask Bernardo for what pulley to use.

 

funny you mention him, i already had this conversation with him. looking for other peoples input.

 

Are you sure about having to have the same material for the pulley. I have the jan. 2005 issue of FastTrack in front of me and in Section 17.1.4.D.1.n. they have taken out the sentence that states "Diameter and material of crankshaft pulleys shall remain stock" So with the new rules you should be allowed to run alunimum.

*** Also loving the fact that We can now run 15" wheels on all ITA cars !!!! ****

 

ah... i didnt think that rule passed.... so the conversation thus far is all moot.

just run an AEM or unorthodox then?

 

Here is the pulley from that quirkey '88 that you guys were talking about.







It fits on a 1990 crank though...so maybe this is a DX pulley....


Modified by jisu009 at 8:07 PM 12/16/2004

 

for what it's worth, I have two 88 motors that have both had odd looking crank pulleys with lots of holes in them, different pulley than the 89-91 motors I have

 

thanks for the pics. good to know. was the pulley opening bigger or smaller?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tyson &raquo;</TD></TR><TR><TD CLASS="quote">thanks for the pics. good to know. was the pulley opening bigger or smaller?</TD></TR></TABLE>

Smaller

 

Im sure you can have your local machine shop bore the hole so it fits.


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jisu009 &raquo;</TD></TR><TR><TD CLASS="quote">Here is the pulley from that quirkey '88 that you guys were talking about.







I just tried to fit it on a '90 crank I have in the garage....it didn't fit.</TD></TR></TABLE>

 

I just measured it with calipers and it actually will fit.

Wierd. I know the crank is out of a 1990. The pulley is off my roommates ITA prepped '88 engine....I cannot verify that the pulley is in fact an '88 though.

Maybe it is a DX pulley? Anyone know what one of those looks like?

 

now youre confusing me.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tyson &raquo;</TD></TR><TR><TD CLASS="quote">
just run an AEM or unorthodox then?
</TD></TR></TABLE>

I have the Unorthodox crank and alternator pulleys on the race engine that has never run...for what input value that is.

Mine is also the wildcard early '88 small snout crank so I had to send back my first crank pulley to get the smaller one. The smaller one is actually the same one used on the '87 and older cars which uses a narrower belt with one less rib in it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRX Lee &raquo;</TD></TR><TR><TD CLASS="quote">
The smaller one is actually the same one used on the '87 and older cars which uses a narrower belt with one less rib in it.</TD></TR></TABLE>

so youre saying the older pulleys also require a different alternator belt? that doesnt make sense because the alternators are interchangeable between 88-91.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tyson &raquo;</TD></TR><TR><TD CLASS="quote">so youre saying the older pulleys also require a different alternator belt? that doesnt make sense because the alternators are interchangeable between 88-91.</TD></TR></TABLE>

The OEM pulley for the '88 runs the same belt as the '89s and later but because the '88 pulley is so uncommon then Unorthodox does not make a pulley for the '88 alone. If you want to use an Unorthodox underdrive, light pulley on that crank, you must use the '87 pulley which has the narrower belt. I have the wider alternator pulley and just plan to leave one rib open ith the narrower belt.

The moral of the story is that when you build your engine, check the OD of the crank snout and make sure that you have the later, larger one or plan to be stuck with the stock heavy pulley.

On Labor Day weekend 2003, I did the nice brotherly thing of building an engien for my younger sister's '90 Civic LX sedan. Since she lived a long way away, I got a junkyard engien and built the whole thing the week before then she drove down from New York (with knocking rod) and I swapped the fresh engine into her car over the three day weekend and she drove home. All was well until i was buttoning the car up the last night and found that her old crank pulley with power steering drive was way too big. I had to reuse the small ID crank pulley that came with the junkyard engine and my sister had to drive the car for the next year and a half with a non power boosted power steering system as the small ID '88 power steering pulleys are extremely rare. Needless to say even though I built and paid for the engine, she was not too thrilled with me. I have plenty of first hand experience being burned by the small snout '88 cranks.

 

ah, that makes sense now. thanks for clarifying that.

 

Tyson, Just find a pulley that will fit your crank that has no rubber mounted damper on it. These pulleys then can be cut down on a lathe to have only a grooved section to accomodate an alternater belt only. not to mention the additional brake duct clearance that will be freed up. If you want to go lighter than this, you wil have to use a non Honda part.

 

just wondering if removal of the rubber damper will affect the life of the engine? will bearing wear be accelerated? the shop that built my H1 spec LS advised me to keep the stock crank pulley for this reason....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Todd Reid &raquo;</TD></TR><TR><TD CLASS="quote">just wondering if removal of the rubber damper will affect the life of the engine? will bearing wear be accelerated? the shop that built my H1 spec LS advised me to keep the stock crank pulley for this reason....
</TD></TR></TABLE>

The D16A6s (or at least all of the ones that I own and have owned) don't have the rubber damper, they just have the steel with the alternator and A/C belt locations. I had thought of turning off the A/C part but the much lighter aluminum aftermarket pulleys are way lighter and don't require turning.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Todd Reid &raquo;</TD></TR><TR><TD CLASS="quote">just wondering if removal of the rubber damper will affect the life of the engine? will bearing wear be accelerated? the shop that built my H1 spec LS advised me to keep the stock crank pulley for this reason....

</TD></TR></TABLE>

The oil pump is the damper on the 88-91 motor, not the pulley. There is not elastomer at all in the 88-91 pulley.

 

I used one of these on my '90 Civic Si. Super light.

From:
http://www.proautosportsinc.com/

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Steve91 &raquo;</TD></TR><TR><TD CLASS="quote">

The oil pump is the damper on the 88-91 motor, not the pulley. There is not elastomer at all in the 88-91 pulley. </TD></TR></TABLE>

actually, the later ones DO have a separate metal disc bonded by rubber to the inside face of the pulley.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tyson &raquo;</TD></TR><TR><TD CLASS="quote">actually, the later ones DO have a separate metal disc bonded by rubber to the inside face of the pulley.</TD></TR></TABLE>

I have not ever seen a CRX pulley that had the rubber but did stumble across the pulley from the power steering car of my sister's mentioned above and it does have the rubber in it. That car was a '90 or '91 LX sedan I think but I did't really care enough about it to remember the specifics.

If anyone would want that pulley for free plus the cost of the shipping, let me know or otherwise I will toss it in the garbage. It has the alternator, A/C and PS belt drives on it and fits the '89 and up crank snout.