13 replies to this topic

[dcostello]

I have put a few feelers out here “to buy” an adjustable cam gear with no response. So a couple of questions for the all knowing around here. Is there anybody still making these for the 84-87 Si’s? If so, who? AEM says they do not have any. Unorthodox says they do not have any. Who here has the “connection for the stuff man”?

http://cgi.ebay.com/...1QQcmdZViewItem

I just came across this one on ebay but it seems less expensive and it is made out of AL7075 -T6 billet aluminum which I have never seen before (only 6061-T6 billet aluminum). Any thoughts here would be greatly appreciated.

Thank you,

Dan, the man with the plan who has the golden an. I should take the golden an to the tan van where I will meet Stan. Yes that is the plan!

Edited by dcostello, 30 January 2007 - 05:27 PM.

[Omega Mugen]

I run a five bolt AEM model for 84-87 CRX, which happens to be the same part number, 23-803, as some mid-90s 4 banger Accords, the 4 banger Odyssy van, and the D16a1 Integras. I've had no problems with it. There seems to be word out there that the AEM gear is off a tooth in terms of timing. That may be why AEM is shying away from saying that the gear is good for 84-87 CRX now, but not totally sure on that. I haven't chowed any valves to date.

[Madkore]

3 Bolts - NO, NO, NO!

5 Bolts - Yes

Bad things happen when the bolts slip and the cam gear rotates.

New valves anyone?

[89teg_mike]

I run a five bolt AEM model for 84-87 CRX, which happens to be the same part number, 23-803, as some mid-90s 4 banger Accords, the 4 banger Odyssy van, and the D16a1 Integras. I've had no problems with it. There seems to be word out there that the AEM gear is off a tooth in terms of timing. That may be why AEM is shying away from saying that the gear is good for 84-87 CRX now, but not totally sure on that. I haven't chowed any valves to date.

So the D16A1 can use the cam gears of the above cars (90s accords, odessys etc)??

I have a g1 teg and would be intrested in getting these gears (if I find a local pair for the right price)...

thanks
mike

[Omega Mugen]

So the D16A1 can use the cam gears of the above cars (90s accords, odessys etc)??

I have a g1 teg and would be intrested in getting these gears (if I find a local pair for the right price)...

thanks
mike

The 23-803. Yep, the same as I use on the EW.

[Omega Mugen]

Oh yeah and the timing belt hangs over the edge a couple of millimeters. It doesn't seem to make a crap of difference. Maybe a washer will cure this.

[dcostello]

Well, I found the accord one on ebay for $117.00 and free shipping. Anyone know of another place or cam gear that may be as good but less expensive?

Thank you again for all the reply's, keep them comming!

Edited by dcostello, 31 January 2007 - 11:35 AM.

[88g1TegSE]

Try JG Engine Dynamics. You'll want to call them. Their sight isn't always up to date or specific on details. One page indicates they don't sell them and another says they do sell D series adjustable cam gears for $80 each. I know they make them specific for the ZC but not positive about D16a1. I've heard their B16 cam gears will work on a D16a1. I'd call to see for sure.

http://jgenginedynam...m/Camgears.html

[87MugenProCR-X]

From my experience B series cam gears will not work on a D16a1 they will work on a ZC.

Julian

[lxndr]

OK, here are the facts...



Prelude F22 and Accord F22/F23 gears will work on any '84-'87 Civic/CRX EW/D15, and any '86-'89 Integra D16A1/ZC.

The F22 gear is a 40 tooth gear. The AEM part number is 23-803 for the EW/D15, D16A1 and F22/F23. The AEM D16A1 and EW/D15 cam gear is really an F22 gear and will need to be re-marked when used on a D16A1/ZC. There at least 4 manufacturers producing F22 cam gears, you will need 2 gears for a D16A1/ZC.

When using ZC cams with any aftermarket cam gears, use the dowel pins to align the cams at TDC then mark the gears with a dot of paint. The timing belt will hang off the end of the F22 gears by about 1/16". The 1/16" overhang will not be an issue and will not rub since the crankshaft gear keeps the timing belt aligned. Always lay your old gear over the top of the new gear to double check the timing marks, diameter and tooth count!

F22 gears will not work on any 88+ CRX DOHC ZC (what most people are referring to when they say "ZC") since these motors use a 34 tooth cam gear and 17 tooth crankshaft gear like the B-series motors. The JG Engine Dynamics "ZC" and D-series cam gears are 32 tooth gears and only fit the 88+ Honda motors, but Skunk2 and Megan Racing offer a similar 6 bolt design for the F22.

Edited by lxndr, 01 February 2007 - 03:38 AM.

[crxbruddah]

Great info! I'll be saving this! Thx lxndr!

[cbstdscott]

Now, before you get all excited about your new cam gear.... what do you expect it to do for you and your engine? No, it won't do that.

On DOHC engine, dicking with cam timing can give you a bit more perfromance by changing over lap between intake and exhaust valves. On a SOHC engine like the EWs, all you can do is change the point of peak hp/torque up or down the rpm range. There is no relative gain to be had.

The only real reason to have an adjustable cam gear on the EW is to compensate from changes in head height that comes from shaving the head. In other words, save your money for a head job (power is made in the head) and get the adjustable cam gear then.

Scott

BTW- I have the three bolt AEM cam gear and have had no problems for 7+ years.

[crxbruddah]

The only real reason to have an adjustable cam gear on the EW is to compensate from changes in head height that comes from shaving the head. In other words, save your money for a head job (power is made in the head) and get the adjustable cam gear then.

Scott

BTW- I have the three bolt AEM cam gear and have had no problems for 7+ years.

Thats exactly what I'd need it for...I know a few others that use the 3 bolt AEMs also...and they haven't had problems either.

Les

[dcostello]

Thank you for all of the input, lxndr… that was the best information so far. Just to let everyone know I am basically trying to take a CSP CRX engine to the limit by decking the block and head which is the main reason for this part and question. Also with the little lightness I hope to gain that 1 hp because I need all the help I can get against the Miatta’s.

Thank you all again,

Edited by dcostello, 02 February 2007 - 01:36 PM.