hi fellas.

hope this is OK, rj; i got no good responses trying it on the for sale area;

looking to buy a good camshaft for a 1500 DX; my mechanic needs one and i'm trying to help him out (as he's helped me out ALOT last year). i know lots of you guys have either pulled out motors recently or are going to refurb yours for the coming season; if you have a good camshaft please email me.

thanx and happy new year!

todd
d15b7@aol.com

 

Are the heads the same on the 1600 and the 1500? If so, I have one here. Also have oil pans, intake manifolds, front suspensions, rear suspensions and can cover most of your Honda Civic/CRX shopping needs Perfect for those late holiday gift ideas for dad. Great for that early Valentines day gift for the wife.

 

AFAIK the DX and Si camshafts are the same. They are listed together in the FSM.

 

I am now wondering if that is right. The distributors are not interchangable as far as I know. Are they keyed the same? (moments later) I just checked Majestic and they are different part numbers (looked up 89 CRX Si/DX camshaft - strange the DX is 70 dollars more). Sorry Todd, looks like I spoke too soon.

 

It is possible that they are keyed differently but the specs are the same.

I've never compared them side by side though.

 

The distributors will interchange but the Si and DX cams are not the same. The Si is the "hotter" cam. I've did some research on this a while ago when doing the MPFI conversion on my D15. While the whole MPFI bolts right on including the distributor, if you use a D16 cam on a D15, the cam ends up being something like 8 degrees off, needing an adjustable cam gear to compensate. Probably has to do with the slightly different deck height and possibly head differences. Do a search on dseries.org, this has been covered on there quite a bit...

 

Being 8 degrees off is likely due to being keyed differently. Maybe due to differences in deck between the D15 and D16.

But the Si cam is not "hotter," at least not according to the FSM. Lift and duration specs for both the DX and Si cams are exactly the same. I'm looking at it right now in vivid black and white.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jsi &raquo;</TD></TR><TR><TD CLASS="quote">The distributors will interchange but the Si and DX cams are not the same.
</TD></TR></TABLE>

Not sure how. I had a non-Si distributor last year, new out of the box and there was no way it would attach to the Si head. Although NAPA, AutoZone, etc ... all list them as interchangable, they were definately not (notable as the Si dist. was near 100 dollars more).

(Si) TD02U vs. (non-Si) TD01U/TC05A

 

Distributors are definitely different as one is a two injector setup (dx) and the other a 4 (si). No way you're gonna interchange those AFAIK.

As well, I had thought the valvesprings and camshaft were indeed different part numbers between the two trimlines.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Todd00 &raquo;</TD></TR><TR><TD CLASS="quote">Distributors are definitely different as one is a two injector setup (dx) and the other a 4 (si). No way you're gonna interchange those AFAIK.

As well, I had thought the valvesprings and camshaft were indeed different part numbers between the two trimlines.</TD></TR></TABLE>

same here with them being different. I have read many times that the a6 cam is in fact "hotter"

 

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

same here with them being different. I have read many times that the a6 cam is in fact "hotter"</TD></TR></TABLE>

From my 1991 FSM...

Cam lobe height:
Intake
5 Speed Manual / Auto - 36.603
Exhaust
5 Speed Manual - 36.747

It lists the cam specs based on transmissions, NOT engine code or vehicle trim level. Therefore, I would assume that all 5 speed cars have the same cam specs.

Now, there might be a hotter cam from a different YEAR. I dunno, all I have is the 1991 FSM.

 

I have a DX camshaft and a DX head if interested, email me.

chris

 

An Si distributor will bolt to the d15 head. I have one in mine. You have to use the rest of the MPFI stuff including the ECU. Common swap on these engines and is a nice low budget mod that really wakes the engine up (my tired ol 170k mile B15 dynoed at 90whp with no other mods, bone stock). As far as cams go, i never found a definitive answer as to whether or not they are different. One thing is for sure it seems is that an A6 cam in a B2 will be about 1/2 tooth off (i think it's more like 5 degrees off not 8). Also, lobe height alone doesnt tell the whole picture since two cams with same lobe height can have different durations, overlap, ramp angle and even different effective lift if the rockers are of different ratio...

Ah well, as it turns out I did the whole MPFI swap for nothing since a 44mm Mikuni carb'd ZC is going in there as I'm writing this...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Catch 22 &raquo;</TD></TR><TR><TD CLASS="quote">

From my 1991 FSM...

Cam lobe height:
Intake
5 Speed Manual / Auto - 36.603
Exhaust
5 Speed Manual - 36.747

It lists the cam specs based on transmissions, NOT engine code or vehicle trim level. Therefore, I would assume that all 5 speed cars have the same cam specs.

Now, there might be a hotter cam from a different YEAR. I dunno, all I have is the 1991 FSM.</TD></TR></TABLE>

Once again, Uncle Catch is correct on this, they are seperated by the tranny. However, different camshafts did come in the base model (listed as Std. in FSM)(4 speed manual) and the Dx/Si (5 speed manual). Be sure that you are not confusing a Dx camshaft with a Standard.

Todd, I will have a good OEM Standard camshaft after I finish my upgrade to a Dx. You are more than welcome to it if you like. A good way to know if it is the Standard or the Dx is by the engine code. D15B1 is a standard, while the D15B2 is the Dx. Hope this helps!

Sam

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jsi &raquo;</TD></TR><TR><TD CLASS="quote">Also, lobe height alone doesnt tell the whole picture since two cams with same lobe height can have different durations, overlap, ramp angle and even different effective lift if the rockers are of different ratio...
</TD></TR></TABLE>

I realize this, but these specs aren't listed anywhere that I can find in the FSM.
I figured that since there are no different specs listed, that the cams must be the same. A reasonable assumption, but it could be completely wrong.

And just because the timing goes off 5 to 8 degrees doesn't really mean the cams are different. It could be a variety of issues relating to the distributor or the head. Decking the block/head on my race car dramatically changed the timing. About 5 to 8 degrees as a matter of fact.

So the Si could conceivably have the exact same cam as the DX, just a different deck and distributor.
I dunno. I can't find the info actually listed anywhere, so I'm just speculating.

 

Right. Agreed. I never found definitive specs on the D15 cam either so i'm speculating also. And like you said, the timing being off is probably more a result of the D15's shorter deck.