mini-me and cam timing - help

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Dec 22, 2003 | 10:26 AM

tgreaves

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From: Baltimore, maryland, usa

mini-me and cam timing - help

I remember hearing that you have to adjust your cam gear like 4.5 degrees either advanced or retarded when using a D16Z6 head on a D15B7 block.. What way do I adjust the cam gear and is the 4.5 degrees correct.. Thanks

Dec 22, 2003 | 10:01 PM

BauleyCivic

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From: Trackside with the smoking bee

Re: mini-me and cam timing - help (tgreaves)

i didnt adjust anything...set the cam gear and crank pulley to tdc...slide the z6 belt on...and its all good...i didnt touch the dizzy...no problems yet pulls fine 15.9 at the track

Dec 23, 2003 | 02:38 AM

Mista Bone

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From: Cincity, OH, USA

Re: mini-me and cam timing - help (tgreaves)

1/2 tooth for sure, 4.75 degrees

Dec 23, 2003 | 05:42 AM

tgreaves

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Re: mini-me and cam timing - help (Mista Bone)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mista Bone »</TD></TR><TR><TD CLASS="quote">1/2 tooth for sure, 4.75 degrees</TD></TR></TABLE>

Do I advance the cam 4.75 or retard it..

Dec 23, 2003 | 05:49 AM

tgreaves

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From: Baltimore, maryland, usa

Re: mini-me and cam timing - help (BauleyCivic)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BauleyCivic »</TD></TR><TR><TD CLASS="quote">i didnt adjust anything...set the cam gear and crank pulley to tdc...slide the z6 belt on...and its all good...i didnt touch the dizzy...no problems yet pulls fine 15.9 at the track

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

Am i the odd ball drag racer here.. I ran a 15.8 with my crx with a d15b7 dx non-vtec motor and a dx tranny.. I do have my intake port and polished and a gsr throttlebody on it.. I wonder what ill run with the vtec head on it..

Dec 23, 2003 | 08:34 AM

BauleyCivic

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From: Trackside with the smoking bee

Re: mini-me and cam timing - help (tgreaves)

Good stuff man

**** thats really good...my friend with a CRX Si I/E could only manage 16.0

Dec 23, 2003 | 10:56 AM

tgreaves

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From: Baltimore, maryland, usa

Re: mini-me and cam timing - help (BauleyCivic)

What was the temps when he raced it.. I pulled a 15.8 without nitrous and a 14.85 with a 55 shot.. It was about 55 degrees outside.. Ill post the movie of me running, I beat a guy with a turbo mr2.. He ran a 14.89 and he was pissed.. His car looked brand new and my crx is a multi color beater right now..

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Dec 23, 2003 | 11:21 AM

Mista Bone

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From: Cincity, OH, USA

Re: mini-me and cam timing - help (tgreaves)

how did you install the cam?

If you install the cam "advanced" then you retard the cam gear.
If you install the cam "retarded" then you advance the cam gear.

Dec 23, 2003 | 11:27 AM

tgreaves

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From: Baltimore, maryland, usa

Re: mini-me and cam timing - help (Mista Bone)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mista Bone »</TD></TR><TR><TD CLASS="quote">how did you install the cam?

If you install the cam "advanced" then you retard the cam gear.
If you install the cam "retarded" then you advance the cam gear.</TD></TR></TABLE>

Ok.. I see now I asked a dumb question.. If its 1/2 tooth off then you can go either way..

Dec 23, 2003 | 11:41 PM

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Mista Bone

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From: Cincity, OH, USA

Re: mini-me and cam timing - help (tgreaves)

the question would only be dumb, if you had to ask it again, and again, and again!

Now the SECRET since I started this mess 6 years ago.

Warm car up, adjust idle to 700 rpm and ignition timing to center mark.
Change cam using a adj. cam gear at zero. Adjust cold lash settings, start car.

Now reset the ignition timing @ 700 rpm, BUT use the cam gear instead of the dist. to change the timing setting.

Sounds simple now doesn't it?

The effects without a cam gear, I tried both settings........

Not bad 135 crank hp from a 102 hp motor with simple bolt-ons. I consider the cam a simple bolt-on.

Dec 30, 2003 | 05:52 AM

#11

tgreaves

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Re: mini-me and cam timing - help (Mista Bone)

A little confused here..

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mista Bone »</TD></TR><TR><TD CLASS="quote">
Warm car up, adjust idle to 700 rpm and ignition timing to center mark.
</TD></TR></TABLE>

Ok.. Got it..

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mista Bone »</TD></TR><TR><TD CLASS="quote">
Change cam using a adj. cam gear at zero. Adjust cold lash settings, start car.
</TD></TR></TABLE>

Do you mean to adjust the adj. cam gear until I am exact at TDC meaning like 4.75 degrees adv/rtd.. Then im guessing I let the engine cool off and adjust the valve lash.. Is that what you are saying

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mista Bone »</TD></TR><TR><TD CLASS="quote">
Now reset the ignition timing @ 700 rpm, BUT use the cam gear instead of the dist. to change the timing setting.
</TD></TR></TABLE>

Well if I just adjusted the cam gear to exact TDC (ex. 4.75 deg adv/ret) and I go and adjust it again to get the ignition timing back into spec well then I would be right back at 0 deg again and be 1/2 tooth off

Dec 30, 2003 | 10:03 AM

#12

Mista Bone

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From: Cincity, OH, USA

Re: mini-me and cam timing - help (tgreaves)

start with cam gear at ZERO (markings on the gear) when installing the cam, check the lash, THEN set the ignition timing via. the cam gear.

You should be near 4-5 degrees on the cam gear. Using this method you will eliminate and possible error. Like if the marks are 3 degrees of when etched!!!!!