A friend doesnt believe it will retard the cam if you get the head milled. I need some simple YES or NO's and if YEs. please state why it retards the cam. thanks. (on SOHC or/and DOHC)

 

I'd like to know as well.

My head is milled .040 and I set the cam gears at 0,0.

Should they be advanced a certain amount of degrees per .010? Or vice versa (retard certain amount of degrees per .010)

 

Anyone?

 

Milling the head or decking the block decreases the distance between the cams and crank. The timing belt stays the same length, so for every .012" you remove, cam timing is retarded 1 degree. Advance accordingly to get back to true zero.

Rhetoric - For your .040" mill I would advance both cams to +3 to get them close to true zero.

 

Thanks for the help.

So 6 degress advanced on both intake and exhaust? (I believe that is +3)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rhetoric &raquo;</TD></TR><TR><TD CLASS="quote">I'd like to know as well.

My head is milled .040 and I set the cam gears at 0,0.

Should they be advanced a certain amount of degrees per .010? Or vice versa (retard certain amount of degrees per .010) </TD></TR></TABLE>

Wow! Isn't that a lot to mill the head? What motor is this? I can't imagine you're running large cams with that much shaved off the head.

 

i'm running skunk stage 2 cams in my ls/vtec with .040 off the head.. my cam gears is set +2+4

 

It could affect timing. But you would have to remove ALOT in order to do so.

 

Anyone else have any opinions on the amount shaved vs degree retarding?


Modified by ranta18 at 6:25 AM 8/21/2003

 

I run stage 2 skunks with .040 mill on my itr motor.

Will the motor ping if advanced too much? I am not too sure what my ign. is set at at the moment.

 

No just +3 degrees. I know some cam gears adjust in 2deg increments, so use 1.5 marks on the gear to get 3 degrees.

 

Because the distributor is attached to the end of the intake camshaft any changes made to the gear will change the ign timing as well. You need to adjust it everytime you make an intake gear change. The exhaust can be adjusted without affecting ign timing. I would do +3 degrees on both the intake and exhaust with your setup and set the ign timing to 16btdc. If you gears are 2deg per mark, only use 1.5 marks for 3deg. Remember to short the service connector under the dash when setting ign timing, otherwise the ecu will try to correct it as you change it. The changes I have described will not cause your motor to ping.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sleeper &raquo;</TD></TR><TR><TD CLASS="quote">Milling the head or decking the block decreases the distance between the cams and crank. The timing belt stays the same length, so for every .012" you remove, cam timing is retarded 1 degree. Advance accordingly to get back to true zero.
</TD></TR></TABLE>
This is absolutely true, I have watched it happen, holding everything else constant during a change in a cylinder head deck. Not sure the .012" is scientifically proven, but it is pretty close and a good rule of thumb.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91integraLSVTEC &raquo;</TD></TR><TR><TD CLASS="quote">i'm running skunk stage 2 cams in my ls/vtec with .040 off the head.. my cam gears is set +2+4</TD></TR></TABLE>

What pistons and headgasket? I talked to a guy who had a b16 with .030 milled, a Mugen headgasket, and JUN 3s(skunk2 2s) and was having a problem with the pistons trying to hit the valves. I always thought .030 was a lot to mill off I didn't know there were people who went even farther.

 

I'm new here and after reading some of the posts,no choice but to sign up.

I have a milled head as well (.040), I was wondering if that thoey of 3 degrees advanced works on any cam and/or any setup, here is the setup I put in my wife's car, has about 1500 miles on the motor now. Any suggestions are very welcomed.

Exhaust
Ractive Fireball Muffler
Ractive Nickel Plated 4-2-1 Header
Ractive High Flow Catalytic Converter
Head (D16Y8)
Felpro Permatorque Head Gasket
Comp Cams Quick Time Cam p/n 59300
Zex Springs
Zex Titanium Retainers
Oversized Valves
Intake : 30mm (non v-tec integra)
Exhaust : 27mm ( JDM DOHC ZC motor)
Ported & Polished with a 3 angle valve job by Edelbrock. Street & Strip Class
AEM Tru-time Adjustable Cam Gear
ARP Head Studs
Milled .040
Transmission
Custom Made Stall Converter by Landis Converters
Transtar Transmission Cooler
Engine Block (D16Z6)
Eagle H Beam Rods
JE Pistons 10:5:1 Compression
JE Chrome Piston Rings
High Performance Rod & Crank Bearings
Block has been notched and bored to 2.973
Air/Fuel Delivery
AEM Fuel Filter
B&M Fuel Pressure Regulator
B&M Fuel Pressure Gauge
Russell Anodized Fuel Line Fittings
Venom Polished Fuel Rail
Venom High Flow Fuel Pump
Venom High Flow Injectors
Ractive Air Intake
Ractive Air Filter with Heat Shield
Apexi V-AFC
Ignition
MSD Blaster Coil
MSD Sport Compact Ignition
MSD Distributor Cap
MSD 8.5mm Spark Plug Wires
Nitrous
Venom VCN 1000 Nitrous Unit
Edelbrock Purge Solenoid
Miscellaneous
Unorthodox Ultra Light SS Pulley Kit
Crane Cams Vacuum Canister

 

I also have .040 milled head, Jun3 cams, stock camgears advanced 2+ on intake and exhaust. I have lsvtec. I'm afraid if I advance anymore it'll hit the valves.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91integraLSVTEC &raquo;</TD></TR><TR><TD CLASS="quote">i'm running skunk stage 2 cams in my ls/vtec with .040 off the head.. my cam gears is set +2+4</TD></TR></TABLE>Just wondering, is that intake:+2 and exhaust:+4 or the other way around?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91integraLSVTEC &raquo;</TD></TR><TR><TD CLASS="quote">i'm running skunk stage 2 cams in my ls/vtec with .040 off the head.. my cam gears is set +2+4</TD></TR></TABLE>
what kind of pistons are u using?

 

I have my ign. set 17 degrees and had advanced my intake and exhaust 2 degrees.

No pinging so far, btw, how much of an affect would a hot day be (if any)? Sometimes I noticed during hot days, my car tends to ping, is this unusual?

Oh yeah, I run stage 2 skunks.