#Leo#

With lowered head (in total the head is now 0.050" lower ( milled head + thinner head gasket) and Delta 272 that I purchased from Delta Cams, could you tell me, should I set my ignition timing to 18° BTDC as in the stock car value?
I must re-set it, because I used a adjustable cam gear and advanced my cam timing (cause of lowering the head) 2 degrees on cam gear wheel.
I have a timing gun, and was just wondering, where to set my ingition timing, to 18° BTDC or? Any suggestions or tips?
Thanks.

PyroProblem

Stock is probably best, Id go for around 16 degrees in case your compression is too high for pump gas. If you get any knock, try retarding to 14 degrees. This is assuming you dont have a tuning software and chipped ecu...

Shaving the head will retard cam timing, so youll need to advance the cam gear to return the cam to the correct position in relation to the crank. You need a degree wheel to reposition the camshaft accurately.

#Leo#

I have a adjustable cam gear, and I will compensate the had mill with it.
Is the degree wheel neccessary, because I do not have one. I simply set my crank with the marking (TDC) notch on the crank pulley facing up, and set my cam gear as manual says. I'm sure I got it right, just wanted to know what to do with my ignition timing.

PyroProblem

To set your cam timing exactly, you need one plus a dial indicator to measure valve lift. Im sure you can get it "close enough" though by advancing a few degrees...

As far as ignition timing(base timing). Id just run stock unless your getting some knock. Your static compression has gone up with the head milling so run premium fuel if you dont already...

#Leo#

OK, I'll run European 98 octanes gasoline.
My compression bumped up from cca 9.1 :1 stock, to 10.3: 1 now.
I found, from several sources, that for every 0.037" milled I need to advance my cam timing for 1° cam. So, for 0.051" in total, I'll advance my cam timing for a degree and a half. I think there will be no problem.
Thanks.

#Leo#

Well, I finally assembled the engine today, set the valve lash, then set the adjustable cam gear (advanced it 1,5° cam for 0.051" lowered head in total). I started the car, but it struggled to idle, then died. Night set in, so I decided to leave the adjusting for tomorrow.
I'll play a little with idle control screw, and with ingition timing, to try to set it right. I'm pretty sure that I didn't miss a tooth when putting on a timing belt.
Any suggestions what to do?
To turn up the idle?

#Leo#

Can anyone tell me, to raise the idle speed, do I turn the idle speed screw on TB clockwise, or counterclockwise?
I checked on Delta 272 box, it is statet to set the valve lash to 0.006" intake and 0.008" exhaust, so, I got that one right.

PyroProblem

counter clockwise im pretty sure. You can also adjust the small throttle stop set screw.its a very small allen i believe...reset your tps if needed.
Good luck!

PyroProblem

If you still have trouble getting it to idle, you can try raising the base timing a little, but BEWARE this increases your timing everywhere now and you may get knock...just fyi
You might need to advance the cam a little more. Your actual cam timing may not be exactly where it needs to be...I dont know if theres an exact formula for head milling vs.cam timing..

#Leo#

Well, I've done some research based to the head milling and cam timing, and, it's stated that for every 0.037" milled, you need to advance your cam for 1° (cam degree). As my head is lower in total for 0.051", I advanced my cam 1,5° (cam degrees). Will keep you posted, today after work, I'm going at it

#Leo#

How do I reset my TPS???

PyroProblem

check voltage with a voltmeter. .5v at throttle closed, 4.5 at WOT. ONly really needed if you adjust your "stop" screw.
This gives the ecu the correct throttle position...