I called a shop to ask how to tune Toda cams. I asked when would you want to clay and when not to. He suggested I call Toda and get a spec sheet on these cams with this motor. The tech at Toda said I should go to my original dealer and they will provide info on this matter. He, the Toda tech, says, even F1 dials the cam gears according to this said spec sheet first and foremost and never touches the cam gears on the dyno. So I need to have this info so not to bend valves and not to have to clay the head----expensive and apparently unnecessary.

He says that if I had bought the cams directly from toda , that he would provide this info. I bought them here on h-t. I know someone has this spec sheet...

thank you.

 

and how do i use a "degree wheel"?

 

I'm not sure if Toda recommends degreeing the cams in on the VTEC lobe or not, b/c I know that they do list the primary lobe open/close points at 1mm (.039") of lift, so it may or may not be necessary. Ask Gregg (CHEETAH). He seems to work with Toda cams a lot.

If you have to degree the cams in on the VTEC lobe, you have to lock the rocker arms either by flip-flopping the pins (only locks the left and middle rocker arms) or placing a small, hard object behind the small pin to lock all three arms. If you only lock the two, make sure you read off the retainer that is locked, otherwise you will be reading the lift and duration of the wrong lobe.

The degree wheel:
You don't use the degree wheel by itself. It's useless by itself if you don't reference it correctly to TDC.

Use a piston stop in conjunction with the degree wheel to set the motor exactly to TDC with the head and timing belt installed and tensioned. Adjust the degree wheel's TDC so that it corresponds with the motor's TDC. Recheck accuracy of TDC correspondence. I'll put up the details later on if you don't know how to do this.

Mount the magnetic base dial indicator stand on a plate bolted to one of the cam plate bolts, or directly onto the cam plate bolts. Set up the long-stem dial indicator on a retainer so that it reads parallel with the valve's up/down motion.

Rotate the engine in the direction of normal rotation (CCW from front of motor) and read the dial indicator. When you hit .039" of lift on the opening angle, read the degree wheel. Make sure that it matches the manufacturer's given specs. If not, adjust the cam gear accordingly and recheck.

 

wouldnt all 98 R spec motors with b cams all be the same as far as where to advance or retard the cams?

 

Sounds like a royal pain in the ****!!!!!!!!!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18crx &raquo;</TD></TR><TR><TD CLASS="quote">wouldnt all 98 R spec motors with b cams all be the same as far as where to advance or retard the cams? </TD></TR></TABLE>
No. A single set of recommendations doesn't account for any milling of the decks, variances in production tolerances, or even the accuracy of the markings on the cam gears themselves.

Here are the specs that you need to use to degree the cams to true TDC and synch them to the crank angle. I haven't confirmed these specs yet, so I don't know whether they're measured at 1mm (.039") or .050" of lift. I think they're measured at .050" b/c the durations are shorter than what's listed on the Toda Racing site. I'd double-check them with a local Toda distributor, CHEETAH, or Raceline Development. Or, have one of them give you a copy of the spec sheet.

Intake
Primary
open - TDC
close - 30 degrees ABDC
midpoint - 105 degrees ATDC
duration - 210 degrees

Secondary
open - TDC
close - 30 degrees ABDC
midpoint - 105 degrees ATDC
duration - 210 degrees

Hi Cam
open - 25 degrees BTDC
close - 50 degrees ABDC
midpoint - 102.5 degrees ATDC
duration - 255 degrees

Exhaust
Primary
open - 30 degrees BBDC
close - TDC
midpoint - 105 degrees BTDC
duration - 210 degrees

Primary
open - 30 degrees BBDC
close - TDC
midpoint - 105 degrees BTDC
duration - 210 degrees

Hi Cam
open - 45 degrees BBDC
close - 20 degrees ATDC
midpoint - 102.5 degrees BTDC
duration - 245 degrees

 

i hope the mechanic/tech has a Rosetta stone to decipher. ill take this and hope it helps. thank you.