m50 non-vanos hot cam timing

[Scyber]

Could somebody make an accurate calculation with scheme how much is the corner difference between those cams?

[DTM190]

Subscribed.

Much difference in idle?

[Scyber]

Anyone?

I would need that info like next week, so could anyone confirm or calculate?

Pretty big bang if done wrong :D

[Scyber]

Anyone? Maybe links to other threads?

[Scyber]

I calculated the lobe centers and durations

Intake opens: 19 BTDC (9.5 degrees on the cam)
Intake closes: 41 ABDC (20.5 degrees on the cam)

Duration 19+41+180 = 240 degrees
Lobe Center ((41-19)/2+90)= 101 degrees ATDC

Exhaust opens: 35 BBDC (17.5 degrees on the cam)
Exhaust closes:13 ATDC (6.5 degrees on the cam)

Duration 35+13+180 = 228 degrees
Lobe Center (35-13)/2+90= 101 degrees BTDC

Timing for nonvanos intakecams
Exhaust opens: 41 BBDC (20.5 degrees on the cam)
Exhaust closes: 19 ATDC (9.5 degrees on the cam)

Duration 41+19+180 =240 degrees
Lobe Center (41-19)/2+90= 101 degrees BTDC

[Scyber]

exhaust 50,5degree on cam before top dead center
intake 50,degree on cam after top dead center

So the difference is exact 101 degrees. Intake cam should be turned 101degrees clockwise and then lobes will be in same place.

I´ll measure the back end of the camshaft for timing jig and make one nextweek.

thanks for help.

[jeds320i]

isnt there a build thread on how to do this? guys have done it before so if they havent made a build thread they should lol. im no good at math when ur talkin about all these degrees and such lol

[Scyber]

Haven´t found one yet.

Links if anyone know good ones.

[dave.a.cote]

Wow, I forgot about this thread. I have my dual intake cams installed and running on megasqurit. All seems good but I am not wondering if the timing is as good as it can be. Does anyone else have any experience with this?

[supra_speed]

any more info on this?

[dave.a.cote]

After doing some more reading, I am satisfied that my timing is good. I am now thinking of having my intake cam reground to s50 intake specs

[drulle]

interesting thread... I want to know more also... is there new software needed? or is this simply a matter of adjusting the cams and done?

Interested in this as well since I just installed NV motor in my e30. Would I need any other tuning or just properly adjusted cams?
Thanks