Recommended Camshaft Timing

[s13silvia123]

what are the recommended camshaft timing on BC 272's with JWT Cam gears.

yeah i know its BC's its for now then i'll pick HKS later when i do a VET head swap setup instead.

what should or how should i advance or retard the cam gears at on a SR

http://i5.photobucket.com/albums/y159/team_city_image/a915d951.jpg

[s14unimog]

I'm not sure its quite that straight forward. I've always thought it was a lengthy process of dynoing that car back to back with 1 deg adjustments to either cam. OR maybe there is sort of mathematical solution based on the cams dimensions. Still, I don't see how it considers what else is done to the motor. GL with it, let us know what you end up doing.

[slider2828]

Yeah its really not easy, you have to be on a dyno and have adjustable cam gears.... There was an article before from BC....

Contact Steve Shadows, I think he has done it before....

[s13silvia123]

Yeah its really not easy, you have to be on a dyno and have adjustable cam gears.... There was an article before from BC....

Contact Steve Shadows, I think he has done it before....

i was thinking about thatbut its going to be hard to say cause everyone runs a different setup and cam timing is going to hard to adjust

[slider2828]

There is a method to doing it, and he has an idea on the method. There is going to be no absolute number, but you gotta know how its done first....

[steve shadows]

For street setups I really think you can't go wrong with 2 degrees of advance on the exhaust cam and 1 degree or .5 degree of retard on the intake cam...

The idea is to time them for the best overlap to make the most power...

Tuning them on the dyno is possible but it just costs a LOT...at least if the shop is actually putting in the time to test and adjust back and forth properly...

I Know this goes without saying for most, but you must have adjustable cam sprokets to adjust cam timing...

If you have VTC and EMS like Haltech, AEM and some of the other advanced unit you can actually control the timing advace on the intake cam with the VTC solendoid...very cool stuff.

With cams as large as that the gains/money you will get spending a thousand dollars or so on time with a professional dedicated EMS / engine tuner and dyno is not really going to impress much.
Cams that large already have A LOT of overlap and as long as your engine is assembled I would concentrate on EMS tuning and prep work elseware...272s already have A LOT of overlap as it is

The BC cams are very good cams in light of some of our recent dyno results... I believe a lot of the bad numbers are thanks to either bad tuning or the rest of the installs setup/parts are not working together properly or poorly installed...

The BC cams really surprised me on output with our last tune we did!

[s13silvia123]

thanks steve youre awesome. but this isnt for a street tune but i'll that advice and use it for now until i'll figure out what i really want to do with this setup i have.

as of right now i have a PFC and youre right seems like everyone is ditching the PFC and going for Haltech. i might be considering doing that after i do the VET head swap.

i'll come out to SOCAL this coming summer to learn more from you when i come down for my fishing trip.