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Cam Timing for Quicker Spool
Posted: Wed Apr 20, 2011 2:49 pm
by thrash
I remember reading somewhere on the forums that playing with exhaust (i think) cam timing can help get boost earlier in the rev range.
Can anyone share any concrete information on this? Experiences? Drawbacks? How many rpms worth of extra boost did you get etc?
Posted: Fri Apr 22, 2011 2:11 pm
by WANTSOM
Tuner/dyno/time/experiment/money = result :beer
Posted: Sat Apr 23, 2011 3:47 pm
by Mick
My two bobs is:
i asked my tuner about this same thing; he tunes targa and track evo's...
He said for a small turbo im running (TD05 20G) its not worth worrying about for the street and a bit of track, but has seen good results retarding the exhaust cam up to a few degrees for brutal midrange while only losing a couple kw's up top; like lose 5-6kw's up top and gain 20kw's mid!
worth looking into!
Posted: Mon Apr 25, 2011 9:35 pm
by MR Bender
thrash
just turn your cam gears all the way to the left !
trust me
:D
seriously
i think what Mick said is right !
you have to have a play with the exhaust cam but anything you change will have to be checked by your tuner anyway.
Posted: Fri Apr 29, 2011 9:38 am
by Mick
yeah good one bender!
like the only way to get enjoyment out of a 202 is to advance the timing two teeth and do what you can for the last 45 seconds of its life!
whatever adjustment you make be dead sure to tighten the bolts back to spec, slipping from there is bad news, and the hks ones come loose...
from memory i think its about 3* retard on the exhaust cam to get fat midrange.
Posted: Fri Apr 29, 2011 4:16 pm
by thrash
thanks for the info guys
the hks ones come loose?
what brand ones are you using then?
Posted: Fri Apr 29, 2011 6:07 pm
by Mick
yeah the hks ones i bought were loose, made sure they were tight before the engine was started :beer