The Cam Timing Challenge
 

I have an appointment next Wednesday with Tuner Transformation star Shiv Vishnu and would like to hear some peoples theories on cam timing. I will probably only have enough time to do 4-5 changes. Right now, I am at -3,-3 so that will be my baseline. I will probably do 0,0 as one of my data points. My goal is to improve my torque curve, even at the expense of peak horsepower. This should be a neat experiment.

Let the theories fly :).

tuning celebrity shiv vishnu?

lol!

Ted B would be another good person to talk to about cams and timing.

yeah. there are like two huge threads on this. i think one by ted b and one by quicksilver. it basically boils down to what you'd like:

for 264s, 272s, or combos:
more torque, flatter power curves, lumpy idle = -2,-2
less torque, higher peak horsepower, smoother idle = -4,-1

You don't remember that segment on Tuner Transformation? They called Shiv, Shiv Vishnu. I don't know where the video segment is, but here's the keyed graphic with Shiv's tv name :) http://www.vishnutuning.com/images/N...age_index3.jpg

I think I may try -1,+1 , +2,+2 , +2,-1.

Now, you have straight 270's, so check with TedB, but on my staggered combo, Ted's recipe of +2i/0e, transformed my car, which had originally been set at -3/-3, into a super torquey, much faster-spooling beastie.

I am not even curious about experimenting with other possible settings. TedB is The Man. Now, m y car hits peak boost(19.5#) by 3100 rpm in 5th, when mashed from 2500 rpm. You have the bigger turbo, so I would imagine that you wanna improve spoolup and low end grunt. Well, the advanced settings are where it's at.

As a side benefit, with +2/0, you get that really spooky, spilunking idle, with which to ward off innocent pilgrims.

You never saw that show Tuner Transformation? I even grabbed a still off it with the caption "Shiv Vishnu" as his name just as seen on the show.. Its posted up here somewhere..

Keep us posted with what works. I think the +2, 0 combo will work the best.

If you get the chance, give +1/-1 a chance...

I was likening shiv to a mr john basedow, aka the fitness celebrity.

I've tried a few different combos myself but was unable to try:

+1/-1
+2/0

I am running -2/-2 which provided me with the best overall curve and about 1k sooner peak torque than 0/0.

I am going to add +1/-1 to my list.

So here is my perliminary list:

+1/-1
+2/+2
+2/-1
-1/+1
0/0
-3/-3

I love my +1/-1

I've always wanted to try something more aggressive on the intake side like +3/-2 or +3/-1