Thread: 6262 dyno Results and freeway vid p30

Here you go sir

Thanks for that Vadim. Not sure why mine is so far forward. I will double check tomorrow. But for now... dyno results.

Which one is the 20v?


Well, in case you didn't guess, the BLUE line on that graph is the 20V cams. Cam switch at 4500 to compare to the 1.6 cams. 14psi on all runs, but I will say that the a/w was a little heat soaked. You can see that power in boost is very similar, the 1.6 cams having a heap of torque in the mid-range. But the 20v hold better after 7800rpm.

Here is my 20V cams on 14psi vs the VET cams on the log manifold and 24psi. I like this graph.

Here is the graph of the 1.6 vs 20V on same boost, same timing. Lined up with my dizzy mark.


Here is the past 2 runs compared to what 1* timing does on the 1.6 cams. The RED line indicates 1.6 cams with a slight bump in timing.

This graph shows the advanced timing 1.6 vs the 20V cams. The MBC seemed to keep the wg closed longer, or delay opening. But you can really see when the 1.6 cams switch there is a huge difference! The mid range power is very good compared to the 20V cams. But you could feel the struggle after 8k a bit. The 20v cams like to kick intake first, then bring the exhaust cam on later. Not sure why that is... but the spike in power didn't happen on the 20v cams when they switched. I am happy to see the power not dropping off though.

hmmm interesting. TBH i expected the 20v's to have a little more midrange, kind of like more power before the kick then equal from there. But I guess the dyno doesn't show whats going on under 4k

Also why is the kick on the 1.6 at 4.5rpm, I thought you where switching at 3xxxrpm?

great comparo though. Always great work

On this dyno I kicked at 4500rpm, just to show the jump in power. I was switching the SR16 cams at 3800rpm exhaust on the street. It helped to spool the turbo. When the 20v exhaust kicks, it bogs unless it is kicked at 5000rpm. The intake smooths the power down low. So the SR16 cams should kick the exhaust first, then intake at 5k. the 20V cams are the opposite.

The idle quality, and sound of the 20v cams is nice. Smoother at idle. Overall, they feel great and the powerband is more consistent. The SR16 cams made awesome mid-range with advanced timing. But I suspect the 20V cams would have done the same thing with more timing. The top end with the 20v cams is noticeably better on this particular setup.

Bottom end power seems the same really. Out of boost, other than the better idle quality, I can't tell a difference. Once in boost, the exhaust on the 20V sounds better, less raspy, but also doesn't seem to have the same kick.

So. On to the next subject. A Precision 6262 may just fall in my lap. Do I keep the twinscroll and go GT35r? Or do I jump on the .82 6262 and never look back?

.82 6262 and never look back.

I am sooo close to biting the bullet on it. Sell the GT30r. I can make 500+whp with it, but I really don't wanna chance the maf blowing up from 30+psi boost lol.