Data logged 25minutes worth of driving. The experience can only be summed up as "smooth, linear power". The power delivery is phenomenal down low, and just excels as the rpms climb. I'm now confident the honed/extrude not only eliminated any boost taper but is allowing me to hit 8.5-9psi confidently before red-line and simply sticks there. Its an analog gauge so who knows how 'off' it can be but seems to be working perfectly to me.

Log's suggest the tune is dialed in, if anything slightly on the rich side (to be expected). Once the bumper went back on everything quieted down significantly. You can hear everything, but the exhaust overpowers it a bit...anyway - more updates later on. Still here at work.

nice:tup:..in for more updates..

In for some videos! Congrats on the successful build Danny, two thumbs up.

in for dyno results!

I didn’t forget about u guys! My friend was off to some competition out of state and his mechanics were not allowed to operate the dyno without him, so I couldn’t do it on Thursday/Friday.

Its kind-of off topic, but I did a few pulls with one of my friends with a 335i that just ran 12.4 three weeks ago. I normally wouldn’t even come close to challenging him but man were we both surprised. I'll be honest, I knew my car felt faster but I'm so used to turbo power than the linearity of this charger was quite deceiving. I spun 2nd and 3rd but still powered threw those gears and by mid-4th I was pulling on him by a couple of car lengths. He's on RE11s so with better rubber I could pull even harder/quicker from him.

Either way - that felt great and made me feel even better about this whole project!

I'll try to get numbers and video this week.

Does his 335i have software installed on it?

Nice! Can't wait to see the dynos :tup:

12.4s 335i probably has a tune and bolt ons. I'm assuming no less than 350whp on the bimmer? My friend has a 335i himself. First guy I'm gonna race when the SC goes in haha.

so can we now conclude that HFC's/TP's + CBE have no effect on boost level on VHR's?

ya he's got, upgraded fmic, chip, intake, cbe...stock cats tho. He did 12.4@112...so I was very happy with our little test.

I would say the downpipes + cbe are good to go with the charger. I'm having no issue sticking around 8.5psi/9

Danny,
Are you getting the flutter that seems really prevalent in some of the videos in the G37 vert thread?

I am. Good news is it doesn't seem to have any impact on performance. But regardlless, it's annoying and we are all chippinng in to nip it in the butt quickly. I think Sam will have a fix as soon as this week, so I can handle that.

Cool. I was just curious if it was a few cars or if all of them were doing it.
I am beginning my penny saving for some form of forced induction so I have and will continue to follow your progress.
Thanks for the info. :tiphat:

From what I have read in other supercharged car forums it sounds like the bypass valve isn't capable of moving enough air. The solution in the other forums to eliminate the fluttering sound was to put a larger flowing bypass valve or install two bypass valves.

This may not be the true solution. I've put a larger bypass valve. It may be more of the location. We will find out more when Sam works on the fix this week.

Do you think running an open-air BOV would make it worse?