If that's in response to me, I was talking about the stillen open house dyno video.

It doesn't. This isnt a positive displacement sc, its a centrifugal, it builds boost like a turbo. At idle, without load, it will not make boost. Yes its spinning, but so are turbos at idle, its not spinning fast enough to make any kind of boost, in fact the engine is probably taking in more air naturally than the sc is pumping at idle.

I wasn't trying to be a smartass, I was just saying that the Stillen SC uses the same valve, on the same car, on a similar system and so its the closest thing you guys have to compare with. Just trying to narrow down the search for you, believe it or not.

My car does NOT flutter at all.

Any new GTM installs out there now that the intake pipe has been fixed and has been available for a few weeks? Anyone get their GTM kit to break 390 whp? Anyone able to get more than 6 psi boost with the new pipe?

Thanks for the updates!

I have the new pipe. I am a pinch under 9psi boost. I have not dynoed yet. I want to give it a few weeks before doing that.

x2

mine is being worked on now..i'll give updates as soon as i get it back..

A pinch under 9psi? I thought it was a 8psi pulley?

Yeah> i have a cheap analog guage. I'm not worried about a pinch under 9. If it was reading 12 then yeah I'd be worried.

Lets rephrase. Thats probably wrong, but could you plug your car into the dyno when you do the runs?

My hks camp II read 8.5psi of boost

Fezzik, how cold is it in chicago? might be why...

yeah its mid 50s i did some runs in low 40s.. maybe

Its dropping into the 30's and 40's here in Jersey at night and so far no problems with the cold/hot start. My car is always garaged though so we'll see tomorrow. I'm planning on really opening her up tomorrow and sending the logs of some beastly 4th gear pulls to Sam, hopefully he can further tailor the tune to my car. I'm eager to squeeze every bit of power out of it. So far though, smooth as butter!

P.S. All this is being done without meth yet. I plan to dyno it first, install meth, dyno again.

What boost psi are you seeing with this danny. Also what part of jersey you from. Thats where me and my girl friend are from just currently in virginia since thats where I am stationed at. (I'm in the navy)
Frank

Ah sweet!

Well I was raised in Elizabeth, and I'm currently in the Short Hills/Millburn area. Just 15 minutes from Newark airport.

I think this honed/extruded pipe really did the trick as boost definitly has the capability of climbing past 8psi. But its only at 7000rpms+ for me, so its doing whats its supposed too as far as I can tell. Unless I was going to go past 8k I dont see myself ever going past the 8psi mark. Maybe 8.5psi... But i'll be honest, tomorrow will be the day I can give a bit more concrete info as I'll be really letting her loose.

Well I think that answeres some questions since alot of others were wondering if the kit was pushing the PSI that it said it was able to. I found it truely impressive how great of a tuner Sam is that he can do all this with out the car infront of him. Honestly makes me wonder how well my car would perform if it was on his dyno and him adjusting the parameters.
Me and my girl our from the cherryhill area. Good luck bro tomorrow and please keep us updated.
Frank

Nice, Danny. Can't wait to get my new intake pipe as well.:tup:

He has a base map/tune that works on everyone's car then he makes slight adjustments based on whatever he sees on the logs that you send him. Its more or less the same exact thing as tuning, except it takes a whole lot longer. The answer to your question is "not that much better" although it would be quicker. As an example, say he saw your AFR go too rich from 3000 to 5000rpm, he would go back to your map and take out a little fuel in that rpm range. He would look at the rest of your logs and make whatever tweaks he deems necessary. You get the new map, log a few more runs and he can see which, if any, changes need to be made. Repeat the process until he is happy with the logs and you're happy with the way it drives. Its not as complicated as people make it seem.

Some people actually choose to do it even after they have dyno tuned the car. Dynos can't accurately reproduce real world conditions, so its always a good idea to do some runs out on the road with a logger so you can send the data back to the tuner to verify that everything is working as it did on the dyno.

Its not too complicated but its a nice service that we dont have to do the tuning. Sure it takes longer but that's some cost savings.

Thank you RCZ I wasn't fully sure on how the process worked since I never had my car custom tuned.
Frank

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?

I performed that test already. Ran it atmospherically and by the time I got back from around the block I put it back...It did get a little more pronounced (worse).

Could it have anything to do with the fact that it recircs to one of the two intakes only?

What I dont get is why you guys think its the BPV when it makes the noise under throttle and the BPV should be closed at that point..

It makes the noise when you let off the throttle.

That's weird, this bypass valve shouldn't make any noise at all.

During idling the bypass valve should be slightly open, throttle should be closed, in between shifts open.

It could be an issue with trying to control that part throttle boost; if the system is trying to regulate part throttle boost by rapidly opening and closing the BPV rather than holding the diaphram partially open could be an issue with how the vacuum from the intake manifold pressure drops to a vacuum and thereby operating the BPV or in unequal pressure between the intake manifold and the intake plumbing.