That's WAY off. The actual math says it's closer to .04-.06 psi/ft:
Pressure drop = pipe friction coefficient X (pipe length/pipe diameter) X (density of air/2) X airflow velocity^2

Real world that may come up to .08-.12 psi/ft so over 10' (of straight pipe) you would lose one (1) psi. Yes, between bends, rough transitions and the intercooler you will lose more but if you're losing 10+ psi of boost you really need to reevaluate your set-up. Pushing 16psi at the turbo's, I'd expect at least 10psi even on a rear mount setup. Keep in mind at these levels of boost, you should see no more than 2 psi of pressure drop across a "good" intercooler.

FYI the 4th gen F body guys are seeing less than a 3 psi drop with the STS kits.

Also, you've said in the past you've seen ~6psi then I think the cat bit the bullet and you've only seen ~2psi since. Have you checked you air filters/ piping/ intercooler for any blockages? Something is either clogged or leaking or your gauge is off.

 

I haven't noticed that but now that you mention it... I did see a bit of white smoke coming from the exhaust tips a couple minutes ago while the car was idling.

I am still running the oiling system from a sealed tank which is pressurized by the same pump that's feeding it. This coming weekend I'll be doing an oil change as tapping into the oil bungs down by the oil filter to run the feed and return.

In regards to the boost readings... I'm gonna see if the shop can pressure test the piping to make sure I have no boost leaks. I'm using a cheap boost gauge from autozone. Hopefully that's not the problem. Thanks for the breakdown of the math on how to calculate pressure loss.

When it's not one thing it's another... Lol

 

Here is a video I made last night of the gauges as you guys requested.

 

Sick stuff man. I love the sound the car makes.

Can wait to see the dyno numbers

 

That could be an effect from running a completely straight exhaust. from the engine all the way back. When I had my old V6 honda, I ran headers, High flow cat on a straight pipe and I always got a little smoke when I would just accelerate

 

^Yeah, it could be a # of things; new exhaust still burning off, turbo oil burning, catless exhaust system, or blow-by from the motor.

Not sure what was to be seen by that last video; but I'm still thinking a boost leak, maybe even from around the nice headers?

 

Raised the internal wastegate pressure on both turbos. I'm hitting over 6psi at WOT now but I notice those boost numbers don't kick in until after 3rd gear. I'll be getting the car dynod tomorrow morning. Can't wait to see what numbers it does!

 

Nice. Good luck and make sure they are logging AFR's and boost at a minimum. Try and get some OBDII PIDs like knock, inlet temps, timing, etc if they have the capabilities.

 

I'm doing it a a reputable shop called European auto source here in so cal. I'm sure they have all the equipment to monitor all that.

They do work on tracked out M3's and stuff like that.

Will make a go pro video for sure!

 

Cant wait to see what your numbers will be bro...

 

Tonight didn't exactly end as planned but still on schedule to dyno tomorrow. I mixed 2.5 gallons of e85 into half a tank of 91 octane fuel.

Update... Don't run e85!!! About 10 miles of driving it finally went into the fuel lines and it's running like complete garbage!

 

How fast were you going lol and I think your car is in need of a wash

 

Did you put the E85 in by accident (I hope)? If not, why oh why did you ever think that was a good idea?
E85 requires 30-40% MORE fuel to run properly compared to gas. The additional fueling along with significant advances needed in the timing maps is outside the scope of what these ECU's can handle not to mention injector/pump limitations.

I hope you put some miles and a LOT of fresh gas through the car last night...

 

I did it on purpose to see how the car would react. My friend says that if I did a small mixture like that it would actually raise the octane levels but nope he was wrong. I burned through that half tank and pumped fresh 91 octane. I guess they overbooked the dyno this morning and I've been waiting for ever for this s65 powered e36 m3 to get off the dyno. Have a meeting with clients at 12 so more than likely the runs aren't going to happen today

 

Yeah you kinda have to plan a whole day around DYNO shops. When me and my buddy built his G8, all the cars had to go through tech inspection first before starting the first dyno session. It was a place down in jersey. We were there at 8am and the car didn't get on the Dyno til like 2:30-3pm