BP kit folks. Question on wastegate plumbing.

solidus

I got it all back together and everything is peachy but I'm spiking to 13.8 with the 7.5 springs. Trying to figure it out after the 10.1 springs got sketchy on me and I did'nt want to revisit "The incident" so I swapped back. EBC is currently not in the plumbing to keep it simple. Anyone else go through the troubleshooting with spikes. I just reinstalled the WG's so I'm sure all the plugs are there and the diaphrams are'nt pinched. Pickin brains here people.

Jayhovah

Could you use an air compressor to pressurize the wastegates to make sure they are both opening properly?

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solidus

Done. I'm replacing all the vacuum lines but just trying to cover everything before I reconnect the EBC.
https://youtu.be/EymvhSOREog

Boosted Performance

From charge pipe on the driver side (there is a nipple there) run a line down to where your clutch cylinder is. Install the supplied T fitting at the end of that line, use the remaining two ports on the T fitting, and run one line to the bottom of each wastegate.

Leave one port on the top of each wastegate open to atmosphere (bolt the hose barb on the top, so that debris can't get in).

Really no reason for any spiking if everything is plumbed this way.

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YzGyz

I had spikes too. Ended up changing springs, driving around and seeing what I can hold and spike. I cleaned my WG checked the diaphragm, used compress air n guage and everything to check to make sure my ebc/boost guage was reading right. Heck, I even installed a mechanical boost gauge in line wth my ebc. They read the same. So I just changed the spring. Been good since. I think I posted about it in my build.

YzGyz

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YzGyz

solidus

Which spring did you end up going to **edit I saw you used the 5.5 and plugged the top**. ( Question is did it yield a consistent 9psi? ) I had installed the 10lb spring and it spiked to 16psi with the intention of dumping the EBC. "The incident" quickly came back to mind and I went right back and changed it to the 7lb spring. It seems that the boost spike correllates to the spring pressure though because at 10lb it hit 16 and at 7lb it hit 13. I did'nt do a log graph so I'm not sure of the duration but each time it was a momentary pull but the scary part for me is that neither of them were WOT. During "The incident" when it hit 23.8 and anhillated pistons it was a WOT run with what I know now was bad plumbing.

The current plumb is as Sasha described , but my suspicion is a bad line from the charge pipe may be affecting the wastegates response. According to Amazon my new vacuum lines will arrive today so I'll see how this turns out. I'll also be reconnecting the EBC but leaving it off till I work out the spikes.

YzGyz

I don't remember what spring I ended up with. I just know that when it came out to be something like 7lbs psi. I used my EBC to ramp it to 11.5 psi for high boost and 8 psi for low boost. I left my mechanical gauge on while I dialed it in to make sure that both correlated for a few weeks. After I was sure of the reading, I D/C the mechanical to rid of the clutter.

I posted on my hunt for the overboosting in my build post 248

YzGyz

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YzGyz

solidus

Yeah I read your post you said the 5.5 spring. I may go ahead and do the same since I'm gonna swap the vacuum anyway. Thanks for the insight.

jax4557

I already told you how to plumb it I guess you "aint calling me a truther"

Mine is as follows:

From port 2 on the EBC to top of waste gates
From port 3 on the EBC to driver side charge nipple boost source
From driver side charge nipple boost source to bottom of waste gates

I am running the 8 PSI spring and with my EBC off I get 7.8 PSI pretty consistently. With it on I have it set to around 10 PSI low and 13 PSI high.... Its currently off until I see get on a dyno for the below reasons....

solidus

Right on target YzGyz. The 5.5 spring got me 7.7 psi EBC off. Started tuning the EBC and inadvertently found the 11.3psi target at 30% set value. I'll back it down to 24% then start working on setting up the gain target when I have a co-pilot. That should ramp up the boost quicker and hit a target short of around 11.5psi but we'll see. Today I'll set up low boost starting at a set value of 2% looking to hit 9psi for a low boost setting. Finally get to set my beautiful gauges in the pods instead of just hanging out in holes today. Kept getting interupted to plug in tree lights , find boxes and help wrap this or that. Feeling Grinchy.

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solidus

Yesterday I got low boost sorted with a 4% set value yielding 8.3psi that was a good number considering I'm looking for a 9psi low boost setting. Adjusted the high boost setting to 24% which bought me to 10psi. So now everything is set as far as basic low and high boost numbers. Next phase requires a trip to Mexico and a co-pilot to set up for gain. Overall boost will increase when I set gain which is why the current peak boosts are a couple psi lower than target.

lj909

Florida to Mexico and back to tune? I'm sure you can rent a dyno for less and get more consistent results.

Get real

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solidus

Not to be rude but you're out of your depth. Seriously.

For clarity and to expand your insight "Mexico" is a euphemism for an out of the way place free of traffic and relatively safe to do things that wouldn't be reasonable or prudent in a congested area or your neighborhood. Tuning an EBC for gain requires wide open throttle runs under load in search of boost drop off at higher rpm. When it's detected you adjust the gain in 1-2% increments and repeat the process until surge. When you get surge you back off the gain until the desired result is achieved. Don't get it twisted I'm new to this but this is the basic concept. And for the record IMO "tuning" on the road is a better tune than a dyno tune for driving. I experienced that with my Titan when I went from full bolt to Jim Wolfe cams. Had to add all this because I don't want to come off as an a$$ and my intent isn't misconstrued.

JGuebara14

I'm currently having this overboosting problem! With ebc off I hit as high as 13.6 @ WOT, low boost setting is at 9.5 I hit 10.6. (I have the 8 psi springs that the installation booklet recommended to install)

lj909

I shouldn't have posted it in the first place. I know what all this means, not out of my depth. "Mexico" is just a legal cover story and for some reason, i get annoyed when i hear it. GL with your build

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