unless you want to make sure the housing and everything is not leaking, so yeah im using a leak tester on the front of the turbo to pressurize the entire system. So answer me this, if im getting blow by through my pcv reroute hose is my motor hurt?
s366 question
- Thread starter Polaris7x
- Start date
I answered that early. If you are pressurizing the entire system (engine included, which obviously you are) you will have air leaking past the piston rings and coming out the blowby tubes. It's usually not a bunch. When I've done it i've been able to unhook the air supply and pressure will slowly bleed off. If you've got a ton of air coming out the blowby tubes slowly bar the engine around and see if it stops. If it does, continue to bar it around and see if it's isolated to the one cylinder. I'd venture to say you probably don't have an issue with the engine. Your only complaint is low boost pressure. Maybe you have a drive pressure leak, or you just don't have enough fuel to make anymore boost or the wastgate opens to soon. Fill out your sig and tell us what all you have done to the truck.
phat shaft with billet wheel 366, built suncoast trans, air dog 200, bobos tunes, bd manifold, 4 inch exhaust, egr delete kit and pro fab 3 inch bridge, 3 inch banks ic pipe, banks technicooler.
truck ran like a raped ape the first few days after bob tuned it and then all of a sudden it just lost everything. nothing but smoke and egts get past 1600 and thats after i put the new intercooler on, before they never went about 1200
i understand hooking up a drive pressure gauge will determine that but at the moment i dont have that, so how or what are the signs of that? where do i look?
no it happened before, and then i took the ic pipe off and found oil going right into the stock cooler, so i sent turbo back to ii and they rebuilt the thing, didnt even have 300 miles on the turbo before the seals went, so i tried cleaning the cooler out and it didnt work so i bought a new one figured down the road when its twinned i would want one anyways. Sooo who wants to take this truck home and fix it for me?
He may be pressurizing through another office. That 90* elbow screws into the compressor side (turbo outlet) right before the Hot side IC. A tube runs from the gate, to the psi reference (compressor) and the boost from there opens the gate to deviate overall boost.
To op... I'm on tapatalk. So I cant see your sig with mods. If your not running to big of a tune (anything bigger than I have) I'd say to just plug your gate. Undo the hose, and screw a bolt with some rtv around it into the hole on your compressor. You will not overspin your turbo.
The reason I say you won't is because you build 30psi with a hole in your elbow and a leaking waste gate hose. plug em and I bet you see 35. The rest will be in changes to your tune.
Depends on your tune bud. Sure, I can boost a 366 to 50#. Will it be efficient? No. But the op is getting 30psi max with a very small leak. Fix the leak and it may get 35#. The leak was coming from his gate. That's why I said to just bypass it. It's obvious his tunning isn't that hot.
I agree, a change that severe like he is describing would be a good size leak.
Can you hear leaks coming from anywhere else? Weld up a cap for the downpipe so the system is sealed off $.02
Can you hear leaks coming from anywhere else? Weld up a cap for the downpipe so the system is sealed off $.02
Adjust the waste gate and put a solid 90 elbow in the compressor. Then your good if you still only has 30psi of boost add more fuel
Adjust the waste gate and put a solid 90 elbow in the compressor. Then your good if you still only has 30psi of boost add more fuel
He said he's high EGT's and low boost. I'd say adding more fuel will just raise EGT's even higher. Sounds like the wastegate is either hung open, or broken.
Sorry didn't read the whole thread i talked to him last night and he just told me low boost, never said anything about high egts.
yeah sorry mark i failed to mention that, but thats only been since i put the new cooler in and its only on tunes 4 and 5, see this is where i wish i still had the stock turbo to throw back in there and see what she does then.
as for air coming out the exhaust we didnt hear or feel anything. Like i said before the majority of the loss seemed to be coming through my pcv tube, i tried capping them and then the breather tubes themselves started leaking
so i guess im confused here. youre saying it did this before AND after the new cooler, and also only AFTER the new cooler. ill ask again, did your low boost and high egt's start right after the new cooler went it? i would start looking at hoses/clamps and the new cooler for leaks.
Sorry for the confusion, when truck got tuned after turbo went in truck ran awesome, stock cooler and egts were never abve 1200 and psi on turbo was peak 38 or so, truck ran great for about a week. Then all of a sudden it fell on its face. So then new bridge, egr delete kit rebuilt turbo only 200 miles from ii and new cooler truck still runs like complete crap, lots of smoke and real laggy and really high egts now, leak tested it yesterday and NO LEAKS AT BOOTS OR ANYTHING OBVIOUS other then a pin hole on the banks weld on the 3 inch ic pipe and a loose boost tube fitting. Truck runs decent in milage tune so not sure really anymore, cause i was hoping it was gonna be something really easy
Where exactly is your gauge reading boost from? I prolly wouldn't plug your crankcase ventilation if your pumping air into the cylinders. Sounds like a good way to blow out gaskets and seals. Just a thought. Fwiw a boost leak big enough to cause noticeable performance issues could be heard with the hood up and someone spooling a few Psi while the other person listens. Of course I would recommend setting parking brake, chalking the tires and trying to avoid standing in front of the truck while doing so. Oh yeah ear plugs will help too.