3400 turbo I'm building.

[Joseph Upson]

If I had known you were attaching a 3-spd to it, I might have told you that. Been there and done it. Holds firm with a shift improver kit installed but when it reaches normal operating temperature the fight is over. I do recall a partial fix being the installation of a Ford style band by removing the rivets from the end so that you could attach a GM style end, the band is a bit wider than the stock 125 band and therefore has more holding capacity.

Did you get the blow off valve off EBAY? How well does it work and what kind of pressure can it handle. The setup is very pretty in a motor head kind of way, you know, manual shifting at WOT and 6500rpm or whatever the rev limiter allows kind of way.

[germ]

i would remove your PCV valve and put a breather on, or put a catch can on there.

[Guest]

i would remove your PCV valve and put a breather on, or put a catch can on there.

WHY?

For one it will not be emmisions legal then.

For two, the PCV will close when boost is made.

[germ]

if at any point the PCV does fail and it leaks boost into the cyl head, you can kiss your engine good bye if you dont catch it in time.

also, since your running boost, your pcv will be forced closed by the boost, thus it will not allow any pressure that has built up from blow by to escape the crank case, which will cause issues.


and the pcv has nothing to do with emissions. it pulls in air from the crank case to avoid pressure building up due to blow by and it helps seals the rings to help prevent blow by.



you do as you want, but since ive been running a turbo for ~2 years now on my 3400, i can only offer advice of things that i have noticed.

and the pcv was an issue that i had a few times until i yanked it off and put a breather on.

[germ]

also, thats an SSAC turbo isnt it


ive had a few of them.


your running an oil pressure restrictor right? if not, i would suggest that you put one on very soon.

[germ]

oh, i forgot to add about the PCV system...

the way you have the oil drain going into the rear head is a very good reason why you need to let the pressure that builds up in the crank case to escape.

if pressure is building up in your crankcase, which i gaurantee it is, it will not allow the oil to drain as efficiant as it needs to be. thus causing your oil drain to be a restricted and will cause premature turbo bearing failure.


just an FYI

[germ]

sorry, i also have another note of advice for you....


put some clamps on ALL of your vacume/boost lines.

i dont see a single one in those pics and eventually i would bet that a line is going to come loose or start leaking vac/boost and its going to cause you a lot of head aches

[Guest]

I appreciate the advice, but I can counter point just about everything you just said.

The PCV STILL pulls are from the crank case, just as it would at WOT N/A, since well there is, or I am currently working on adding a tube from the rear valve cover to the compressor inlet, acting just like it would N/A being connected just before the TB.
So the PCV stays.

The PCV has EVERYTHING to do with emmisions, ESPECIALLY in this area. If there is a filter breather used, which would be on the other valve cover BTW, fines will be layed.

Also the design of the PCV system is just fine and works BETTER to keep it in tact similar to OEM then it does to use a breather. I too have ran a turbo for quite a while now.

Also look at any OEM turbo system, you'll see it's set-up just like any N/A set-up, just that the fresh air inlet is pre compressor, not pre TB.

About the oil drain, it's really not much different then going back into the oil pan, other then there are less cyclonic forces in the rocker area then the oil pan. Also Banks has ran TT systems on SBCs for years that way, so I think it'll work just fine.

It seems that you are under the same mis conception that far too many other people are. The PCV system doesn't include the PCV valve ONLY, but also includes the vent, which on the 3400 is on the rear rocker cover, that at WOT is where the crankcase pressure is "allowed to escape" or when done properly, pulled from the crank case.

About the "clamps", yeah I'll be adding some, but at the 9 PSI I've it up to all of the hoses and such have stayed right where I put them, barbs are a great thing.

Believe me, I've gone over every aspect of this build.

[Berettaspeed]

wow i just stumbled upon this and it looks good man..
one thing on that PCV i would make sure it does not see boost. i forgot to take it out of my intake manifold. i had oil from my valve cover and oil pan coming out from the gaskest area. not good. so i rerouted the tubes so they are not going into the plenum and you can redirect the tubes to the intake before the turbo to make it legal. on the none boost side. i just have mine going to the fender and just a breather filter on mine. the 3400 has it going into the plenum on top of the TB area.

[Guest]

wow i just stumbled upon this and it looks good man..
one thing on that PCV i would make sure it does not see boost. i forgot to take it out of my intake manifold. i had oil from my valve cover and oil pan coming out from the gaskest area. not good. so i rerouted the tubes so they are not going into the plenum and you can redirect the tubes to the intake before the turbo to make it legal. on the none boost side. i just have mine going to the fender and just a breather filter on mine. the 3400 has it going into the plenum on top of the TB area.

Thanks.

Again, about the PCV, that would not be legal in this area, that is still not recirculating into the engine, and being vented to the atmosphere.
Also a properly selected PCV will not allow Boost into the crankcase, which is probably where you guys have been having your problems.

For a proper functioning PCV system, one side HAS to be connected to the plenum, or in a high vacuum area when the throttle is closed, the other side, pre throttle or in the case of a turbo or supercharged vehicle, pre compressor.

[Doubt_Incarnate]

"maximum boost" just recomends you use check valves to prevent boost from getting to the wrong places, it doesn't say anything about removing the pcv system altogether, that i can remember anyways. the pcv system is there to remove the blow by gasses but its also designed to run those gasses tru the motor and out the exhaust to be burned/re-burned and not vented to the atmosphere, thats where emmisions comes in. The_Raven obviously knows what he's doing since his jimmy still works. removing the pcv is the easy way out, like how i tend to bypass or remove problems instead of solving them.

i think its a really cool setup, way better than the one i built. wait... thats right, i didnt build one . and with gas ever on the rise i likely wont.

this isnt the only forum i've been on where few people dont understand how the pcv works, no offence to anyone, maybe there should be a breif write-up or explination of the pcv system added to the "In Depth" section.

[germ]

I appreciate the advice, but I can counter point just about everything you just said.

The PCV STILL pulls are from the crank case, just as it would at WOT N/A, since well there is, or I am currently working on adding a tube from the rear valve cover to the compressor inlet, acting just like it would N/A being connected just before the TB.
So the PCV stays.

The PCV has EVERYTHING to do with emmisions, ESPECIALLY in this area. If there is a filter breather used, which would be on the other valve cover BTW, fines will be layed.

Also the design of the PCV system is just fine and works BETTER to keep it in tact similar to OEM then it does to use a breather. I too have ran a turbo for quite a while now.

Also look at any OEM turbo system, you'll see it's set-up just like any N/A set-up, just that the fresh air inlet is pre compressor, not pre TB.

About the oil drain, it's really not much different then going back into the oil pan, other then there are less cyclonic forces in the rocker area then the oil pan. Also Banks has ran TT systems on SBCs for years that way, so I think it'll work just fine.

It seems that you are under the same mis conception that far too many other people are. The PCV system doesn't include the PCV valve ONLY, but also includes the vent, which on the 3400 is on the rear rocker cover, that at WOT is where the crankcase pressure is "allowed to escape" or when done properly, pulled from the crank case.

About the "clamps", yeah I'll be adding some, but at the 9 PSI I've it up to all of the hoses and such have stayed right where I put them, barbs are a great thing.

Believe me, I've gone over every aspect of this build.

raven, i never said you didnt know what you were doing. you have done a great job.

however, every bit of advice i have given are things i have noticed since i have boosted my 3400. its not to disrespect, its to help out.

your choosing to do it the "right" way by keeping the pcv system intact. were i am located, we do not have the strict tests to keep our cars on the road. for me, it was much easier to remove the 2 tubes and slap on a filter. it causes me no future worries if the PCV valve is working or not so i have peace of mind that it wont fail and destroy my engine, ive been down the road of a stuck pcv. it was only advice that i was giving because the pics you have posted do not indicate what your saying.

also, i dont like the idea of dirty air going into the compressor side of my turbo. i would rather not take the chance of gunk having a chance to build up on the fins and housing. thanks, but no thanks.

also, i am fully aware of how the pcv system works, i even explained what it does. but when turbo charging your car, i would rather have piece of mind.


i never said anything bad about your oil drain setup, i think its quite clever honestly. i just mentioned that if the crank case does become pressurized, your oil will not drain properly and may cause some premature failure with any turbo. again, only advice.

as for your clamps and vac/boost hoses. i too use barbed hose fittings, however, over time, they will become loose and cause a boost leak. again, just advice.

[Guest]

I guess that's where our experiance and desire to have things function differs.

Honestly, even if it wasn't a fine to have an open atmoshpere crankcase vent on, I would still set-up the PCV system the way I have. The engine WILL run cleaner, and WILL last longer with a properly functioning PCV system. Usually make a couple extra HP too.

With enough suction past the tube connection at the compressor inlet, and the PCV closed on the other side an actual vacuum is created in the crankcase, helping to seal rings and also to help the pistons move down in thier bores, helping create addition HP. The fact that the compressor will be pulling a LOT of air through the inlet will help create a vauum effectwhen the tube is connected properly to the inlet.
This is why I will be running an A.I.R. pump on my truck when it comes back out, converted to vacuum duties, but the smog police don't need to know that.

Just so you know how stingy the emissions nazis are around here, a friend of mine has a '79 Mustang Pace car, these cars came from the FACTORY, with an open element crankcase breather, he still had charges layed for "improper emisions equipment". Eventually it was dropped due to "insufficient evidence", though the prosecutor knew they were in the wrong. This car is also PAST the required cut off date for e-testing, yet they still go after anyone that is driving on teh street if they are suspected of altering thier emmisions equipment.
Some people are being charged with open element air filters, which I really don't understand, since air has to get to the filter somehow. *shrug*

[Kohburn]

where do you live? so i can remember to neve rlive there

[Guest]

where do you live? so i can remember to neve rlive there

Ontario Canada....

I've heard that the emmisions tests for strictness is only second to Cali, but I have not verified that.

It's really not that bad.

Honestly I'm all for keeping cars running clean, just some of the things they are trying to enforce are a bit much.