Safe to tap a coupler for WG?
 

I picked up a Samco coupler elbow today. Is it safe to tap for my WG nipple there? my charge pipe is wicked thin so i dont wanna tap that. Or once again, should i stop crying and just buy a tap and tap my compressor housing.

Re: Safe to tap a coupler for WG?
 

You should buy a T fitting and run one off a vac line off the IM.

Re: Safe to tap a coupler for WG?
 

I was just trying to tap close to compressor so i get accurate readings. but i guess i could just T in.

Re: Safe to tap a coupler for WG?
 

what you just said makes no differance at all just T into something on the manifold or BOV or something. I blew a motor a month back because of a wastegate line. That shits important if you feel so bad about it you have to post the question don't do it..

Re: Safe to tap a coupler for WG?
 

persoanlly i would rather always tap as close to the compressor as i can. if you tap manifold and have a leak between the source and the turbo you could be spooling (hypothetical) 30 psi just to make 10 psi in the manifold....WAY overspinning the turbo...also robbing power....

check this fitting...works great f or tapping a coupler

http://www.atpturbo.com/Merchant2/me...egory_Code=FTG

http://www.atpturbo.com/root/release...cktap2_450.jpg
http://www.atpturbo.com/root/release...cktap4_450.jpg

Re: Safe to tap a coupler for WG?
 

i use a manifold source. just t in a vacum manifold and your done.

Re: Safe to tap a coupler for WG?
 

It doesn't really work like that. If you have a boost leak the car won't run right an you'll know you have one. The boost gauge might read ten psi but the car won't run like thats what your getting.

Re: Safe to tap a coupler for WG?
 

I always like to go off the manifold as well. Then you dont have to worry about any pressure loss through the intercooler as the CFM increases. Its just rock solid boost. If you have a big enough boost leak it wont matter if the source is near the compressor or intake manifold. It wont be able to build pressure as easily either way.

Re: Safe to tap a coupler for WG?
 

Re: Safe to tap a coupler for WG?
 

Lol, thats some retarted logic.

Re: Safe to tap a coupler for WG?
 

funny....i guess corky bell is retarded then...as well as every other turbo designer who engineered their turbo with a port for wastegate refference for that exact reason

fact of the matter is...i understand most cases manifold works fine...but i've had a bad experience on one of my setups where there was a major leak before the maf on a blowthrough setup and the wg refference was pulled off the mani....spun the piss out of the turbo to make full boost and destroyed the thing as well as didn't perform the way it should have....the only way we found out was cause i finally drove the car and saw boost falling off.

Re: Safe to tap a coupler for WG?
 

in that case, even if you had a boost leak right after the turbo, it still wouldnt be able to create boost because it'd be dumping air into the atmosphere. I dont see why there'd be much difference in getting your signal from the IM or the compressor housing. ???

Re: Safe to tap a coupler for WG?
 

I think you mis understand Corky Bell... BTW, the only turbo Corky designed failed, miserably. Now he makes twin turbo Shelby Cobra replicas. Just put the ------- thing on the manifold, that's just how its done

Re: Safe to tap a coupler for WG?
 

Robbie is correct.

Getting the boost reference from the manifold is an easy way to bypass any small leaks in the system and is a easy way to cover up simple problems as well as get the boost level you want, but in reality you are placing the compressor in an unknown pressure ratio area, and possibly over spinning it.

Re: Safe to tap a coupler for WG?
 

wouldnt the compressor over-spin no matter what, no matter where the boost reference is coming from? True you're gonna get maybe 1-2 more PSI at the compressor than the IM, but in the end, they're all the same "hose".

If there's a leak right after the compressor, the turbo aint gonna make boost and over spin, if there's a leak at the intake manifold, the turbo ain't gonna make boost and over spin.

Re: Safe to tap a coupler for WG?
 

The only way the turbo is NOT going to overspin is if the leak is small enough.


If the leak is so bad that you don't build any boost, then that means the WG is not opening and the turbo is free to overspin from the uncontrolled exhaust. This is easy to spot and correct though, unless you're a retard and just keep driving it like that.

The very bad situation is when the leak is just large enough to facilitate the boost level you want, but the turbo is actually spinning so fast to flow that huge CFM (flow for the engine PLUS flow for the leak) at the low boost pressure.

The other downside is that at that point on the compressor map, it is so inefficient that your IAT's will skyrocket.

Re: Safe to tap a coupler for WG?
 

I've had that happen. It was a bitch to troubleshoot. Warped BOV flange. >:D

Re: Safe to tap a coupler for WG?
 

exactl...guys...i'm not trying to be a cocky ass or anything...just sharing an exact experience that happened to me on one of the kits i built...it actually destroyed the turbo in less then 2 months

Re: Safe to tap a coupler for WG?
 

Smartest thing said in this thread

Re: Safe to tap a coupler for WG?
 

For real if you know anything about a turbo car at all you can tell when you have any kind of boost leak at all.

Re: Safe to tap a coupler for WG?
 

No you can't. Not with the refererce at the manifold.


Whitey, this thread is too much for you to understand; go back to your ABC blocks.

Re: Safe to tap a coupler for WG?
 

I know with all this advanced turbo theoretical physics using Corky Bell as a main reference, I’m just way out of my league here. ::) I'll sit this one out while you keep explaining how your not able tell if your car has a boost leak. :3

Re: Safe to tap a coupler for WG?
 

No references are needed. This is a simple concept that most people can understand, except that you're a monkey, so you're kind of hindered I guess.

Re: Safe to tap a coupler for WG?
 

Your the one who has no idea if your car has a boost leak or not. It doesn't get any simpler than that. whats your excuse?

Re: Safe to tap a coupler for WG?
 

You are seriously mentally handi-capped. Your family should stop inbreeding.

Re: Safe to tap a coupler for WG?
 

First off, if you have a leak like that somewhere, overspinning your turbo won't be a problem, as you won't be making enough power to spool it up much. I can understand using it if you're maxing the turbo and can't run any higher due to not getting that last CFM out of the turbo. But not because you're a twat and can't produce a turbo setup that has zero leaks - you should be checking that before turning the key:

Pop off your IM coupler and the turbo coupler. Pop in a 2" pvc cleanout w/plug, tap a gauge in one end, a valve step in the other. Pressurize with a bike pump, compressor, your mom's lips, etc. BOV might leak if you don't pressurize its port, otherwise the gauge will not move if there's no leaks. I did this in a minute, after I tracked down the cleanout with the gauge. Damm think popped off at 25psi, shot out of the garage 20ft!