Car will not make boost. Need some help

[Zimmers]

At 9psi it only made 467? I'm pretty sure it's a boost leak issue but my main question is still this. Is it possible that there is a leak under the higher flow from the turbo that won't show up while pressurizing the system with my boost leak tester.

Had a set of aftermarket NA camshafts which hurt the power and kept the timing very low. We have another car making 480 all stock on 9psi.

 

[Makdaddy]

The other day I was out doing some logs for Lito. Everything was going great but he wanted me to lower the boost until we got the tune more dialed in because I'm still on my stock plugs. I was at 9psi but decided to bypass my tru-boost and just run wastegate pressure for now. I unhooked the boost solenoid and ran a line direct to the wastegate. During my log my boost skyrocked and triggered the alarm so I let off. When I got back to the shop I noticed I put the wrong line into the compressor housing. I accidentally ran my boost reference to the top port on the wastegate. After putting it right it will not build any boost.

Smoke test didn't reveal any leaks

So Im confused
The car ran fine with the same intercooler and old WG and BOV?

As stated above in the quote it only had issues after you connected the WG wrong from the EBC

 

[Sprayer84]

It's seem to unless I had it wrong from the beginning.

 

[CPRsm]

The duty cycle could have been sky high to get the turbo to 9psi to start with.

If you measure the pressure drop of that cooler you'll know for sure.

 

[Sprayer84]

The duty cycle could have been sky high to get the turbo to 9psi to start with.

If you measure the pressure drop of that cooler you'll know for sure.

I'm not sure how to measure the pressure drop on the intercooler without having some nipples welded onto the inlet and the outlet. It's already going to cost me 60 bucks to have that one pinhole welded up. I know earlier you talked about tapping them. Should I just drill a hole, buy a quarter inch tap, tap it and thread some nipples in?

 

[Zimmers]

The duty cycle could have been sky high to get the turbo to 9psi to start with.

If you measure the pressure drop of that cooler you'll know for sure.

He's made 25psi accidentally a few times when the boost controller was hooked up wrong.

 

[Zimmers]

I'm not sure how to measure the pressure drop on the intercooler without having some nipples welded onto the inlet and the outlet. It's already going to cost me 60 bucks to have that one pinhole welded up. I know earlier you talked about tapping them. Should I just drill a hole, buy a quarter inch tap, tap it and thread some nipples in?

Just bypass the intercooler and if its bad we can exchange it.

 

[Zimmers]

I'm not sure how to measure the pressure drop on the intercooler without having some nipples welded onto the inlet and the outlet. It's already going to cost me 60 bucks to have that one pinhole welded up. I know earlier you talked about tapping them. Should I just drill a hole, buy a quarter inch tap, tap it and thread some nipples in?

Actually if it has a pin hole it needs replaced anyways

 

[Makdaddy]

The duty cycle could have been sky high to get the turbo to 9psi to start with.

If you measure the pressure drop of that cooler you'll know for sure.

OK he didnt benchmark the total output of the turbo before hand
Gotcha

I am now thinking about hooking the boost gauge in my AEM WIdeband to the compressor side as a reference.
the EBC gauge could read off the vac mainfold block I installed from the rear of the intake manyy.
That way I could monitor both compressor and actual boost to the system

 

[JoshK]

You need a real intercooler....

I agree. I wonder what the IAT rise is over a full run with that intercooler even at 9lbs. If you ever plan to forge, you just as well replace it with a good one now.

 

[W3bb3r04]

My intercooler comes out on the same side and I have no boost loss at all!

 

[Sprayer84]

I agree. I wonder what the IAT rise is over a full run with that intercooler even at 9lbs. If you ever plan to forge, you just as well replace it with a good one now.

On my datalogging for Lito my IAT's were within 10° of ambient

 

[Sprayer84]

My intercooler comes out on the same side and I have no boost loss at all!

Is yours a vertical core or horizontal?

 

[W3bb3r04]

Mine is vertical! Sorry I missed that post. Its the stock on3 one. I'm sure someone has one laying around you could buy off of them

 

[Sprayer84]

Anybody have one laying around?

 

[Makdaddy]

On my datalogging for Lito my IAT's were within 10° of ambient

Thats Normal IIRC

 

[CPRsm]

I'm not sure how to measure the pressure drop on the intercooler without having some nipples welded onto the inlet and the outlet. It's already going to cost me 60 bucks to have that one pinhole welded up. I know earlier you talked about tapping them. Should I just drill a hole, buy a quarter inch tap, tap it and thread some nipples in?

Yeah, but use a 1/8npt tap. Stand the cooler on the hose end side while you work. Drilled and tapped aluminum will mostly fall out on it's own. If it is fact dropping all that pressure thru the core your back pressure is likely close to 3-1

Macdaddy you only need to measure once at a given boost level really, as a baseline. Any more than that you'd just he monitoring to see if compressor pressure goes up as an indication of a boost leak somewhere.

 

[toorbeenee]

Yeah, but use a 1/8npt tap. Stand the cooler on the hose end side while you work. Drilled and tapped aluminum will mostly fall out on it's own. If it is fact dropping all that pressure thru the core your back pressure is likely close to 3-1

Macdaddy you only need to measure once at a given boost level really, as a baseline. Any more than that you'd just he monitoring to see if compressor pressure goes up as an indication of a boost leak somewhere.

+1,

on all the cold side on my car i have brackets that holds down all the pipes together, meaning they will never snap a part from each other which eliminates boost leak

 

[Sprayer84]

Intercooler delete mod

 

[Sprayer84]

Poor car, just wants to go fast