too much boost

[84svo2.3]

yea when i bought my 84 svo it was making 16# of boost on regular and i cant figure out why now since its a bit cooler its making close to 18 it doesnt have the bcs all it has is a vaccum line hooked up straight to the wastegate and ideas might help

[Californiadreamr]

I wonder if your fuel switch is backwards somehow? I have never pulled a switch out. Does the boost go down on premium?

[NavySVO]

it doesnt have the bcs all it has is a vaccum line hooked up straight to the wastegate and ideas might help

Can you supply pics of the entire area(s)? It's pretty hard to diagnose with this description, Like, where does the hose from the wastegate even go to?
Here is the stock setup.

[84svo2.3]

i dont have the soleniod either, no the boost doenst go down it comes on faster and the switch is set on premium, ill try to get pics

[SVOeric]

The stock guages are known to be highly inaccurate, so I wouldn't be so sure about those 16 and 18 numbers.

If there is NO BCS, aftermarket, or otherwise, it would peg the boost gauge ever time you 'nailed it and held it' One of the mods some people tried was a wire splice put in the vacume line, that could be acting as your boost controler.

I think we need to see how the hoses are routed. The 84/85 systems are pretty different from the 85.5/86's

[under pressure]

The increase in boost has to do with the lenght of hose you are using to by-pass the boost solinoid & the change in the air density with the cooler drier air. The electrical connector you disconnected from the BCS sends a return signal to the ECA to let the computer know the the boost is at 15 psi. setting up max parameters for fuel delivery. Even if you don't use the BCS that connector needs to be plugged in for maximum engine performance! Rick

[84svo2.3]

well the car had a ford racing boost gauge and it was making 16# of boost but it was stolen, the stock gauge now says its making 18# but im trying to get pics on here so ya can help me out

[84svo2.3]

well my boss took a look at my car and said that the vaccum hose to the wastegate was hooked up wrong so i rerouted it and put a manual bc and set it at 14 psi and put it on the dyno it made 142hp and 215tq(i know thats weak) my boss said that my cat was all clogged up and needs to be chopped of and i will pick up more power

[under pressure]

"Scotty I need more power"!, "Captain she can't take any more"!

[greg_pro50]

Will 18 psi hurt the engine? Mine is pushing out 18psi as well but that is what the manual boost control was set at when I got it.

[NavySVO]

Will 18 psi hurt the engine? Mine is pushing out 18psi as well but that is what the manual boost control was set at when I got it.

It all depends........

Head gaskets can survive with 20 pounds of boost......and fail at 10. It just depends on the engine condition (trueness of surfaces), what type of gasket is used, etc.

Detonation is your worst enemy here. Unless you have good fuel, good fuel supply, and can cool down the air charge, expect to get the checkbook out.

[greg_pro50]

The only mods on the car is a 255lph fuel pump and a T-bird intercooler. Are those pics you posted for an engine that would be similar to my '85? I think I was going to try to hook it back up to stock to tone it down a little and see what it is like if it is as easy as switching a couple vacuum hoses around. I'm going to have to check the timing. What should the timing be set at?

[90lx86svo]

well my boss took a look at my car and said that the vaccum hose to the wastegate was hooked up wrong so i rerouted it and put a manual bc and set it at 14 psi and put it on the dyno it made 142hp and 215tq(i know thats weak) my boss said that my cat was all clogged up and needs to be chopped of and i will pick up more power

Those hp #'s are about right. Since 84's had 175hp and you accout for about 40hp loss for drivetrain, 142rwhp is about right.

[NavySVO]

Are those pics you posted for an engine that would be similar to my '85?

It is from my car which is a stock (other than Forced4 breather and BPV kits) 1985 1B.

[jayG]

The stock guages are known to be highly inaccurate,

Im not so sure a/b that...my stock guage is dead on my autoguage. I could just be lucky.