boost shooting up in first

[QUIP'6']

just put in erics chip WOW 18# of boost and no knock amazing anyway in first gear the boost shoots to 21# then settles at 18. what can i do to prevent this have an rjc bleeder valve and i have the wastegate set at 1/8 preload.

 

[Paul Clark]

Someone correct me here if I'm wrong -
Think boost ratings for chips are mainly a 3rd gear kinda thing.
Higher boost levels in lowers gears is okay. You're not in first gear very long, and there's not as much pull on the motor as there is in 3rd.
I think.
Paul

 

[scottyb]

Is the RJC unit a bleeder or a relief valve?

I had similar problems, and went thru all kinds of stuff to correct. My theory is that the fast spool items such as a relief valve are not really suited to stock turbo/converter. Guys raving about these items typically are curing a slow spool issue from bigger turbos.

I suggest you first go back to the stock solenoid setup, then experiment from there if you still have issues.

 

[Squid4life]

Chip info would also be helpful. Are you using a 93 octane chip, 100+, etc? What timing and boost levels are on the chip?

Squid

 

[QUIP'6']

its the rjc bleeder valve and the chip is erics 94 octane 20* in 1st and 2nd 18* in third

 

[scottyb]

If it's this , then it's a relief valve. I made one almost exactly like it (before RJC was selling them) and I had bad spike as well. Remember the intent of that valve is to enhance spool - but you now have too much! Again, I think you should set up the stock solenoid and re-evaluate. Eric's chip will liekly do a good job with boost control.

 

[Russ Merritt]

You can also try using them both together. I try it both ways on most cars and see which one seems to work best on that particular vehicle. Set the boost controller at say 12-15 and then hook it up to the solenoid valve that will control it from there...... Some cars respond better than others but try it and see.....Just take you time and be careful.

 

[QUIP'6']

thanks ill try that do you still leave the preload on the accutator at 1/8 then hook up boost controller then to the solonoid?

 

[Russ Merritt]

Yea, the boost controller goes to the straight part of the y. Then the y gets hooked up as normal. When your 1 pound low on the boost setting, tightening the rod 1 turn usually gets you exactly on the mark. Usually steady as a rock, provided your wastegate hole is large enough to control the boost. Keep us posted how you do....

 

[QUIP'6']

Yea, the boost controller goes to the straight part of the y. Then the y gets hooked up as normal. When your 1 pound low on the boost setting, tightening the rod 1 turn usually gets you exactly on the mark. Usually steady as a rock, provided your wastegate hole is large enough to control the boost. Keep us posted how you do....

tried it but got worse

 

[Russ Merritt]

Is it by any chance a HD actuator? Trying to control HD actuators under 20# is tough. If you hook the hose directly from the compressor housing to the actuator, what is the boost? Trying to see if you really have control of your boost...... If hooked directly and still over 15# (high rpm) you have work to do.......

 

[QUIP'6']

Is it by any chance a HD actuator? Trying to control HD actuators under 20# is tough. If you hook the hose directly from the compressor housing to the actuator, what is the boost? Trying to see if you really have control of your boost...... If hooked directly and still over 15# (high rpm) you have work to do.......

its a regular accutator. now it shoots to 21 then to 18# and stays i get no knock its just when i floor the gas an any gear

 

[Mack V]

The RJC boost controller is a part that is bought through Grainger. It's nothing new and cost (off the top of my head) about $5.00 to make. They are selling them for $49.00.
I have five or six of them now just laying around.

 

[QUIP'6']

The RJC boost controller is a part that is bought through Grainger. It's nothing new and cost (off the top of my head) about $5.00 to make. They are selling them for $49.00.
I have five or six of them now just laying around.

i have one on thats when the problem started

 

[Lee Thompson]

test

Have your pressure tested your actuator?

 

[scottyb]

i have one on thats when the problem started

You have a stock turbo? Take out the relief valve and put the stock solenoid plumbing back in. Go from there.

 

[QUIP'6']

thanks guys

 

[Mack V]

i have one on thats when the problem started

The grainger valve is known for overshooting the desired boost level at first but it should settle down to where it is set. I don't have experience w/ any auto's using the valve so I am not sure what will happen on the shifts.

 

[QUIP'6']

The grainger valve is known for overshooting the desired boost level at first but it should settle down to where it is set. I don't have experience w/ any auto's using the valve so I am not sure what will happen on the shifts.

thats what it is doing 21# then settles at 18# and stays