Anyone else get a boost spike with the RJC boost controller?

[neat]

I get a pretty bad boost spike (3-4 PSI sometimes) with the RJC boost controller. I ended up taking it off and just using the threaded waste gate rod to turn up the boost. I'd like to have a controller that was easier to adjust though.

I also like the faster spool with the RJC controller, but I think that is probably contributing to the problem. The stock turbo spools really fast; the process of the boost passing through the controller (at 19 PSI we'll say), building up in the line and actuator itself, then pressing open the puck, and finally allowing enough exhaust to bypass the turbo to bring the boost down; that process is not instant and it can't get the turbo slowed down in time, hence the boost spike.

Anyone else have this problem and come up with a fix?

 

[rodman99999]

I never saw boost spike with my TA-49 until adding the RJC(never had instantaneous spool-up either, 'til I got the RJC). Ported my wastegate hole and PRESTO: No boost spike!!

 

[Boston GN]

Mine's rock solid. Never a spike although my wastegate hole is ported/matched to my DP

 

[Adam Connell]

I had that same problem too with spiking... I dont remember exactly what I did to fix it... I believe I had to play with the tension on the WG rod. It was a trial an error process for me. I hate to give you the answer of "just play with it" but that's what I had to do...

I THINK what I did was set the RJC valve at something like 2 turns in, and then adjusted my WG rod to my desired boost level. This set my base boost level, and then I went from there with the RJC valve. They do work and work damn well, but it took some figiting to get mine to only spike in the 1lb range(and thats acceptable to me).

Then again I heard porting your WG kills this problem... but Im too lazy to do that

 

["Turbo-T"]

I too have also had issues with boost spikes.

For instance I have my RJC boost controller set to 23 PSI. On at least one occasion when I got into the boost it went up to 25 PSI then quickly dropped down to 23.

I called Jason at RJC and spoke to him on this. He informed me there should not be any kind of spike like that.