Grainger valve with external gate?

[cool 84]

Has anyone done this and is it necessary? Mods are in my sig. I have the Innovative Turbo Systems gate. I believe most external gates stay closed until the boost gets real close to the preset level unlike the stock gate that starts opening early. My car was very laggy before with the TA64 and was not much fun to drive. Since then I've increased displacement and compression, added a 3" downpipe, better intercooler, better heads, and raised the stall from 2,600 to 3,200rpm all in an effort to get it to spool near stock. If a $35 valve will help me reach this goal, I'll get one. BTW, I've never driven the car with the new parts, still waiting to get the motor back but I'm trying to do every little trick I can think of to justify the money I've spent.

 

[snodgrass]

I have a deltagate on my car, and I just made a grainger valve setup for it today. Spool up was good before, but now it's instant. Car felt a little boggy when stepping on it from a 30 mph roll. Now it blows the tires off almost instantly. The only problem I have now is I still get boost creep at over 4500 rpm because the deltagate is too small. Making one was a lot of trial and error to get it to work right. I found that you need a very light weight spring and good airflow thru the whole assembly to push on that big diaphram in the deltagate to open it quickly and eliminate a boost spike.. My advise is to just buy the $35 one and I think you will really like it. It really makes the car fun to drive. Almost like a powerful normally aspirated v8

 

[cool 84]

Thanks, that's all I needed. I guess I can't go wrong for only $30.

 

[snodgrass]

Another note... Get some good tires!!!!

 

[WFO]

i've contemplated plumbing a check valve in line before my boost control valve.you can get check valves with specific "cracking pressures" from hydraulic shops,i was gonna get one with 15 psi crack and put it before my boost controller.that way my boost controller wouldn't see any signal til the check valve cracks,so it should slam right up to 15 psi...

should work in theory...

 

[Sinful6]

WFO, your idea will work, however, my controller is a combination of the two. It is like a check valve with a variable "cracking pressure". It eliminated the need for a bleeder, and gives you that great spool-up and allows you to adjust your boost for only $35 shipped Check this URL: http://www.turbobuick.com/forums/showthread.php?s=&threadid=77937


email: dcc@japan.com



-DC

 

[WFO]

unfortunately,i'm a little neurotic about my plumbing,and everything that can be teflon/stainless hose/fittings is,including my entire wastegate sytem(deltagate on the crossover).

i want the benefits of the spring loaded valve,just gotta do it "my way" .

whatta ya gonna do,i was a jet mechanic in the marines,it's a surprise i don't have titanium tubing for tranny lines .

 

[galoush]

WFO check out my post in the general section under Grainger valve upgrade.