i was just reading damian 04-19-03 thread about "My boost control setup - perfect 10-8-10 pattern" i was just wondering if this type of set up is still being used or what type up update have been done over the years..

i have had a boost issue that i cant figure out and i have been searching the forum and i keep finding these old threads with awesome information but i dont see any updates.

 

your question is very vague. are you wondering if there is a better boost pattern for seq turbos??

 

Here's the latest updates that I know about to that thread:

https://www.rx7club.com/showpost.php...6&postcount=10

 

what i meant was - Is this set up still being used?

 

Do you mean by him (damian ) or by other rx7 enthusiast in general?

If you are wondering specifically about damian, perhaps send him a pm. Other rx7 enthusiast in general, yes others still use the stock twins in sequential.

 

nooo man am i that illiterate when writing..i mean in general,i think this is a good mod done by damian but its from 2003,i just wanted to know if you guys in the forum still do this mod or have you guys found better ways..

 

I'm still using the dual ball-spring "home-depot" boost controllers that I discussed in my last post (the 3rd link in the post I linked). They've been working flawlessly, perfectly holding the 11-9-10 boost pattern (see attachment) that I adjusted them to, for 4 years now.

Dave

 

I am using this setup with a pair of JoeP inline controllers.

The only trick to Damian's setup is that in the early part of his thread he did not discuss capping the extra nipple on the wg and precontrol actuators. Somewhere in the later posts he did, but it's not shown in the diagram. Use a good quality (i.e. not from Autozone) rubber cap or a short section of hose with something solid fastened in the end to cap the end. This will allow the boost controller to work more responsively.

Dave

 

I used blank (no holes) pills in the lines from the actuators to the solenoids.

Dave

 

I also use dual ball and spring controllers. They allow very fine control of both primary and secondary and boost pattern is rock solid and does not vary.

 

do you guys have vents on the manual controllers?

 

http://www.mcmaster.com/ctlg/DisplCt...54344087987953

most people use the setup mention but not illustrated later in his thread.

 

The JoeP's that I use do have a small vent hole. That's all I know about it.

Dave

 

so these boost controller vent them selves out at vacuum? In other words once the actuator is activated and pressure in the line where does the pressure get relieved from?

 

In the Halmans that I use there is a small vent hole on the pressure side. This setup works very well and has proven very reliable for me.

 

Greddy Profec B works for me and its adjustable from the driver's seat on the go.

 

The only significant "flow" of air is into the actuator and back out again through the hose to the compressor elbow.

The vent holes in the controllers I suspect only serve to dampen the system a bit.

Dave

 

The vent holes in the controllers are there to prevent their "locking" after seeing higher boost levels from boost pressure trapped downstream of the ball.

Quote from The "D.I.Y. Manual Boost Controller" (link: http://www.geocities.com/chmwatson/FAQs/mbc.html?20066 )on Geocities.com:
--------------------------------
"The bleeder hole is not large enough to affect the signal to the Waste Gate but it is necessary to gently vent off excess vacuum or pressure in the line which causes a type of signal lock. If the hole wasn't put in, the controller would have difficulty controlling boost above about 15 pounds."
-----------------------------

Dave

 

See above post.

Dave