Cycle Valve & Manual Boost Controller
 

Guys,

Hope you're all well.

I have spent the past day researching topics in regards to cycle valves and manual boost controllers. I recently acquired my 87 Turbo and, it has a manual boost controller installed (along with a boost gauge and a A/F gauge). I am currently doing a venturi delete and overall cleaning the engine up a bit. I made my way to the cycle valve and decided to research it a bit. Appears as individuals with manual or automatic boost controllers tend to delete this item as essentially I now have a boost controller on top of a boost controller?

However, there also appears a lot of controversy about deleting the cycling valve in general - and, I haven't been able to find a true DIY on doing so.

Can someone chime in and help me out? The car has a BORLA exhaust, a chip of some sort (I still haven't checked what kind), and this boost controller. Otherwise it is stock.

Look forward to getting some help!

Regards,
Paul

1. Get some 3/8" ID fuel hose, DO NOT use flexible vacuum hose for boost-control.

2. Locate manual boost-controller where you want it. Cut length of 3/8" hose to connect it to intercooler pipe banjo-bolt.

3. Cut length of hose to go from boost-controller outlet to wastegate diaphragm.

4. Unplug CV return line from J-boot and insert plug into J-boot

Initially adjust the controller for low-boost. Then gradually increase boost until the desired level is reached. You should have all supporting mods for the boost-level you want to run: 3-bar FPR, chips with matching fuel & ignition maps (or programmable system). Also very good idea to have wideband O2 system to monitor for correct AFR.

did you check Lindsey Racing web site? they have several variations of vac line configs. elim CV, Venturi delete, manual boost controller, etc.