okay so I finally got a hand on a boost gauge, and my boost pattern is around 10 - 6 - 8 instead of the utopic 10-8-10

how high are the chances that the problem comes from the rats nest rubber hoses? if the chances are high it'll give me a reason the do the silicon job I guess

 

http://www.autosportracetech.com/RX-7/rx7stuff.htm

 

looks like good reading, I'll attack this thing

 

Check out the "FAQ" thread at the top of this forum. Scroll down to "T" for turbo's and read the troubleshooting links. Get yourself a MityVac hand pump or similar unit and you'll be in business. Start making a list of things to replace and get a second job so you can afford it ;-)