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June 23
The following pictures are modifications
that I have made to the boost pipes. I was having problems with the boost
pipes blowing out of the rubber seals under full boost. What I did to cure
this problem is first take off the pipes and cut a Circumferentional (thanks
Bob) groove around the pipe in hopes that the rubber seal would clamp into
this groove and provide some traction. I used a hack saw to make the groove.
After making these modifications to the pipes I pulled out my trusty dremel and ported the inlets and outlets of the boost pipes. I tried to create a funnel effect to help move air through the pipes. Inner diameter is looking kinda small to me now. I am happy with the results of the PVC but I think that 2" muffler pipe might be in the near future (like next week).
I ported and then sanded the ends. It looks better than a straight cut off end. Should flow a lot better. Nice rose bush huh?
Everything works perfect! I no longer have problems with the pipes comming out of their seals. I did notice a problem with the boost pressure though. It seems to surge to 14 and then as RPMs come up, the boost drops down to about 12 and 1/2 pounds. I believe that the location of the wastegate pressure line is at fault. What is happening is that there may be 14 pounds of boost before the intercooler, but not after. The waste gate is reading the pressure before the intercooler and the boost gauge is reading pressure in the manifold. So when the engine starts sucking up the boost at high RPMs, the pressure drops in the line comming from the intercooler. I intend to fix this by moving the wastegate pressure line to a location after the intercooler. The only problem I see here is, I don't want to subject the wastegate diaphram to vacume of the intake manifold. This may cause premature failure of the diaphram due to flexing in both directions. I think i'm gona tap into the throttle body, (before the butterfly) and put a pressure fitting there. That'll do it! I hope.
Looks good to me. Just needs carpet now.