andre sinclair

iTrader: (36)

O.K. Gents/Ladies,

Let me pick you brains...I have a 93 Rx7 w / 80,000 miles stock with minor mods. DP, CB, PFs intercooler, Supra fuel Pump and PMC purple computer etc.

I was driving the car doing 17psi boost as always do for 2 years now. All of a sudden I heard a blast of air like a hose had blown off. Checked it and it was the outlet nipple on the primary turbo. It has 2 nipples to read pressure which a vacuum line/pill goes to, coming from the primary turbo`s wastegate and the other one goes to the secondaries I guess.

Re-insert the nipple and added a little JB Weld to keep it secure...TEST DROVE THE CAR AND NOW INSTEAD OF 17PSI LIKE BEFORE ALL I SEE IS 8PSI.

Please advise if you familar with this problem.


Thanks,
Andre

insomniac

iTrader: (5)

check the all of your cupplings, look for hidden tears.

andre sinclair

iTrader: (36)

they are all good.

TpCpLaYa

iTrader: (10)

mabye you weld job needs a lil more work. Look at that for any tiny holes

DaveW

Your symptoms point to a MAJOR boost leak, not just a nipple blowing off. Recheck all the couplers, etc. Actually remove and inspect them. Sometimes tears are hard to see.

afterburn27

iTrader: (5)

I'd recheck your jbweld job, also look very carefully for splits in the couplers.

And you are running 17psi on stock injectors??? And your motor has lasted for 2 years?? Crazy!

andre sinclair

iTrader: (36)

yes i have stock injectorts with the peter farrell computer

KevinK2

if you lost the pill in the wg hose, likely limited to 8 psi.

17 psi on stock turbos, in Florida ... that's some hot charge air. 2 years of good luck.

FDjunkie

If you mean that performance is normal and just the gauge is off, then maybe your weld job has partially blocked the fitting; meaning your engine is still seeing normal (?) 17 psi but the gauge is only seeing the 8 psi.

maxcooper

This is #3 on the "How to spot an FD owner" top 10 list.

-Max

lopedl

iTrader: (1)

Good catch that was damn funny! I just spilt my drink all over me.

rx74evers

iTrader: (6)

Hose to the WG solenoid near the Intake plenum has blown off will cause you to only boost at 8psi.

andre sinclair

iTrader: (36)

Past weekend I did the complete boost leak test from Y-pipe, couplers, throttlebody, turbo actuator and solenoids etc. All tested O.K.

I cannot understand it myself the pills are not present in both lines (Wastegate or turbo pre-controll) I don`t know if something was sticking from before enabling me to run 17 psi boost..However, I continue to check to see what else could have gone wrong.

If I want to run 12 to 15 psi boost what size holley jet s do I need to install in each line?

Please advise.

Thanks,
Andre

adam c

iTrader: (2)

Easy cheap boost controller:

http://www.robrobinette.com/boost_controller.htm

dubulup

the restriction could have been in the nipple...when it broke, the "built in pill" left the bay.

if its the small smic IC you could have blown out a press in nut plate thing...and leak boost right off the IC...should be able to make more than 8psi though...at least I did with a single.

afterburn27

iTrader: (5)

Good call! Some sets of turbos had the pills built into the nipples instead of in the lines, but if he jb-welded the original nipple back the "pill" should still be there.