Second Gen Posted August 14, 2012 Report Share Posted August 14, 2012 Have been driving my 1993 mazda RX7 all year (After a new Turbo installation about 4 months ago). Started noticing the boost is only hitting .8 bar when it has a14.7 lb / 1 Bar spring. Started thinking about removing the spring and cleaning out the WG, but this morning "Wow" back to 1 bar again. I know a lot of carbon (Especially with the RX7's) can build up in the exhaust, but never heard of one getting better. Ideas? Note - Car has an aftermarket Turbo, 3" exhaust (No kittens) and a Tial WG. The WG and exhaust has to be about 5 years old (Again the turbo is fresh as of 4 months ago) Quote Link to comment Share on other sites More sharing options...
Mr. Jones Posted August 14, 2012 Report Share Posted August 14, 2012 Moved to tech. Quote Link to comment Share on other sites More sharing options...
schmuckingham Posted August 14, 2012 Report Share Posted August 14, 2012 So you removed the gate, cleaned it, and it went back to where it was supposed to be? Does it have a boost controller on it? Quote Link to comment Share on other sites More sharing options...
CRed05 Posted August 14, 2012 Report Share Posted August 14, 2012 If there was carbon buildup in the wastegate, causing it to stick or have a restriction...wouldn't you be seeing more boost? Quote Link to comment Share on other sites More sharing options...
schmuckingham Posted August 14, 2012 Report Share Posted August 14, 2012 If there was carbon buildup in the wastegate, causing it to stick or have a restriction...wouldn't you be seeing more boost? My same thoughts, if it was carbon it would stick partially open and make boost go up. If it was stuck open all the way boost would take forever to build. Quote Link to comment Share on other sites More sharing options...
Patterson Posted August 14, 2012 Report Share Posted August 14, 2012 What kind of WG is it? Quote Link to comment Share on other sites More sharing options...
Second Gen Posted August 14, 2012 Author Report Share Posted August 14, 2012 Did not clean the WG. Was thinking about it when it started boosting right. As mentioned above the WG is a Tial. Assumed like above the carbon buildup should have reduced the boost. Running like a bat out of hell again and not complaining. Just a little concerned that what ever the issue might have been may cause it to over boost or go back to where it was. Jones - should have put in tech originally (sorry) Quote Link to comment Share on other sites More sharing options...
Smokey Posted August 14, 2012 Report Share Posted August 14, 2012 What are you using for a boost controller? It's been really hot this year and then recently cooled off. If you're using an older boost control device that could affect it too. Quote Link to comment Share on other sites More sharing options...
Gergwheel1647545492 Posted August 14, 2012 Report Share Posted August 14, 2012 My same thoughts, if it was carbon it would stick partially open and make boost go up. If it was stuck open all the way boost would take forever to build. if the gate was stuck open a little bit wouldn't it take longer to create boost as you have less pressure building in the exhaust? Quote Link to comment Share on other sites More sharing options...
schmuckingham Posted August 14, 2012 Report Share Posted August 14, 2012 if the gate was stuck open a little bit wouldn't it take longer to create boost as you have less pressure building in the exhaust? depends on how far really, if it doesnt open fully then it spikes. If its stuck open is takes forever to spin the turbine wheel. If the gate is stuck open and its vented you would hear that while it idled, sound like a giant exhaust leak Quote Link to comment Share on other sites More sharing options...
Second Gen Posted August 15, 2012 Author Report Share Posted August 15, 2012 (edited) Spools normally (Around 3K) and did not see any spikes. Also I am not running a boost controller. I am running with the stock Tial 14.6 lb wastegate spring only. Guess I should think about adding one back into the mix (Really liked the additional .2 Bar) Unfortunately could not boost above .89 BAr again today (Sucks). Guess when I tear her down this fall I will add in the boost controller when replacing the the clutch and sending the injectors to RC for cleaning / rebalancing. Edited August 15, 2012 by Second Gen Can't spell Quote Link to comment Share on other sites More sharing options...
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