747pwr Member 68 Member For: 13y 1m 5d Gender: Male Posted 22/03/14 10:40 PM Share Posted 22/03/14 10:40 PM Hey guysHave a FG mk2 turbo ute and recently installed a gtx35 with a 0.6 front on it.Car has plaz 1000hp kit with 4inch race box.Xforce 4inch full exhaustPerformance valve springs with to retainersMassive fuel system etc etc Made 430rwhp with the standard baby FG turbo at 16psi on 98. Once we switched to the garret gtx with turbosmart gate and waste gate ported it wouldn't make any boost higher than 16. Currently at 470hp peak power but it tapers back to 16psi no matter how high boost is set or even with the waste gate held shut. Exhaust isn't blocked.... Wondering what else it could be ? It's like the turbo can't flow any more air Link to comment Share on other sites More sharing options...
barnz Member 3,047 Member For: 10y 4m 27d Gender: Male Location: Brisbane Posted 22/03/14 11:10 PM Share Posted 22/03/14 11:10 PM .06 cover would be the gtx3576 wouldnt it? Link to comment Share on other sites More sharing options...
747pwr Member 68 Member For: 13y 1m 5d Gender: Male Posted 22/03/14 11:10 PM Author Share Posted 22/03/14 11:10 PM Yeah I believe so Link to comment Share on other sites More sharing options...
747pwr Member 68 Member For: 13y 1m 5d Gender: Male Posted 22/03/14 11:11 PM Author Share Posted 22/03/14 11:11 PM Just checked the rating and it's only rated to 600hp so it could possibly be maxed out and everything is working fine ? Link to comment Share on other sites More sharing options...
AzMahoony Hench, but no longer shredded or tanned. Member 3,343 Member For: 17y 19d Gender: Male Location: Canning Vale, W.A Posted 22/03/14 11:28 PM Share Posted 22/03/14 11:28 PM 470 is like 355-360rwke on 98 that's about right pal, give er some e85 lovin if you want to hit that 400rwkw region Link to comment Share on other sites More sharing options...
barnz Member 3,047 Member For: 10y 4m 27d Gender: Male Location: Brisbane Posted 22/03/14 11:30 PM Share Posted 22/03/14 11:30 PM Somebody with more know how will probably chime in but yeah if it is the 76 there not good for a great deal more than the standard one I think. But getting close to 500rwhp with that brutal spool must be awesome ;-) Link to comment Share on other sites More sharing options...
Henz Tampon inserted, Auto Acquired, next purchase a new handbag Donating Members 9,946 Member For: 16y 27d Gender: Male Location: Vic Posted 22/03/14 11:41 PM Share Posted 22/03/14 11:41 PM Still should go over 16psi easily. Is it coming on fast or slow? 1 Link to comment Share on other sites More sharing options...
AzMahoony Hench, but no longer shredded or tanned. Member 3,343 Member For: 17y 19d Gender: Male Location: Canning Vale, W.A Posted 22/03/14 11:49 PM Share Posted 22/03/14 11:49 PM (edited) Ye prolly some actuator related issue, did you fit it yourself or did the workshop? When I did my turbo I used a compressor to push the actuator arm out and attached it to the wastegate, but set it miles too tight and my tuner had problems controling the boost also so he ended up taking it off and re-doing it.Just throwin it out there if it helps at allEdit - also Turbosmart 12psi actuator. Edited 22/03/14 11:50 PM by turboboink Link to comment Share on other sites More sharing options...
barnz Member 3,047 Member For: 10y 4m 27d Gender: Male Location: Brisbane Posted 22/03/14 11:54 PM Share Posted 22/03/14 11:54 PM When you say turbosmart gate do you mean actuator or external cause you also say wastgate ported so im assuming internal? Link to comment Share on other sites More sharing options...
747pwr Member 68 Member For: 13y 1m 5d Gender: Male Posted 23/03/14 12:58 AM Author Share Posted 23/03/14 12:58 AM Thanks for the replies.Don't think it's a actuator issue because we have tried different preload and different springs.It's still internally gated with the wastegate hole ported.It spools faster and earlier than standard and is literally whistling off idle, it does spool up brutally but is lacking the top end and peak power I'm chasing. Surely it can be pushed past 16psi in the top? Link to comment Share on other sites More sharing options...
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