BenDoCo I'm getten too old for this s**t Bronze Donating Members 4,509 Member For: 11y 8m 5d Gender: Male Location: A big bridge over a river in South Australia Posted 27/07/15 05:12 AM Share Posted 27/07/15 05:12 AM (edited) Was going to suggest a smoke test.... I don't know if my tuners dyno is a high or low power reader or what but to me, it doesn't matter coz as long as I know its getting the correct amount of fuel with the right spark I'm happy. My brief to the tuner was the total opposite to what it sounds like your after. I don't want a tyrefryer so my dyno printout looks more like an 82 was fitted. Boost comes on a tad slower, holds up high for a while b4 dropping off and torque was limited to protect the trans..... didn't help my half shaft though hehehe. Wondering if there's something else going on with your tune coz mine is incredible all the way through the revs Edited 27/07/15 05:14 AM by BenDoCo 1 Link to comment Share on other sites More sharing options...
747pwr Member 68 Member For: 13y 9m 1d Gender: Male Posted 27/07/15 05:48 AM Author Share Posted 27/07/15 05:48 AM Sorry ill repeat that - the complete turbo...core & housing and turbosmart actuator were installed on another FG when it was all brand new, it made 520rwhp and they had trouble intially controlling boost so they ported the housing, he removed that after few months and we put it straight onto my car everything the same and mine cant make over 470rwhp or 18psi. Pretty sure his only made 18psi as well and the difference between the car is his is manual with cams, mine is auto with standard cams. This is all same workshop / dyno.... They never tried to make any more power in his car because they didnt wanna push the engine and it was getting a bigger setup anyway. I could try the smoke test but honestly the car runs and idles great, never hunts or does anything to make me think it has an issue leak a boost leak. Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 6m 15d Gender: Male Location: @ my laptop Posted 27/07/15 07:14 AM Share Posted 27/07/15 07:14 AM bjcare you saying it was still too slow coming onto boost with the gate wired shut? Link to comment Share on other sites More sharing options...
747pwr Member 68 Member For: 13y 9m 1d Gender: Male Posted 27/07/15 07:17 AM Author Share Posted 27/07/15 07:17 AM Ratter I was hoping you would end up on this post, do you have any suggestions on why the 76 cant produce more than 18psi? or have you tuned any that have easily made 20 plus psi... the turbo is only rated to 600bhp, 470rwhp through auto is probably getting close to that? Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 6m 15d Gender: Male Location: @ my laptop Posted 27/07/15 08:11 AM Share Posted 27/07/15 08:11 AM I have done a couple but not pushed high boost at all, would need to check my dyno to be accurate, but have seen only around the 350-360 rwkw mark, anymore timing they would ping.We have to remember that manifold boost is only a measurement of the extra air the engine could not consume so the rwkw number is a better indication of how it's performing, if the turbo is maxed out the boost will be dropping no matter how strong an actuator is used. pumping 20 psi in it early may not give a higher rwkw number, it just may mean this number is made earlier in the rev range I.e Bels G6ET would make 320+ rwkw at 13 psi, on 15 psi it would still make 320+ rwkw just at earlier rpm 1 Link to comment Share on other sites More sharing options...
brutz Member 25 Member For: 9y 5m 8d Posted 27/07/15 09:04 AM Share Posted 27/07/15 09:04 AM I've had a gtx76 for a while. Guessing close to 2 years. Pushing it 454rwkw on e85. No probs. Sent from my iPhone using Tapatalk 1 Link to comment Share on other sites More sharing options...
747pwr Member 68 Member For: 13y 9m 1d Gender: Male Posted 27/07/15 10:08 AM Author Share Posted 27/07/15 10:08 AM I've had a gtx76 for a while. Guessing close to 2 years. Pushing it 454rwkw on e85. No probs. Sent from my iPhone using TapatalkHoly that's more than it should make at the engine, the turbine is only rated to 600hp, run any times with that ? Link to comment Share on other sites More sharing options...
JETURBO ...JD TUNING ADELAIDE... Gold Donating Members 23,708 Member For: 16y 6m 11d Gender: Male Location: Adelaide Posted 27/07/15 10:45 AM Share Posted 27/07/15 10:45 AM Garrett under rate all their turbos so don't get caught up on that GTX76 has done 130+mph plenty of times Again your issue is not the front half on the turbo .... 2 Link to comment Share on other sites More sharing options...
747pwr Member 68 Member For: 13y 9m 1d Gender: Male Posted 27/07/15 10:54 AM Author Share Posted 27/07/15 10:54 AM Garrett under rate all their turbos so don't get caught up on that GTX76 has done 130+mph plenty of times Again your issue is not the front half on the turbo ....Thinking I should take off and look for cracks or poor sealing of gate ? Link to comment Share on other sites More sharing options...
JETURBO ...JD TUNING ADELAIDE... Gold Donating Members 23,708 Member For: 16y 6m 11d Gender: Male Location: Adelaide Posted 27/07/15 10:55 AM Share Posted 27/07/15 10:55 AM Yuuuuuuuuuuup Link to comment Share on other sites More sharing options...
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