Todd, Does enlarging the wastegate hole give some of the same effect as an increased A/R ratio turbine housing (say 1.15 for instance) to prevent overspeed at altitude ??..............
Kelly Troyer
All I did to put mine was sprayed some toolmakers ink on the closed wastegate (any spray paint will work), to show clearly the extent of the wastegate coverage. Then I removed the wastegate and the stock wastegate hole is about the size of a dime. The cover is about the size of a dollar coin (Loonie, up here in Canada). I then used a die grinder to open up the hole to within 1/16" of the coverage of the gate. On the inside I took care to open it up even further to have a smooth inflow path. I didn't change the bushings on the shaft. I've never had any trouble controlling boost with that. But the new one that I've got coming will have an even larger hole without a new larger gate. Todd, I think from memory the waste gate mechanism is welded in (Turbo is at local precision turbos) If necessary I will do the wastegate upgrade myself. Easy to put S/S bushes on the shaft – just have to get it all apart. Possibly famous last words. How did you do yours Todd? Neil. Hi Neil; When I talked with him he said his web page is out of date and need an update. But one of the things is all of his upgrades now have an 0.7 A/R Dave, Todd et all, I just rechecked BNR upgrades as all have an A/R of 0.6, whereas I think it was you Dave that gave the specs of 1.15?? Did I read it right? Just have to be sure when I talk to the local bloke who is quoting $1000 AUD for a basic upgrade. That is approx. $660 USD. Seems he is to just replace the air turbine and housing only. I will ask about the wastegate when I talk to him as BRN modify all wastegates, but go for up to 17 PSI. Only need 7 psi max?? Think I am finally getting there. Just need to confirm that the A/R is only 0.6 and not 1.15?? Suggestions? Neil.
--
Kelly Troyer
Dyke Delta_"Eventually"
13B_RD1C_EC2_EM2
|