Z24O Posted October 24, 2006 Share Posted October 24, 2006 Greetings from downunder Just about finished collecting parts for the turbo conversion of a 302 windsor in my "z" motor is not standard(alloy heads,roller cam/rockers,o-ringed block,forged pistons 8.5:1,crank girdle)and looking for 500-550HP looking for suggestions re turbo size,i've done a search and most guys are using PT76 turbos....i was wondering about either a garrett GT35/82r or a TO4Z with a .84 turbine housing which turbine size for rapid/low rev spool-up(have 50mm wastegate)?? what difference in spool-up am i likely to notice going to a dual ball bearing rather than plain bearing turbo?? i will be running an auto(have 5 speed atm) looking for good low rev torque/spool-up as long as i will be able to get traction(running 3.54:1 quaife 'lsd' diff with 15"x215 60 series tires,std suspension) thanks guys Quote Link to comment Share on other sites More sharing options...
blueovalz Posted October 24, 2006 Share Posted October 24, 2006 ... i will be able to get traction(running 3.54:1 quaife 'lsd' diff with 15"x215 60 series tires,std suspension) Is this a typo? 215 tires behind a N/A 302 could be boiled off in no time. Did you mean 315? I can't help with the turbo questions, but I like your idea. When you can, would you provide more info on the set-up and parts? Quote Link to comment Share on other sites More sharing options...
Z24O Posted October 24, 2006 Author Share Posted October 24, 2006 g'day terry you sent me the 280zxt halfshafts via ebay no typo on the tyres,looking for the sleeper look,these tyres don't do too bad behind the current boss 302na 5 speed for traction...more a matter of feathering the throttle/clutch in the first 2 gears the turbo motor is more serious,hence the auto trans(C4 or AOD...not sure yet) and that's why the turbo selection will be crucial,needs to deliver even power from low down rather than come on with a rush higher up and blow the traction away here's a pic of the car as is....black one is my 240Z with RB30Turbo regards paul WA Quote Link to comment Share on other sites More sharing options...
blueovalz Posted October 24, 2006 Share Posted October 24, 2006 Looking good. The Boss heads probably helped even the torque out a bit. Anyway, looking forward to watching the progress on this project. Quote Link to comment Share on other sites More sharing options...
wreckedj30 Posted October 24, 2006 Share Posted October 24, 2006 i'd use the aod, just upgrade the inside shafts and such, yeah it uses alot of power up, being that its auto, but you'll thank your self for it. The c4 tends to break don't no had 4 break on me and my bro. But the od is still hittin hard and standin strong. Or find a six speed! Quote Link to comment Share on other sites More sharing options...
alexideways Posted October 24, 2006 Share Posted October 24, 2006 You selling that rb30 Z240?? Quote Link to comment Share on other sites More sharing options...
Z24O Posted October 25, 2006 Author Share Posted October 25, 2006 You selling that rb30 Z240?? alex, you talking about the car or just the motor? Quote Link to comment Share on other sites More sharing options...
Z24O Posted October 25, 2006 Author Share Posted October 25, 2006 no takers on the turbo query? Quote Link to comment Share on other sites More sharing options...
Brad-ManQ45 Posted October 25, 2006 Share Posted October 25, 2006 I would think a T-66 and an .81 AR turbine with P trim would do nicely... With the size of the engine and torque available, I don't think you need a BB unit at all, and can get a 360 degree thrust bearing journal type turbo and be plenty happy. Quote Link to comment Share on other sites More sharing options...
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